Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5788517 | Science Bulletin | 2017 | 28 Pages |
Abstract
Ni0.5Co0.5(OH)2 nanosheets coated CuCo2O4 nanoneedles arrays were successfully designed and synthesized on carbon fabric. The core/shell nanoarchitectures directly served as the binder-free electrode with a superior capacity of 295.6 mAh gâ1 at 1 A gâ1, which still maintained 220 mAh gâ1 even at the high current density of 40 A gâ1, manifesting their enormous potential in hybrid supercapacitor devices. The as-assembled CuCo2O4@Ni0.5Co0.5(OH)2//AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 F gâ1 at 1 A gâ1 and the high energy density of 32 Wh kgâ1 at the power density of 800 W kgâ1. Furthermore, the as-assembled device also delivered excellent cycling performance (retaining 91.9% of the initial capacitance after 12,000 cycles at 8 A gâ1) and robust mechanical stability and flexibility, implying the huge potential of present hierarchical electrodes in energy storage devices.
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Authors
Chenggang Wang, Kai Guo, Weidong He, Xiaolong Deng, Peiyu Hou, Fuwei Zhuge, Xijin Xu, Tianyou Zhai,