Influence of Deposition Potential on Electrodeposited Bismuth–Copper Oxide Electrodes for Asymmetric Supercapacitor

The modern research reported the simplest low–cost synthesis of Bismuth–Copper oxide (Bi 2 CuO 4 ) with spruce–leaf–like morphology and its applications in supercapacitor devices. Bi (NO 3 ) 3 . 5H 2 O was used as a precursor during an electrodeposition (ED) method to create the spruce–leaf–like Bi 2 CuO 4 electrode. XRD, XPS, FE−SEM, EDX, and TEM were used to characterize the structures and morphologies of the synthesized materials, while CV, CP, and EIS were used to determine their electrochemical characteristics. The Bi 2 CuO 4 phase was confirmed by XRD patterns, and electrochemical testing demonstrated that the material had better rate capability and an SC of 431.2 F/g at a scan rate of 2 mV/s. After 5,000 cycles, it retained 81.4 % of its energy. Additionally, the maximum SC that was attained by the created asymmetric solid–state device ASSD (Bi 0.6 V ǀǀ1 M PVA−KOHǀǀAC) was 73.7 F/g. The energy density was 55.3 Wh/Kg at a power density of 4570 W/Kg. The exceptional electrochemical performance of Bi 2 CuO 4 thin film electrodes recommends it has a promising material.