高等学校化学学报2011，Vol.32Issue(11)：2645-2649,5.
硝酸锂作添加剂对锂硫电池电化学性能的影响
Effect of LiNO3 as Additive on Electrochemical Properties of Lithium-sulfur Batteries
熊仕昭 1谢凯 1洪晓斌1
作者信息
- 1. 国防科学技术大学航天与材料工程学院材料工程与应用化学系,长沙410073
- 折叠
摘要
Abstract
The effect of LiNO3 as additive on electrochemical properties of lithium-sulfur batteries was investigated by charge-discharge and electrochemical impedance spectroscopy ( EIS). The effect of LiNO3 on lithium anode was investigated by scanning electron microscope( SEM) and the interacting mechanisms of LiNO3 was discussed. It was found that LiNO3 adopted as additive of electrolyte formed protective surface film on lithium electrode. The film resulted in passivation at the surface of the electrode and prevented the parasitic reaction between higher-order polysulfide and lithium electrode. Cycle life and capacity of lithium-sulfur batteries were improved because the film prevented the formation of irreversible Ii2S on lithium electrode. The initial discharge capacity of lithium sulfurbatteries with LiNO3 is 1172 mA ? H/g. A reversible capacity of 629 mA ? H/ g after 100 cycles was obtained.关键词
硝酸锂/添加剂/锂负极/界面膜/锂硫电池Key words
LiNO3/ Additive/ Lithium anode/ Interface film/ Lithium-sulfur battery分类
化学化工引用本文复制引用
熊仕昭,谢凯,洪晓斌..硝酸锂作添加剂对锂硫电池电化学性能的影响[J].高等学校化学学报,2011,32(11):2645-2649,5.
