| 锂电池用草酸二氟硼酸锂有机电解液的电化学性能 |
| Electrochemical Properties of LiBC2O4F2 Organic Electrolytes for Lithium Batteries |
|
| 摘要: 以草酸锂和三氟化硼乙醚溶液合成了草酸二氟硼酸锂(LiBC2O4F2)，并用碳酸二甲酯溶剂萃取和重结晶提纯。LiBC2O4F2有机电解液能在铝箔上形成一层致密的保护膜，这能较好地抑制在高电位时电解液在铝箔上发生氧化反应，而且在很宽的温度范围内LiBC2O4F2基电解液都具有较好的离子电导率。电化学测试结果表明：使用1.0 mol·L-1 LiBC2O4F2有机电解液的LiMn2O4/Li电池首次放电容量为110.2 mAh·g-1，并且具有比使用LiPF6有机电解液的LiMn2O4/Li电池更好的高低温循环性能和更优良的低温放电性能。 |
| 关键词: 草酸二氟硼酸锂 电解液 电化学性能 锂电池 |
| 基金项目: |
| Abstract: Lithium difluoro(axalato)borate(LiBC2O4F2) was synthesized by the reaction of Li2C2O4 and BF3 etherate，and purified through extraction and recrystallization using dimethyl carbonate(DMC) as the solvent. LiBC2O4F2 organic electrolytes can form a dense protecting layer on the Al current collector surface so as to effectively suppress the oxidation of electrolytic solvents at high potentials. LiBC2O4F2 organic electrolytes possessed excellent ionic conductivity in a wide temperature range. The results of electrochemical experiments indicated that the discharging capacity of LiMn2O4/Li batteries using 1.0 mol·L-1 LiBC2O4F2 organic electrolytes was 110.2 mAh·g-1, and LiMn2O4/Li batteries using the electrolyte containing LiBC2O4F2 exhibited better cycling performance at both room temperature and higher temperature， and excellent low temperature discharging performance. |
| Keywords: lithium bis(oxalato)borate electrolyte electrochemical property lithium batteries |
| |
| 摘要点击次数: 2008 |
| 全文下载次数: 2078 |
| 邓凌峰,陈 洪.锂电池用草酸二氟硼酸锂有机电解液的电化学性能[J].无机化学学报,2009,25(9):1646-1650. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
