Chemical stability of cubic Li7La3Zr2O12 with molten lithium at elevated temperature

被引：141

作者：

Wolfenstine, J. ^{[1
]}

Allen, J. L. ^{[1
]}

Read, J. ^{[1
]}

Sakamoto, J. ^{[2
]}

机构：

[1] RDRL SED C, Army Res Lab, Adelphi, MD 20783 USA

[2] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

来源：

JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 17期

关键词：

BETA-ALUMINA; SOLID-ELECTROLYTE; NASICON ELECTROLYTES; IONIC-CONDUCTIVITY; SODIUM; GARNET; FABRICATION; COLORATION; SYSTEM; NA;

D O I：

10.1007/s10853-013-7380-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cubic garnet of nominal composition Li7La3Zr2O12 (LLZO) is of interest as a possible electrolyte in a Li-metal halide battery composed of molten Li and an insoluble metal halide as electrodes operating in the temperature range of similar to 300-350 A degrees C. As a consequence, the chemical stability of LLZO with molten Li in this temperature range was investigated. After heating in molten Li, the LLZO surface had undergone chemical coloration. X-diffraction, X-ray photoemission spectroscopy, electron paramagnetic resonance, and heat-treatment experiments suggest that chemical coloration is a result of the formation of color centers, composed of an electron trapped at an oxygen vacancy. It was also observed that after immersion in molten Li that LLZO exhibited intergranular cracking. It is believed that cracking results from stresses generated from an increased Li+ content, gained during immersion.

引用

页码：5846 / 5851

页数：6

共 25 条

[1] THE CHEMICAL AND ELECTROCHEMICAL STABILITY OF BETA-ALUMINA [J].