Unveiling Zn/Ni/Co Ternary Mixed Transition Metal Oxides Composite Anchored on Graphene Oxide as A Potential Material for Supercapacitor Electrode

Ternary metal oxides continue to draw noteworthy research interest among the energy storage society owing to their remarkable attributes such as upstanding storage capability and cost-effectiveness. Despite that, reduced electrical conductivity and capacity instability tend to hamper the applicability of ternary metal oxides. This work reports a feasible approach to enhance the supercapacitive potential of ternary metal oxide (Zn-Ni-CoO) by incorporating graphene oxide (GO) conductive network. The structural, morphology, and functional groups were deduced via XRD, FESEM, EDS elemental mapping, FTIR, and BET analysis. The metal-carbon hybrid shows astounding specific capacitance value of 608 Fg^-1 at 5 mVs^-1, calculated from three-electrode cyclic voltammetry analysis, with 2 M KOH electrolyte. Significantly, the material is able to preserve 93% of its initial capacitance even after 1000 cycles. This performance is ascribed to the synergistic effect generated by the electric double layer capacitance (EDLC) properties of GO and pseudocapacitance behavior originated from Zn-Ni-CoO. Based on the research findings, Zn-Ni-Co/GO nanocomposite could serve as a favorable active material for supercapacitor electrode. (author)