【作者】 刘玉文； 李小龙； 顾琪萍； 马骏涛； 张翠芬； 黄玉东；

【Author】 Liu Yuwen Li Xiaolong Gu Qiping Ma Juntao Zhang Cuifen Huang Yudong(Department of Applying Chemistry, Harbin Institute of Technology, Harbin, 150001; Research Center of JIANGMEN JJJ BATTERY Co.,LTD, JIANGMEN City, 529000)

【机构】 哈尔滨工业大学应用化学系； 广东江门三捷电池实业有限公司研究中心；

【摘要】 利用电化学阻抗谱、线性电势扫描法和计时电流法研究了锂金属电极与聚合物电解质界面阻抗的时效性和温度稳定性,锂金属溶出与沉积过程。发现开路时,锂金属电极与聚合物电解质之间存在界面反应,锂电极表面发生钝化;在直流电场中,沉积锂表面钝化不能抑制锂枝晶的生长。锂电极与聚合物电解质界面处的死锂导致了循环性能的降低。更多还原

【Abstract】 The time evolution and thermal stability of interfacial resistance and plating/stripping process between lithium electrode and polymer electrode were studied Through EIS,Linear-sweep voltametry and potentiostatic polarization. Under open-circuit potential condition, lithium metal could react with polymer electrolyte and be passivated.In DC electric field, the passivation film on the surface of plating lithium could not prevent dendritic growth of lithium. It was ’dead’ lithium between the lithium electrode and polymer electrolyte that result in poor cycle ability.更多还原