期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 49, 期 2, 页码 922-930出版社
SPRINGER
DOI: 10.1007/s11664-019-07810-6
关键词
Ternary metal sulfides; electrochemical; asymmetric supercapacitor; energy storage
Ternary metal sulfides are potential and attractive materials for supercapacitors. Manganese-nickel-cobalt ternary sulfide (MNCS) nanosheets deposited on reduced graphene oxide/nickel foam (rGO/NF) have been synthesized via a simple electrochemical approach. The obtained ternary metal sulfide (MNCS@rGO/NF) showed better electrochemical performance than corresponding bimetal nickel-cobalt sulfides on reduced graphene oxide/nickel foam (NCS@rGO/NF), which can be attributed to the addition of manganese to increase the oxidation state in the electrodes. The MNCS@rGO/NF electrode material achieved a significant specific capacitance of 1302 F g(-1) at 0.5 A g(-1), with good rate performance and cyclic stability. In addition, asymmetric supercapacitor devices using the MNCS@rGO/NF and rGO/NF as positive and negative electrodes were fabricated, delivering high energy density of 103.62 Wh kg(-1) at power density of 562.47 W kg(-1) and 39.93 Wh kg(-1) at power density of 1514.78 W kg(-1).
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