锂离子电池的低温性能研究  

Study of low temperature performance of Li-ion battery

作　　者：王洪伟[1,2] 杜春雨[1] 王常波[1,2] 

机构地区：[1]哈尔滨工业大学化工学院,黑龙江哈尔滨150001 [2]哈尔滨光宇蓄电池股份有限公司,黑龙江哈尔滨150086

出　　处：《电池》2009年第4期208-210,共3页Battery Bimonthly

摘　　要：向电解液中添加碳酸亚乙烯酯(VC),可提高负极界面的导电性与稳定性。在-20℃下放电,电解液中加VC的电池的放电电压平台比不加VC的电池提高约25%。三电极实验结果表明:在低温下由于电池阻抗增大,极化增强,充电过程在负极出现金属锂沉积;金属锂与电解液发生还原反应形成SEI膜,SEI膜的状态与充电电流有关。Adding vinylene carbonate（VC） into electrolyte could enhance the conductivity and stability of anode surface. When discharge at - 20℃,the discharge voltage platform of battery with VC added into electrolyte was about 25% higher than the battory without VC adding. The results of three-electrode experiment showed that metal lithium deposition appeared on the anode during the process of charge since the impedance of the battery increased and pelarization enhanced at low temperature. MetAl lithium would take reduction reaction with electrolyte and form SEI film, the state of SEI film was caused by charge current.

关 键 词：锂离子电池 低温 电解液 锂沉积 SEI膜 碳酸亚乙烯酯(VC) 

分 类 号：TM912[电气工程—电力电子与电力传动]