|
|
Negative electrode materials for lithium-ion batteries
Šikuda, Milan ; Vondrák, Jiří (referee) ; Libich, Jiří (advisor)
This theses deal with a study of basic functional principles of cells. It is focused on carbon materials, which are the basic for negative electrode masses of lithium-ion accumulators. The aim of this work is understanding principle lithium-ion accumulator, get an overview about the most widespread materials currently using for negative electrode materials with measuring their characteristics. Then compare characteristics of carbon materials with alternatives materials for negative electrode on the base of silicon. First part of the work is devoted of principle functionality lithium-ion accumulators together with description of galvanostatics and potentiostatics measuring methods. Practical part deals with preparation and measuring negative electrode masses characteristics.
|
|
|
Study of intercalation properties of electrode materials based on expanded graphite
Vencelides, Lukáš ; Máca, Josef (referee) ; Libich, Jiří (advisor)
The diploma thesis deals with the issue of electrochemical cells and deals in detail with lithium-ion batteries. The thesis describes the history of development of lithium-ion batteries, basic information about lithium and basic types of electrochemical cells. The work is devoted in detail to the description of characteristics and operating principle of lithium-ion batteries with emphasis on the negative electrode and negative electrode materials. Of the negative electrode materials, both the most widely used material graphite and modern materials with a great potential for the future are described. In the measurement methods the work describes methods CV, GCPL and EIS. Great emphasis is placed on the explanation of the principle of the function of electrochemical impedance spectroscopy and its application in measurement of electrochemical properties of materials used in lithium-ion batteries. There is also described the procedure of calculation of diffusion coefficients using the results of electrochemical impedance spectroscopy. In the practical part, two methods are used to calculate the diffusion coefficients of lithium ions into the negative electrode made of expanded flake graphite using the results of a series of electrochemical measurements.
|
|
|
Optimization of Electrode Preparation Technology for Lithium-Ion batteries
Zahálka, Patrik ; Máca, Josef (referee) ; Libich, Jiří (advisor)
This bachelor thesis deals with technological parameters of electrode production proces optimization for lithium-ion batteries. The thesis focuses on the negative electrode based on natural graphite. The first part presents a brief introduction to lithium-ion batteries and current status research. In the theoretical part the thesis focuses on the study of the structural and electrochemical properties of natural graphite and the operating principle of lithium-ion accumulator. The practical part solves optimization of electrode parameters, pressing pressure and electrode layer thickness. The capacitive and current characteristics of electrodes based on natural graphite have been analyzed and compared to the process parameters mentioned above.
|
|
|
Study of intercalation properties of electrode materials based on expanded graphite
Vencelides, Lukáš ; Máca, Josef (referee) ; Libich, Jiří (advisor)
The diploma thesis deals with the issue of electrochemical cells and deals in detail with lithium-ion batteries. The thesis describes the history of development of lithium-ion batteries, basic information about lithium and basic types of electrochemical cells. The work is devoted in detail to the description of characteristics and operating principle of lithium-ion batteries with emphasis on the negative electrode and negative electrode materials. Of the negative electrode materials, both the most widely used material graphite and modern materials with a great potential for the future are described. In the measurement methods the work describes methods CV, GCPL and EIS. Great emphasis is placed on the explanation of the principle of the function of electrochemical impedance spectroscopy and its application in measurement of electrochemical properties of materials used in lithium-ion batteries. There is also described the procedure of calculation of diffusion coefficients using the results of electrochemical impedance spectroscopy. In the practical part, two methods are used to calculate the diffusion coefficients of lithium ions into the negative electrode made of expanded flake graphite using the results of a series of electrochemical measurements.
|
|
|
Optimization of Electrode Preparation Technology for Lithium-Ion batteries
Zahálka, Patrik ; Máca, Josef (referee) ; Libich, Jiří (advisor)
This bachelor thesis deals with technological parameters of electrode production proces optimization for lithium-ion batteries. The thesis focuses on the negative electrode based on natural graphite. The first part presents a brief introduction to lithium-ion batteries and current status research. In the theoretical part the thesis focuses on the study of the structural and electrochemical properties of natural graphite and the operating principle of lithium-ion accumulator. The practical part solves optimization of electrode parameters, pressing pressure and electrode layer thickness. The capacitive and current characteristics of electrodes based on natural graphite have been analyzed and compared to the process parameters mentioned above.
|
|
|
Negative electrode materials for lithium-ion batteries
Šikuda, Milan ; Vondrák, Jiří (referee) ; Libich, Jiří (advisor)
This theses deal with a study of basic functional principles of cells. It is focused on carbon materials, which are the basic for negative electrode masses of lithium-ion accumulators. The aim of this work is understanding principle lithium-ion accumulator, get an overview about the most widespread materials currently using for negative electrode materials with measuring their characteristics. Then compare characteristics of carbon materials with alternatives materials for negative electrode on the base of silicon. First part of the work is devoted of principle functionality lithium-ion accumulators together with description of galvanostatics and potentiostatics measuring methods. Practical part deals with preparation and measuring negative electrode masses characteristics.
|
guest ::
