期刊
JOURNAL OF POWER SOURCES
卷 355, 期 -, 页码 69-73出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.04.044
关键词
Li7La3Zr2O12 electrolyte; Lithium borate; Lithium ionic conductivity; Stability
资金
- National Natural Science Foundation of China [51502300]
- Anhui Provincial Natural Science Foundation [1608085QE88]
- Hefei Center of Materials Science and Technology [2014DCZY006]
The cubic Ca/Ta-substituted Li-6.55(La2.95Ca0.05)(Zr1.5Ta0.5)O-12 (LLCZTO) electrolytes were synthesized at 800 degrees C with Li3BO3 as additives. The optimal amount of Li3BO3 and its influences on the microstructure, crystal structures, Li+ conductivity and the stability of the Li-6.55(La2.95Ca0.05)(Zr1.5Ta0.5)O-12 were studied by SEM, XRD and EIS. Among all the samples, when the molar ratio of Li3BO3 to the Li-6.55(La2.95Ca0.05)(Zr1.5Ta0.5)O-12 is 4:5, the highest Li+ conductivity of 1.33 x 10(-4) S cm(-1) at 30 degrees C is obtained. When the LLCZTO samples are exposed in air, the Li+ conductivity is deteriorated possibly owing to the side reactions between the LLCZTO and the H2O or CO2 in the air. The Li3BO3 addition can alleviate such deterioration of the Li+ conductivity. (C) 2017 Elsevier B.V. All rights reserved.
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