锂-硫二次电池界面反应的特殊性与对策分析

doi:10.61558/2993-074X.2907

电化学（中英文） ›› 2012, Vol. 18 ›› Issue (3): 224-228. doi: 10.61558/2993-074X.2907

• 电化学材料基础与表界面研究专辑（中国科学院化学研究所万立骏院士主编） • 上一篇下一篇

锂-硫二次电池界面反应的特殊性与对策分析

艾新平, 曹余良, 杨汉西*

武汉大学化学与分子科学学院，湖北武汉 430072

收稿日期:2011-11-08 修回日期:2012-02-20 出版日期:2012-06-28 发布日期:2012-02-25
通讯作者: 杨汉西 E-mail:hxyang@whu.edu.cn
基金资助:
国家973计划项目（No. 2009CB220103）资助

Simple Analysis and Possible Solutions of the Unusual Interfacial Reactions in Li-S batteries

AI Xin-Ping, CAO Yu-Liang, YANG Han-Xi*

College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China

Received:2011-11-08 Revised:2012-02-20 Published:2012-06-28 Online:2012-02-25
Contact: YANG Han-Xi E-mail:hxyang@whu.edu.cn

摘要/Abstract

摘要： 锂-硫电池是在现有锂离子电池基础上最可能实现储能密度大幅提升的实用二次电池体系. 然而，这一电池体系的电化学利用率与循环稳定性仍然难以满足应用要求. 造成锂-硫电池性能不稳定的原因在于硫正极和锂负极的材料结构和反应环境始终处于变化之中，如在充放电过程中，硫-碳反应界面的电化学阻塞、中间产物的溶解流失、正负极之间的穿梭效应等副反应导致正极与负极均难形成稳定的电化学反应界面。针对这些特殊问题，本文简要分析了影响能量利用率和循环稳定性的化学与电化学机制，并提出了构建稳定锂负极与高效硫正极的若干可行性技术.

关键词: 锂-硫二次电池, 界面反应, 电化学微环境

Abstract: Rechargeable Li-S batteries are a promising power source with realizable energy densities several times higher than current Li-ion batteries. However, the capacity utilization and cycling stability of the existing Li-S technologies are still insufficient for battery applications. The causes for the electrochemical instability of this redox system arise probably from the changes in the surface structures and electrochemical microenvironments of the Li anode and sulfur cathode during charge-discharge reactions, which includes the frustrated electron transfer in the sulfur-carbon interface, the dissoluble diffusion of the polysulfide intermediates, and the shuttle reaction inbetween the sulfur and Li electrodes. To deal with these problems, this paper tries to reveal the underlying chemistry affecting the charge-discharge stability of Li-S system and describe possible strategies to construct electrochemically stable Li anode and sulfur cathode, so as to achieve high efficiency Li-S batteries.

Key words: rechargeable Li-S batteries, interfacial reactions, electrochemical microenviornments

中图分类号:

O646

艾新平, 曹余良, 杨汉西. 锂-硫二次电池界面反应的特殊性与对策分析[J]. 电化学（中英文）, 2012, 18(3): 224-228.

AI Xin-Ping, CAO Yu-Liang, YANG Han-Xi. Simple Analysis and Possible Solutions of the Unusual Interfacial Reactions in Li-S batteries[J]. Journal of Electrochemistry, 2012, 18(3): 224-228.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.2907

https://electrochem.xmu.edu.cn/CN/Y2012/V18/I3/224

参考文献

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锂-硫二次电池界面反应的特殊性与对策分析

Simple Analysis and Possible Solutions of the Unusual Interfacial Reactions in Li-S batteries

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