Volume 44, Issue 13 pp. 10652-10661
RESEARCH ARTICLE

Ultrahigh voltage and energy density aluminum-air battery based on aqueous alkaline-acid hybrid electrolyte

Hejing Wen

Hejing Wen

School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

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Zhongsheng Liu

Corresponding Author

Zhongsheng Liu

School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

Correspondence

Zhongsheng Liu, Guanjun Qiao and Jianhong Yang, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China.

Email: [email protected] (Z. L.), [email protected] (G. Q.) and [email protected] (J. Y.)

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Jia Qiao

Jia Qiao

School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

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Ronghua Chen

Ronghua Chen

School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

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Guanjun Qiao

Corresponding Author

Guanjun Qiao

School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

Correspondence

Zhongsheng Liu, Guanjun Qiao and Jianhong Yang, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China.

Email: [email protected] (Z. L.), [email protected] (G. Q.) and [email protected] (J. Y.)

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Jianhong Yang

Corresponding Author

Jianhong Yang

School of Materials Science and Engineering, Jiangsu University, Zhenjiang, China

Correspondence

Zhongsheng Liu, Guanjun Qiao and Jianhong Yang, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China.

Email: [email protected] (Z. L.), [email protected] (G. Q.) and [email protected] (J. Y.)

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First published: 20 July 2020
Citations: 24

Funding information: Basic Research Program of Jiangsu Education Department, Grant/Award Number: 18KJB430010; National Natural Science Foundation of China, Grant/Award Number: 51904118; Senior Talent Foundation of Jiangsu University, Grant/Award Numbers: 402300047, 5501670001

Summary

Thanks to the high theoretical capacity and energy density, abundant resource, low-cost, and environmental friendliness, aluminum-air battery (AAB) has attracted research interests driven by the promise for electricity generator. However, low operating voltage leads to low practical energy density, and restricting the applications of AAB. In this study, the concept of an ultrahigh voltage AAB based on aqueous alkaline-acid hybrid electrolyte is introduced and demonstrated. Meanwhile, the working mechanism is investigated. And the open-circuit voltage of the novel designed battery is 2.56 V, 29.9% higher than conventional alkaline AAB. Thanks to the fluid electrolyte, the decline in discharge voltage caused by the change in pH is overcome. And a high-energy density of 4591 mWh gAl−1 is achieved at a discharge voltage of around 2.08 V at 10 mA cm−2. These results provide a viable approach to improve the performance of Al-air battery.

CONFLICT OF INTEREST

The authors declare no conflicts of interest.

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