Construction of mass-controllable mesoporous NiCo2S4 electrodes for high performance supercapacitors

Abstract

3D interconnected NiCo₂S₄ nanosheets have been directly grown on nickel foams using a facile two-step solution-based method. The as-prepared electrodes with controllable mass loadings and microstructures show excellent electrochemical performance, indicating their potential application as supercapacitors. Electrochemical measurements exhibit that the NiCo₂S₄/nickel foam electrode has a competitive areal specific capacitance (10.82 F cm⁻² at 10 mA cm⁻²), relatively high rate capability (40.3% capacitance retention at 80 mA cm⁻²) and good cycling stability (92% capacitance retention after 1500 cycles at 20 mA cm⁻²).