Novel multinary nanocomposite of GO/AlCrO₃/SiO₂/Mn₃O₄/SnO₂: synthesis and electrochemical performance for energy storage system

A unique nanocomposite GO/AlCrO₃/Mn₃O₄/SiO₂/SnO₂ synthesized through hydrothermal method serves as an electrode material for electrochemical supercapacitors. The material structural and optical characteristics were studied using various techniques. Interestingly, the average crystallite sizes were 16.88, 21.2, 20.81 nm for AlCrO₃, GO, and GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite, respectively. The nanocomposite displayed 16 nm spherical grains due to particle aggregation on the graphene oxide surface causing structural deviations evident in the Raman spectrum slope around 1578 cm⁻¹. FTIR spectra revealed distinctive bands at 2097 cm⁻¹ and 1523 cm⁻¹ indicating metal–oxygen bonds. UV-Vis spectra disclosed a band gap of 2.85 eV and a zeta potential of 27.9 mV signifying stability. The hybrid electrode exhibited remarkable electrochemical performance boasting a specific capacitance of 2495 Fg⁻¹ for scan rate of 10 mVs⁻¹. Given its robust performance under high current densities, enduring stability and energy efficiency the material holds significant promise as an energy storage material particularly for supercapacitors.