期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 43, 页码 21350-21359出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta08135b
关键词
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资金
- National Natural Science Funds of China [51302214]
- Xi'an Science and Technology Plan Project [201805034YD12CG18(5)]
- Shaanxi Province Key Scientific and Technological Innovation Team Plan [2013KCT-05]
In this article, a novel crystalline/amorphous Co3S4 core-shell heterostructure supported on nickel foam is fabricated through a facile method. Due to the unique structure of the crystalline Co3S4 core that provides stable mechanical support and surface-active sites and the amorphous shell that facilitates diffusion and reaction of electrolyte ions, the obtained crystalline/amorphous Co3S4 electrode shows a superior pseudocapacitive performance of 2.65 F cm(-2) (2038.5 F g(-1)) at a current density of 5 mA cm(-2) and even 1.81 F cm(-2) (1392.3 F g(-1)) at 50 mA cm(-2). In addition, the Co3S4//AC exhibits a relatively high energy density of 54.78 W h kg(-1) at a power density of 400.02 W kg(-1) and excellent cycling performance (about 94.8% capacitance retention over 32500 cycles). The kinetic analysis reveals a diffusion controlled faradaic characteristic of Co3S4 (73.21% diffusion-controlled contribution). Moreover, the fabrication process presented in this work is facile, cost-effective, and environmentally benign, offering a feasible solution for fabricating next-generation high-performance energy storage devices.
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