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chlorine-rich lithium argyrodites enables superior performances for solid-state Li-Se batteries at wide temperature range

引用

Rare Metals 2022年第12期41卷 4065-4074页

作者： Jin-Yan Lin Shuai Chen Jia-Yang Li Dian Yu Xiang-Ling Xu Chuang Yu Shao-Qing Chen Xue-Fei Miao Lin-Feng Peng Chao-Chao Wei Chong-Xuan Liu Shi-Jie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Materials Huazhong University of Science and TechnologyWuhan 430074China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Advanced Metallic and Intermetallic Materials Technology School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

All-solid-state Li-Se battery shows great potential as a candidate for next-generation energy storage devices due to its high energy density and ***,the low ionic conductivity of the solid electrolytes and large volume changes of Se active materials are two of the major issues that limit its ***,a simple solid-state reaction method is applied to synthesize chlorine-rich argyrodite Li_(5.5)PS_(4.5)CI_(1.5)electrolyte with high conductivity of 6.25 mS·cm^(-1)at room *** nanotube(CNT)is introduced as the host for Se to obtain Se/CNT composite with both enhanced electronic conductivity and lower volume expansion during the electrochemical reaction ***-solid-state Li-Se battery using Li_(5.5)PS_(4.5)CI_(1.5)as solid electrolyte combined with Se/CNT cathode and Li-In anode shows a discharge capacity of 866 mAh·g-1for the 2nd cycle under0.433 mA·cm-2at room ***,the assembled battery delivers a high discharge capacity of1026 mAh·g^(-1)for the 2nd cycle when cycled at the same current density at 60℃and maintains a discharge capacity of 380 mAh·g^(-1)after 150 *** to the high Li-ion conductivity of Li_(5.5)PS_(4.5)CI_(1.5)electrolyte,the assembled battery displays a high discharge capacity of 344 mAh·g^(-1)under 0.113 mA·cm^(-2)at-20℃C and remains 66.1%after200 *** addition,this all-solid-state Li-Se battery shows ultralong cycling performances up to 1000 cycles under 0.433 mA·cm^(-2)at-20℃.This work offers the design clue to fabricate the all-solid-state Li-Se battery workable at different operating temperatures with an ultralong cycling life.

关键词： Lithium argyrodite chlorine-rich All-solidstate Li-Se batteries Operating temperatures Long cycling performances

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