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Dissertations / Theses on the topic 'LiBH4'

Author: Grafiati

Published: 9 March 2023

Last updated: 19 July 2025

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1

Bösenberg, Ulrike Verfasser], and Rüdiger [Akademischer Betreuer] [Bormann. "LiBH4-MgH2 Composites for Hydrogen Storage : LiBH4-MgH2 Komposite für die Wasserstoffspeicherung / Ulrike Bösenberg ; Betreuer: Rüdiger Bormann." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2009. http://d-nb.info/1175884405/34.

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2

Rivera, Luis A. "Destabilization and characterization of LiBH4/MgH2 complex hydride for hydrogen storage." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0001984.

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3

Morin, François. "Effet de la pression et de l'addition de fer sur la désorption du système LIBH4 + MgH2." Thèse, Université du Québec à Trois-Rivières, 2012. http://depot-e.uqtr.ca/4464/1/030300172.pdf.

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4

Marizy, Adrien. "Super-hydrures sous pression pour le stockage de l’hydrogène et la supraconductivité : développement d’outils et résultats sur H3S, CrHx, LiBH4 et NaBHx." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX115/document.

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Récemment, sous des pressions de plusieurs gigapascals, de nouveaux hydrures ont été synthétisés avec des propriétés étonnantes potentiellement porteuses de ruptures technologiques pour le stockage de l’hydrogène ou la supraconductivité. Plusieurs superhydrures sont étudiés expérimentalement et simulés par DFT dans cette thèse. Les diagrammes de phases en pression de LiBH4 et NaBH4, deux composés d’intérêt pour le stockage de l’hydrogène, sont explorés par diffraction de rayons X, spectroscopie Raman et infrarouge jusqu’à des pressions de 300 GPa sans observer de décomposition. L’insertion d’h

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5

GHAANI, MOHAMMAD REZA. "Study of new materials and their functionality for hydrogen storage and other energy applications." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/49808.

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The first part of this thesis deals with hydrogen storage materials, in view of their applications as promising energy carriers. One of the main open problems with these materials is: how can their decomposition temperature be lowered, when hydrogen is wanted to be released, so as to improve the energy efficiency of the process. A possible answer is given by joint decomposition of two or more hydrides, if very stable mixed compounds are formed (‘hydride destabilization’). Aiming at this result, the new hydride composite 2LiBH4-Mg2FeH6 was considered, it was synthesized, and its thermodynamic a

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6

Šašek, Martin. "Charakterizace elektrolytů na bázi směsi iontová kapalina a aprotické rozpouštědlo." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318870.

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The thesis deals with liquid aprotic electrolytes based on mixtures of ionic liquid and solvent. EmimBF4, namely 1-ethyl-3-ethylimidazolium tetrafluoroborate, was used as the starting ionic liquid. A mixture of propylene carbonate, ethylene carbonate and dimethyl carbonate was used as solvents. Electrolytes were enriched with two electrolyte salts LiBF4 and NaBF4 from the resulting mixtures selected the most suitable electrolytes for Li-ion and Na-ion accumulators. Electrolytes were selected taking into account the required properties: the width of the potential window, the measured electrical

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7

Третьяков, Дмитро Олегович. "Фізико-хімічні властивості систем сіль літію (LiBF4, LiCIO4, LiNO3, LiSO3CF3, LiN(SO2CF3)2) - апротонний диполярний розчинник ((CH3)2SO2, (C2H5)2SO2,(CH3)2SO, C3H4O3, C8H18O4)". Дис. канд. хім. наук, Міжвідомче відділ. електрохім. енергетики Нац. акад. наук України, 2012.

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8

Lee, Jeremy J. "Fabrication and Characterizations of LAGP/PEO Composite Electrolytes for All Solid-State Lithium-Ion Batteries." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527273235003087.

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9

Cheng, Yi-Ting, and 鄭宜庭. "The Effect of Pd and Co Additives on the Enhancement of the Dehydrogenation Characteristics for LiBH4 and LiBH4+2LiNH2 systems." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/87727432772319427866.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>99<br>LiBH4 is a potential hydrogen storage material and gains lots of interests recently due to the extremely high hydrogen capacity (18.4 wt%). However, the initial decomposition temperature (Ti) and main dehydrogenation temperature (Tm) of LiBH4 are as high as 567 and 754 K, respectively. In order to overcome the drawbacks, there are several approaches developed to modify the system thermodynamically or kinetically. In this study, LiBH4 is modified by various additives or mixing with LiNH2 to form a new Li-B-N-H quaternary hydride by ball-milling process. Besid

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10

CHAN, CHEN-WEI, and 詹鎮瑋. "Computational Study on the Structuresof (LiBH4)n，n=1~12 Clusters forHydrogen Storage." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/41085857259458507073.

