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High-Capacity Dual-Electrolyte Aluminum–Air Battery with Circulating Methanol Anolyte

Author

Listed:
  • Pemika Teabnamang

    (Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand)

  • Wathanyu Kao-ian

    (Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand)

  • Mai Thanh Nguyen

    (Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Hokkaido 060-8628, Japan)

  • Tetsu Yonezawa

    (Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Hokkaido 060-8628, Japan
    Institute of Business-Regional Collaborations, Hokkaido University, Hokkaido 001-0021, Japan)

  • Rongrong Cheacharoen

    (Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand)

  • Soorathep Kheawhom

    (Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand
    Research Unit of Advanced Materials for Energy Storage, Chulalongkorn University, Bangkok 10330, Thailand)

Abstract

Aluminum–air batteries (AABs) have recently received extensive attention because of their high energy density and low cost. Nevertheless, a critical issue limiting their practical application is corrosion of aluminum (Al) anode in an alkaline aqueous electrolyte, which results from hydrogen evolution reaction (HER). To effectively solve the corrosion issue, dissolution of Al anode should be carried out in a nonaqueous electrolyte. However, the main cathodic reaction, known as oxygen reduction reaction (ORR), is sluggish in such a nonaqueous electrolyte. A dual-electrolyte configuration with an anion exchange membrane separator allows AABs to implement a nonaqueous anolyte along with an aqueous catholyte. Thus, this work addresses the issue of anode corrosion in an alkaline Al–air flow battery via a dual-electrolyte system. The battery configuration consisted of an Al anode | anolyte | anion exchange membrane | catholyte | air cathode. The anolytes were methanol solutions containing 3 M potassium hydroxide (KOH) with different ratios of water. An aqueous polymer gel electrolyte was used as the catholyte. The corrosion of Al in the anolytes was duly investigated. The increase of water content in the anolyte reduced overpotential and exhibited faster anodic dissolution kinetics. This led to higher HER, along with a greater corrosion rate. The performance of the battery was also examined. At a discharge current density of 10 mA·cm −2 , the battery using the anolyte without water exhibited the highest specific capacity of 2328 mAh/g Al , producing 78% utilization of Al. At a higher content of water, a higher discharge voltage was attained. However, due to greater HER, the specific capacity of the battery decreased. Besides, the circulation rate of the anolyte affected the performance of the battery. For instance, at a higher circulation rate, a higher discharge voltage was attained. Overall, the dual-electrolyte system proved to be an effective approach for suppressing anodic corrosion in an alkaline Al–air flow battery and enhancing discharge capacity.

Suggested Citation

  • Pemika Teabnamang & Wathanyu Kao-ian & Mai Thanh Nguyen & Tetsu Yonezawa & Rongrong Cheacharoen & Soorathep Kheawhom, 2020. "High-Capacity Dual-Electrolyte Aluminum–Air Battery with Circulating Methanol Anolyte," Energies, MDPI, vol. 13(9), pages 1-14, May.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:9:p:2275-:d:354079
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    References listed on IDEAS

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    1. Jaechan Ryu & Haeseong Jang & Joohyuk Park & Youngshin Yoo & Minjoon Park & Jaephil Cho, 2018. "Seed-mediated atomic-scale reconstruction of silver manganate nanoplates for oxygen reduction towards high-energy aluminum-air flow batteries," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    2. Yuxin Zuo & Ying Yu & Chuncheng Zuo & Chuanlong Ning & Hao Liu & Zhiqing Gu & Qianqian Cao & Ciming Shen, 2019. "Low-Temperature Performance of Al-air Batteries," Energies, MDPI, vol. 12(4), pages 1-10, February.
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    Cited by:

    1. Feng, Shan & Yang, Guandong & Zheng, Dawei & Rauf, Abdur & Khan, Ubaid & Cheng, Rui & Wang, Lei & Wang, Wentao & Liu, Fude, 2022. "A high-performance tri-electrolyte aluminum-air microfluidic cell with a co-laminar-flow-and-bridging-electrolyte configuration," Applied Energy, Elsevier, vol. 307(C).

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