Probing corrosion protective mechanism of 2- (4-nitrobenzylidene) malononitrile on anode for enhanced alkaline (4 M NaOH) Aluminum -air battery performance
2-n(4-nitrobenzylidene) malononitrile (Z4) is investigated in a 4 M NaOH electrolyte as a corrosion inhibitor for Al-5052 aluminum alloy. Hydrogen evolution tests, electrochemical experiments, surface analysis, and computational calculations are used to study corrosion inhibition. It turns out that...
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Veröffentlicht in: | Journal of alloys and compounds 2025-01, Vol.1010, p.178239, Article 178239 |
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Sprache: | eng |
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Zusammenfassung: | 2-n(4-nitrobenzylidene) malononitrile (Z4) is investigated in a 4 M NaOH electrolyte as a corrosion inhibitor for Al-5052 aluminum alloy. Hydrogen evolution tests, electrochemical experiments, surface analysis, and computational calculations are used to study corrosion inhibition. It turns out that the inhibitor is an effective way of protecting the aluminum alloy. Z4 and aluminum ions have a good coordination action. As a consequence of employing this Z4-containing electrolyte, the Al-air battery demonstrated enhanced electrochemical performance and well-suppressed self-corrosion. Thus, Z4 significantly increases the capacity density and energy density of Al-air batteries. The Al-air battery with 10−3 M of Z4 in the 4 M NaOH electrolyte has a capacity density of 1000 mA.h. g −1, which is 2.6 times higher than that of the 4 M NaOH electrolyte. These results suggest that managing the electrolyte composition with these additives can significantly enhance battery performance in alkaline environments. Supporting our experimental findings, in addition, the submerged surface of aluminium has been identified by scanning electron microscopy coupled with Energy Dispersive X-Ray Spectroscopy (SEM/EDS), DFT, first-principles DFTB calculations and Molecular Dynamics (MD) analyses confirmed improved anode passivation and beneficial molecular interactions, contributing to the reduction of corrosion in the Al-5052 alloy.
•Al-air battery with Z4 in 4 M NaOH achieves 2.6 × capacity, reaching 1000 mA.h.g⁻¹.•Corrosion inhibition reached 32% under experimental conditions.•Surface adsorption analyzed using SEM/EDS for detailed insights.•Theoretical data enhance understanding of experimental results. |
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ISSN: | 0925-8388 |
DOI: | 10.1016/j.jallcom.2024.178239 |