In this work, we describe surfactant-assisted chemical co-precipitation methodology for the synthesis of strontium hexaferrite (SrFe12O19). Various physicochemical techniques were used to confirm the formation of SrFe12O19 particles. The XRD and SEM analyses confirmed the M-type strontium hexaferrite spheres were formed. The as-prepared SrFe12O19 particles were utilized as electrode material in supercapacitors. As a result, SrFe12O19 delivered a maximum specific capacity (Csp) of 1085 C/g at 1 A/g, and reserved 96.0 % of its specific capacity even after 6000 GCD cycles. As an outcome, the SrFe12O19 sample was used to construct an asymmetric SrFe12O19//AC device, which exhibited an energy density of 13.8 Wh/kg for the power density of 496.8 W/kg. The unique structural features and multiple redox sites and increased electrical conductivity of SrFe12O19 lead to its excellent capacity behavior. Thus, it is clear that SrFe12O19 microspheres can be exploited as electrode material in high-performance supercapacitor devices for real-time applications.

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