Metal-organic framework-derived ZnCo2O4@CoMoO4 positive electrode for high-performance asymmetric supercapacitors

The development of MOF-derived metal oxide composites for electrodes has emerged as a promising strategy for enhancing the performance of asymmetric supercapacitors. These advanced materials offer significant potential in improving energy storage efficiency and stability in modern applications. In this study, we introduce a novel electrode material featuring a nanoflower-like MOF/ZnCo₂O₄@CoMoO₄. The unique MOF characteristics, including tuneable porous nature and high surface area, provide to an overall surface area of 522.734 m²g⁻¹ for the material. Due to its distinctive structure and synergic effect between multiple components of MOF/ZnCo₂O₄@CoMoO₄ electrode exhibits exceptional electrochemical performance, achieving an high specific capacitance of 2073 Fg⁻¹ at 1 Ag⁻¹ and demonstrating remarkable cyclic efficiency, retains over 97 % of its initial capacitance after 5000 cycles. The asymmetric supercapacitor achieves an energy density of 45.5 Whkg⁻¹ and a power density of 850 Wkg⁻¹. The remarkable electrochemical behaviour of the MOF/ZnCo₂O₄@CoMoO₄ nanoflower electrode positions it as a promising candidate for future energy storage applications.