Artigos de revistas: "Hydroxyde de nickel"

1

Dubé, Patrick, Louis Brossard e Hugues Ménard. "Hydrogénation électrocatalytique sur des catalyseurs composites de nickel et hydroxyde d'aluminium en cellule dynamique". Canadian Journal of Chemistry 80, n.º 4 (1 de abril de 2002): 345–49. http://dx.doi.org/10.1139/v02-024.

Texto completo da fonte

Resumo:

The electrocatalytic hydrogenation (ECH) of cyclohexanone into cyclohexanol has been studied in aqueous media with electrocatalysts on composites powders. These powders are formed of nanoaggregates of nickel obtained through a physical deposition under vacuum on particles of Al(OH)3, AlO(OH), and γ-Al2O3. The ECH reaction was done in a dynamic cell. Its yield is closely dependent on the nature of the non-metallic particles whose nature greatly influences the adsorptiondesorption of the organic compounds involved in the reaction.Key words: electrocatalysis, aluminum oxide, aluminum hydroxide, hydrogenation, dynamic cell.[Traduit par la Rédaction]

Estilos ABNT, Harvard, Vancouver, APA, etc.

2

Shang, Wei, Chang Jiu Liu e Yu Qing Wen. "Morphology and Electrochemical Performance of Amorphous Nickel Hydroxide Added Anion". Advanced Materials Research 834-836 (outubro de 2013): 466–71. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.466.

Texto completo da fonte

Resumo:

Amorphous nickel hydroxides added anion (PO43-) has been prepared by chemical precipitation method combined with rapid quench technique. The morphology of the prepared samples were characterized by scanning electron microscope (SEM), and energy dispersive spectroscopy (EDS). The effect of anion on the electrochemical performance of the prepared nickel hydroxides were investigated by charge/discharge tests and cyclic voltammetry (CV). The results demonstrated that amorphous nickel hydroxide added PO43-has better electrochemical performance, such as higher discharge potential, better reaction reversibility, higher the charging efficiency, and better cyclic stability, than that of the pure amorphous nickel hydroxide.

Estilos ABNT, Harvard, Vancouver, APA, etc.

3

Balram, Anirudh, Jie Chao Jiang, Moisés Hernández Fernández e Dennis De Sheng Meng. "Nickel-Cobalt Double Hydroxide Decorated Carbon Nanotubes via Aqueous Electrophoretic Deposition towards Catalytic Glucose Detection". Key Engineering Materials 654 (julho de 2015): 70–75. http://dx.doi.org/10.4028/www.scientific.net/kem.654.70.

Texto completo da fonte

Resumo:

In this work, we present a facile technique based on electrophoretic deposition (EPD) to produce transition metal hydroxide decorated carbon nanotubes (CNT) for electrochemical applications. We specifically explore the performance of nickel-cobalt hydroxides given their high activity, conductivity and stability as compared to the individual hydroxides. We exploit the high local pH at the negative electrodes during water-based EPD to form nanoparticles of nickel-cobalt hydroxides in situ on the CNT surface. We focus our work here on obtaining functional and conductive deposits on CNTs. The hydrophilic binderless deposits of Ni-Co double hydroxide decorated CNTs obtained here are used for non-enzymatic glucose detection. XPS data and electrochemical testing reveal difference in the deposited double hydroxide based on chronology of charging salt addition even at the same ratio. When cobalt and nickel salts are sequentially added at a ratio of 1:1, the deposited double hydroxides show excellent glucose sensitivity of ~3300μA/mM.cm2 at applied potential of 0.55V vs. Ag/AgCl reference electrode.

Estilos ABNT, Harvard, Vancouver, APA, etc.

4

Hall, David S., David J. Lockwood, Christina Bock e Barry R. MacDougall. "Nickel hydroxides and related materials: a review of their structures, synthesis and properties". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, n.º 2174 (fevereiro de 2015): 20140792. http://dx.doi.org/10.1098/rspa.2014.0792.

Texto completo da fonte

Resumo:

This review article summarizes the last few decades of research on nickel hydroxide, an important material in physics and chemistry, that has many applications in engineering including, significantly, batteries. First, the structures of the two known polymorphs, denoted as α -Ni(OH) 2 and β -Ni(OH) 2 , are described. The various types of disorder, which are frequently present in nickel hydroxide materials, are discussed including hydration, stacking fault disorder, mechanical stresses and the incorporation of ionic impurities. Several related materials are discussed, including intercalated α -derivatives and basic nickel salts. Next, a number of methods to prepare, or synthesize, nickel hydroxides are summarized, including chemical precipitation, electrochemical precipitation, sol–gel synthesis, chemical ageing, hydrothermal and solvothermal synthesis, electrochemical oxidation, microwave-assisted synthesis, and sonochemical methods. Finally, the known physical properties of the nickel hydroxides are reviewed, including their magnetic, vibrational, optical, electrical and mechanical properties. The last section in this paper is intended to serve as a summary of both the potentially useful properties of these materials and the methods for the identification and characterization of ‘unknown’ nickel hydroxide-based samples.

Estilos ABNT, Harvard, Vancouver, APA, etc.

5

Sidorova, Elena N., Ella L. Dzidziguri, Yulia P. Vinichenko, Dmitriy Yu Ozherelkov, Alexander S. Shinkaryov, Alexander A. Gromov e Anton Yu Nalivaiko. "Metal Nanoparticles Formation from Nickel Hydroxide". Materials 13, n.º 20 (21 de outubro de 2020): 4689. http://dx.doi.org/10.3390/ma13204689.

Texto completo da fonte

Resumo:

In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen adsorption, infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy methods were used for nanoparticle characterization. Based on the resulting data, a model of the Ni(OH)2 aggregate structure after deposition was proposed. The number of nickel hydroxide particles required to form one nickel nanoparticle was estimated, and a model of its formation was proposed.

Estilos ABNT, Harvard, Vancouver, APA, etc.

6

Yin, Jingzhou, Guolang Zhou, Xiaoliang Gao, Jiaqi Chen, Lili Zhang, Jiaying Xu, Pusu Zhao e Feng Gao. "α- and β-Phase Ni-Mg Hydroxide for High Performance Hybrid Supercapacitors". Nanomaterials 9, n.º 12 (25 de novembro de 2019): 1686. http://dx.doi.org/10.3390/nano9121686.

