Synthesis of mixed ionic and electronic conducting garnet with doping of transition elements (Fe, Co, Ni)

被引：20
作者：
Cheng, Xu [1 ]
Huang, Jiawei [1 ]
Qiang, Wenjiang [1 ]
Huang, Bingxin [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2020年 / 46卷 / 03期
关键词：
Mixed conductivity; Coating material; Garnet electrolyte; Element doping; SOLID-ELECTROLYTE; ELECTROCHEMICAL PERFORMANCE; SURFACE-LAYER; LI7LA3ZR2O12; CATHODE; AL; DESIGN;
D O I：
10.1016/j.ceramint.2019.10.094
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Garnet structure electrolyte Li(7)La(3)Z(2)O(12) (LLZO) exhibits high ionic conductivity, high fracture toughness, and low strain during cycling. The mechanical stability of cathodes could be improved by an LLZO coating. Nevertheless, the electronic conductivity of LLZO is in the order of 10(-9) S cm(-1), and therefore the electron conduction of cathodes is blocked by the LLZO coating layer. The electronic conductivity is raised by doping variable valence elements (Fe, Co, Ni) into garnets. The doping has only a weak effect on the ionic conductivity, while the electronic conductivity is increased to 10(-6) S cm(-1). Co-doped sample exhibits the highest electronic conductivity of 2.75 x 10(-6) S cm(-1). The mixed conducting garnets could be used as the coating material of cathodes, and besides could reduce the interfacial resistance between cathodes and solid electrolyte in all-solid-state batteries.
引用
收藏
页码：3731 / 3737
页数：7
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