High-Performance Co3O4-NiO Nanosheet Electrodes for Advanced Supercapacitor Applications

The development of efficient and cost-effective electrode materials is crucial for advancing supercapacitor technology. In this study, a novel bifunctional Co3O4-NiO nanocomposite with a unique nanosheet architecture (BNS-CN) was synthesized via a simple hydrothermal method and evaluated for its supercapacitive performance. The material exhibits a well-defined crystalline structure and an enhanced surface area, which are essential for superior electrochemical activity. Comprehensive characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier-transform infrared spectroscopy (FTIR), were employed to confirm the structural and morphological properties of the BNS-CN electrode. Electrochemical assessments in a three-electrode configuration demonstrated outstanding performance, with a high specific capacitance of 800.0 F/g at 1 A/g and remarkable cycling stability, retaining 93.5% capacitance after 2000 cycles. The electrode's pseudocapacitive behavior was further validated through cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) analyses, IP 8 46 247 10 On: Mon 23 Jun 2025 13 26 33 revealing redox-active characteristics attributed to Faradaic reactions. The specific nanosheet morphology Copyright: American Sc entific Publis ers facilitated efficient ion diffusion and charge transfer, contributing to the high energy storage capability of the Delive ed by Ingenta material. These findings highlight the potential of the BNS-CN electrode as a durable and cost-efficient solution for next-generation supercapacitors, bridging the gap between high energy and power density requirements in energy storage systems.