학술논문
The electrochemical characteristics of commercial aluminium alloy electrodes for Al/air batteries.
Document Type
Article
Author
Source
Subject
*CORROSION in alloys
*ALUMINUM alloys
*ALUMINUM batteries
*ELECTROCHEMISTRY
*ELECTROLYTES
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Language
ISSN
0021-891X
Abstract
To develop new materials for Al/air batteries, the evaluation and characterisation of commercial aluminium alloys, namely, Al2000, Al2000Clad and Al7000, as anodes in alkaline electrolyte batteries has been performed. Their self-corrosion rate, hydrogen evolution rate and electrochemical properties, including open circuit potentials, polarisation characteristics and potentiodynamic measurements, were examined in a 4 M KOH solution. Among the tested alloys, Al2000 was found to be the most promising because it exhibits a high open circuit potential, a good anode efficiency and a minimum corrosion rate. Al2000/NiOOH and Al2000/air batteries were tested. Electrolyte concentrations between 0.01 and 4 M KOH were studied, and discharge currents between 0.8 and 20 mA cm were imposed to analyse the evolution of the E. Conversely, the Al7000 alloy exhibited the highest corrosion rate and H evolution compared to the other alloys. [ABSTRACT FROM AUTHOR]