Unique Cobalt Sulfide/Reduced Graphene Oxide Composite as an Anode for Sodium‐Ion Batteries with Superior Rate Capability and Long Cycling Stability |
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| Authors: | Shengjie Peng Xiaopeng Han Linlin Li Zhiqiang Zhu Fangyi Cheng Madhavi Srinivansan Stefan Adams Seeram Ramakrishna |
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| Affiliation: | 1. Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore;2. Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin, China;3. School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore;4. TUM CREATE, Singapore, Singapore;5. Key Laboratory of Advanced Energy Materials Chemistry (KLAEMC), Collaborative Innovation Center of Chemical Science and Engineering, Chemistry College, Nankai University, Tianjin, China;6. Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore |
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| Abstract: | Exploitation of high‐performance anode materials is essential but challenging to the development of sodium‐ion batteries (SIBs). Among all proposed anode materials for SIBs, sulfides have been proved promising candidates due to their unique chemical and physical properties. In this work, a facile solvothermal method to in situ decorate cobalt sulfide (CoS) nanoplates on reduced graphene oxide (rGO) to build CoS@rGO composite is described. When evaluated as anode for SIBs, an impressive high specific capacity (540 mAh g?1 at 1 A g?1), excellent rate capability (636 mAh g?1 at 0.1 A g?1 and 306 mAh g?1 at 10 A g?1), and extraordinarily cycle stability (420 mAh g?1 at 1 A g?1 after 1000 cycles) have been demonstrated by CoS@rGO composite for sodium storage. The synergetic effect between the CoS nanoplates and rGO matrix contributes to the enhanced electrochemical performance of the hybrid composite. The results provide a facile approach to fabricate promising anode materials for high‐performance SIBs. |
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| Keywords: | chalcogenides cobalt composites electrochemistry sodium‐ion batteries anode materials |
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