Electrodeposition of manganese-nickel-cobalt sulfides on reduced graphene oxide/nickel foam for high-performance asymmetric supercapacitors
作者：Uwamahoro Evariste, Guohua Jiang,* Bo Yu, Yongkun Liu, Pianpian Ma*
關鍵字：Ternary metal sulfides; electrochemical; asymmetric supercapacitor; energy storage
論文來源：期刊
具體來源：Journal of Electronic Materials
發表時間：2019年
Ternary metal sulfides are potential and attractive materials for supercapacitors (SCs). In this study, manganese-nickel-cobalt ternary sulfides (MNCS) nanosheets deposited on reduced graphene oxide/nickel foam (rGO/NF) were synthesized via a simple electrochemical approach. The obtained ternary metal sulfide (MNCS@rGO/NF) showed better electrochemical performance than its corresponding bimetal nickel-cobalt sulfides on reduced graphene oxide/nickel foam (NCS@rGO/NF), which attributed to the addition of Mn element for increasing oxidation state in the electrode. The MNCS@rGO/NF electrode material achieved a most significant specific capacitance of 1302 F g-1 at 0.5 A g-1, with an excellent rate performance and outstanding cyclic stability. In addition, an asymmetric supercapacitor using the MNCS@rGO/NFand rGO/NF as positive and negative electrodes has been fabricated, and it delivered a high energy density of 103.62 Wh kg-1 at a power density of 562.47 W kg-1 and 39.93 Wh kg-1 at a power density of 1514.78 W kg-1.