期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 1, 页码 173-182出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta07965a
关键词
-
资金
- National Natural Science Foundation of China [61176058, 61404066]
Rational design and synthesis of core/shell nanostructures as binder-free electrodes has been believed to be an effective strategy to improve the electrochemical performance of supercapacitors. In this work, hierarchical ZnCo2O4@NixCo2x(OH)(6x) core/shell nanowire arrays (NWAs) have been successfully constructed by electrodepositing NixCo2x(OH)(6x) nanosheets onto hydrothermally grown ZnCo2O4 nanowires and investigated as a battery-type electrode for hybrid supercapacitors. Taking advantage of the hierarchical core/shell structures and the synergetic effect between ZnCo2O4 nanowires and NixCo2x(OH)(6x) nanosheets, the optimised core/shell electrode exhibits remarkable electrochemical performance with a high areal capacity (419.1 mu A h cm(2)), good rate capability and cycling stability. Moreover, the assembled ZnCo2O4@NixCo2x(OH)(6x)//activated carbon (AC) hybrid device can be reversibly cycled in a large potential range of 0-1.7 V and deliver a maximum energy density of 26.2 W h kg(-1) at 511.8 W kg(-1). Our findings indicate that the hierarchical ZnCo2O4@NixCo2x(OH)(6x) core/shell NWAs have great potential for applications in energy storage devices.
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