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Dissertations / Theses on the topic 'Li[Li0.2Co0.4Mn0.4]O2'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Wei, X., S. C. Zhang, X. X. Lu, and G. R. Liu. "Structure and Electrochemical Performance of Li[Li0.2Co0.4Mn0.4]O2 Cathode Material for Lithium Ion Battery by Co-precipitation Method." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35203.

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The nano-structured Li[Li0.2Co0.4Mn0.4]O2 cathode material is synthesized by a co-precipitation method. X-ray diffraction shows that the synthesized material has a hexagonal α-NaFeO2 type structure with a space group R-3m. Scanning electron microscopy and transmission electron microscopy images show the homogeneous distribution with 100-200 nm. X-ray photoelectron spectroscopy results indicate that the oxi-dation states of Co and Mn in Li[Li0.2Co0.4Mn0.4]O2 are present in trivalence and tetravalence, respectively. The charge-discharge curves and cycling performance are analyzed in detail. The

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2

Liu, Jia. "The O2 electrode performance in the Li-O2 battery." Doctoral thesis, Uppsala universitet, Strukturkemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-259589.

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Li-O2 batteries have been attracting increasing attention and R&D efforts as promising power sources for electric vehicles (EVs) due to their significantly higher theoretical energy densities compared to conventional Li-ion batteries. The research presented in this thesis covers the investigation of factors influencing the decomposition of Li2O2, the development of highly active electrocatalysts, and the design of low-cost and easy-operation binder-free O2 electrodes for Li-O2 batteries. Being the main technique, SR-PXD was used both as a continuous light source to advance the electrochemi

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3

Li, Chunmei. "Study of rechargeable aprotic Li-O2 batteries." Amiens, 2014. http://www.theses.fr/2014AMIE0111.

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Est-il possible d'augmenter la densité d'énergie des batteries au lithium pour apporter l'autonomie souhaitée pour les applications véhicules électriques, voire réseaux? Une note d'espoir peut effectivement provenir des systèmes métaux-air et plus spécialement du Lithium-air qui suscite aujourd'hui l'engouement des fabricants d'automobiles. Sur la base de calculs théoriques, la technologie Li-air pourrait fournir des densités d'énergie de 3500 Wh kg(-1), soit environ 15 fois plus que celles des accumulateurs à ions lithium. Cependant, pour rendre de tels systèmes opérationnels, de nombreux ver

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4

Gao, Xiangwen. "Soluble catalysts for aprotic Li-O2 batteries." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:c95ccd68-9273-46b0-98cb-19da2149fa3e.

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Aprotic lithium-air (O<sub>2</sub>) batteries have attracted significant interest due to their high theoretical specific energy. In an aprotic Li-O<sub>2</sub> cell, O<sub>2</sub> is reduced to form Li<sub>2</sub>O<sub>2</sub> on discharge and the process is reversed on charge. Li<sub>2</sub>O<sub>2</sub> is an insulating and insoluble solid, leading ultimately to poor cycling rates, low capacities and early cell death if it formed on the electrode surface. This is exacerbated by formation of Li2CO3 due to the cathode degradation with the presence of Li<sub>2</sub>O<sub>2</sub> surface film. I

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5

Torayev, Amangeldi. "Transport processes in porous Li-O2 battery electrodes." Thesis, Amiens, 2019. http://www.theses.fr/2019AMIE0016.

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Les batteries Li-O2 sont intéressantes grâce à leur capacité de décharge théorique élevée qui est de l'ordre de 1168 mAh/g et aussi au faible coût des matériaux constitutifs. Cette technique doit faire face à plusieurs défis tels que le stabilité, la faible capacité en pratique, la rate capabilité et la durée de vie. Dans la cadre de ma thèse, on se concentre sur les études de mécanismes de transport à l'intérieur des électrodes poreuses des batteries Li-O2. Le transport de l'oxygène joue un rôle crucial sur la performance de la batterie. Parmi les défis mentionnés, on peut en théorique amélio

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6

Chen, Yuhui. "Stability and recharging of aprotic Li-O₂ batteries." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/6350.

