a Department of Physics, Noorul Islam Centre for Higher Education, Kumaracoil, Thuckalay, 629180, TamilNadu, India.

Hybrid nanocomposites with enhanced electrochemical performance have drawn considerable interest in the area of high-performance energy storage systems. Here, we demonstrate the effective preparation of a multifunctional BN@α-Fe2O3/GO composite through a hydrothermal synthesis process, with the structural stability of boron nitride (BN), redox property of hematite (α-Fe2O3), and remarkable conductivity and surface area of graphene oxide (GO). The structural and morphological properties supported the successful integration and uniform distribution of the constituent materials, ensuring enhanced electrochemical behaviors. BN@α-Fe2O3/GO composite exhibits exceptional specific capacitance at varying current densities: 1001.2 F/g at 3Ag-1, 971.5 F/g at 4 Ag-1, 815.9 F/g at 5 Ag-1, and 808.78 F/g at 7 Ag-1, respectively, highlighting its viability as a high- performing electrode component for electrochemical devices. Furthermore, this composite delivers excellent cyclic stability and rate capability, retaining 82.7% of its capacitance around l0000 cycles. The resultant BN@α-Fe2O3/GO composite displays a power density of 750W kg-1 with an energy density of 34.76Wh kg-1. These remarkable findings reflect the superior charge storage efficiency and rapid energy delivery capability of the composite.

The structural integrity of BN@α-Fe2O3/GO hybrid composites is because of the synergistic combination of BN, α-Fe2O3, and GO, thus promoting efficient ion transport and diffusion mechanisms. The exceptional electrochemical behavior exhibited by BN@α-Fe2O3/GO composites is a result of this combination, indicating its suitability as electrode materials for supercapacitor applications.