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research article

An enhanced-performance Al-air battery optimizing the alkaline electrolyte with a strong Lewis acid ZnCl2

Wei, Manhui
•
Wang, Keliang
•
Pei, Pucheng
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October 15, 2022
Applied Energy

Al-air batteries are regarded as the potential energy conversion systems due to the ultra-high theoretical specific ca-pacity of 2980 mAh/g and specific energy of 8100 mWh/g for Al anodes. However, the anodic self-corrosion has severely limited the energy efficiency, which induces a great challenge to the commercial penetration of Al-air batteries. Here, we present an alkaline electrolyte optimization with a single inorganic Zn-compound, where a strong Lewis acid ZnCl2 has the best modification effect for Al-air battery compared with ZnO and ZnCO3. The results demonstrate that the inhibition efficiency of Al anode is up to 83.03% under the adsorption of strong Lewis acid groups on the Zn protective film. The high specific capacity of 2322.91 mAh/g and specific energy of 2457.02 mWh/g for Al-air battery are obtained at the galvanostatic condition of 20 mA/cm(2) , and the anode efficiency is enhanced to 77.95% after ZnCl2 optimization. Moreover, the optimization mechanism is revealed, which provides a technical basis for the application of the enhanced -performance Al-air batteries in the fields of energy conversion and power supply.

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Type
research article
DOI
10.1016/j.apenergy.2022.119690
Web of Science ID

WOS:000862846000002

Author(s)
Wei, Manhui
Wang, Keliang
Pei, Pucheng
Zuo, Yayu
Zhong, Liping  
Shang, Nuo
Wang, Hengwei
Chen, Junfeng
Zhang, Pengfei
Chen, Zhuo
Date Issued

2022-10-15

Publisher

ELSEVIER SCI LTD

Published in
Applied Energy
Volume

324

Article Number

119690

Subjects

Energy & Fuels

•

Engineering, Chemical

•

Energy & Fuels

•

Engineering

•

al-air battery

•

anodic self-corrosion

•

alkaline electrolyte optimization

•

specific capacity and specific energy

•

anode efficiency

•

corrosion inhibition

•

aluminum

•

density

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

Available on Infoscience
October 24, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/191607
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