期刊
CERAMICS INTERNATIONAL
卷 44, 期 6, 页码 6558-6563出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.01.058
关键词
Solid-state electrolytes; LATP; Microstructure Ionic conductivity; LiBO2
资金
- National Key Research and Development Program of China [2017YFB0703200, 2016YFB0700300, 2017YFB0310400]
- National Natural Science Foundation of China [51572277, 51702340]
- Shanghai Science and Technology Committee [17YF1428800, 17ZR1434800, 17dz2307000]
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure of Shanghai Institute Ceramics, Chinese Academy of Sciences
Concerning the safety problems of conventional Li-ion batteries with liquid electrolytes, it is crucial to develop reliable solid-state electrolytes with high ionic conductivity. Li1+xAlxTi2-x(PO4)(3) (LATP, x = 0.3) is regarded as one of the most promising solid electrolytes due to its high ionic conductivity and excellent chemical stability to humidity. Herein, a new strategy is proposed for improving the sintering behavior and enhancing the ionic conductivity of LATP by using LiBO2 as the sintering aid via liquid phase sintering. The as-prepared sample LATP with homogeneous microstructure and high relative density of 97.1% was successfully synthesized, yielding high total ionic conductivity of 3.5 x 10(-4) S cm(-1) and low activation energy of 0.39 eV at room temperature. It was found that the addition of LiB02 could effectively enhance the densification and increase the ionic conductivity of LATP electrolyte, proving an effective way to synthesis LATP ceramics by a simple and reliable route.
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