Li2S6-Integrated PEO-Based Polymer Electrolytes for All-Solid-State Lithium-Metal Batteries

被引：216

作者：

Fang, Ruyi ^{[1
,2
]}

Xu, Biyi ^{[1
,2
]}

Grundish, Nicholas S. ^{[1
,2
]}

Xia, Yang ^{[3
]}

Li, Yutao ^{[1
,2
]}

Lu, Chengwei ^{[3
]}

Liu, Yijie ^{[1
,2
]}

Wu, Nan ^{[1
,2
]}

Goodenough, John B. ^{[1
,2
]}

机构：

[1] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA

[2] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

[3] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 32期

关键词：

all-solid-state battery; composite electrolyte; Li+ conductivity; Li2S6; poly(ethylene oxide); IONIC-CONDUCTIVITY; PLASTICIZER; CHEMISTRY; EC;

D O I：

10.1002/anie.202106039

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The integration of Li2S6 within a poly(ethylene oxide) (PEO)-based polymer electrolyte is demonstrated to improve the polymer electrolyte's ionic conductivity because the strong interplay between O-(PEO)(2-) and Li+ from Li2S6 reduces the crystalline volume within the PEO. The Li/electrolyte interface is stabilized by the in situ formation of an ultra-thin Li2S/Li2S2 layer via the reaction between Li2S6 and lithium metal, which increases the ionic transport at the interface and suppresses lithium dendrite growth. A symmetric Li/Li cell with the Li2S6-integrated composite electrolyte has excellent cyclability and a high critical current density of 0.9 mA cm(-2) at 40 degrees C. Impressive electrochemical performance is demonstrated with all-solid-state Li/LiFePO4 and high-voltage Li/LiNi0.8Mn0.1Co0.1O2 cells at 40 degrees C.

引用

页码：17701 / 17706

页数：6

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