One-step electrodeposited Ni 3 S 2 /Co 9 S 8 /NiS composite on Ni foam as high-performance electrode for supercapacitors.
Dalton transactions (Cambridge, England : 2003)(2023)
摘要
Transition metal sulfides (TMSs) are considered as one of the promising electrode materials due to their fascinating redox reversibility and electronic conductivity. However, volume expansion during the charge/discharge process impedes their practical applications. The reasonable design of TMS electrode materials with unique morphology can improve the energy storage performance. Herein, we prepared the NiS/CoS/NiS composite that is grown on Ni foam (NF) a one-step electrodeposition process. The optimized NiS/CoS/NiS-7 shows a superhigh specific capacity of 2785.3 F g at 1 A g and remarkable rate capability. Furthermore, the as-assembled device displays a high energy density of 40.1 W h kg at a power density of 799.3 W kg and a satisfactory stability of 96.6% retention after 5000 cycles. This work provides a facile way to fabricate new TMS electrode materials for high-performance supercapacitors.
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