Nanocomposites of Transition Metal Oxides : Their Supercapacitative and Biomedical Attributes

Abstract

Transition metal oxide (TMO) nanocomposites have emerged as a versatile and multifunctional class of materials owing to their exceptional physicochemical properties, which are finely tunable through nanoscale engineering. This review explores the design, fabrication, and application of TMO-based nanocomposites in supercapacitor and biomedical domains. By integrating TMOs such as MnO2, Co3O4, NiO and Fe3O4 with polymeric, ceramic or carbonaceous matrices. These composites exhibit synergistic improvements in electrical conductivity, redox activity, mechanical strength and biocompatibility. The structural characteristics including matrix selection, nanofiller dispersion, interfacial bonding and fabrication methods such as sol-gel processing, hydrothermal synthesis and in situ polymerization are critically examined. TMO nanocomposites demonstrate significant promise in energy storage applications especially in electric double-layer capacitors (EDLCs), pseudo-capacitors, and hybrid supercapacitors due to their high specific capacitance and cyclic stability. Concurrently, their biomedical potential spans tissue engineering, drug delivery and biosensing leveraging features like antibacterial activity, porosity and surface functionality. Comprehensive characterization using techniques such as XRD, TEM, CV and EIS is essential for performance optimization. Despite existing challenges in scalability, dispersion and interface control the continued development of TMO nanocomposites holds great promise for advancing both energy and healthcare technologies