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碩士<br>中原大學<br>化學研究所<br>102<br>In the present study, we used density functional theory with B3LYP/6-311g++(d, p) method to calculate the structures, frequencies and energies of (LiBH4)n, n=1~12 clusters which has been known as a candidate hydrogen storage materials. We found that each cluster has several isomers. In order to enhance the hydrogen storage capacity of (LiBH4)n clusters, we added excess electrons to(LiBH4)n clusters. Our calculations show that the hydrogen storage capacity as well as the weight percent is improved with the existence of excess electrons. In addition, we also analyze

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11

Ciou, Jheng-ci, and 邱鉦琪. "Promotion of Dehydrogenation Characteristics for LiBH4 by Addition of PdNi(OH)x Catalysts." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/56590732064824469153.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>98<br>H2 is viewed as one of the promising clean fuels of the future. The H2 economy involves three important areas: production, storage, and use.Among them, developing effective H2 storage methods and materials for transportation is a key challenge for basic research and a crucial factor in achieving the H2 economy. LiBH4 is a potential H2 storage material owing to its high theoretical H2 capacity (18.5 wt% H2). In this study, the as-received LiBH4 is modified by Pd-Ni(OH)x additives and their dehydrogenation properties are investigated by a technique of temperat

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12

Gulino, Valerio. "LiBH4 as Solid-state Electrolyte for Li-ion Batteries: Modelling, Synthesis, Characterization and Application." Doctoral thesis, 2020. http://hdl.handle.net/2318/1788797.

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13

Chen, Wei-Chih, and 陳韋誌. "First-Principles Studies of Thermodynamic Properties and Dehydrogenation Processes of Hydrogen Storage Material (LiBH4)n Nanoclusters." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/93570751375375047601.

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碩士<br>國立中山大學<br>物理學系研究所<br>102<br>Several experimental studies have found improved thermodynamic, kinetic, and reversibility properties when LiBH4 is confined in nano-porous materials. In this study, we used Monte Carlo method and genetic algorithm to search the conformations of reactant (LiBH4)n and one of products (LiB)n. Other products, Lin, Bn, and Li2BnHn, were obtained from literatures. We used the density functional theory to calculate the total energies of reactants and all possible products, and found that the stability of LiBH4 nanoclusters have only little difference compared with t

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14

Hu, Zhe-yuan, and 胡哲源. "The Effects of Metal (Ce, Co and Sn) Chlorides and Oxides Additives on the Enhancement of the Dehydrogenation Characteristics for LiBH4." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/21242421357135946550.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>100<br>LiBH4 is a potential hydrogen storage material and gains lots of interests recently due to its extremely high hydrogen capacity (18.4 wt%). However, the initial decomposition (Ti) and main dehydrogenation temperatures (Tm) of LiBH4 are as high as 560 and 750 K, respectively. In order to overcome the drawbacks, several approaches have been developed to modify the system thermodynamically or kinetically. In this study, the effects of metal chlorides (CeCl3, CoCl2 and SnCl2), metal oxides (CeO2, CoO and SnO2), and carbon supported metal oxides (CeO2/C, CoO/C a

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15

Tsai, Jih-Wei, and 蔡日偉. "Molecular Simulations of the Conductivities for LiBF4、LiPF6 and LiBF4/ Trimethyl Phosphate in Propylene Carbonate." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/05525140194548522221.

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碩士<br>國立成功大學<br>化學系碩博士班<br>93<br>Molecular dynamics simulations have been used to study the diffusivity, conductivity, coordination and association properties for LiBF4 in Propylene carbonate (PC) and PC/Trimethyl phosphate (TMP) at 298 K. The results were compared with those of LiPF6-PC system. 　The simulated diffusion coefficients of Li+、F and H atoms agree with the NMR measurements. In addition, the computed specific conductivities have the same trend with experiment. It was shown that the high salt concentration facilitates the ion pair formation, but decreases the solvent coordination.

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16

Lin, Cheng-hsing, and 林政興. "Ionic conductivity of Poly(vinyl alcohol-co-ethylene glycol)/LiBF4." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/32143685278595413624.

