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Modeling the Performance of a Zinc/Bromine Flow Battery

Author

Listed:
  • Boram Koo

    (Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, Suwon 16499, Korea)

  • Dongcheul Lee

    (Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, Suwon 16499, Korea)

  • Jaeshin Yi

    (Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, Suwon 16499, Korea)

  • Chee Burm Shin

    (Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, Suwon 16499, Korea)

  • Dong Joo Kim

    (Lotte Chemical, Daejeon 34110, Korea)

  • Eun Mi Choi

    (Lotte Chemical, Daejeon 34110, Korea)

  • Tae Hyuk Kang

    (Lotte Chemical, Daejeon 34110, Korea)

Abstract

The zinc/bromine (Zn/Br 2 ) flow battery is an attractive rechargeable system for grid-scale energy storage because of its inherent chemical simplicity, high degree of electrochemical reversibility at the electrodes, good energy density, and abundant low-cost materials. It is important to develop a mathematical model to calculate the current distributions in a Zn/Br 2 flow cell in order to predict such quantities as current, voltage, and energy efficiencies under various charge and discharge conditions. This information can be used to design both of bench and production scale cells and to select the operating conditions for optimum performance. This paper reports a modeling methodology to predict the performance of a Zn/Br 2 flow battery. The charge and discharge behaviors of a single cell is calculated based on a simple modeling approach by considering Ohm’s law and charge conservation on the electrodes based on the simplified polarization characteristics of the electrodes. An 8-cell stack performance is predicted based on an equivalent circuit model composed of the single cells and the resistances of the inlet and outlet streams of the positive and negative electrolytes. The model is validated by comparing the modeling results with the experimental measurements.

Suggested Citation

  • Boram Koo & Dongcheul Lee & Jaeshin Yi & Chee Burm Shin & Dong Joo Kim & Eun Mi Choi & Tae Hyuk Kang, 2019. "Modeling the Performance of a Zinc/Bromine Flow Battery," Energies, MDPI, vol. 12(6), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1159-:d:217073
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    References listed on IDEAS

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