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

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)).