[中文文摘]环己基苯和二甲苯作为耐过充添加剂加入锂离子电池电解液中。环己基苯和二甲苯分别在4.70 V、4.66 V(vs.Li/Li+)处发生电聚合反应。聚合物几乎全部覆盖在隔膜表面,阻断了反应,改善了电池的安全性。添加5%添加剂的电池,均可耐3C1、0 V过充电,且对电池正常充放电时的电化学性能影响很小。[英文文摘]Cyclohexyl benzene(CB) and xylene as overcharging additives were added into Liion battery electrolyte.CB and xylene could be electrochemically polymerized at 4.70 V and 4.66 V(vs.Li/Li~+),respectively.The polymer mainly deposited on the separator,restrained the reaction and improved the safety performance of the battery.The batteries with the additives could resist overcharge of 3 C,10 V when the content of additive was 5%.There was only a slight influence on the electrochemical performance of the batteries with normal charge-discharge.973项目(2002CB211800); 国家自然科学基金(20373058)；厦门市科技计划项目(3502Z20055018)
