Synergistic electrochemical performance of rGO sheathed La2Mo3O12 for high-energy asymmetric supercapacitor device

Abstract

The development of sustainable energy systems is crucial to mitigate the demand for fossil fuels. The La³⁺ and Mo⁶⁺ sites have a Lewis acidic nature, which provides the higher redox reaction and the rGO will provide a larger area and effective electron acceptor and transporter, which highly prevents the recombination of electron hole pairs during the photogeneration in the La₂Mo₃O₁₂. In this manuscript, the enhancement of supercapacitor electrodes for energy storage applications involves incorporating reduced graphene oxide nanosheets with La₂Mo₃O₁₂ nanoparticles. A hydrothermal approach was utilized for the formation of rGO anchored La₂Mo₃O₁₂ nanoparticles. The fabricated electrodes exhibit a superior capacitance value in the three-electrode system. It shows that the La₂Mo₃O₁₂@rGO-10 electrode exhibits maximum capacitance values of 577 F/g at 1 A/g. Additionally, the constructed La₂Mo₃O₁₂@rGO-10//AC asymmetric capacitor device delivered a maximum capacity value of 70.66 mAh g⁻¹ with the energy and power densities of 41.87 Wh kg⁻¹ and 1422 W kg⁻¹ at 2 A/g. Moreover, it showed excellent cyclic capacity retention and efficiency of 93.5 % and 97.7 % over 5000 cycles. The concept of proof devices demonstrated the series connection of La₂Mo₃O₁₂@rGO-10//AC asymmetric capacitor device showing the successful glowing and rotation of the LED light and electric motor fan.