Nickel-Manganese bimetallic Selenide as an electrode for supercapcitor applications

Evolving efficient electrochemically active nanostructures from earth-abundant transition metals have procured remarkable interest in recent years. In comparison with different transition metals, nickel (Ni) and manganese (Mn) are generous electrocatalysts for the energy storage applications. Herein, for the first-time Ni-Mn diselenide nanoparticles with spherical morphology were prepared by simple hydrothermal method with different concentrations of Ni and Mn. Powder X-ray diffraction (XRD) patterns confirmed the cubic phase of NiMnSe2. High resolution scanning electron microscopy (HR-SEM) confirmed the spherical morphology of synthesized NiMnSe2 nanoparticles. As a result, the Ni0.75Mn0.25Se2 exhibited an excellent electrochemical behaviour with specific capacitance of 1490F/g.