Binding FSI to Construct a Self‐Healing SEI Film for Li‐Metal Batteries by In situ Crosslinking Vinyl Ionic Liquid

Author:

Qin Yinping12,Wang Hefeng2,Zhou Jingjing2,Li Ruyi2,Jiang Chun1,Wan Yi1,Wang Xiaoyi1,Chen Zhenlian1,Wang Xiaolei3,Liu Yang1245,Guo Bingkun2,Wang Deyu1ORCID

Affiliation:

1. Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education, School of Optoelectronic Materials & Technology Jianghan University Wuhan China

2. Materials Genome Institute Shanghai University, Shanghai 99 Shangda Road, Baoshan District Shanghai China

3. Department of Chemical & Materials Engineering University of Alberta Edmonton Alberta T6G 1H9 Canada

4. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Tianjin 300071 China

5. Department of Mechanical and Materials Engineering Western University London Ontario N6A 5B8 Canada

Abstract

AbstractThe solid electrolyte interphase (SEI) membrane on the Li metal anode tends to breakdown and undergo reconstruction during operation, causing Li metal batteries to experience accelerated decay. Notably, an SEI membrane with self‐healing characteristics can help considerably in stabilizing the Li‐electrolyte interface; however, uniformly fixing the repairing agent onto the anode remains a challenging task. By leveraging the noteworthy film‐forming attributes of bis(fluorosulfonyl)imide (FSI) anions and the photopolymerization property of the vinyl group, the ionic liquid 1‐vinyl‐3‐methylimidazolium bis(fluorosulfonyl)imide (VMI‐FSI) was crosslinked with polyethylene oxide (PEO) in this study to form a self‐healing film fixing FSI groups as the repairing agent. When they encounter lithium metal, the FSI groups are chemically decomposed into LiF & Li3N, which assist forming SEI membrane on lithium sheet and repairing SEI membrane in the cracks lacerated by lithium dendrite. Furthermore, the FSI anions exchanged from film are electrochemically decomposed to generate inorganic salts to strengthen the SEI membrane. Benefiting from the self‐healing behavior of the film, Li/LiCoO2 cells with the loading of 16.3 mg cm−2 exhibit the initial discharge capacities of 183.0 mAh ⋅ g−1 and are stably operated for 500 cycles with the retention rates of 81.4 % and the average coulombic efficiency of 99.97 %, operated between 3.0–4.5 V vs. Li+/Li. This study presents a new design approach for self‐healing Li metal anodes and durable lithium metal battery.

Funder

National Natural Science Foundation of China

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