Fabrication of highly efficient zinc manganese perovskite oxide for energy storage application

Researchers are exploring alternative energy resources due to decline of fossil fuels and the ensuing challenges they pose to both humanity and environment. Nonetheless, supercapacitors (SCs) represent promising energy storage approaches owed to their effective mechanisms, enhanced power delivery and outstanding cyclic lifespan. Transition metal oxides (TMOs) have been recognized to be exceptional electrode substances for high-performance supercapacitors owing to impressive conductivity and numerous active species. Still, the material’s lower energy density and insufficient rate performance pose limitations. In this work, the ZnO@ZnMnO₃ composite was prepared using a simple hydrothermal route. This unique ZnO@ZnMnO₃ composite exhibits specific capacitance (C_sp) of 1132 F g^− 1 at 1 A g^− 1, showcasing its exceptional rate performance. It also displays noteworthy energy density (E_d) of 52 W h kg^− 1 when operated at power density (P_d) of 289 W kg^− 1. In addition, synthesized material exhibits lower impedance (R_ct = 0.16) with extraordinary stability of 50 h. This effort shows valuable insights into the production of TMOs nanoparticles that exhibit outstanding performance in supercapacitor applications.