☆ 4.7 Article

Deformation-driven modification of Al-Li-Mg-Zn-Cu high-alloy aluminum as anodes for primary aluminum-air batteries

SCRIPTA MATERIALIA (2022)

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Journal

SCRIPTA MATERIALIA
Volume 212, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.114551

Keywords

Aluminum-air batteries; Severe plastic deformation; Anodes; Corrosion

Categories

Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

Funding

  1. Heilongjiang Postdoc-toral Foundation [LBH-Z20055]
  2. National Natural Sci-ence Foundation of China [52175301]

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In this study, a deformation-driven modified high-alloy aluminum was proposed as an anode for primary aluminum-air batteries. The alloy exhibited homogeneous microstructures and suppressed self-corrosion, leading to improved power and energy densities of the batteries.
Aiming at high-energy-density off-grid application, severe plastic deformation-modified Al-Li-Mg-Zn-Cu high-alloy aluminum obtained by deformation-driven modification was proposed to serve as anodes for primary aluminum-air batteries. Homogeneous microstructures induced by the fragmentation of second phases and dynamic recrystallization suppressed the formation of the hydroxides-eutectic skeletons to isolate anodes from alkaline electrolytes. The alloying elements contributed to the inhibition of hydrogen evolution self-corrosion, the mitigation of polarization, and the enhancement of the discharge voltage. The self-corrosion rate was only one-seventh of the 5N pure aluminum. The power and energy densities reached 88.3 mW cm(-2) and 2.73 Wh g(-1), respectively, which is better than those of pure aluminum (c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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