NiSe2 Coupled with MnS: A Powerful Binary Composite for High-Efficiency Supercapacitor Electrodes

The search of an efficient and stable electrode material has led to the growing interest in using transition metal-based nanocomposites in supercapacitors. In this work introduces the NiSe 2 -MnS hybrid material synthesized by a low-cost solution to overcome the shortcomings of single-component systems to exploit dual-phase synergy. MnS was incorporated in NiSe 2 , which has good conductivity of electricity, and the combination of both leads to an electrochemical compound having enhanced performance. Effective formation of the NiSe 2 -MnS nanostructure with good integration was confirmed by careful structural and morphological studies. Electrochemical analysis revealed that the composite had a spectacular specific capacitance of 835 F/g in three- electrode system and 134 F/g in two- electrode set up. Interestingly, the electrode still had 85.1%, After 5,000 consecutive charge -discharge cycles at a current density of 8 A/g, the material still had a considerable fraction of its initial capacitance, which shows its excellent cycling stability. In general the NiSe 2 -MnS hybrid system is a cost effective but very efficient pathway to the future of energy storage.