|
ИСТИНА |
Войти в систему Регистрация |
ФНКЦ РР |
||
Electrochemical properties of composites based on lithium titanate and mesoporous carbonтезисы доклада
- Авторы: Stenina I., Shaydullin R., Sobolev A., Kulova T., Skundin A., Yaroslavtsev A.
- Сборник: 14th International Conference Fundamental Problems of Solid State Ionics 2018
- Тезисы
- Год издания: 2018
- Первая страница: 397
- Последняя страница: 397
- Аннотация: Lithium titanate (Li4Ti5O12) seems to be a promising anode material for lithium-ion batteries. Long cycling life and safety are the main advantages of batteries with anodes on its base. In some cases, the electrochemical properties of electrode materials can be significantly improved by formation of composite materials with carbon. In this work, composite materials Li4Ti5O12/C were prepared by the hydrothermal method. Both commercial mesoporous carbon, carbon replicas obtained using mesoporous silica SBA-15 as template, and carbon black Timcal were used for the synthesis. The obtained materials were characterized using XRD, SEM, TEM, BET method, Raman spectroscopy. The influence of surfactants (СTABr, Triton X), the nature and content of carbon material on the formation of the Li4Ti5O12/C composites and their electrochemical properties was studied. The use of СTABr leads to a slight improvement in the cycling performance of the samples, including cycling at high current densities. A decrease of the discharge capacity and cycling performance of the composites obtained using more than 20% of the carbon material was shown. At low charge/discharge rates, the Li4Ti5O12/C samples with commercial mesoporous carbon exhibit the highest electrochemical capacity. At high current densities (3200 mA/g), the discharge capacities of samples with commercial mesoporous carbon and carbon black Timcal are 70 and 84 mAh/g, respectively.
- Добавил в систему: Скундин Александр Мордухаевич