Self-Assembled Three-Dimensional Macroporous Co2(OH)3Cl-MnO2 Spheres Synthesized by Microwave-Assisted Method: A New Hybrid for High-Performance Asymmetric Supercapacitors
作者： Weize Yang , Jianzhong Zheng , Shirong Hu , Wuxiang Zhang , Chan Wei
DOI: 10.1021/ACSSUSCHEMENG.6B02864
关键词: Chemical engineering 、 Power density 、 Morphology (linguistics) 、 Nanotechnology 、 Hybrid material 、 Self assembled 、 SPHERES 、 Supercapacitor 、 Electrode 、 Materials science 、 Capacitance
摘要: Three-dimensional (3D) Co2(OH)3Cl-MnO2 hybrid sphere was first obtained through a facile solvothermal microwave-assisted synthesis method. Because of the 3D structure with flowerlike morphology built up by nanosheets, this type accelerated ion transfer as well charge and simultaneously maximized electroactivity Co2(OH)3Cl or MnO2 high capacitance 942.2 F g–1, which greater than that single MnO2. Meanwhile, an asymmetric supercapacitor device assembled active carbon (AC) positive negative electrodes, yielded specific 49.26 g–1 energy density 12.62 Wh kg–1 at power 679.10 W kg–1. In addition, retained 83.77% after 5000 cycles, showed well-defined, long cycle life.
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