Facile synthesis Mn/Co dual-doped Ni₃S₂ nanosheets for supercapacitor

Ni₃S₂ nanosheets dual-doped with manganese, cobalt elements on conductive nickel foam (MC-Ni₃S₂) had been synthesized by two steps hydrothermal and directly applied as the electrode for high-performance electrochemical Supercapacitors (SCs). A plausible mechanism is proposed to explain the formation of the manganese, cobalt elements dual-doped Ni₃S₂ nanosheets. SCs electrodes based on the MC-Ni₃S₂ nanosheets are characterized and exhibit a specific capacitance of 2922 F g⁻¹ (365.3 mAh g⁻¹) at 2 A g⁻¹. After 2000 cycles, it exhibited an excellent cycling stability owing to the unique nanosheets architecture providing fast ion/electron transfer. The fabricate approach may offer a new strategy for the synthesis of other mix transition metal sulfide for applications in supercapacitor.