W-Doped Li7La3Zr2O12 Ceramic Electrolytes for Solid State Li-ion Batteries

被引：173

作者：

Li, Yiqiu ^{[1
]}

Wang, Zheng ^{[1
]}

Cao, Yang ^{[1
]}

Du, Fuming ^{[1
]}

Chen, Cheng ^{[1
]}

Cui, Zhonghui ^{[1
]}

Guo, Xiangxin ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2015年 / 180卷

基金：

中国国家自然科学基金;

关键词：

Solid state electrolyte; W-doping garnet; Ionic conductivity; Electrochemical property; Lithium ion battery; LITHIUM; CONDUCTIVITY; DENSIFICATION; AL;

D O I：

10.1016/j.electacta.2015.08.046

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

W-doped Li7La3Zr2O12 electrolytes with composition of Li7-2xLa3Zr2-xWxO12 (LLZWO, x=0-0.55) were prepared by conventional solid state reaction. The incorporation of W proves beneficial to stabilization of cubic phase and densification of the ceramic, resulting in relative density of 96% and ionic conductivity of 6.6 x 10(-4)S cm(-1) at 25 degrees C. Further analysis indicates that the LLZWO is not only chemically but also electrochemically (at least up to 4.5V) stable against Li metal anodes. The batteries consisting of Li/LLZWO/Electrolyte-soaked separator/LiNi0.33Mn0.33Co0.33O2 at 25 degrees C exhibit the capacity of 142 mAh g(-1) at a constant current of 15 mAg(-1) at the first discharge, which could run for 20 cycles with capacity retention of 94%. These results indicate that the W-doped LLZO ceramics are promising electrolytes for solid state lithium ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：37 / 42

页数：6

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