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Hierarchical CuCo_2O_4@nickel-cobalt hydroxides core/shell nanoarchitectures for high-performance hybrid supercapacitors

查看全文 作　　者：Chenggang [1]Wang;Kai [2]Guo;Weidong [1]He;Xiaolong [1]Deng;Peiyu [1]Hou;Fuwei [2]Zhuge;Xijin [1]Xu;Tianyou [2]Zhai 高影响力作者 机构地区：[1]School of Physics and Technology,University of Jinan;[2]State Key Laboratory of Material Processing and Die & Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology(HUST)高影响力机构 出　　处：《Science Bulletin》索引2017年第62卷第16期,共10页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (51672109,21505050);Natural Science Foundation of Shandong Province for Excellent Young Scholars (ZR2016JL015);the National Basic Research Program of China (2015CB932600);the Program for Huazhong University of Science and Technology (HUST) Interdisplinary Innovation Team (2015ZDTD038);the Fundamental Research Funds for the Central University 摘　　要：Ni_(0.5)Co_(0.5)(OH)_2 nanosheets coated CuCo_2O_4 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 g^(-1) at 1 Ag^(-1), which still maintained 220 mAh g^(-1) even at the high current density of 40 Ag^(-1), manifesting their enormous potential in hybrid supercapacitor devices. The asassembled CuCo_2O_4@Ni_(0.5)Co_(0.5)(OH)_2//AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 Fg^(-1) at 1 Ag^(-1) and the high energy density of 32 Wh kg^(-1) at the power density of 800 Wkg^(-1). Furthermore, the as-assembled device also delivered excellent cycling performance(retaining 91.9% of the initial capacitance after 12,000 cycles at 8 Ag^(-1)) and robust mechanical stability and flexibility, implying the huge potential of present hierarchical electrodes in energy storage devices. 关 键 词：混合超级电容器 核/壳结构 循环性能 氢氧化物 壳高 镍钴 碳纤维织物 高电流密度
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