Facile Synthesis of A 3D Flower‐Like Mesoporous Ni@C Composite Material for High‐Energy Aqueous Asymmetric Supercapacitors |
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| Authors: | Dr Song Liu Dr Cuihua An Dr Lei Zang Xiaoya Chang Huinan Guo Prof Dr Lifang Jiao Prof Dr Yijing Wang |
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| Institution: | 1. Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin, P.?R. China;2. Institute for New Energy Materials and Low-Carbon Technologies, Tianjin Key Laboratory of Advanced Functional Porous Materials, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, P.?R. China;3. Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin, P.?R. China |
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| Abstract: | A 3D flower‐like mesoporous Ni@C composite material has been synthesized by using a facile and economical one‐pot hydrothermal method. This unique 3D flower‐like Ni@C composite, which exhibited a high surface area (522.4 m2 g?1), consisted of highly dispersed Ni nanoparticles on mesoporous carbon flakes. The effect of calcination temperature on the electrochemical performance of the Ni@C composite was systematically investigated. The optimized material (Ni@C 700) displayed high specific capacity (1306 F g?1 at 2 A g?1) and excellent cycling performance (96.7 % retention after 5000 cycles). Furthermore, an asymmetric supercapacitor (ASC) that contained Ni@C 700 as cathode and mesoporous carbon (MC) as anode demonstrated high energy density (60.4 W h kg?1 at a power density of 750 W kg?1). |
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| Keywords: | electrochemistry mesoporous materials nanoparticles nickel supercapacitors |
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