期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202107923
关键词
lithium dendrites; lithium metal anodes; lithium metal batteries; organic-inorganic composite layers; surface chelation
类别
资金
- National Natural Science Foundation of China [21771018, 21875004]
- Natural Science Foundation of Beijing [2192018]
- National Natural Science Foundation of China-Regional Innovation Joint Exploration Fund [U19A2019]
- PULEAD Technology Industry Co. Ltd.
- National Natural Science Foundation of China
- Ministry of Foreign Affairs and International Cooperation, Italy [NSFC-MAECI 51861135202]
- Beijing University of Chemical Technology [buctrc201901]
A surface chelation strategy using phytic acid is proposed to create an organophosphorus hybrid flexible solid electrolyte interphase (SEI) layer for lithium metal batteries, improving cycling life and battery performance significantly.
Lithium metal is a promising anode candidate for the next-generation rechargeable battery system because of its highest specific capacity and lowest potential. However, low Coulombic efficiency (CE) and the formation of Li dendrites during the cycling process seriously hinder its practical application. Here, an organophosphorus hybrid flexible solid electrolyte interphase (SEI) layer is proposed based on a surface chelation strategy using phytic acid (PA) as Li metal surface treatment chemicals. Different from the traditional SEI layer, the polynuclear complex between PA and Li+ serves as a connecter in this SEI layer, which not only ensures its mechanical flexibility but also improves its lithiophilic property and ionic conductivity. With these advantages, the Li || Cu cells exhibit a high CE of 99.0% over 500 cycles at a current density of 0.5 mA cm(-2). Li || Li symmetrical cells can also maintain a stable Li plating/stripping process over 2500 h at a high current density of 10.0 mA cm(-2). Besides, all Li metal batteries (Li || S, Li || NCM, Li || LFP et al.) based on this strategy exhibit long cycling life and high capacity retention. This surface chelation strategy is believed to offer a new avenue to fabricate a stable and efficient SEI layer for practical application of Li metal batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据