期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 12, 页码 7783-7789出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b12231
关键词
lithium-sulfur battery; electrolyte additive; lanthanum nitrate; surface morphology; lithium anode
资金
- 973 Program [2015CB251100]
- NSFC of China [51502145, 21573114, 21421001]
Lithium-sulfur (Li-S) battery is regarded as one of the most promising candidates beyond conventional lithium ion batteries. However, the instability of the metallic lithium anode during lithium electrochemical dissolution/deposition is still a major barrier for the practical application of Li-S battery. In this work, lanthanum nitrate, as electrolyte additive, is introduced into Li-S battery to stabilize the surface of lithium anode. By introducing lanthanum nitrate into electrolyte, a composite passivation film of lanthanum/lithium sulfides can be formed on metallic lithium anode, which is beneficial to decrease the reducibility of metallic lithium and slow down the electrochemical dissolution/deposition reaction on lithium anode for stabilizing the surface morphology of metallic Li anode in lithium-sulfur battery. Meanwhile, the cycle stability of the fabricated Li-S cell is improved by introducing lanthanum filtrate into electrolyte. Apparently, lanthanum nitrate is an effective additive for :the protection of lithium anode and the cycling stability of Li-S battery.
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