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碩士<br>義守大學<br>生物技術與化學工程研究所碩士班<br>98<br>The ionic conductivity of poly(vinyl alcohol-co-ethylene glycol) (PVAEG) doped with lithium tetrafluoroborate (LiBF4) was studied. Experimental techniques such as X-ray diffraction (XRD) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy and optical microscopy were employed to characterize the film structure, while techniques such as dielectric spectroscopy and four point probe were used to study the ionic conductivity. The intensity of XRD peak decreased with increasing LiBF4 content. The optical microscopy study revealed that LIBF4 began to prec

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17

Yeh, Ze-Yi, and 葉則易. "Molecular Simulations of the Conductivities in EMIBF4 / LiBF4 Binary System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/89145736211026513852.

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碩士<br>國立成功大學<br>化學系碩博士班<br>94<br>Molecular dynamic simulation method has been employed to study the influences of the temperature（313, 343 K）and LiBF4 concentration（0, 1.0, 1.5, 2.0 M）on the ionic conductivity, coordination and association of the EMIBF4/LiBF4 binary system. The diffusion coefficients of the species H, F, Li＋ were computed firstly from the plot of the mean-squared displacement. With the aid of Nernst-Einstein equation and the calculated free ion probability, the specific conductivity of the system was estimated. The radial distribution functions were then analyzed to understand

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18

Chen, Hui-Lung, and 陳輝龍. "Molecular dynamics simulations of the conductivity for LiBF4 in mixed organic solvent." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/86850097524014310366.

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碩士<br>國立成功大學<br>化學系<br>89<br>Molecular dynamic simulation method has been used to study the conducting behavior of LiBF4 in diethyl carbonate(DEC)、propylene carbonate(PC) and their mixing solvent. The diffusion coefficient of lithium ion in the solution was computed firstly from its mean-square displacement. Utilizations were then made of the Nernst-Einstein equation to estimate the conductivity. The probability of finding free lithium ion was also calculated to revise the computed conductivity. The average numbers of solvent and anion around the lithium ion were also calculated from the plot

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19

Chen, Meng-Kai, and 陳孟概. "The study of lithium ion battery prepared by LiBF4 added polyacrylonitrile polymer electrolyte." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/81778943488267433974.

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碩士<br>國立中興大學<br>物理學系所<br>100<br>A battery is prepared using lithium as an anode electrode and lithium iron phosphate as a chathode electrode. The gelled polymer electrolyte is prepared by mixing LiBF4 lithium salts, polyacrylonitrile and ethylene carbonate. Ac impedance is employed to elucidate the lithium ion transport between the interfaces of electrolyte and electrodes. Cyclic voltammetry is used to study the electrochemical reaction of the battery. The charge/discharge property of the battery is explored by a multi-cell battery charger/discharger. The results indicate that, as the content

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20

Hsueh, Wen-Kai, and 薛文凱. "The study of lithium ion battery prepared by LiBF4 added Polyvinylidene fluoride polymer electrolyte." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/37011497771778616628.

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碩士<br>國立中興大學<br>物理學系所<br>100<br>In a lithium ion battery, suitable electrolyte can optimize the performance of the battery system. Using LiFePO4 as cathode material and lithium as the anode material, gel electrolyte samples, made of different ratios of PVDF、LiBF4、EC、PC mixtures, were investigated by conductingAC impedance and cyclic voltammetry. AC impedance results indicated that the conductivity of gel electrolytes increase with the rise of PVDF content ratio. Cyclic voltammetry(CV) diagrams showed both oxidation peak and reduction peak are single peaks and the peak voltages didn’t vary with

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21

Shen, Zheng-Xun, та 沈政勳. "Molecular dynamics simulations of the conductivities for LiN(SO2CF3)2 and LiBF4 in γ-butyrolactone". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/65693656362001602151.

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碩士<br>國立成功大學<br>化學系碩博士班<br>91<br>Molecular dynamics simulation has been applied to investigate the conducting behavior and salt-solvent interactions for LiBF4 and LiN(CF3SO2)2 (LiTFSI) in γ-butyrolactone (GBL). Simulations were performed at salt concentrations of 0.5, 1.0, and 1.5 M at 295 K, to mimic the experiment at conditions of the previous research conducted by Aihara et al. The simulated diffusion coefficients for Li+, anion, and solvent decrease with the increase of concentration, but the conductivities increases, due to the increasing number of conducting species. After revision

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