Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium-Ion Batteries

被引：636

作者：

Li, Yutao ^{[1
,2
]}

Xu, Biyi ^{[3
]}

Xu, Henghui ^{[1
,2
]}

Duan, Huanan ^{[3
]}

Lu, Xujie ^{[4
]}

Xin, Sen ^{[1
,2
]}

Zhou, Weidong ^{[1
,2
]}

Xue, Leigang ^{[1
,2
]}

Fu, Gengtao ^{[1
,2
]}

Manthiram, Arumugam ^{[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] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[4] Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM 87545 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2017年 / 56卷 / 03期

基金：

美国国家科学基金会;

关键词：

all-solid-state battery; interfacial resistance; Li-rich garnet; Li-S battery; lithium fluoride; LI+; CONDUCTIVITY; LI7LA3ZR2O12; CHALLENGES;

D O I：

10.1002/anie.201608924

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Li7La3Zr2O12-based Li-rich garnets react with water and carbon dioxide in air to form a Li-ion insulating Li2CO3 layer on the surface of the garnet particles, which results in a large interfacial resistance for Li-ion transfer. Here, we introduce LiF to garnet Li6.5La3Zr1.5Ta0.5O12 (LLZT) to increase the stability of the garnet electrolyte against moist air; the garnet LLZT-2 wt% LiF (LLZT-2LiF) has less Li2CO3 on the surface and shows a small interfacial resistance with Li metal, a solid polymer electrolyte, and organic-liquid electrolytes. An all-solid-state Li/polymer/LLZT-2LiF/ LiFePO4 battery has a high Coulombic efficiency and long cycle life; a Li-S cell with the LLZT-2LiF electrolyte as a separator, which blocks the polysulfide transport towards the Li-metal, also has high Coulombic efficiency and kept 93% of its capacity after 100 cycles.

引用

页码：753 / 756

页数：4

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