Theoretical investigation of quantum capacitance of Co-doped α-MnO for supercapacitor applications using density functional theory.

The rapid depletion of fossil fuels and ever-growing energy demand have led to a search for renewable clean energy sources. The storage of renewable energy calls for immediate attention to the fabrication of efficient energy storage devices like supercapacitors (SCs). As an electrode material for SCs, MnO has gained wide research interest because of its high theoretical capacitance, variable oxidation state, vast abundance, and low cost.