Work

Electrodeposition of CuNiS as battery type electrode for supercapacitor applications

Year: 2025

Type: article

Abstract: The increasing needs for portable energy has led to an increasing interest in energy storage technologies with high energy density and fast charge-discharge properties. This interest necessitates the development of electrode materials with high energy density for supercapacitors with fast charge-discharge capability compared to batteries. This study is related to the production of high-performance, binder-free electrodes on nickel foam by simple cathodic electrodeposition using nickel chloride, copper sulfate, and thiourea solution as aqueous electrolytes. The CuS, NiS, and NiCuS electrodes synthesized by cathodic electrodeposition were characterized by X-ray diffraction and energy dispersive spectra as well as scanning electron microscopy. The electrochemical performance of the synthesized positive electrodes was investigated in aqueous potassium hydroxide electrolyte by common electroanalytical techniques such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge. Electrochemical tests of the synthesized electrode materials showed that they exhibited significant reversible redox reactions. Among the produced electrodes, CuNiS exhibited high specific capacitance (1026.9 F g-1 at 5 mV s-1; 1338.5 F g-1 at 1 A g-1 current density). The produced NiCuS//activated carbon supercapacitor achieved 890 W kg-1 power and 14.9 Wh kg-1 energy density in the potential range from 0 to 1.40 volts and reached 157.8% of the initial discharge capacity at the end of 5000 charge-discharge cycles. The results of this study indicate that the electrodes produced by the cathodic electrochemical deposition method have excellent potential for use as positive electrodes in supercapacitor applications.

Source: Electrochemistry Communications

DOI: 10.1016/j.elecom.2025.108024

Authors: Davut Uzun, Ahsen Albaş, Seyfullah Madakbaş, Ece Kök Yetimoğlu

Institution: Marmara University

Language: English

Topic: Supercapacitor Materials and Fabrication

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,630