Preparation and electrochemical properties of Zr-site substituted Li7La3(Zr2-xMx)O12 (M = Ta, Nb) solid electrolytes

被引：66

作者：

Huang, Mian ^{[1
]}

Shoji, Mao ^{[2
]}

Shen, Yang ^{[1
]}

Nan, Ce-Wen ^{[1
]}

Munakata, Hirokazu ^{[2
]}

Kanamura, Kiyoshi ^{[2
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, Dept Appl Chem, Tokyo 1920397, Japan

来源：

JOURNAL OF POWER SOURCES | 2014年 / 261卷

关键词：

All-solid-state Li ion battery; Solid electrolyte; Garnet structure; Li ion conductivity; Doping; IONIC-CONDUCTIVITY; LI7LA3ZR2O12; AL; BATTERY;

D O I：

10.1016/j.jpowsour.2014.03.070

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：

Li2La3Zr2O12 (LLZ) solid electrolytes with Zr site partially substituted by Ta and Nb elements were prepared via the conventional solid-state reaction. All the compositions could lead to the cubic garnet-type structure after sintering at 1150 degrees C. The use of gamma-Al2O3 as a sintering aid in the preparation of doped LLZ was studied. It was shown that Al could help to improve the micro-structure for Nb doping, but not necessary for Ta doping. The Ta and Nb doping enhanced the ionic conductivity at 25 degrees C to 4.09 x 10 (-4) S cm-(1) and 4.50 x 10(-4) S cm(-1), respectively. A conductivity as high as 1.23 x 10(-3) S cm(-1) was obtained when measured at 50 C in air for the Nb-doped LLZ. All-solid-state batteries with LLZTa and LLZNb solid electrolytes were assembled and tested. The cyclic voltammetry (CV) measurement indicated the successful working of the batteries. (c) 2014 Elsevier B.V. All rights reserved.

引用

页码：206 / 211

页数：6

共 21 条

[1]

Effect of substitution (Ta, Al, Ga) on the conductivity of Li7La3Zr2O12 [J].