Texto completo da fonte

Resumo:

Mg-substituted α- and β-phase nickel hydroxides with high specific capacitance and good stability have been synthesized via sacrificial metal-based replacement reaction. 2D α- and β-phase nickel-magnesium hydroxide (NiMg-OH) have been synthesized by sacrificing magnesium (Mg) powder with nickel salt aqueous solutions. Interestingly, the phase of the obtained NiMg-OH can be controlled by adjusting the nickel precursor. As well, the Mg powder is used not only as Mg source but also alkali source to form NiMg-OH. The α-phase nickel-magnesium hydroxide sample (α-NiMg-OH) exhibits lager surface area of 290.88 m2 g–1. The electrochemical performances show that the α-NiMg-OH presented a superior specific capacitance of 2602 F g–1 (1 A g–1) and β-phase nickel-magnesium hydroxide sample (β-NiMg-OH) exhibits better stability with 87% retention after 1000 cycles at 10 A g–1. The hybrid supercapacitor composed of α-NiMg-OH and activated carbon (AC) display high storage performance and cycle stability, it presents 89.7 F g–1 (1 A g–1) and of 0–1.6 V potential window and it maintains capacitance retention of 84.6% subsequent to 4000 cycles.

Estilos ABNT, Harvard, Vancouver, APA, etc.

7

Ramesh, T. N., P. Vishnu Kamath e C. Shivakumara. "Classification of stacking faults and their stepwise elimination during the disorder → order transformation of nickel hydroxide". Acta Crystallographica Section B Structural Science 62, n.º 4 (12 de julho de 2006): 530–36. http://dx.doi.org/10.1107/s0108768106013188.

Texto completo da fonte

Resumo:

Nickel hydroxide samples obtained by strong alkali precipitation are replete with stacking faults. The local structures of the stacking faults resemble the stacking patterns of different polytypic modifications that are theoretically possible among the layered hydroxides. This resemblance becomes a basis for the classification of stacking faults into different types. Each type of stacking fault produces a characteristic non-uniform broadening of peaks in the X-ray powder diffraction pattern of nickel hydroxide. DIFFaX simulations aid the classification and quantification of stacking faults. Hydrothermal treatment of a poorly ordered nickel hydroxide slurry at different temperatures (338–473 K) and different durations (5–48 h) shows that the stacking faults are removed in a stepwise manner. The as-precipitated sample has 17–20% stacking faults of the 3R 2 variety, which evolve into the 2H 2 type at 413 K. The 2H 2 stacking faults persist up to 443 K. The stacking faults are completely removed only at 473 K. At this temperature an ordered β-Ni(OH)2 phase is observed.

Estilos ABNT, Harvard, Vancouver, APA, etc.

8

Thimmasandra Narayan, Ramesh. "Effect of Crystallinity of β- and βbc-Nickel Hydroxide Samples on Chemical Cycling". Indian Journal of Materials Science 2015 (27 de julho de 2015): 1–7. http://dx.doi.org/10.1155/2015/820193.

Texto completo da fonte

Resumo:

β-phases of nickel hydroxide and cobalt hydroxide samples crystallize in cadmium iodide type structure. β-cobalt hydroxide on oxidation generates β-CoOOH which crystallized in 3R1 polytype while the structure of β-phase of NiOOH polytype is less well understood. β- and βbc-phases of nickel hydroxide samples were prepared by using ammonium hydroxide and sodium hydroxide as precipitating agents. Powder X-ray diffraction data shows that β-phase of nickel hydroxide is perfectly crystalline in nature while βbc-phase of nickel hydroxide is poorly ordered. β- and βbc-phases of nickel hydroxide samples were subjected to chemical oxidation using sodium hypochlorite. The oxidized phases of β- and βbc-phases of nickel oxyhydroxide are highly disordered and the broadening of reflections in the powder X-ray diffraction patterns is due to the presence of structural disorder, variations in the crystallite size, and strain. On reduction of β- and βbc-phases of nickel oxyhydroxide, the powder X-ray diffraction patterns visually match the powder X-ray diffraction data of the pristine phases of β- and βbc-phases of nickel hydroxide indicating that the β-phase of nickel hydroxide does not transform to βbc-phase of nickel hydroxide, but the particle sizes are significantly affected.

Estilos ABNT, Harvard, Vancouver, APA, etc.

9

Ramesh, Thimmasandra Narayan. "Effect of Substituents on the Electrochemical Reversible Discharge Capacity of Cobalt Hydroxide Electrodes". Journal of New Materials for Electrochemical Systems 18, n.º 2 (30 de maio de 2015): 091–93. http://dx.doi.org/10.14447/jnmes.v18i2.375.

Texto completo da fonte

Resumo:

Cobalt hydroxide, nickel hydroxide-cobalt hydroxide and zinc oxide-cobalt hydroxide biphasic mixtures were prepared by precipitation method. In spite of structural similarities exhibited by nickel hydroxide and cobalt hydroxide samples, former is a good electrode material and exchanges 1e-/Ni while latter does not show any reversibility. Presence of small amount of other metal ions such as nickel or zinc in the lattice of cobalt hydroxide or as a biphasic mixture of cobalt hydroxide-nickel hydroxide/cobalt hydroxide- zinc oxide, exchange up to 0.2 to 0.24e- exchange compared to pure cobalt hydroxide which shows 0.1 e- exchange.

Estilos ABNT, Harvard, Vancouver, APA, etc.

10

Liu, Chang Jiu, Chun Xiao Xing, Shi Juan Chen e Yan Wei Li. "Structure and Electrochemical Performance of Amorphous Nickel Hydroxide Doped with La and Al". Materials Science Forum 663-665 (novembro de 2010): 1217–20. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.1217.

Texto completo da fonte

Resumo:

Amorphous nickel hydroxide powders doped with rare earth La3+ and Al3+ were synthesized by the combined chemical precipitation and rapid freezing method. The microstructure of the samples was characterized by XRD and Raman spectra. The electrochemical performance of the prepared samples was analyzed by electrochemical impedance spectroscopy and charge-discharge tests. The results showed that this amorphous nickel hydroxide codoped with La3+ and Al3+ had more structural defects than those of the undoped amorphous nickel hydroxide and La3+ singly doped amorphous nickel hydroxide. These abundant structural defects with La3+ and Al3+ codoped amorphous nickel hydroxide decreased the electrochemical impedance spectroscopy and improved the electrochemical reversibility of the amorphous nickel hydroxide electrode.

