Synergistic effect of redox electrolyte and reduced graphene oxide on the electrochemical performance of LaCaCrMnO₆

The progressing energy demands worldwide have necessitated the search for advanced electrode materials for energy storage applications. In this investigation first, the cubic phase mesoporous LaCaCrMnO₆, double perovskite oxide was synthesized with a spherical morphology. Subsequently, by adding reduced graphene oxide (rGO) to LaCaCrMnO₆ mesoporous spheres via solvothermal technique, the composite material was synthesized. Electrochemical analysis showed that the rGO composite with redox electrolyte significantly improved the energy storage performance because of enhanced specific surface area (50.5 m²/g) and mitigating the detrimental effects of chromium poisoning. The LaCaCrMnO₆/rGO composite exhibited the specific capacitance of 700 F/g at 4 A/g with a retention of 77 % over 5000 cycles at 10 A/g. An asymmetric cell comprising the composite electrode and charcoal electrode further exhibited remarkable specific capacitance and retention, making it a promising cost-effective candidate for advanced energy storage applications.