| 过充电时LiMn2O4/LiPF6-(EC+DEC)界面性质 |
| |
| 引用本文： | 吕东生,李伟善,刘煦,邱仕洲.过充电时LiMn2O4/LiPF6-(EC+DEC)界面性质[J].电池,2004,34(4):268-269. |
| |
| 作者姓名： | 吕东生 李伟善 刘煦 邱仕洲 |
| |
| 作者单位： | 华南师范大学化学系,广东,广州,510631;广州电池厂,广东,广州,510253 |
| |
| 基金项目： | 广东省自然科学基金，广东省教师资助项目，031533，Q02088，， |
| |
| 摘 要： | 用交流阻抗法结合循环伏安法研究了LiMn2O4粉末微电极过充电对LiMn2O4/LiPF6-(EC+DEC)溶液界面性质的影响.结果表明:电荷传递电阻Rct随过充电时间的增加而增加,而表面膜电阻Rf基本不随过充电时间变化.过充电条件下,尖晶石锂锰氧化物的结构受到破坏,电解质的氧化产物可能是气体和水.
|
| 关 键 词： | 过充电 交流阻抗 电解液分解 容量衰减 |
| 文章编号： | 1001-1579(2004)04-0268-02 |
| 修稿时间： | 2004年1月16日 |
The properties of LiMn2O4/LiPF6-(EC + DEC) interface during overcharge |
| |
| LU Dong-sheng,LI Wei-shan,LIU Xu,QIU Shi-zhou.The properties of LiMn2O4/LiPF6-(EC + DEC) interface during overcharge[J].Battery Bimonthly,2004,34(4):268-269. |
| |
| Authors: | LU Dong-sheng LI Wei-shan LIU Xu QIU Shi-zhou |
| |
| Affiliation: | LU Dong-sheng~1,LI Wei-shan~1,LIU Xu~2,QIU Shi-zhou~2 |
| |
| Abstract: | The influence of overcharge of LiMn_2O_4 powder electrode on the properties of LiMn_2O_4/LiPF_6-(EC+DEC) interface were investigated by impedance technique and cyclic voltammetry.Results showed that charge-transfer resistance R _(ct) increased with overcharge time, while surface film resistance R _f changed little during overcharge.Structure of LiMn_2O_4 was destroyed, gas and water could be produced during overcharge. |
| |
| Keywords: | overcharge EIS electrolyte decomposition capacity fading |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
