用于高能水系不对称超级电容器的三维花状介孔Ni@C复合材料的简便合成
Facile Synthesis of A 3D Flower-Like Mesoporous Ni@C Composite Material for High-Energy Aqueous Asymmetric Supercapacitors.
作者信息
Liu Song, An Cuihua, Zang Lei, Chang Xiaoya, Guo Huinan, Jiao Lifang, Wang Yijing
机构信息
Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
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, 3000384, P. R. China.
出版信息
Chem Asian J. 2018 Apr 16;13(8):1005-1011. doi: 10.1002/asia.201800056. Epub 2018 Mar 13.
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 m g ), 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 at 2 A g ) 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 at a power density of 750 W kg ).
采用简便经济的一锅水热法合成了一种三维花状介孔Ni@C复合材料。这种独特的三维花状Ni@C复合材料具有高比表面积（522.4 m²/g），由高度分散在介孔碳片上的镍纳米颗粒组成。系统研究了煅烧温度对Ni@C复合材料电化学性能的影响。优化后的材料（Ni@C 700）在2 A/g电流密度下表现出高比电容（1306 F/g）和优异的循环性能（5000次循环后容量保持率为96.7%）。此外，以Ni@C 700为正极、介孔碳（MC）为负极的不对称超级电容器在功率密度为750 W/kg时表现出高能量密度（60.4 W·h/kg）。
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