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Research Article | Open Access

Searching for low-cost LixMOy compounds for compensating Li-loss in sintering of Li-Garnet solid electrolyte

Xiao Huanga,d, Zhen Songb, Tongping Xiuc, Michael E. Baddingb, Zhaoyin Wena,d( )
CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 200050, China
Corning Research Center China, 200 Jinsu Road, Shanghai, 201206, China
Corning Incorporated, Corning, NY, 14831, USA
University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan District, Beijing, 100049, China

Peer review under responsibility of The Chinese Ceramic Society.

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Graphical Abstract

Abstract

Cubic Li-Garnet Li7La3Zr2O12 (c-LLZO) is one of the promising solid-state electrolyte candidates for the next generation high safety solid-state batteries. However, preparing the electrolyte has many challenges. Li-loss during high temperature sintering is one of them. Mother powder with the same component of green garnet pellets is often used to co-fire with the pellets to compensate the Li-loss. Due to the high weight ratio of rare earth element La and non-recyclability of mother powder, it is worthy to explore low-cost mother powders to replace them. In this paper, low cost compounds such as Li5AlO4, Li2TiO3, Li2SiO3, Li4SiO4 and (Li2O)x-(ZrO2)1-x (x = 0.6–0.8) are investigated for substitution of the mother powder for compensating Li-loss during the sintering of LLZO. Dense Li6.4La3Zr1.4Ta0.6O12 (LLZTO) samples have been prepared by sintering with (Li2O)0.733(ZrO2)0.267 powder at 1150 ℃ for 5 h with the relative density of 95% and conductivity of 5.7 × 10−4 S cm−1 at 25 ℃, which show same performance with LLZTO ceramics sintered with LLZO mother powder.

Keywords

Li-garnetc-LLZOSolid electrolyteLi-lossLow-costSintering

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Journal of Materiomics
Volume 5 Issue 2,
June 2019
Pages 221-228
DOI: 10.1016/j.jmat.2018.09.004
Cite this article:
Huang X, Song Z, Xiu T, et al. Searching for low-cost LixMOy compounds for compensating Li-loss in sintering of Li-Garnet solid electrolyte. Journal of Materiomics, 2019, 5(2): 221-228. https://doi.org/10.1016/j.jmat.2018.09.004

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Received: 11 June 2018
Revised: 17 September 2018
Accepted: 18 September 2018
Published: 19 September 2018
© 2019 The Chinese Ceramic Society. Production and hosting by Elsevier B.V.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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