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Non-aqueous rechargeable lithium-air (O₂) batteries are receiving intense interest because of their high theoretical specific energy, which are several times greater than that of lithium-ion batteries. To achieve it, the highly reversible formation/decomposition of Li₂O₂ is required to occur in the cathode during cycling. Due to the reactivity of reduced O₂ species, the aprotic electrolyte and carbon electrode substrate would be attacked and then decomposed. The organic carbonate decomposed on discharge, forming C₃H₆(OCO₂Li)₂, Li₂CO₃, HCO₂Li, CH₃CO₂Li, CO₂ and H₂O. Part of these by-products de

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7

Lu, Xueyi. "Architectural Nanomembranes as Cathode Materials for Li-O2 Batteries." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-228120.

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Li-O2 batteries have attracted world-wide research interest as an appealing candidate for future energy supplies because they possess the highest energy density of any battery technology. However, such system still face some challenges for the practical application. One of the key issues is exploring highly efficient cathode materials for Li-O2 batteries. Here, a rolled-up technology associated with other physical or chemical methods are applied to prepare architectural nanomembranes for the cathode materials in Li-O2 batteries. The strain-release technology has recently proven to be an effici

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8

Wang, Diandian. "Ex situ X-Ray absorption study of Li-rich layered cathode material Li[Li0.2Mn0.56Ni0.16Co0.08]O2." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5773/.

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The Li-rich layered transition metal oxides (LLOs) Li2MnO3-LiMO2 (M=Mn, Co, Ni, etc.) have drawn considerable attention as cathode materials for rechargeable lithium batteries. They generate large reversible capacities but the fundamental reaction mechanism and structural perturbations during cycling remain controversial. In the present thesis, ex situ X-ray absorption spectroscopy (XAS) measurements were performed on Li[Li0.2Mn0.56Ni0.16Co0.08]O2 at different stage of charge during electrochemical oxidation/reduction. K-edge spectra of Co, Mn and Ni were recorded through a voltage range of 3.

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9

Blanchard, Rémi. "Redox shuttle and positive electrode protection for Li-O2 systems." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI098/document.

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Les travaux de cette thèse focalisent sur la résolution de deux problèmes majeurs des électrodes positives de systèmes Li-O2, dus à la nature du produit de décharge formé pendant la réaction de réduction de l'oxygène, en milieux Li+ : Lithium peroxyde (Li2O2). Le premier problème est lié au processus de formation de ce dernier (étapes successives de nucléation électrochimiques et de dismutation chimique d'un intermédiaire : le superoxide de lithium), qui conduit à la formation de très grosses particules de peroxyde lithium à la surface de l'électrode. Du fait de leurs taille et de leur résisti

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10

Liu, Zheng. "Synthesis and battery application of nanomaterials and the mechanism of O2 reduction in aprotic Li-O2 batteries." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/15694.

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Hunting for improved energy storage devices based on rechargeable Li-ion batteries and other advanced rechargeable batteries is one of the hottest topics in today's society. Both Li- ion batteries and Li-O2 batteries have been studied within the thesis. The research work of this thesis contains two different parts. Part 1. The controlled synthesis of the extreme small sized nanoparticles and their application for Li-ion batteries; Part 2. The study of the O2 reduction mechanism in Li-O2 batteries with aprotic electrolytes. In the first part, two different types of extremely small-sized TiO2 na

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11

Younesi, Reza. "Characterization of Reaction Products in the Li-O2 Battery Using Photoelectron Spectroscopy." Doctoral thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-183887.

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The rechargeable Li-O2 battery has attracted interest due to its high theoretical energy density (about 10 times better than today’s Li-ion batteries). In this PhD thesis the cycling instability of the Li-O2 battery has been studied. Degradation of the battery has been followed by studying the interface between the electrodes and electrolyte and determining the chemical composition and quantity of degradation products formed after varied cycling conditions. For this in-house and synchrotron based Photoelectron Spectroscopy (PES) were used as a powerful surface sensitive technique. Using these

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12

Rozenbeek, Erik. "Surface reactivity of ultrathin atomic layer deposited Al2O3 on Li[Ni0.8Mn0.1Co0.1]O2." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-416702.