Estilos ABNT, Harvard, Vancouver, APA, etc.

11

Dahonog, Luigi A., Joey D. Ocon e Mary Donnabelle L. Balela. "Pseudocapacitive Behavior of Ni(OH)₂/NiO Hierarchical Structures Grown on Carbon Fiber Paper". Solid State Phenomena 266 (outubro de 2017): 177–81. http://dx.doi.org/10.4028/www.scientific.net/ssp.266.177.

Texto completo da fonte

Resumo:

Transition metal oxides and hydroxides, specifically nickel (Ni), are currently being studied for their pseudocapacitive behaviors due to their high specific capacitance and efficient redox reactions. In this study, nickel oxide (NiO) and nickel hydroxide [Ni (OH)2] hierarchical structures were grown on carbon fiber paper via hydrothermal treatment for a binder-free electrode for pseudocapacitor. Cyclic voltammetry was employed to determine the influence of annealing temperature on the specific capacitance of NiO-and/or Ni (OH)2 – carbon fiber electrodes. The NiO – carbon fiber electrode annealed at 400°C exhibited the highest specific capacitance of about 1993.12 F/g at a scan rate of 2 mV/s. The carbon fibers were fully covered by NiO platelets which possibly provide efficient transport of electrolyte, enhancing the capacitance.

Estilos ABNT, Harvard, Vancouver, APA, etc.

12

Liu, Chang Jiu, Chun Xiao Xing e Shi Juan Chen. "Study on the Performance of Amorphous Nickel Hydroxide Codoped with Ce and Fe". Materials Science Forum 694 (julho de 2011): 718–22. http://dx.doi.org/10.4028/www.scientific.net/msf.694.718.

Texto completo da fonte

Resumo:

Amorphous nickel hydroxide powders codoped with Ce and Fe were synthesized by the combined chemical precipitation and rapid freezing method. The microstructure and chemical composition of the samples was characterized by XRD,SAED and EDS. The electrochemical performance of the prepared samples was analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge-discharge tests. The results showed that this amorphous nickel hydroxide codoped with Ce and Fe had more structural defects than those of Fe singly doped amorphous nickel hydroxide. These abundant structural defects with Ce and Fe codoped amorphous nickel hydroxide increased the thermal stability, decreased the charge transfer resistance, inhibited oxygen evolution reaction effectively and improved the electrochemical reversibility of the amorphous nickel hydroxide electrode.

Estilos ABNT, Harvard, Vancouver, APA, etc.

13

Rong, Wen, Sarah Stepan e Rodney D. L. Smith. "Evidence of Variations in Atomic Distribution in Disordered Mixed Metal Hydroxides". MRS Advances 4, n.º 33-34 (2019): 1843–50. http://dx.doi.org/10.1557/adv.2019.325.

Texto completo da fonte

Resumo:

ABSTRACTNumerous fabrication protocols are known to yield transition metal oxides with structures related to layered double hydroxides, but the effect of fabrication protocol on the uniformity of mixed-metal compositions remain largely unexplored. We have analysed the apparent solubility limits and the structural implications of iron ions in nickel hydroxide lattices for materials prepared by four different fabrication protocols. Opposing shifts in the (100) and (001) reflection in powder X-ray diffraction results revealed a contraction of the nickel lattice upon successful incorporation of iron, with Ni-M distances exhibiting an apparently linear decrease with respect to iron content. This feature revealed the amount of iron incorporated into nickel-based materials to be dependent on fabrication protocol, varying from apparently negligible concentrations to over fifty atomic percent. The dependency of structure on fabrication protocols provides a handle to improve fundamental understanding of catalytically relevant coordination environments.

Estilos ABNT, Harvard, Vancouver, APA, etc.

14

Liu, Chang Jiu, Shi Juan Chen, Dan Ma e Yan Wei Li. "Synthesis and Electrochemical Performance of Amorphous Nickel Hydroxide Codoped with Fe³⁺ and PO₄^3-". Advanced Materials Research 197-198 (fevereiro de 2011): 1285–88. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.1285.

Texto completo da fonte

Resumo:

Amorphous nickel hydroxide powder codoped with Fe3+ and PO43- was synthesized by micro-emulsion precipitation method combined with rapid freezing technique. The microstructures of the prepared samples were characterized by XRD, SEM, EDS, and Raman spectra. The electrochemical performance of the prepared samples was analyzed by cyclic voltammetry, electrochemical impedance spectroscopy, and charge-discharge tests. The results showed that this amorphous nickel hydroxide codoped with Fe3+ and PO43- resulted in more structural defects within the nickel hydroxide. The Fe3+ and PO43- codoping could increase the specific discharge capacity and improve the electrochemical reversibility of the amorphous nickel hydroxide.

Estilos ABNT, Harvard, Vancouver, APA, etc.

15

Ash, Baladev, Venkata Swamy Nalajala, Ashok Kumar Popuri, Tondepu Subbaiah e Manickam Minakshi. "Perspectives on Nickel Hydroxide Electrodes Suitable for Rechargeable Batteries: Electrolytic vs. Chemical Synthesis Routes". Nanomaterials 10, n.º 9 (19 de setembro de 2020): 1878. http://dx.doi.org/10.3390/nano10091878.

Texto completo da fonte

Resumo:

A significant amount of work on electrochemical energy storage focuses mainly on current lithium-ion systems with the key markets being portable and transportation applications. There is a great demand for storing higher capacity (mAh/g) and energy density (Wh/kg) of the electrode material for electronic and vehicle applications. However, for stationary applications, where weight is not as critical, nickel-metal hydride (Mi-MH) technologies can be considered with tolerance to deep discharge conditions. Nickel hydroxide has gained importance as it is used as the positive electrode in nickel-metal hydride and other rechargeable batteries such as Ni-Fe and Ni-Cd systems. Nickel hydroxide is manufactured industrially by chemical methods under controlled conditions. However, the electrochemical route is relatively better than the chemical counterpart. In the electrochemical route, a well-regulated OH− is generated at the cathode forming nickel hydroxide (Ni(OH)2) through controlling and optimizing the current density. It produces nickel hydroxide of better purity with an appropriate particle size, well-oriented morphology, structure, et cetera, and this approach is found to be environmentally friendly. The structures of the nickel hydroxide and its production technologies are presented. The mechanisms of product formation in both chemical and electrochemical preparation of nickel hydroxide have been presented along with the feasibility of producing pure nickel hydroxide in this review. An advanced Ni(OH)2-polymer embedded electrode has been reported in the literature but may not be suitable for scalable electrochemical methods. To the best of our knowledge, no such insights on the Ni(OH)2 synthesis route for battery applications has been presented in the literature.

