Realizing long-cycling all-solid-state Li-In||TiS2 batteries using Li6+xMxAs1-xS5I (M=Si, Sn) sulfide solid electrolytes

Pushun Lu, Yu Xia, Guochen Sun, Dengxu Wu, Siyuan Wu, Wenlin Yan, Xiang Zhu, Jiaze Lu, Quanhai Niu, Shaochen Shi, Zhengju Sha, Liquan Chen, Hong Li () and Fan Wu ()
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Pushun Lu: Chinese Academy of Sciences
Yu Xia: Beijing ByteDance Technology Co Ltd
Guochen Sun: Chinese Academy of Sciences
Dengxu Wu: Chinese Academy of Sciences
Siyuan Wu: Chinese Academy of Sciences
Wenlin Yan: Chinese Academy of Sciences
Xiang Zhu: University of Science and Technology of China
Jiaze Lu: Chinese Academy of Sciences
Quanhai Niu: Tianmu Lake Institute of Advanced Energy Storage Technologies
Shaochen Shi: Beijing ByteDance Technology Co Ltd
Zhengju Sha: Beijing ByteDance Technology Co Ltd
Liquan Chen: Chinese Academy of Sciences
Hong Li: Chinese Academy of Sciences
Fan Wu: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-14

Abstract: Abstract Inorganic sulfide solid-state electrolytes, especially Li6PS5X (X = Cl, Br, I), are considered viable materials for developing all-solid-state batteries because of their high ionic conductivity and low cost. However, this class of solid-state electrolytes suffers from structural and chemical instability in humid air environments and a lack of compatibility with layered oxide positive electrode active materials. To circumvent these issues, here, we propose Li6+xMxAs1-xS5I (M=Si, Sn) as sulfide solid electrolytes. When the Li6+xSixAs1-xS5I (x = 0.8) is tested in combination with a Li-In negative electrode and Ti2S-based positive electrode at 30 °C and 30 MPa, the Li-ion lab-scale Swagelok cells demonstrate long cycle life of almost 62500 cycles at 2.44 mA cm−2, decent power performance (up to 24.45 mA cm−2) and areal capacity of 9.26 mAh cm−2 at 0.53 mA cm−2.

Date: 2023
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DOI: 10.1038/s41467-023-39686-w

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