期刊
ELECTROCHIMICA ACTA
卷 173, 期 -, 页码 804-811出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.05.110
关键词
Lithium cobalt oxide; Lithium ion battery; Cyclic stability; Trimethylboroxine; Electrolyte additive; Interfacial film
资金
- National Natural Science Foundation of China [21303061]
- Joint Project of the National Natural Science Foundation of China
- Natural Science Foundation of Guangdong [U1401248]
- Natural Science Foundation of Guangdong Province [2014A030313424]
- key project of Science and Technology in Guangdong Province [2012A090300012, 2013B090800013]
- Dongguan City Project for Cooperation among Industries, Universities and Institutes [2014509136101]
- scientific research project of Department of Education of Guangdong Province [2013CXZDA013]
Trimethylboroxine (TMB) is used as electrolyte additive to improve the cyclic stability of LiCoO2/graphite full cell under high voltage. It is found that capacity retention of LiCoO2/graphite cell at 0.3C rate after 200 cycles between 3.0 similar to 4.5 V is improved from 29 % to 66 % by applying 0.5 % (by weight) TMB in EC-based electrolyte. Charge-discharge tests on graphite/Li and LiCoO2/Li half cells demonstrate that the improvement in cyclic stability of the full cell results from the contribution of TMB to the enforced stability of LiCoO2 cathode. Cyclic voltammogram shows that TMB is oxidized preferentially to the EC-based electrolyte, while physical characterizations, from SEM, TEM, FTIR and XPS, indicate that TMB helps build a thin but protective film on LiCoO2, which improves the interfacial stability of high voltage electrode/electrolyte. (C)2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据