Effective Nano-manufacturing of T-Nb2O5 for supercapacitor applications

Characterized by unique physical and chemical properties, metal oxide materials have garnered significant attention for research and development in energy storage device applications. In the current work, we present a simple and low-cost synthesis protocol for orthorhombic-phase niobium oxide (T-Nb2O5) electrodes, aimed at supercapacitor applications. The as-prepared T-Nb2O5 was characterized utilizing field emission scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy, confirming the formation of orthorhombic-phase T-Nb2O5 nanoparticles. Detailed electrochemical analyses were conducted on T-Nb2O5, utilizing 1 M LiOH as the electrolyte. The unique nanoparticle architecture of T-Nb2O5 offers abundant electro-active sites and enhances reaction kinetics, leading to high specific capacitance. Notably, the T-Nb2O5 electrode achieved a gravimetric capacitance of approximately 23 F g−1 at the lowest sweep rate (5 mV s−1). These findings highlight the potential of T-Nb2O5 as an effective electroactive material for supercapacitors.