Estilos ABNT, Harvard, Vancouver, APA, etc.

16

Wu, Xiao Feng, Yun Fa Chen, Qun Yan Li e L. Q. Wei. "Preparation and Characterization of Integral Hollow Microspheres of Nickel Hydroxide and Nickel Oxide". Solid State Phenomena 121-123 (março de 2007): 187–90. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.187.

Texto completo da fonte

Resumo:

Hollow microspheres of nickel hydroxide and nickel oxide were prepared with as-synthesized PS/Ni(OH)2 composite particles by sacrificing core method, respectively. The composite particles were synthesized by deposition of the Ni(OH)2 nanoflakelets formed by the hydrolysis of nickel nitrate onto the surfaces of polystyrene (PS) particles. The effects of different concentrations of nickel salt and urea on the deposition of the nanoflakelets of nickel hydroxide were studied. It was found that the uniform nanoflakelets were deposited on the polystyrene particles under the conditions of the 4╳10-3 M nickel salt and 0.667M urea. Compared with the directly calcinating of composite particles, Integral hollow microspheres of nickel hydroxide were attained by removal of cores of polystyrene in composite particles with toluene and NiO hollow microspheres by calcinating of these Ni(OH)2 hollow spheres in oven at 600°C for 2h.

Estilos ABNT, Harvard, Vancouver, APA, etc.

17

Ramesh, T. N., e P. Vishnu Kamath. "Planar defects in layered hydroxides: Simulation and structure refinement of β-nickel hydroxide". Materials Research Bulletin 43, n.º 12 (dezembro de 2008): 3227–33. http://dx.doi.org/10.1016/j.materresbull.2008.02.024.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

18

Yoshito, Walter Kenji, Valter Ussui, Dolores Ribeiro Ricci Lazar e José Octavio A. Pascoal. "Synthesis and Characterization of NiO-8YSZ Powders by Coprecipitation Route". Materials Science Forum 498-499 (novembro de 2005): 612–17. http://dx.doi.org/10.4028/www.scientific.net/msf.498-499.612.

Texto completo da fonte

Resumo:

Nickel oxide – 8 mol% yttria stabilized zirconia (NiO-8YSZ) powders containing 25 to 75 wt% of NiO were prepared by coprecipitation. The entire process includes the reaction of metals aqueous chloride solutions (heated at 95 oC) with ammonium hydroxide, washing steps of the resulting gel, butanol azeotropic distillation treatment to prevent the formation of hard agglomerates, drying, calcination and ball milling. The yield of precipitation of metals was determined by inductively coupled plasma atomic emission spectroscopy analysis (ICP-AES). Powders were characterized by X-ray and laser diffraction, infrared analysis, gas adsorption (BET) and scanning electron microscopy. It was observed that zirconium and yttrium hydroxides are easily precipitated in alkaline medium, while nickel precipitation yield is in the range of 80 to 95% due to the formation of soluble complexes. NiO appears as a second phase in synthesized powders and contributes to decreasing of specific surface area and agglomerate mean size.

Estilos ABNT, Harvard, Vancouver, APA, etc.

19

Hou, Xin Gang, Wen Wu Liu, Cai Xia Li e You Fu Wang. "Preparation and Study of Spherical Nickel Hydroxide Coated by Cobalt Oxy-Hydroxide". Advanced Materials Research 668 (março de 2013): 383–87. http://dx.doi.org/10.4028/www.scientific.net/amr.668.383.

Texto completo da fonte

Resumo:

Nanometer nickel hydroxide particles coated by cobalt oxy-hydroxide are prepared through chemical precipitation method. The properties of coated Ni(OH)2 particles is characterized by using X-ray diffraction, scanning electron microscopy, constant current charge/discharge test and cyclic voltammetry. Studies are focused on the effects of different amounts of cobalt oxy-hydroxide on structure and electrochemical characteristics of nickel hydroxide. The results show that a structure of β-Ni(OH)2 is preserved and 2.5 wt % CoOOH can form a well distributed conductive network on the surface of nickel hydroxide particles, thereby leading to higher utilization of active material; Compared to other electrodes, the electrodes with 2.5 wt % coated CoOOH show higher specific capacity and better cycling durability, and the electrodes also has better reversibility of the Ni(OH)2/NiOOH redox couple, and higher oxygen evolution potential.

Estilos ABNT, Harvard, Vancouver, APA, etc.

20

Liu, Chang Jiu, Mei Rong Qi e Chun Xiao Xing. "High-Temperature Performance of Amorphous Nickel Hydroxide Coated with La(OH)₃". Advanced Materials Research 311-313 (agosto de 2011): 1365–69. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1365.

Texto completo da fonte

Resumo:

La(OH)3coated amorphous nickel hydroxide was prepared by chemical coprecipitation method. The microstructure, surface morphology and chemical composition of the prepared sample were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). Electrochemical performances of the sample were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge/discharge measurements. The results demonstrated that the coating of La(OH)3 dramatically decreased electron transfer resistance and increased oxygen evolution potential of amorphous nickel hydroxide. Moreover, the high-temperature performance of amorphous nickel hydroxide was significantly improved after the coating of La(OH)3.

Estilos ABNT, Harvard, Vancouver, APA, etc.

21

Li, Chang Yu, Shou Xin Liu e Li Li Liu. "Preparation and Characterization of Flowerlike Nickel Oxide". Applied Mechanics and Materials 121-126 (outubro de 2011): 1044–48. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1044.

Texto completo da fonte

Resumo:

Flowerlike nickel oxide was synthesized by a simple liquid-phase process to obtain the hydroxide precursor and then calcined to form the nickel oxide. The precursor and the nickel oxide were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TG) , the scanning electron microscope(SEM) and Brunauer–Emmett–Teller-specific surface area measurement. The results indicated α-Nickel hydroxide was transferred to NiO with a cubic crystalline structure after being calcined at 450 °C; the NiO still kept the morphology of the precursors and the specific surface area of the NiO was 125.2m2/g.

Estilos ABNT, Harvard, Vancouver, APA, etc.

