Uniform High Ionic Conducting Lithium Sulfide Protection Layer for Stable Lithium Metal Anode

被引：551

作者：

Chen, Hao ^{[1
]}

Pei, Allen ^{[1
]}

Lin, Dingchang ^{[1
]}

Xie, Jin ^{[1
]}

Yang, Ankun ^{[1
]}

Xu, Jinwei ^{[1
]}

Lin, Kaixiang ^{[1
]}

Wang, Jiangyan ^{[1
]}

Wang, Hansen ^{[1
]}

Shi, Feifei ^{[1
]}

Boyle, David ^{[1
]}

Cui, Yi ^{[1
,2
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

来源：

ADVANCED ENERGY MATERIALS | 2019年 / 9卷 / 22期

关键词：

artificial SEI; compositional homogeneity; high ionic conductivity; lithium metal batteries; RECHARGEABLE BATTERIES; ELECTROLYTES; INTERPHASES; LIQUID;

D O I：

10.1002/aenm.201900858

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

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-Li4Ti5O12 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.

引用

页数：8

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