Facile hydrothermal synthesis of hexapod-like two dimensional dichalcogenide NiSe₂ for supercapacitor

Hexapod-like two dimensional transition metal dichalcogenide nickel diselenide (NiSe₂) structures was synthesized by a facile hydrothermal approach and investigated its electrochemical performance as a supercapacitor electrode for the first time. The obtained material was characterized by XRD, XPS and TEM analysis. The results confirmed the presence of orthorhombic phase of NiSe₂ in the synthesized hexapod-like NiSe₂ structures. The fabricated NiSe₂ electrode on graphite foil exhibited a specific capacitance of 75 F g^-1 with good cyclic retention of 94% at a current density of 1 mA cm^-2 after 5000 charge-discharge cycles. Our results indicate that the synthesized hexapod-like NiSe₂ structures hold as a promising candidate for the supercapacitor applications.