22

Chen, J., D. H. Bradhurst, S. X. Dou e H. K. Liu. "The effect of Zn(OH)2 addition on the electrode properties of nickel hydroxide electrodes". Journal of Materials Research 14, n.º 5 (maio de 1999): 1916–21. http://dx.doi.org/10.1557/jmr.1999.0257.

Texto completo da fonte

Resumo:

Nickel hydroxide powders currently used in the positive electrode of nickel-metal hydride (Ni–MH) batteries require cobalt or cobalt oxides to make them viable and attractive. As a step to eliminate the cobalt-containing materials, spherical nickel hydroxide powders coprecipitated with Zn(OH)2 were prepared by a spraying technique. These powders, which have a higher tapping density and a much smaller pore volume than conventional powders, were used as the active materials of nickel hydroxide electrodes. The effects of the Zn(OH)2 additions on the electrode properties, such as percentage utilization and cycle life, were studied, and the relationship between the electrode performance and the formation of γ–NiOOH was investigated. The cycle life was increased because there was less electrode swelling due to much reduced formation of γ–NiOOH.

Estilos ABNT, Harvard, Vancouver, APA, etc.

23

Jayashree, R. S., e P. Vishnu Kamath. "Modified Nickel Hydroxide Electrodes". Journal of The Electrochemical Society 149, n.º 6 (2002): A761. http://dx.doi.org/10.1149/1.1474428.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

24

Yudha, Cornelius Satria, Soraya Ulfa Muzayanha, Hendri Widiyandari, Ferry Iskandar, Wahyudi Sutopo e Agus Purwanto. "Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery". Energies 12, n.º 10 (17 de maio de 2019): 1886. http://dx.doi.org/10.3390/en12101886.

Texto completo da fonte

Resumo:

Nickel-rich cathode material, NCA (85:14:1), is successfully synthesized using two different, simple and economical batch methods, i.e., hydroxide co-precipitation (NCA-CP) and the hydroxides solid state reaction method (NCA-SS), followed by heat treatments. Based on the FTIR spectra, all precursor samples exhibit two functional groups of hydroxide and carbonate. The XRD patterns of NCA-CP and NCA-SS show a hexagonal layered structure (space group: R_3m), with no impurities detected. Based on the SEM images, the micro-sized particles exhibit a sphere-like shape with aggregates. The electrochemical performances of the samples were tested in a 18650-type full-cell battery using artificial graphite as the counter anode at the voltage range of 2.7–4.25 V. All samples have similar characteristics and electrochemical performances that are comparable to the commercial NCA battery, despite going through different synthesis routes. In conclusion, the overall results are considered good and have the potential to be adapted for commercialization.

Estilos ABNT, Harvard, Vancouver, APA, etc.

25

Wang, Qiushi, Yifu Zhang, Jinqiu Xiao, Hanmei Jiang, Xiaojuan Li e Changgong Meng. "A novel ordered hollow spherical nickel silicate–nickel hydroxide composite with two types of morphologies for enhanced electrochemical storage performance". Materials Chemistry Frontiers 3, n.º 10 (2019): 2090–101. http://dx.doi.org/10.1039/c9qm00392d.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

26

Kovalenko, Vadym, e Valerii Kotok. "Improvement of continuous technology of electrochemical synthesis of nickel hydroxide by implementation of solution recycling". Eastern-European Journal of Enterprise Technologies 1, n.º 6 (109) (10 de fevereiro de 2021): 30–38. http://dx.doi.org/10.15587/1729-4061.2021.224223.

Texto completo da fonte

Resumo:

Nickel hydroxide is widely used in supercapacitors, alkaline batteries, for the electrocatalytic oxidation of organic contaminants, etc. Due to their electrochemical activity, Ni(OH)2 (α+β) samples with a layer structure synthesized in a slit diaphragm electrolyzer are the most promising. To improve the continuous technology of electrochemical synthesis of nickel hydroxide, the possibility of recycling the spent catholyte containing sodium sulfate was determined. For this, samples of nickel hydroxide were synthesized from a solution of nickel sulfate in the presence of sodium sulfate with concentrations of 40, 60, 80, 100, and 120 g/L. The crystal structure of the samples was studied by X-ray phase analysis; the electrochemical properties were studied by the method of cyclic voltammetry. It was shown that the base sample obtained without the presence of sodium sulfate was a monophase layered (α+β) structure with a high content of α-modification. The crystallinity of the sample was not high. It was revealed that the presence of sodium sulfate led to a decrease in the crystallinity of nickel hydroxide due to an increase in the electrical conductivity of the solution and a decrease in the voltage in the electrolyzer. Cyclic voltramperometry showed that synthesis in a slit diaphragm electrolyzer in the presence of Na2SO4 (40–80 g/L) did not lead to a significant change in the electrochemical activity of nickel hydroxide samples. An increase in the concentration of sodium sulfate in the catholyte to 100–120 g/L led to an increase in electrochemical activity – the specific current of the discharge peak was 3.7–3.9 A/g (compared to 2.1 A/g for the reference sample).A comprehensive analysis of the characteristics of nickel hydroxide samples synthesized in the presence of sodium sulfate revealed the possibility and prospects of recycling the spent catholyte in a continuous technology for producing Ni(OH)2 in a slit diaphragm electrolyzer. It was revealed that when introducing recycling, it was recommended to maintain a high concentration of sodium sulfate (80–100 g/L)

Estilos ABNT, Harvard, Vancouver, APA, etc.

27

Liu, Chang Jiu, Wei Shang e Shi Juan Chen. "High-Temperature Electrochemical Performance of Amorphous Nickel Hydroxide Codoped with Y and Mg". Advanced Materials Research 554-556 (julho de 2012): 390–94. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.390.

Texto completo da fonte

Resumo:

Amorphous nickel hydroxide codoped with Y and Mg was synthesized by micro-emulsion precipitation method combined with rapid freezing technique. The physical properties and micro-structural features of the prepared sample were characterized and high-temperature electrochemical performance was analyzed by cyclic voltammetry and charge/discharge tests, respectively. The results indicate that this amorphous nickel hydroxide codoped with Y and Mg has more structural defects and better thermal stability, therefore results in a relatively high specific capacity(332.46 mAh•g-1 at a charge/discharge rate of 0.2C) and a high middle discharge voltage of 1.265V at 60°C. Moreover, the Y and Mg codoped amorphous nickel hydroxide exhibits good electrochemical reaction reversibility and structural stability.

