Two-step electrodeposition synthesis of NiCo2S4/MoSx composite on nickel foam as electrodes for supercapacitors

This work reports a simple, eco-benign, pollution-free two-step electrodeposition technology to prepare NiCo2S4/MoSx composites on nickel foam (NF). It was then employed as electrodes for all-solid symmetric supercapacitors. The NiCo2S4/ MoSx/NF composite can provide a superior specific capacity of 1494.52 F/g at 1 A/g, and also deliver good stability of similar to 93.03% after 1000 cycles. The NiCo2S4/MoSx/NF was assembled as the positive and negative electrodes of an all-solid symmetric supercapacitor (NiCo2S4/MoSx/NF // NiCo2S4/ MoSx/NF). This assembly exhibits an energy density of 32.54 Wh/kg with the power density 285.72 W/kg, and superior cycle life retention rate of 84.46% and Coulombic efficiency of 100% after 1000 charge -dis-charge cycles, respectively. The excellent electrochemical property of the NiCo2S4/MoSx/NF composite is ascribed to the synergistic effect between the MoSx and NiCo2S4, suggesting it has excellent prospects as an electrode for supercapacitors. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

This work presents a simple and eco-friendly two-step electrodeposition method to prepare NiCo2S4/MoSx composites. The composites exhibit high specific capacity and good stability, making them promising electrodes for all-solid symmetric supercapacitors.