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Catalytic production of impurity-free V3.5+ electrolyte for vanadium redox flow batteries

Author

Listed:
  • Jiyun Heo

    (Korea Advanced Institute of Science and Technology)

  • Jae-Yun Han

    (Korea Institute of Energy Research (KIER))

  • Soohyun Kim

    (Korea Advanced Institute of Science and Technology)

  • Seongmin Yuk

    (Korea Advanced Institute of Science and Technology)

  • Chanyong Choi

    (Korea Advanced Institute of Science and Technology)

  • Riyul Kim

    (Korea Advanced Institute of Science and Technology)

  • Ju-Hyuk Lee

    (Korea Advanced Institute of Science and Technology)

  • Andy Klassen

    (Avalon Battery)

  • Shin-Kun Ryi

    (Korea Institute of Energy Research (KIER))

  • Hee-Tak Kim

    (Korea Advanced Institute of Science and Technology
    KAIST Institute for the NanoCentury, KAIST)

Abstract

The vanadium redox flow battery is considered one of the most promising candidates for use in large-scale energy storage systems. However, its commercialization has been hindered due to the high manufacturing cost of the vanadium electrolyte, which is currently prepared using a costly electrolysis method with limited productivity. In this work, we present a simpler method for chemical production of impurity-free V3.5+ electrolyte by utilizing formic acid as a reducing agent and Pt/C as a catalyst. With the catalytic reduction of V4+ electrolyte, a high quality V3.5+ electrolyte was successfully produced and excellent cell performance was achieved. Based on the result, a prototype catalytic reactor employing Pt/C-decorated carbon felt was designed, and high-speed, continuous production of V3.5+ electrolyte in this manner was demonstrated with the reactor. This invention offers a simple but practical strategy to reduce the production cost of V3.5+ electrolyte while retaining quality that is adequate for high-performance operations.

Suggested Citation

  • Jiyun Heo & Jae-Yun Han & Soohyun Kim & Seongmin Yuk & Chanyong Choi & Riyul Kim & Ju-Hyuk Lee & Andy Klassen & Shin-Kun Ryi & Hee-Tak Kim, 2019. "Catalytic production of impurity-free V3.5+ electrolyte for vanadium redox flow batteries," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12363-7
    DOI: 10.1038/s41467-019-12363-7
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    Cited by:

    1. Manshu Kapoor & Anil Verma, 2022. "Technical benchmarking and challenges of kilowatt scale vanadium redox flow battery," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 11(5), September.

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