期刊
JOURNAL OF POWER SOURCES
卷 195, 期 21, 页码 7457-7461出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.05.022
关键词
Lithium ion battery; Cresyl diphenyl phosphate; Thermal stability; C80 micro-calorimeter
资金
- National Science Foundation of China [20603034]
To enhance the safety of lithium ion battery, cresyl diphenyl phosphate (COP) is explored as an additive in 1.0 M LiPF(6)/ethylene carbonate (EC) + diethyl carbonate (DEC) (1:1 wt.). The electrochemical performances of LiCoO(2)/CDP-electrolyte/C cells are tested. At the thermal aspect, the thermal stability of the electrolyte with COP is detected firstly by using a C80 micro-calorimeter, and then the charged LiCoO(2)/CDP-electrolyte/C cells are disassembled and wrapped to detect the thermal behaviors. The results indicate that CDP-containing electrolyte enhances the thermal stabilities of electrolyte and lithium ion battery, and the electrochemical performances of LiCoO(2)/CDP-electrolyte/C cell become slightly worse by using COP in the electrolyte. Furthermore, the cell with 10% (wt.) CDP-containing electrolyte shows better cycle efficiency than that of other CDP-containing electrolyte, such as containing 5% (wt.) COP and 15% (wt.) CDP. This maybe because that the mass ratio between COP and electrolyte is close to the reaction stoichiometric ratio in the 10% (wt.) COP-containing electrolyte, where stable solid electrolyte interphase (SEI) is formed. Therefore, 10% COP-containing electrolyte improves the safety of lithium ion battery and keeps its electrochemical performance. (C) 2010 Elsevier B.V. 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