Core–Shell Carbon‐Coated CuO Nanocomposites: A Highly Stable Electrode Material for Supercapacitors and Lithium‐Ion Batteries |
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| Authors: | Dr Tao Wen Dr Xi‐Lin Wu Dr Shouwei Zhang Prof Xiangke Wang Prof An‐Wu Xu |
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| Institution: | 1. School for Radiological and Interdisciplinary Sciences (RAD‐X), Soochow University, Suzhou, 215123 (P.R. China);2. Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions (P.R. China);3. Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei (P.R. China);4. Division of Nanomaterials and Chemistry, Hefei National, Laboratory for Physical Sciences at Microscale Department, University of Science and Technology of China, 230026 Hefei (P.R. China);5. Faculty of Engineering, King Abdulaziz University, Jeddah 21589 (Saudi Arabia) |
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| Abstract: | Herein we present a simple method for fabricating core–shell mesostructured CuO@C nanocomposites by utilizing humic acid (HA) as a biomass carbon source. The electrochemical performances of CuO@C nanocomposites were evaluated as an electrode material for supercapacitors and lithium‐ion batteries. CuO@C exhibits an excellent capacitance of 207.2 F g?1 at a current density of 1 A g?1 within a potential window of 0–0.46 V in 6 M KOH solution. Significantly, CuO electrode materials achieve remarkable capacitance retentions of approximately 205.8 F g?1 after 1000 cycles of charge/discharge testing. The CuO@C was further applied as an anode material for lithium‐ion batteries, and a high initial capacity of 1143.7 mA h g?1 was achieved at a current density of 0.1 C. This work provides a facile and general approach to synthesize carbon‐based materials for application in large‐scale energy‐storage systems. |
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| Keywords: | biomass copper core– shell structures energy storage nanotechnology |
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