Citation: Liang Ming, Dan Liu, Qiyue Luo, Chaochao Wei, Chen Liu, Ziling Jiang, Zhongkai Wu, Lin Li, Long Zhang, Shijie Cheng, Chuang Yu. Si-doped Li₆PS₅I with enhanced conductivity enables superior performance for all-solid-state lithium batteries[J]. Chinese Chemical Letters, ;2024, 35(10): 109387. doi: 10.1016/j.cclet.2023.109387 shu

Si-doped Li₆PS₅I with enhanced conductivity enables superior performance for all-solid-state lithium batteries

Liang Ming ^{a, b, 1} ,
Dan Liu ^{c, 1} ,
Qiyue Luo ^{a, 1} ,
Chaochao Wei ^a ,
Chen Liu ^{a, *,} ,
Ziling Jiang ^a ,
Zhongkai Wu ^a ,
Lin Li ^a ,
Long Zhang ^{d, *,} ,
Shijie Cheng ^a ,
Chuang Yu ^{a, *,}

a.
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
b.
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
c.
State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
d.
College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China

liuchenhust@hust.edu.cn

longzhang2023@163.com

cyu2020@hust.edu.cn

Received Date: 7 September 2023
Revised Date: 10 October 2023
Accepted Date: 6 December 2023
Available Online: 14 December 2023

Figures(4)

Lithium argyrodites Li₆PS₅X (X = Cl, Br, I) show great potential as solid electrolytes for solid-state lithium batteries due to their high Li-ion conductivities and excellent electrode compatibility. However, the relatively low conductivity of Li₆PS₅I (10⁻⁶ mS/cm) compared to the other two compositions limits its applications. Herein, Si-doped Li_6.5P_0.5Si_0.5S₅I electrolyte is designed and synthesized with superior high conductivity of 3.6 mS/cm. Structural characterization proves the increase due to the anion disorder and volume expansion caused by Si-doping. However, the poor interfacial stability between layered oxide cathode LiNi_0.6Co_0.2Mn_0.2O₂ and Li_6.5P_0.5Si_0.5S₅I inhibits its battery performance. By introducing Li₃InCl₆ electrolyte in the configuration, the corresponding battery delivers high initial discharge capacity of 150.2 mAh/g and superior cyclability during 250 cycles at 0.5 C. This work offers design strategy to obtain Li₆PS₅I-based electrolytes for high performance solid-state batteries.
- Argyrodite electrolyte,
- Li_6.5P_0.5Si_0.5S₅I,
- All-solid-state lithium batteries,
- Stability,
- Electrochemical performance
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Si-doped Li6PS5I with enhanced conductivity enables superior performance for all-solid-state lithium batteries

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通讯作者: 陈斌, bchen63@163.com

Si-doped Li₆PS₅I with enhanced conductivity enables superior performance for all-solid-state lithium batteries