Facile synthesis of nanoflower shaped MnFe2O4@rGO nanocomposite for ultra-stable asymmetric supercapacitor

The innovative 1D and core–shell architecture, as well as the carbon coating, contribute to the material's enhanced electric conductivity and porous quality. Because of these benefits, the MnFe2O4@rGO electrode displays a high specific capacitance of 980 Fg−1 at 0.1 Ag−1. The MnFe2O4@rGO electrode has a capacitance retention of up to 93.9 % after 10,000 cycles, which suggests that it has outstanding long-term cycling stability. After being assembled with activated carbon (AC) to produce a MnFe2O4@C//AC device, the energy density of this MnFe2O4@C//AC device is 20.5 Wh kg−1 at a power density of 325 W kg−1.