Achieving high-performance Li6.5Sb0.5Ge0.5S5I-based all-solid-state lithium batteries
Sb-based lithium sulfide electrolytes are promising for all-solid-state lithium battery applications due to their ultrahigh Li-ion conductivity (10 S/cm) which is even comparable to current liquid electrolytes. However, the poor electrochemical stability between this electrolyte and high voltage layered structure cathode makes it difficult to achieve excellent battery performances. Herein, LiSbGeSI electrolyte with ionic conductivity up to 10 m S/cm is successfully synthesized and the electrochemical failure mechanism of the corresponding battery using bare LiNiMnCoO cathode and Li-In anode is revealed. Furthermore, LiInCl electrolyte is introduced both as an ionic additive in the cathode mixture and as an isolating layer to avoid side reactions. The designed configuration delivers a high discharge capacity of 162.7 mAh/g at 0.5C and sustains 74.5% of the capacity after 200 cycles at room temperature. Moreover, it also can reversibly cycle from -20 to 60 °C with superior battery performances. This work provides a general design strategy for utilizing highly conductive sulfide electrolytes with low stability in all-solid-state batteries.
National Key Research and Development Program[2021YFB2500200] ; National Natural Science Foundation of China ; Department of Science and Technology of Guangdong Province[2017ZT07Z479] ; China Fujian Energy Devices Science and Technology Innovation Laboratory Open Fund[21C - OP202211]
|WOS Research Area|
Materials Science, Multidisciplinary
|WOS Accession No|
Cited Times [WOS]:5
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan,430074,China
2.School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan,430074,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
Wei，Chaochao,Chen，Shaoqing,Yu，Chuang,et al. Achieving high-performance Li6.5Sb0.5Ge0.5S5I-based all-solid-state lithium batteries[J]. Applied Materials Today,2023,31.
Wei，Chaochao.,Chen，Shaoqing.,Yu，Chuang.,Wang，Ru.,Luo，Qiyue.,...&Xie，Jia.(2023).Achieving high-performance Li6.5Sb0.5Ge0.5S5I-based all-solid-state lithium batteries.Applied Materials Today,31.
Wei，Chaochao,et al."Achieving high-performance Li6.5Sb0.5Ge0.5S5I-based all-solid-state lithium batteries".Applied Materials Today 31(2023).
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