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The nickel-rich cathode material Li[Ni0.8Mn0.1Co0.1]O2 is a much sought after material in Li-ion batteries for the future of electric vehicles due to its high specific capacity. However, it exhibits fast degradation during its use due to the interaction between the electrolyte and the cathode surface leading to capacity loss. In this thesis, the surface interaction of pristine and alumina coated NMC811, and NiO powder with electrolyte was investigated to observe difference in surface reactivity and if hydroxide groups on the surface could be a potential culprit in degradation. Thermogravimetri

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13

Schied, Thomas [Verfasser]. "Zum Sauerstoff-Transport in Li-O2-Zellen : Eine Computermodell-unterstützte Experimentalstudie / Thomas Schied." Aachen : Shaker, 2015. http://d-nb.info/1075437326/34.

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14

Zhu, Lihua [Verfasser], and H. [Akademischer Betreuer] Ehrenberg. "Exploring the Effects of Catalysts in Li-O2 Batteries / Lihua Zhu ; Betreuer: H. Ehrenberg." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1201415276/34.

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15

Khetan, Abhishek Verfasser], Heinz Günter [Akademischer Betreuer] [Pitsch, and Ulrich [Akademischer Betreuer] Simon. "Elucidation of electrolyte behaviour in Li-O2 batteries / Abhishek Khetan ; Heinz Pitsch, Ulrich Simon." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1161412719/34.

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Khetan, Abhishek [Verfasser], Heinz Günter [Akademischer Betreuer] Pitsch, and Ulrich [Akademischer Betreuer] Simon. "Elucidation of electrolyte behaviour in Li-O2 batteries / Abhishek Khetan ; Heinz Pitsch, Ulrich Simon." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1161412719/34.

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17

Schwenke, Uta [Verfasser]. "Analysis of electrolyte stability and the effect of contaminants in aprotic Li-O2 cells / Uta Schwenke." München : Verlag Dr. Hut, 2016. http://d-nb.info/1106592697/34.

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18

Chen, Yu-Ming. "The Fabrication of Advanced Electrochemical Energy Storage Devices With the integration of Ordered Nanomaterial Electrodes." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron148553322128565.

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19

Riekehr, Lars [Verfasser], Hans-Joachim [Akademischer Betreuer] Kleebe, and Helmut [Akademischer Betreuer] Ehrenberg. "Degradation von Li-reichen xLi2MnO3:(1-x)Li(Ni1/3Co1/3Mn1/3)O2 Nanokompositen als Aktivmaterial für Lithium-Ionen Batterien / Lars Riekehr. Betreuer: Hans-Joachim Kleebe ; Helmut Ehrenberg." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2016. http://d-nb.info/1112333002/34.

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20

Vicente, Agut Nuria. "Design, Synthesis, and Characterization of New Generation Lithium Batteries." Doctoral thesis, Universitat Jaume I, 2019. http://hdl.handle.net/10803/667098.

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In the last years, Li-ion batteries received great attention because of the increasing energetics requirements of modern society across a broad range of applications. We need to switch to renewable source energy and be able to storage it. Hence, modern electrochemistry faces a great challenge in developing rechargeable batteries whose materials meet the requirement for excellent features, as very prolonged stability and cycle life, safe, low cost, abundant as possible and ecofriendly. erein, different materials are characterized electrochemically: LiFePO4 anode, Li-O2 batteries and the innova

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21

Meini, Stefano [Verfasser]. "The Influence of Irreversible Electrochemical Reactions on the Fundamental Mechanisms Governing Capacity and Cycle Life of Li-O2 Batteries / Stefano Meini." München : Verlag Dr. Hut, 2013. http://d-nb.info/1042878412/34.

