Direct Construction of Mesoporous Metal Sulfides via Reactive Spray Deposition Technology

A rapid one-step flame combustion deposition method was developed to fabricate the mesoporous metal sulfides directly on nickel foam without binder and template. The first-row transition metal sulfides, Co 9 S 8, Ni 3 S 4, NiCo 2 S 4, and FeS, were successfully synthesized with three-dimensional architecture, large specific surface area (around 110 m 2 g –1 ), and interconnected pore networks. The binary meso-NiCo 2 S 4 exhibited a high specific capacitance (1350 F g –1 at 10 A g –1 ), excellent rate capability, and robust cycling stability in both three-electrode half-cells and asymmetric supercapacitor. This study demonstrated a new scalable strategy to obtain mesoporous metal sulfides with high electrochemical performance.