摘要
采用充放电测试、交流阻抗测试等方法研究了温度和添加剂对锂硫电池自放电的影响?。比较了锂硫电池在不同温度搁置后的自放电行为,实验结果表明,温度越低,锂硫电池的自放电程度越低;同时研究了添加剂对锂硫电池自放电的影响,实验结果表明,以硝酸锂为添加剂,可以在锂负极表面形成较为稳定的SEI膜,抑制聚硫与锂负极的反应。使用添加剂的锂硫电池5℃搁置10天放电比容量为1016mAg/g,自放电率为0.7%/天。
The effects of temperature and additive on self-discharge of lithium-sulfur batteries was investigated by charge-discharge test and EIS（electrochemical impedance spectroscopy）.The self-discharge behavior of lithium-sulfur batteries stored at different temperature was compared.The degree of self-discharge of lithium-sulfur batteries was reduced with lower temperature.The effect of additive on self-discharge of lithium-sulfur batteries was also investigated.It was found that SEI（solid electrolyte interphase） film was formed on the surface of lithium anode in lithium-sulfur batteries with LiNO3 as additive.The reaction between polysulfides and lithium anode was restrained.The discharge capacity of lithium-sulfur batterie with additive stored at 5℃ for 10 days was 1016 mAh/g,the rate of self-discharge was 0.7% per day.
出处
《电池工业》
CAS
2010年第6期363-366,共4页
Chinese Battery Industry
关键词
锂硫电池
自放电
温度
添加剂
lithium-sulfur batteries
self-discharge
temperature
additive
