Facile synthesis of lithium argyrodite Li5.5PS4.5Br1.5 with high ionic conductivity for all-solid-state batteries

Shuo Wang; Shuo Wang; Shuo Wang; Xinbin Wu; Yuhan Liang; Yushuai Xu; Shundong Guan; Kaihua Wen; Xiang Miao; Ying Liang; Hongcai He; Yuanhua Lin; Yang Shen; Ce-Wen Nan

doi:10.3389/fceng.2022.883502

Frontiers in Chemical Engineering (Oct 2022)

Facile synthesis of lithium argyrodite Li5.5PS4.5Br1.5 with high ionic conductivity for all-solid-state batteries

Shuo Wang,
Shuo Wang,
Shuo Wang,
Xinbin Wu,
Yuhan Liang,
Yushuai Xu,
Shundong Guan,
Kaihua Wen,
Xiang Miao,
Ying Liang,
Hongcai He,
Yuanhua Lin,
Yang Shen,
Ce-Wen Nan

Affiliations

Shuo Wang: Center of Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Wuhan, China
Shuo Wang: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Shuo Wang: Foshan (Southern China) Institute for New Materials, Foshan, China
Xinbin Wu: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Yuhan Liang: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Yushuai Xu: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Shundong Guan: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Kaihua Wen: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Xiang Miao: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Ying Liang: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Hongcai He: Qingtao Research Institute, Qingtao Energy Development Inc., Kunshan, China
Yuanhua Lin: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Yang Shen: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
Ce-Wen Nan: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China

DOI: https://doi.org/10.3389/fceng.2022.883502
Journal volume & issue: Vol. 4

Abstract

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Bromine-rich lithium argyrodite electrolytes with high ionic conductivity and low cost are promising for the replacement of flammable liquid electrolytes and separators in lithium-ion batteries. However, the synthesis process of argyrodite electrolytes is usually complex and time-consuming. We use a facile solid-state reaction method to obtain a highly Li-ion conductive Li5.5PS4.5Br1.5 (LPSB). The influence of annealing temperature on the phase and ionic conductivity of the LPSB was investigated for the first time. High ionic conductivity of 5.21 × 10−3 S cm−1 at room temperature for the LPSB with minor LiBr impurity was achieved by direct annealing at 430°C for 8 h. The In/InLi | LPSB | LiCoO2@ LiNb0.5Ta0.5O3 (LCO(coated))-LPSB cell with 8.53 mg cm−2 LCO loading shows a discharge capacity of 102 mAh g−1 with high-capacity retention of 93% after 70 cycles at 0.5 mA cm−2 at 30°C.

Published in Frontiers in Chemical Engineering

ISSN: 2673-2718 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: https://www.frontiersin.org/journals/chemical-engineering#

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