The application of transition metal sulfide Ni3S4/CNFs in rechargeable Ni–Zn batteries

Abstract

Transition metal nickel sulfide is widely used in supercapacitors and Li–S batteries due to its excellent capacity, low cost, and environmental friendliness. This article is a continuation of our previous studies, where the hydrothermal method was used to grow Ni₃S₄ on the carbon nanofiber network. The physicochemical properties of Ni₃S₄/CNFs were characterized by XRD, SEM, and XPS methods. Afterward, a Ni–Zn battery was assembled, and its electrochemical properties were analyzed using an electrochemical workstation and a Land system. The discharge specific capacity reached 215 mA h g⁻¹ at a current density of 5 A g⁻¹. After 100 cycles, the battery retained a specific discharge capacity of 176 mA h g⁻¹ and a retention rate of around 82%. A series of tests indicated that the application of Ni₃S₄/CNFs in aqueous rechargeable Ni–Zn batteries is a feasible and promising approach.