Premium
Uniform High Ionic Conducting Lithium Sulfide Protection Layer for Stable Lithium Metal Anode
Author(s) -
Chen Hao,
Pei Allen,
Lin Dingchang,
Xie Jin,
Yang Ankun,
Xu Jinwei,
Lin Kaixiang,
Wang Jiangyan,
Wang Hansen,
Shi Feifei,
Boyle David,
Cui Yi
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201900858
Subject(s) - anode , materials science , electrolyte , lithium (medication) , lithium metal , metal , chemical engineering , sulfide , lithium vanadium phosphate battery , ionic conductivity , inorganic chemistry , nanotechnology , electrode , metallurgy , chemistry , medicine , engineering , endocrinology
Artificial solid‐electrolyte interphase (SEI) is one of the key approaches in addressing the low reversibility and dendritic growth problems of lithium metal anode, yet its current effect is still insufficient due to insufficient stability. Here, a new principle of “simultaneous high ionic conductivity and homogeneity” is proposed for stabilizing SEI and lithium metal anodes. Fabricated by a facile, environmentally friendly, and low‐cost lithium solid‐sulfur vapor reaction at elevated temperature, a designed lithium sulfide protective layer successfully maintains its protection function during cycling, which is confirmed by both simulations and experiments. Stable dendrite‐free cycling of lithium metal anode is realized even at a high areal capacity of 5 mAh cm −2 , and prototype Li–Li 4 Ti 5 O 12 cell with limited lithium also achieves 900 stable cycles. These findings give new insight into the ideal SEI composition and structure and provide new design strategies for stable lithium metal batteries.