Estilos ABNT, Harvard, Vancouver, APA, etc.

28

Tientong, Jeerapan, Stephanie Garcia, Casey R. Thurber e Teresa D. Golden. "Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction". Journal of Nanotechnology 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/193162.

Texto completo da fonte

Resumo:

Nickel nanopowders were synthesized by a chemical reduction of nickel ions with hydrazine hydrate at pH ~12.5. Sonication of the solutions created a temperature of 54–65°C to activate the reduction reaction of nickel nanoparticles. The solution pH affected the composition of the resulting nanoparticles. Nickel hydroxide nanoparticles were formed from an alkaline solution (pH~10) of nickel-hydrazine complexed by dropwise titration. X-ray diffraction of the powder and the analysis of the resulting Williamson-Hall plots revealed that the particle size of the powders ranged from 12 to 14 nm. Addition of polyvinylpyrrolidone into the synthesis decreased the nickel nanoparticle size to approximately 7 nm. Dynamic light scattering and scanning electron microscopy confirmed that the particles were in the nanometer range. The structure of the synthesized nickel and nickel hydroxide nanoparticles was identified by X-ray diffraction and Fourier transform infrared spectroscopy.

Estilos ABNT, Harvard, Vancouver, APA, etc.

29

Oliaee, Shirin Norooz, Changlin Zhang, Sang Youp Hwang, Harry M. Cheung e Zhenmeng Peng. "Synthesis and property of a Helwingia-structured nickel nitride/ nickel hydroxide nanocatalyst in hydrazine decomposition". RSC Advances 6, n.º 44 (2016): 38494–98. http://dx.doi.org/10.1039/c6ra03795j.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

30

Frolova, Liliya. "An investigation on the synthesis of nickel aluminate". Pigment & Resin Technology 48, n.º 6 (4 de novembro de 2019): 487–92. http://dx.doi.org/10.1108/prt-12-2018-0126.

Texto completo da fonte

Resumo:

Purpose The purpose of this paper is to study the process of coprecipitation of polyhydroxocomplexes of nickel and aluminum from solutions of nickel (Ni) (II) sulfate and aluminum (Al) (III) sulfate with caustic soda and to study the conversion process to nickel aluminate and to check its properties. Design/methodology/approach For the thermodynamic analysis of the precipitation process, the software package MEDUSA was used. The dependences of the electrical conductivity, pH and residual concentrations as functions of the OH/Me ratio were obtained. Using X-ray phase analysis, spectroscopic analysis and derivatographic analysis, the properties of the products obtained were studied. The effects of OH/Me ratio and molar ratio cation of reagents on the physicochemical properties of the products were analyzed. Findings The paper deals with the results of theoretical and experimental research on the synthesis pigments of blue and green colors based on Ni-Al spinel. The influence of the molar ratio cation content on optical and color characterise of pigments were studied. Originality/value The original complex method of studying the processes of co-precipitation of cations in the form of hydroxides is proposed. pH precipitation of aluminum hydroxide and nickel are different. It is interesting to study their co-precipitation. The resulting single-phase product is a precursor of nickel aluminate over a wide range of cation ratios. The dependences of the electrical conductivity, pH and residual concentrations as functions of the OH/Me ratio were obtained.

Estilos ABNT, Harvard, Vancouver, APA, etc.

31

Gu, Lin, Yewu Wang, Ren Lu, Liao Guan, Xinsheng Peng e Jian Sha. "Anodic electrodeposition of a porous nickel oxide–hydroxide film on passivated nickel foam for supercapacitors". J. Mater. Chem. A 2, n.º 20 (2014): 7161–64. http://dx.doi.org/10.1039/c4ta00205a.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

32

Cao, Jun, Zejie Zhang, Haichao Li, Ruitong Zhu, Songbo Li, Li Ma, Kechao Zhou, Qiuping Wei e Fenghua Luo. "Facile preparation of nickel hydroxide nanoplates on nickel foam for high performance hydrogen generation". Sustainable Energy & Fuels 4, n.º 10 (2020): 5031–35. http://dx.doi.org/10.1039/d0se00920b.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

33

Su, Xinruo, Changzhong Gao, Ming Cheng e Rongming Wang. "Controllable synthesis of Ni(OH)2/Co(OH)2 hollow nanohexagons wrapped in reduced graphene oxide for supercapacitors". RSC Advances 6, n.º 99 (2016): 97172–79. http://dx.doi.org/10.1039/c6ra20361b.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

34

Liu, Juan, Hui Ping Fan, Guo Zhuo Gong e Qiang Xie. "Influence of Surface Modification by Nitric Acid on Activated Carbon's Adsorption of Nickel Ions". Materials Science Forum 743-744 (janeiro de 2013): 545–50. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.545.

Texto completo da fonte

Resumo:

Four kinds of commercial activated carbons were soaked in sodium hydroxide after modification with 10% nitric acid. Nickel adsorption isotherms for modified activated carbons before and after sodium hydroxide treatment were tested. The surface groups were characterized by the Fourier transform infrared spectroscopy and Boehm titration, the adsorption properties were determined by the iodine number and methylene blue number, the pHIEP were deduced by the Zeta potential analyzer. The results showed that nitric acid blocks the pore, while enhances the content of acid groups, especially carboxyl resulting in the decrease of nickel adsorption capacity. After sodium hydroxide treatment, the nickel capacity of activated carbon from anthracite, long flame coal, lignite and coconut increased by 21.5%, 116%, 78.9%, 89.1% comparing with the virgin activated carbon, respectively. The overall research indicated that nickel ion adsorption capacity of activated carbon can be improved only when the acid groups are transferred into anion, and the modification is more effective on the activated carbon prepared by low metamorphic grade coal.

Estilos ABNT, Harvard, Vancouver, APA, etc.

