Corrosion behaviour of Cu-plate current collector under ex-situ cyclic stability testing for energy storage application

Eugene Sefa Appiah; Samuel Olukayode Akinwamide; Eric A.K. Fangnon; Kwadwo Mensah-Darkwa; Anthony Andrews; Frank Ofori Agyemang; Martinson Addo Nartey; Katlego Makgopa; Pedro Vilaça

Next Materials (Jan 2025)

Corrosion behaviour of Cu-plate current collector under ex-situ cyclic stability testing for energy storage application

Eugene Sefa Appiah,
Samuel Olukayode Akinwamide,
Eric A.K. Fangnon,
Kwadwo Mensah-Darkwa,
Anthony Andrews,
Frank Ofori Agyemang,
Martinson Addo Nartey,
Katlego Makgopa,
Pedro Vilaça

Affiliations

Eugene Sefa Appiah: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana; Department of Mechanical Engineering, Aalto University, Espoo, Finland; Department of Sustainable Mineral Resource Development, University of Energy and Natural Resources, Sunyani, Ghana; Corresponding authors at: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Samuel Olukayode Akinwamide: Department of Mechanical Engineering, Aalto University, Espoo, Finland; Centre for Nanoengineering and Advanced Materials, School of Chemical, Mining, and Metallurgy, University of Johannesburg, South Africa; Corresponding author at: Department of Mechanical Engineering, Aalto University, Espoo, Finland.
Eric A.K. Fangnon: Department of Mechanical Engineering, Aalto University, Espoo, Finland
Kwadwo Mensah-Darkwa: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana; The Brew-Hammond Energy Centre, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana; Corresponding authors at: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Anthony Andrews: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Frank Ofori Agyemang: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Martinson Addo Nartey: Department of Materials Engineering, College of Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Katlego Makgopa: Department of Chemistry, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
Pedro Vilaça: Department of Mechanical Engineering, Aalto University, Espoo, Finland

Journal volume & issue: Vol. 6
p. 100430

Abstract

Read online

This study compares the corrosion behaviour of a copper plate current collector subjected to an ex-situ cyclic stability test in a 6 M KOH and a 6 M Na2SO4 electrolyte solution for an electrochemical supercapacitor cell. Through experimental analysis, the change in microstructures resulting from the corrosion behaviour of the copper plate current collector samples are examined by employing various analytical techniques, including microscopy, spectroscopy, and surface roughness analyzer. The corrosion behaviour was studied by employing potentiodynamic polarization and electrochemical impedance spectroscopy analyses. The copper plate current collector samples analysed in 6 M KOH and 6 M Na2SO4 electrolyte solution showed uniform and localized corrosion product formation, respectively. The CU-72HRS sample recorded a corrosion potential of −608.6 mV, −628.87 mV, and −89.5 mV, −87.588 mV using both Tafel and resistance polarization data fitting analysis, respectively, for both 6 M KOH and 6 M Na2SO4 electrolyte solution using a scan rate of 5 mV/s at a voltage window of −1–1 V. Comparing the microstructural changes under various cyclic conditions provides valuable insights into the durability and reliability of copper plates as current collectors in energy storage systems. The results of this study help improve our understanding of the supercapacitor cell performance in ex-situ cyclic stability tests, assisting in the development of more efficient and durable energy storage technologies.

Published in Next Materials

ISSN: 2949-8228 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology
Website: https://www.sciencedirect.com/journal/next-materials

About the journal

Abstract

Keywords