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

IF 10.1 1区工程技术 Q1 ENERGY & FUELS

Applied Energy Pub Date : 2022-10-15 DOI:10.1016/j.apenergy.2022.119690

Manhui Wei , Keliang Wang , Pucheng Pei , Yayu Zuo , Liping Zhong , Nuo Shang , Hengwei Wang , Junfeng Chen , Pengfei Zhang , Zhuo Chen

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引用次数: 8

Abstract

Al-air batteries are regarded as the potential energy conversion systems due to the ultra-high theoretical specific capacity 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/cm², 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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一种以强Lewis酸ZnCl2优化碱性电解质的高性能铝空气电池

铝空气电池具有2980 mAh/g的超高理论比容量和8100 mWh/g的比能量，被认为是一种势能转换系统。然而，阳极自腐蚀严重限制了铝空气电池的能量效率，这给铝空气电池的商业化普及带来了很大的挑战。本文提出了一种基于单一无机锌化合物的碱性电解液优化方法，其中强Lewis酸ZnCl2对铝空气电池的改性效果优于ZnO和ZnCO3。结果表明，在强Lewis酸基团在Zn保护膜上的吸附作用下，铝阳极的缓蚀效率可达83.03%。在恒流条件为20 mA/cm2时，铝空气电池的比容量达到2322.91 mAh/g，比能量达到2457.02 mWh/g，优化后的阳极效率达到77.95%。揭示了优化机理，为高性能铝空气电池在能量转换和电源领域的应用提供了技术基础。

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来源期刊

Applied Energy 工程技术-工程：化工

CiteScore

21.20

自引率

10.70%

发文量

1830

审稿时长

41 days

期刊介绍： Applied Energy serves as a platform for sharing innovations, research, development, and demonstrations in energy conversion, conservation, and sustainable energy systems. The journal covers topics such as optimal energy resource use, environmental pollutant mitigation, and energy process analysis. It welcomes original papers, review articles, technical notes, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gap between research, development, and implementation. The journal addresses a wide spectrum of topics, including fossil and renewable energy technologies, energy economics, and environmental impacts. Applied Energy also explores modeling and forecasting, conservation strategies, and the social and economic implications of energy policies, including climate change mitigation. It is complemented by the open-access journal Advances in Applied Energy.