Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4767606 | Electrochimica Acta | 2017 | 35 Pages |
Abstract
A facile and cost-effective way has been developed to fabricate a unique structure of Ni3S2 and Co9S8 double-size nanoparticles decorated on rGO (coated on the surface of nickel foam (NF)) and the as-prepared rGO/Ni3S2/Co9S8 composite was directly applied as the electrode for a high-performance supercapacitor. In the absence of rGO, Co-doping Ni3S2 nanoparticles (Co-Ni3S2) were produced. Detailed electrochemical measurements showed that the rGO/Ni3S2/Co9S8 composite electrode exhibited high specific capacitance of 1929.1Â FÂ gâ1 compared to that of Co-Ni3S2 electrode of 1075.5Â FÂ gâ1 at a current density of 1Â AÂ gâ1. In addition, the rGO/Ni3S2/Co9S8 composite displayed excellent rate capability (1669.2Â FÂ gâ1 at 20Â AÂ gâ1) and good cycling ability (92.8% capacitance retention after 1000 cycles at a current density of 10Â AÂ gâ1). The enhanced electrochemical performances of rGO/Ni3S2/Co9S8 composite can be mainly attributed to the positive synergic effect of the unique structure. The facile, low-cost and novel synthesis method and outstanding performance make the rGO/Ni3S2/Co9S8 composite an ideal electrode material for the electrochemical energy storage devices.
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Authors
Yuan Chang, Yanwei Sui, Jiqiu Qi, Liyang. Jiang, Yezeng He, Fuxiang Wei, Qingkun Meng, Yunxue Jin,