Electrochemical and charge-discharge properties of the electrodeposited cobalt, tungsten, and cobalt-tungsten alloy in an acidic medium

Document Type : Regular Articles

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1 Chemistry Department, faculty of Science, sohag university, sohag, egypt

2 Chemistry department faculty of science sohag university

3 Department of Chemistry, Faculty of Science, Sohag University, Sohag, Egypt. 82534

4 Chemistry Department, Faculty of Science, Sohag University

10.21608/sjsci.2025.400073.1287

Abstract

This study explores the electrochemical behavior and charge-discharge characteristics of cobalt (Co), tungsten (W), and Co–W alloy coatings electrodeposited onto copper substrates. The investigations were carried out at 25 °C in 0.1 M H₂SO₄ aqueous solution. The specific capacitance of each electrode was determined under identical conditions to evaluate and compare their electrochemical performance. Among the three types of coatings, pure cobalt prepared using the chronoamperometric method exhibited superior specific capacitance and enhanced charge-discharge behavior in the acidic environment. These results suggest that Co coatings are more effective in storing and delivering charge under the studied conditions. In contrast, tungsten coatings demonstrated a higher specific energy density compared to both pure Co and Co–W alloy coatings, indicating their potential advantage in applications requiring greater energy output. The comparative analysis highlights the influence of composition and structure on the electrochemical efficiency of the coatings, offering insights into the design of advanced electrode materials for energy storage systems.

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