Hierarchical CuCo2O4@nickel-cobalt hydroxides core/shell nanoarchitectures for high-performance hybrid supercapacitors

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2017,（16）
• 页码范围: 1122-1131
• 页数: 10页
• 语种: 英文

摘要

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 g-1 at 1 A g-1,which still maintained 220 mAh g-1 even at the high current density of 40 A g-1,manifesting their enormous potential in hybrid supercapacitor devices.The asassembled CuCo2O4@Ni0.5Co0.5(OH)2//AC hybrid supercapacitor device exhibited favorable properties with the specific capacitance as high as 90 F g-1 at 1 A g-1 and the high energy density of 32 Wh kg-1 at the power density of 800 W kg-1.Furthermore,the as-assembled device also delivered excellent cycling performance (retaining 91.9％ of the initial capacitance after 12,000 cycles at 8 A g-1) and robust mechanical stability and flexibility,implying the huge potential of present hierarchical electrodes in energy storage devices.