Bimetal-organic frameworks derived Co/N-doped carbons for lithium-sulfur batteries |
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| Institution: | 1. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Tianjin 300071, China;2. Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;1. Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;2. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, iChem, Xiamen University, Xiamen 361005, China;3. School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, China;4. School of Materials Science & Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA;1. College of Chemical & Biological Engineering, Zhejiang University, Hangzhou, China;2. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, USA;3. College of Materials Science & Engineering, Zhejiang University, Hangzhou, China;1. School of Chemistry and Environment, Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Guangdong Provincial Engineering Technology Research Center for Materials for Energy Conversion and Storage, South China Normal University, Guangzhou 510006, PR China;2. School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, PR China;1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, University of Science and Technology Beijing, Beijing 100083, China;1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China;2. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China |
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| Abstract: | Lithium-sulfur (Li-S) batteries have received extensive attention due to their high theoretical specific energy density. However, the utilization of sulfur is seriously reduced by the shuttle effect of lithium polysulfides and the low conductivity of sulfur and lithium sulfide (Li2S). Herein, we introduced bimetal-organic frameworks (Co/Zn-ZIF) derived cobalt and nitrogen-doped carbons (Co/N-C) into Li-S batteries through host design and separator modification. The Co/N-C in Li-S batteries effectively limits the shuttle effect through simultaneously serving as polysulfide traps and chemical catalyst. As a result, the Li-S batteries deliver a high reversible capacity of 1614.5 mAh/g and superior long-term cycling stability with a negligible capacity decay of only 0.04% per cycle after 1000 cycles. Furthermore, they have a high area capacity of 5.5 mAh/cm2. |
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| Keywords: | Lithium sulfur battery Co/Zn-ZIF Nitrogen-doped carbons Catalyst Separator modification |
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