35

Chang, Ya-Huei, Nga Yu Hau, Chang Liu, Yu-Ting Huang, Chien-Cheng Li, Kaimin Shih e Shien-Ping Feng. "A short-range ordered–disordered transition of a NiOOH/Ni(OH)2 pair induces switchable wettability". Nanoscale 6, n.º 24 (2014): 15309–15. http://dx.doi.org/10.1039/c4nr05261g.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

36

Qian, Zhongyu, Tao Peng, Liangti Qu, Jun Wang e Peng Wang. "Stepwise assembled nickel–cobalt-hydroxide hetero-accumulated nanocrystalline walls on reduced graphene oxide/nickel foams: an adjustable interface design for capacitive charge storage". J. Mater. Chem. A 2, n.º 14 (2014): 4894–98. http://dx.doi.org/10.1039/c3ta15072k.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

37

Yao, Changguang, Priyanka Chakraborty, Emanuele Aresu, Huaifeng Li, Chao Guan, Chunhui Zhou, Lan-Chang Liang e Kuo-Wei Huang. "Monomeric nickel hydroxide stabilized by a sterically demanding phosphorus–nitrogen PN3P-pincer ligand: synthesis, reactivity and catalysis". Dalton Transactions 47, n.º 45 (2018): 16057–65. http://dx.doi.org/10.1039/c8dt03403f.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

38

Szabados, Márton, Adél Anna Ádám, Zsolt Kása, Kornélia Baán, Róbert Mucsi, András Sápi, Zoltán Kónya, Ákos Kukovecz e Pál Sipos. "M(II)Al4 Type Layered Double Hydroxides—Preparation Using Mechanochemical Route, Structural Characterization and Catalytic Application". Materials 14, n.º 17 (27 de agosto de 2021): 4880. http://dx.doi.org/10.3390/ma14174880.

Texto completo da fonte

Resumo:

The synthesis of the copper-poor and aluminum-rich layered double hydroxides (LDHs) of the CuAl4 type was optimized in detail in this work, by applying an intense mechanochemical treatment to activate the gibbsite starting reagent. The phase-pure forms of these LDHs were prepared for the first time; using copper nitrate and perchlorate salts during the syntheses turned out to be the key to avoiding the formation of copper hydroxide sideproducts. Based on the use of the optimized syntheses parameters, the preparation of layered triple and multiple hydroxides was also attempted using Ni(II), Co(II), Zn(II) and even Mg(II) ions. These studies let us identify the relative positions of the incorporating cations in the well-known selectivity series as Ni2+ >> Cu2+ >> Zn2+ > Co2+ >> Mg2+. The solids formed were characterized by using powder X-ray diffractometry, UV–Vis diffuse reflectance spectroscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The catalytic potential of the samples was investigated in carbon monoxide oxidation reactions at atmospheric pressure, supported by an in situ diffuse reflectance infrared spectroscopy probe. All solids proved to be active and the combination of the nickel and cobalt incorporation (which resulted in a NiCoAl8 layered triple hydroxide) brought outstanding benefits regarding low-temperature oxidation and increased carbon monoxide conversion values.

Estilos ABNT, Harvard, Vancouver, APA, etc.

39

KURASHINA, MASASHI, AKIO EGUCHI, EIJI KANEZAKI, TAKUYA SHIGA e HIROKI OSHIO. "SYNTHESES AND PROPERTIES OF COBALT AND NICKEL HYDROXIDE NANOSHEETS". International Journal of Modern Physics B 24, n.º 15n16 (30 de junho de 2010): 2291–96. http://dx.doi.org/10.1142/s0217979210064812.

Texto completo da fonte

Resumo:

Nanosheets of cobalt and nickel hydroxides nanosheets were prepared by delamination of layered compounds, Co II( OH )1.73( DBS )0.27·0.87 H 2 O ( Co - DBS , DBS = dodecylbenzene sulfonate) and Ni II( OH )1.63( DBS )0.37·1.24 H 2 O ( Ni - DBS ), respectively. Powder X-ray diffraction analyses of the layered compounds revealed lattice parameters of a0 = 3.07 Å and c0 = 30 Å ( Co - DBS ) and a0 = 3.09 Å and c0 = 30 Å ( Ni - DBS ) in the hexagonal system. Dispersions of Co - DBS and Ni - DBS in 1-butanol produced colloidal solutions of nanosheets, [ Co - DBS ] delam and [ Ni - DBS ] delam , respectively. Poly(vinylpyrrolidone) ( PVP ) was dissolved in [ Co - DBS ] delam and [ Ni - DBS ] delam and the mixtures were dried to yield Co - PVP and Ni - PVP , respectively. These nanosheets measured 150-500 nm for [ Co - DBS ] delam and 135-400 nm for [ Ni - DBS ] delam by means of dynamic light scattering. Atomic force microscopy images showed lateral dimensions of 100-500 nm for [ Co - DBS ] delam and 50-100 nm for [ Ni - DBS ] delam . In the former image, the cobalt hydroxide nanosheets had a fairly flat terrace structure with thickness of 3.1-3.6 nm and with aspect ratios of 30-150, whereas in the latter image dome-like nanosheets of nickel hydroxide with height of 2.2-2.3 nm were confirmed. These nanosheets were regarded as monolayer. Magnetization experiments at 1.8 K showed hysteresis loops for Co - DBS , Co - PVP , Ni - DBS , and Ni - PVP .

Estilos ABNT, Harvard, Vancouver, APA, etc.

40

Czioska, Steffen, Jianying Wang, Xue Teng, Shangshang Zuo, Songhai Xie e Zuofeng Chen. "Hierarchically structured multi-shell nanotube arrays by self-assembly for efficient water oxidation". Nanoscale 10, n.º 6 (2018): 2887–93. http://dx.doi.org/10.1039/c7nr07695a.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

41

Saeed, Muhammad, Muhammad Asghar Jamal, Atta-ul Haq, Mohammad Ilyas, Mohammad Younas e Muhammad Azhar Shahzad. "Oxidative Degradation of Methylene Blue in Aqueous Medium Catalyzed by Lab Prepared Nickel Hydroxide". International Journal of Chemical Reactor Engineering 14, n.º 1 (1 de fevereiro de 2016): 45–51. http://dx.doi.org/10.1515/ijcre-2015-0088.

Texto completo da fonte

Resumo:

AbstractThis study explores the lab prepared nickel hydroxide catalyzed oxidative degradation of Methylene Blue (MB) in aqueous medium using batch reactor. Nickel hydroxide was prepared by reaction of sodium hypochlorite, sodium hydroxide and nickel sulphate hexahydrate in distilled water. The catalytic oxidative degradation of Methylene Blue was explored in terms of various parameters like effect of time, hydrogen peroxide, temperature, initial concentration of dye, catalyst dosage and effect of speed of agitation on degradation of Methylene Blue. Experimental data was subjected to kinetics analysis using Curve Expert software. Degradation reaction was taking place according to Langmuir-Hinshelwood mechanism. According to this mechanism the reactants adsorb at the surface of catalyst in first step followed by chemical reaction between adsorbed reactants in second step. Catalyst was heterogeneous in nature which was separated by simple filtration easily.

