Single-step microwave mediated synthesis of the CoS2 anode material for high rate hybrid supercapacitors

The energy density of a hybrid supercapacitor having CoS₂ against activated carbon was increased by direct lithiation of metal sulfide before capacitor fabrication. Lithiation augmented the energy density by two-fold at all current rates and also is responsible for maintaining the capacitance retention during cycling due to the non-depletion of lithium ions in the electrolyte.