Stabilization-of cubic lithium-stuffed garnets of the type "Li7La3Zr2O12" by addition of gallium

被引：170

作者：

El Shinawi, Hany ^{[1
,2
]}

Janek, Juergen ^{[1
]}

机构：

[1] Univ Giessen, Inst Phys Chem, D-35392 Giessen, Germany

[2] Mansoura Univ, Dept Chem, Fac Sci, Mansoura 35516, Egypt

来源：

JOURNAL OF POWER SOURCES | 2013年 / 225卷

关键词：

Gallium-modified Li7La3Zr2O12; Lithium-stuffed garnet; Fast lithium ion conductor; Lithium ion battery; SOLID-ELECTROLYTE; ION CONDUCTION; BATTERY; NB; BA;

D O I：

10.1016/j.jpowsour.2012.09.111

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cubic lithium-stuffed garnets of the type Li7La3Zr2O12 have been successfully stabilized by incorporation of gallium. The materials have been prepared by a sal-gel procedure with final calcination at 1085 degrees C for 6 h. Under the applied synthesis conditions, 0.3 mole of gallium ions (per mole of Li7La3Zr2O12) were sufficient to fully stabilize the cubic garnet-type phase. Increasing the fraction of gallium led to significant improvement of sinterability and lithium ion conductivity. Excess gallium ions, in the form of LiGaO2, act as a sintering aid and reside exclusively at the grain boundaries. The gallium-modified garnets showed conductivities up to 5.4 x 10(-4) S cm(-1) at 20 degrees C, and activation energies in the range 0.32-0.37 eV. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：13 / 19

页数：7

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