Air‐Stable Li2S Cathodes Enabled by an In Situ‐Formed Li+ Conductor for Graphite‐Li2S Pouch Cells

Author:

Qi Xiaoqun1,Jin Xiaoyu1,Xu Henghui1,Pan Yujun1,Yang Fengyi1,Zhu Zhenglu1,Ji Jie1,Jiang Ruining1,Du Haoran1,Ji Yongsheng1,Yang Dan1,Qie Long1ORCID,Huang Yunhui1

Affiliation:

1. State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China

Abstract

AbstractUsing Li2S cathodes instead of S cathodes presents an opportunity to pair them with Li‐free anodes (e.g., graphite), thereby circumventing anode‐related issues, such as poor reversibility and safety, encountered in Li‐S batteries. However, the moisture‐sensitive nature of Li2S causes the release of hazardous H2S and the formation of insulative by‐products, increasing the manufacturing difficulty and adversely affecting cathode performance. Here, Li4SnS4, a Li+ conductor that is air‐stable according to the hard–soft acid–base principle, is formed in situ and uniformly on Li2S particles because Li2S itself participates in Li4SnS4 formation. When exposed to air (20% relative humidity), the protective Li4SnS4 layer maintains its components and structure, thus contributing to the enhanced stability of the Li2S@Li4SnS4 composite. In addition, the Li4SnS4 layer can accelerate the sluggish conversion of Li2S because of its favorable interfacial charge transfer, and continuously confine lithium polysulfides owing to its integrity during electrochemical processes. A graphite‐Li2S pouch cell containing a Li2S@Li4SnS4 cathode is constructed, which shows stable cyclability with 97% capacity retention after 100 cycles. Hence, combining a desirable air‐stable Li2S cathode and a highly reversible Li‐free configuration offers potential practical applications of graphite‐Li2S full cells.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3