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New gel electrolytes based on copolymers for electrochemical power sources
Peterová, Soňa ; Sedlaříková, Marie (referee) ; Veselkova, Iuliia (advisor)
This thesis deals with description of preparation and use of monomers and copolymers for gel polymer electrolytes usable in electrochemical power sources. This thesis is divided in theoretical and experimental part. The theoretical part describes electrolytes focused on gel polymer electrolytes, measuring methods and materials used for experiments. The experimental part deals with calculation of composition of polymer electrolytes, method of preparation and evaluation of measured results. The method of applying GPE to a negative LTO electrode and a positive NMC electrode is described too. Linear Sweep Voltammetry (LSV) and Potentiostatic Electrochemical Impedance Spectroscopy (PEIS), Cyclic Voltammetry (CV) and Galvanostatic Cycling with Potential Limitation (GCPL) were chosen for measurement of properties.
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Gel aprotic electrolytes with tetraalkylamonium salts
Michalec, Juraj ; Veselkova, Iuliia (referee) ; Sedlaříková, Marie (advisor)
The essence of this graduate thesis is to summarize knowledge about the aprotic gel electrolytes. In the graduate thesis, there are explained methods for mensuration electrochemical properties of the aprotic gel electrolytes. In the theoretical part, I focus on the knowledge related to gel polymeric electrolytes, their history, properties, mechanisms and application. In the experimental part, I describe the preparation of the samples of the gel polymeric electrolytes, in which I evaluate their properties, electrical conductivity and potencial window.
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Gel polymer electrolytes with fire retardands
Veselkova, Iuliia ; Jahn, Michal (referee) ; Sedlaříková, Marie (advisor)
This graduate work deals with the study and preparation of gel polymer electrolytes with flame retardants for lithium-ion batteries. The theoretical part describes the types of electrolytes, their features, benefits, how they differ and where they are used in detail. The basis of this section is gel electrolytes with flame retardants, to measure their electrical and electrochemical properties. The experimental part deals with the preparation of samples of gel electrolytes with different percentages of flame retardant, where varied species of flame retardants and measuring their electrical conductivity and potential windows. Impedance spectroscopy, cyclic voltammetry and dynamic-analytical thermal analysis were selected as measuring methods.
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The GDR and FRG olympic team at the Olympic games in Melbourne 1956
Veselková, Ivana ; Pešek, Jiří (advisor) ; Dimitrov, Michal (referee)
Diploma thesis "The GDR and FRG olympic team at the Olympic games in Melbourne in 1956" describes the process of making the united german team, which has begun in 1955 and which was . Thesis deals with the mutual negotiations of both olympic teams and also describes the goals, which the sport officials and politics were trying to reach during the whole process of making the united team. The next part of the thesis deals with the real experience with the united german team at the summer olympic games in Melbourne in 1956 and also tries to answer the question, whether in reality this united german team was not more or less just two autonomous teams, which only had a few visible symbolic things such as clothes and flag together.
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Gel Polymer Electrolytes Based On Ethylene Glycol Dimethacrylate And Their Electro-Chemical Characterization
Veselkova, Iuliia
The electrochemical properties of cross-linked gel polymer electrolyte based on ethyleneglycol dimethacrylate are investigated. Impedance spectroscopy was used for studying the mode ofelectrical conductivity in prepared gel electrolytes. A study of electrochemical stability was providedusing linear sweep voltammetry. The increasing amount of ethylene glycol dimethacrylateshows the decreasing of electrical conductivity. The presence of cross-linking agent affects not onlythe electrochemical properties but also the mechanical properties.
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Study Of Electrochemical Properties Of Gel Polymer Electrolyte Based On Tetraethyl Ammonium Salt
Veselkova, Iuliia
In this study, gel polymer electrolytes based on tetraethyl ammonium tetrafluoroborate salt (TEA BF4) were prepared by UV-light polymerization technique. The effect of adding TEA BF4 in different concentrations on electrochemical and mechanical properties were studied. Ionic conductivity and potential window were measured by impedance spectroscopy and linear voltammetry methods. The results indicate how salt concentration affects electrochemical properties of gel polymer electrolytes.
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Electrochemical Properties Of Gel Polymer Electrolytes Modified Flame Retardants
Veselkova, Iuliia
This paper deals with preparation of gel polymer electrolytes modified by flame retardants based on methyl methacrylate. The aim of this work was to investigate the effect of thermal polymerization method on electrochemical properties such as ionic conductivity and potential window of gel polymer electrolytes. For measuring electrochemical properties, impedance spectroscopic techniques and linear voltammetry were used. Results indicate the dependence of ionic conductivity on the amount of flame retardant.
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New gel electrolytes based on copolymers for electrochemical power sources
Peterová, Soňa ; Sedlaříková, Marie (referee) ; Veselkova, Iuliia (advisor)
This thesis deals with description of preparation and use of monomers and copolymers for gel polymer electrolytes usable in electrochemical power sources. This thesis is divided in theoretical and experimental part. The theoretical part describes electrolytes focused on gel polymer electrolytes, measuring methods and materials used for experiments. The experimental part deals with calculation of composition of polymer electrolytes, method of preparation and evaluation of measured results. The method of applying GPE to a negative LTO electrode and a positive NMC electrode is described too. Linear Sweep Voltammetry (LSV) and Potentiostatic Electrochemical Impedance Spectroscopy (PEIS), Cyclic Voltammetry (CV) and Galvanostatic Cycling with Potential Limitation (GCPL) were chosen for measurement of properties.
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Gel aprotic electrolytes with tetraalkylamonium salts
Michalec, Juraj ; Veselkova, Iuliia (referee) ; Sedlaříková, Marie (advisor)
The essence of this graduate thesis is to summarize knowledge about the aprotic gel electrolytes. In the graduate thesis, there are explained methods for mensuration electrochemical properties of the aprotic gel electrolytes. In the theoretical part, I focus on the knowledge related to gel polymeric electrolytes, their history, properties, mechanisms and application. In the experimental part, I describe the preparation of the samples of the gel polymeric electrolytes, in which I evaluate their properties, electrical conductivity and potencial window.
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