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22

Lu, Xueyi [Verfasser], Oliver G. [Akademischer Betreuer] Schmidt, Oliver G. [Gutachter] Schmidt, and Chenglin [Gutachter] Yan. "Architectural Nanomembranes as Cathode Materials for Li-O2 Batteries / Xueyi Lu ; Gutachter: Oliver G. Schmidt, Chenglin Yan ; Betreuer: Oliver G. Schmidt." Chemnitz : Universitätsbibliothek Chemnitz, 2017. http://d-nb.info/1214306683/34.

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23

Iliksu, Merve Verfasser], Dirk Uwe [Akademischer Betreuer] [Sauer, and Heinz Günter [Akademischer Betreuer] Pitsch. "Elucidation and comparison of the effects of lithium salts on discharge chemistry of nonaqueous li-O2 Batteries / Merve Iliksu ; Dirk Uwe Sauer, Heinz Günter Pitsch." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1171323832/34.

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Iliksu, Merve [Verfasser], Dirk Uwe [Akademischer Betreuer] Sauer, and Heinz Günter [Akademischer Betreuer] Pitsch. "Elucidation and comparison of the effects of lithium salts on discharge chemistry of nonaqueous li-O2 Batteries / Merve Iliksu ; Dirk Uwe Sauer, Heinz Günter Pitsch." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1171323832/34.

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25

Meini, Stefano [Verfasser], Hubert [Akademischer Betreuer] Gasteiger, Tom [Akademischer Betreuer] Nilges, and Kai-Olaf [Akademischer Betreuer] Hinrichsen. "The Influence of Irreversible Electrochemical Reactions on the Fundamental Mechanisms Governing Capacity and Cycle Life of Li-O2 Batteries / Stefano Meini. Gutachter: Hubert Gasteiger ; Tom Nilges ; Kai-Olaf Hinrichsen. Betreuer: Hubert Gasteiger." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1038787106/34.

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26

Levasseur, Stéphane. "Contribution à l'étude des phases Lix(Co,M)O2 en tant que matériaux d'électrode positive des batteries Li-ion : Effets combinés de la surstoechiométrie en lithium et de la substitution (M=Ni,Mg)." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2001. http://tel.archives-ouvertes.fr/tel-00003507.

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Des matériaux d'électrode positive pour batteries Li-ion de formule Lix0(Co,M)O2 (M = Ni, Mg ; x0 ≥ 1.0) ont été préparés à haute température (900° C) et caractérisés par diffraction des rayons X, tests galvanostatiques, spectroscopie de RMN MAS du 7Li et mesures électriques. Alors que les propriétés de la phase LiCoO2 sont en accord avec la littérature, dans tous les cas, l'ajout d'un excès de lithium lors de la synthèse conduit dans le matériau final à la présence d'un défaut structural constitué de lacunes d'oxygène et d'ions Co3+ spin intermédiaire (Co3+(IS)) en site pyramidal à base carré

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Chamaani, Amir. "Hybrid Polymer Electrolyte for Lithium-Oxygen Battery Application." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3562.

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The transition from fossil fuels to renewable resources has created more demand for energy storage devices. Lithium-oxygen (Li-O2) batteries have attracted much attention due to their high theoretical energy densities. They, however, are still in their infancy and several fundamental challenges remain to be addressed. Advanced analytical techniques have revealed that all components of a Li-O2 battery undergo undesirable degradation during discharge/charge cycling, contributing to reduced cyclability. Despite many attempts to minimize the anode and cathode degradation, the electrolyte remains a

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Kumar, Surender. "Electrochemical Investigations Related to High Energy Li-O2 and Li-Ion Rechargeable Batteries." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/3839.

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A galvanic cell converts chemical energy into electrical energy. Devices that carry out these conversions are called batteries. In batteries, generally the chemical components are contained within the device itself. If the reactants are supplied from an external source as they are consumed, the device is called a fuel cell. A fuel cell converts chemical energy into electrical energy as long as the chemicals are supplied from external reserves. The working principle of a metal-air battery involves the principles of both batteries and fuel cells. The anode of a metal-air cell is stored inside

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Kumar, Surender. "Electrochemical Investigations Related to High Energy Li-O2 and Li-Ion Rechargeable Batteries." Thesis, 2015. http://etd.iisc.ernet.in/2005/3839.

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A galvanic cell converts chemical energy into electrical energy. Devices that carry out these conversions are called batteries. In batteries, generally the chemical components are contained within the device itself. If the reactants are supplied from an external source as they are consumed, the device is called a fuel cell. A fuel cell converts chemical energy into electrical energy as long as the chemicals are supplied from external reserves. The working principle of a metal-air battery involves the principles of both batteries and fuel cells. The anode of a metal-air cell is stored inside th

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Indris, Sylvio. "Ion Dynamics in Solid Electrolytes: Li+, Na+, O2−, H+." 2017. https://ul.qucosa.de/id/qucosa%3A31578.

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31

Chang, Chieh-Han, and 張傑涵. "Fading Mechanism of Li(Ni0.5Mn0.3Co0.2)O2/MCMB Lithium Ion Battery." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/29103485463752875329.

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碩士<br>大同大學<br>化學工程學系(所)<br>104<br>Fading mechanism of Li(Ni0.5Mn0.3Co0.2)O2/MCMB lithium ion battery has been studied. Cells of three anode/cathode loading ratios (A/C ratio), 0.9, 1.1 and 1.3, were prepared and age-tested for 200 charge/discharge cycles at three c-rates, 0.2, 0.5 and 1.0C. Experimental results show that with the increasing number of cycles, the capacity of charge and discharge decreases and the internal resistance of the cell increases. Results of incremental capacity analysis (ICA) show that the peaks of charge shift toward the higher voltage side with increasing number

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Nikolowski, Kristian Mathis. "In situ Strukturuntersuchungen an Li(Ni,Co)O2 als Kathodenmaterial für Lithiumionenbatterien." Phd thesis, 2007. https://tuprints.ulb.tu-darmstadt.de/865/1/k_nikolowski_1.pdf.

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Diese Arbeit steht im Kontext der strukturellen Charakterisierung der Oxide mit Schichtstruktur mit der Summenformel LiNi1-yCoyO2, die als Kathodenmaterialien in Lithiumionen-Batterien eingesetzt werden. Um diese Materialien in Abhängigkeit vom Ladestand und in Abhängigkeit von der Zyklenzahl charakterisieren zu können, wurde ein experimenteller Aufbau für in situ-Strukturuntersuchungen mit Synchrotronstrahlung entwickelt und sukzessiv optimiert. Mit diesem Aufbau wurden die Gitterparameter sowie die Phasenabfolge von LixNi1-yCoyO2 bei der Lithium Aus- und Einlagerung untersucht. Wenn der Lith

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Riekehr, Lars. "Degradation von Li-reichen xLi2MnO3:(1-x)Li(Ni1/3Co1/3Mn1/3)O2 Nanokompositen als Aktivmaterial für Lithium-Ionen Batterien." Phd thesis, 2016. https://tuprints.ulb.tu-darmstadt.de/5581/1/Dissertation_Lars_Riekehr_Final.pdf.

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Fünf verschiedene Li-reiche Nanokomposite vom Typ xLi2MnO3:(1-x)Li(Ni1/3Mn1/3Co1/3)O2 mit den Zusammensetzungen x = 0,3, x = 0,5 (drei verschiedene Proben) und x = 0,7 wurden elektrochemisch und strukturell charakterisiert. Die elektrochemische Charakterisierung fand über galvanostatische Messungen in Knopfzellen gegen Lithium bis zum 70. Zyklus statt. Die Strukturanalyse wurde an den verschiedenen Proben im pristinen (unzyklierten) und formierten (nach erstem Zyklus) Zustand durchgeführt und jeweils nach fünf und nach 70 Zyklen. Die Nanokompositstruktur wurde über transmissionselektronenmikro

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Yi-TingLin and 林怡亭. "Effect of Carbonate and Spinel Surface Modification on Structure and Electrochemical Performance of Li-rich Layered Oxide Li[Li0.2Ni0.2Mn0.6]O2." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/jygf9b.

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Yang, Jin-Jia, and 楊晉嘉. "Electrochemical Deposition of NiCo2O4 on Au-Covered Ni Foam as Cathode of Li-O2 Battery." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/25095835549069022121.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>104<br>Li-O2 batteries have been attracting increasing attention in recent years owing to its extremely high specific energy density. The critical challenge of Li-O2 battery is the relatively low activity of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) which occur at the cathode. In this work, electrodes were fabricated via electroplating NiCo2O4 on the Au-covered Ni foam and employed as the cathode of the Li-O2 batteries. As a result, the electrode possessed a remarkably high capacity of 7800 mAh g-1 at a current density of 100 mA g-1, and e

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Chen, Yu-Hsiang, and 陳昱翔. "Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/n4py3z.

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碩士<br>國立臺北科技大學<br>機械工程系機電整合碩士班<br>106<br>Li-ion battery plays a significant role in portable electronic devices in the running world. However, its capacity and energy density are still insufficient to provide battery for mainstream electric vehicles in the future. Li-oxygen (Li-O2) battery fulfills these energy requirements. However, the overpotential and stability still need to be improved. Hence, we developed a photocathode nanocomposite material composed of Cadmium Selenide/Zinc Sulfide Quantum Dots with Carbon Nanotube (CdSe/ZnS QDs@CNT) for an efficient and tunable performance of the phot

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Nikolowski, Kristian Mathis [Verfasser]. "In-situ-Strukturuntersuchungen an Li(Ni,Co)O2 als Kathodenmaterial für Lithiumionenbatterien / von Kristian Mathis Nikolowski." 2007. http://d-nb.info/985480645/34.

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CHENG, MENG-HUAN, and 鄭孟桓. "Using Rotating Ring-Disk Electrode to Study the Stability of Organic Solvents in Li-O2 Battery Electrolytes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/14204751332752515397.

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碩士<br>國立高雄大學<br>應用化學系碩士班<br>105<br>Lithium-Oxygen Battery (Li-O2 battery) is attractive due to its huge theoretical energy density (~11000 W/hr), but there are still some obstacles to be overcome. One of the problems is that the electrolyte is not stable and may decompose during discharging/charging process. To realize and to solve this problem, we use rotating ring disk electrode voltammetry (RRDEs) to study the reactions and to quantify the stability of the electrolyte by calculating the oxygen reaction rate constant(kf) and the electrolyte decomposition rate constant(k). Our results confirm

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Tsai, Yu-Lin, and 蔡裕林. "Electrochemical Deposition of MnO2 Nanosheets Covered Au Nanothorns on Carbon Fiber as Cathode for Li-O2 Battery." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/30031259721539264046.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>102<br>Li-O2 battery has attracted considerable attention owing to its extremely high specific energy density. To advance its performance, MnO2 has been recently employed in Li-O2 battery because of its oxygen catalytic reactivity, high abundance, low cost and environmental friendliness. In this study, electrodes were fabricated via electrochemical deposition to grow MnO2 nanosheets (NSs) on Au nanothorns (NTs) at carbon fiber (CF/Au NTs/MnO2 NSs). As a result, cathode using such step had a capacity of ~3000 mAh g-1 at a current density of 100 mA g-1, and exhibited

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Lin, Yu-chu, and 林祐助. "The Effects of Co-precipitation Process on the Properties of Li(Ni1/3Co1/3Mn1/3)O2 Cathode Materials." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/80502615722558042486.

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碩士<br>大同大學<br>材料工程學系(所)<br>94<br>Layered Li(Ni1/3Co1/3Mn1/3)O2 cathode materials were prepared with co-precipitation method followed by heat-treatment at temperatures between 800 and 1000oC. The characterization and electrochemical properties of the prepared powders were studied with XRD, SEM, and capacity retention study. In order to improve the cycleability and rate capability of Li(Ni1/3Co1/3Mn1/3)O2 cathode material, amended co-precipitation methods with addition of acetylene black in precursor for heat-treatment and addition of PEG or sucrose into transition metal ion solution before co-p

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chu, Lin yu, and 林祐助. "The effect of co-precipitation process on the properties of Li(Ni1/3Co1/3Mn1/3)O2 cathode materials." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/41546173331182870728.

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碩士<br>大同大學<br>材料工程研究所<br>95<br>Layered Li(Ni1/3Co1/3Mn1/3)O2 cathode materials were prepared with co-precipitation method followed by heat-treatment at temperatures between 800 and 1000oC. The characterization and electrochemical properties of the prepared powders were studied with XRD, SEM, and capacity retention study. In order to improve the cycleability and rate capability of Li(Ni1/3Co1/3Mn1/3)O2 cathode material, amended co-precipitation methods with addition of acetylene black in precursor for heat-treatment and addition of PEG or sucrose into transition metal ion solution before co-pre

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Yang, Hong-kai, and 楊宏凱. "Using rotating ring disk electrode to study the electrochemical performance of Mn3O4 particle in rechargeable Li-O2 batteries." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/46407212683052596229.

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碩士<br>國立高雄大學<br>應用化學系碩士班<br>103<br>In recent years, Li-O2 batteries are much attractive because of the huge theoretical energy density close to fossil fuels. The disadvantage of Li-O2 battery is high overpotential between charge and discharge. That will cause the decomposition of the electrolyte, and poor efficiency of the cycle life. The application of catalysts can effectively decrease the Li−O2 recharge potential. In this study, we use the surfactant and manganese sulfate as a precursor solution, and to preparing Mn3O4 particles by using ultrasonic atomization as a catalyst using in the Li-

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WEI, CHAO-NAN, and 魏兆男. "Li-O2 Battery Based On Perovskite La0.5Ce0.5Fe0.5Mn0.5O3 Bifunctional Catalyst And Electrospinning PVDF/PET/PVDF Nanofiber Non-woven Membrane." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/48zvjw.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>106<br>In this work, we focus on the studies of the perovskite La0.5Ce0.5Fe0.5Mn0.5O3 (denoted as LCFMO) bifunctional catalyst and electrospinning PVDF/PET/PVDF (denoted as PVDF/PET/PVDF) polymer nanofiber non-woven separator. Regarding to the bifunctional catalyst, we used different precipitants to carry out the coprecipitation preparation method and calcined at different temperatures to synthesize perovskite LCFMO catalysts, and then mix with double carbon materials of graphene (GNS) and carbon black (Ketjen black, KB) to form the cathode slurry for lithium-oxygen

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GIACCO, DANIELA. "Design of Li-O2 cells and study of the electrodes reactivity by means of a multi-technique approach." Doctoral thesis, 2018. http://hdl.handle.net/11573/1209688.

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The PhD thesis work has been focused on aprotic Li-O2 cells assembled with different cathode materials in combination with the ether-based LiTFSI/TEGDME electrolyte. The performance of these promising energy storage systems have been investigated and related to the electrochemical and chemical processes at the triple O2/cathode/electrolyte interface and to the peculiar influence of each type of cathode material. These goals have been achieved by a powerful combination of techniques such as X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SE

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Tripathy, Debashis. "Studies on Mono- and Multi-valent Ion Storage Using Metal Phosphosulfide and Organic Carbonyl Compounds." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5927.

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The present study describes the results on inorganic and organic materials for energy storage and sensors. It contains eight chapters including introduction, experimental and summary sections. The first chapter gives a brief overview of energy storage systems, progress and challenges associated with them along with a few possible solutions to tackle them. The second chapter explains all the experimental details like chemicals used, syntheses procedures, instruments used, and various processes and procedures used in this work. The third chapter demonstrates the ion storage performanc

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