Engineering PPy decorated MnCo2O4 urchins for quasi-solid-state hybrid capacitors

Abstract

In this work, three dimensional PPy decorated MnCo₂O₄ urchins on Ni foam are fabricated via a hydrothermal strategy and an electro-polymerization process. The as-synthesized products are utilized as the electrode materials for hybrid capacitors. Due to the synergistic effect of PPy and MnCo₂O₄, the hybrid electrode exhibits excellent charge transport ability and cycling stability. The as-assembled device presents remarkable electrochemical performance with a high energy density of 0.785 mW h cm⁻³ at a power density of 7.49 W cm⁻³ and a maximum power density of 37.49 W cm⁻³ at an energy density of 0.488 mW h cm⁻³. The electrode materials reported here might present potential applications in next generation energy storage devices.