Estilos ABNT, Harvard, Vancouver, APA, etc.

42

Kim, Kyung Ho, Sena Motoyama, Yoshio Abe, Midori Kawamura e Takayuki Kiba. "Comparative Study on Morphological and Electrochemical Properties of Nickel–Cobalt Double Hydroxide, Cobalt Hydroxide, and Nickel Hydroxide". Journal of Electronic Materials 48, n.º 5 (23 de fevereiro de 2019): 3000–3005. http://dx.doi.org/10.1007/s11664-019-07051-7.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

43

Lei, Xiaodong, Bo Wang, Junfeng Liu, Zhengping Ye, Zheng Chang, Meihong Jiang e Xiaoming Sun. "Three-dimensional NiAl-mixed metal oxide film: preparation and capacitive deionization performances". RSC Adv. 4, n.º 78 (2014): 41642–48. http://dx.doi.org/10.1039/c4ra08415b.

Texto completo da fonte

Resumo:

A NiAl layered double hydroxide (NiAl-LDH) film was grown on the surface of a three-dimensional (3D) nickel foam by an in situ hydrothermal method using a nickel foam substrate as a nickel source, and boehmite (AlOOH) sol as an aluminium source.

Estilos ABNT, Harvard, Vancouver, APA, etc.

44

Zhao, Junhong, Junzhi He, Mengjun Sun, Meijiao Qu e Huan Pang. "Nickel hydroxide–nickel nanohybrids indirectly from coordination microfibers for high-performance supercapacitor electrodes". Inorganic Chemistry Frontiers 2, n.º 2 (2015): 129–35. http://dx.doi.org/10.1039/c4qi00145a.

Texto completo da fonte

Resumo:

Mesoporous nickel hydroxide–nickel nanohybrids are successfully obtained via oxidation of Ni nanowire foams indirectly from coordination microfibers, and are successfully applied as high-performance supercapacitor electrodes.

Estilos ABNT, Harvard, Vancouver, APA, etc.

45

Wei, Chengzhen, Huan Pang, Cheng Cheng, Junhong Zhao, Pengwei Li e Yongkang Zhang. "Mesoporous 3D ZnO–NiO architectures for high-performance supercapacitor electrode materials". CrystEngComm 16, n.º 20 (2014): 4169–75. http://dx.doi.org/10.1039/c3ce42567c.

Texto completo da fonte

Resumo:

3D ZnO–NiO mesoporous architectures were synthesized through annealing the zinc hydroxide carbonate–nickel hydroxide carbonate composite precursor, which was prepared via a one-pot hydrothermal route.

Estilos ABNT, Harvard, Vancouver, APA, etc.

46

Eslamibidgoli, Mohammad Javad, Axel Groß e Michael Eikerling. "Surface configuration and wettability of nickel(oxy)hydroxides: a first-principles investigation". Physical Chemistry Chemical Physics 19, n.º 34 (2017): 22659–69. http://dx.doi.org/10.1039/c7cp03396f.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

47

Chen, Li, Yan Ming Wang, Juan Liu e Xing Yao Wang. "A Novel Synthesis of Nanometer Spherical β-Ni(OH)₂ Cathode Materials with High Electrochemical Performances". Advanced Materials Research 936 (junho de 2014): 491–95. http://dx.doi.org/10.4028/www.scientific.net/amr.936.491.

Texto completo da fonte

Resumo:

A novel hydrothermal stripping technique synthesis route, in which the nickel-loaded organic phase of naphthenic acid was directly stripped by water at 140-240 °C for 2.0 h to recover nickel as hydroxide precipitates, has been firstly developed. The nickel hydroxide powders synthesized by this route was the spherical β-Ni(OH)2 and had a small particle size in the range of 20-100 nm shown by XRD and TEM test. The results of electrochemical performances show that the nanometer β-Ni(OH)2 cathode materials have much higher discharge specific capacity, excellent capacity retention and cycle performances.

Estilos ABNT, Harvard, Vancouver, APA, etc.

48

Bao, Jie, Yan Juan Zhu, Qing Sheng Xu, Yi Huan Zhuang, Ru Dong Zhao, Yan Yi Zeng e Hao Liang Zhong. "Structure and Electrochemical Performance of Cu and Al Codoped Nanometer α-Nickel Hydroxide". Advanced Materials Research 479-481 (fevereiro de 2012): 230–33. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.230.

Texto completo da fonte

Resumo:

Nanometer α-nickel hydroxide codoped with Cu and Al has been synthesized by the ultrasonic-assisted precipitation method. The crystal structure and particle size were analyzed by X-ray diffraction (XRD) and particle size distribution (PSD). The electrochemical performance of the samples was characterized by the charge/discharge test and cyclic voltammetry. The results of electrochemical tests demonstrated that the speciﬁc discharge capacity of Cu/Al codoped α-nickel hydroxide (330 mAh/g) is much higher than that of pure spherical nickel (240 mAh/g), and it exhibits a relatively good electrochemical reaction reversibility and large proton diffusion coefficient.

Estilos ABNT, Harvard, Vancouver, APA, etc.

49

He, Qun, Yangyang Wan, Hongliang Jiang, Ziwen Pan, Chuanqiang Wu, Mei Wang, Xiaojun Wu, Bangjiao Ye, Pulickel M. Ajayan e Li Song. "Nickel Vacancies Boost Reconstruction in Nickel Hydroxide Electrocatalyst". ACS Energy Letters 3, n.º 6 (17 de maio de 2018): 1373–80. http://dx.doi.org/10.1021/acsenergylett.8b00515.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

50

Liu, Shude, Ying Yin, Kwan San Hui, Kwun Nam Hui, Su Chan Lee e Seong Chan Jun. "Nickel hydroxide/chemical vapor deposition-grown graphene/nickel hydroxide/nickel foam hybrid electrode for high performance supercapacitors". Electrochimica Acta 297 (fevereiro de 2019): 479–87. http://dx.doi.org/10.1016/j.electacta.2018.11.070.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Artigos de revistas sobre o tema "Hydroxyde de nickel"

Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos