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Effect of Compression Ratio of Graphite Felts on the Performance of an All-Vanadium Redox Flow Battery

Author

Listed:
  • Chin-Lung Hsieh

    (Institute of Nuclear Energy Research, Atomic Energy Council, No. 1000 Wenhua Rd., Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan)

  • Po-Hong Tsai

    (Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-tech Innovations, National Chung Cheng University, No. 168, University Rd., Minhsiung Township, Chiayi County 62102, Taiwan)

  • Ning-Yih Hsu

    (Institute of Nuclear Energy Research, Atomic Energy Council, No. 1000 Wenhua Rd., Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan)

  • Yong-Song Chen

    (Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-tech Innovations, National Chung Cheng University, No. 168, University Rd., Minhsiung Township, Chiayi County 62102, Taiwan)

Abstract

All-vanadium redox flow batteries (VRFBs) are considered promising candidates for large-scale energy storage systems due to their flexible power scale design, high efficiency, deep discharge, long cycle life and environmental friendliness. The performance and efficiency of a VRFB is affected by many factors, including component materials, battery design, electrolyte composition and operating conditions. Among the key components, porous electrodes play a key role, as the electrochemical reaction occurs on the fiber surface of the electrode. As such, many studies have focused on improving reaction kinetics by modifying the surface of the electrode. In this work, the effect of varying the compression ratio (CR) of graphite felts on the performance and efficiency of a VRFB are investigated. The impedance of a single VRFB under varying CRs of graphite felts at various operating conditions were also measured. The results suggest that performance of a VRFB increases with increasing CR due to the decrease of area resistance and concentration overpotential. The porous electrode compressed from 6.5 to 4 mm demonstrates the optimal energy efficiency of 73% at the operating current density 80 mA cm −2 and electrolyte flow rate 100 mL min −1 .

Suggested Citation

  • Chin-Lung Hsieh & Po-Hong Tsai & Ning-Yih Hsu & Yong-Song Chen, 2019. "Effect of Compression Ratio of Graphite Felts on the Performance of an All-Vanadium Redox Flow Battery," Energies, MDPI, vol. 12(2), pages 1-11, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:2:p:313-:d:199250
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    References listed on IDEAS

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    1. Wang, Q. & Qu, Z.G. & Jiang, Z.Y. & Yang, W.W., 2018. "Experimental study on the performance of a vanadium redox flow battery with non-uniformly compressed carbon felt electrode," Applied Energy, Elsevier, vol. 213(C), pages 293-305.
    2. Ghimire, Purna C. & Bhattarai, Arjun & Schweiss, Rüdiger & Scherer, Günther G. & Wai, Nyunt & Yan, Qingyu, 2018. "A comprehensive study of electrode compression effects in all vanadium redox flow batteries including locally resolved measurements," Applied Energy, Elsevier, vol. 230(C), pages 974-982.
    3. Xinan Zhang & Yifeng Li & Maria Skyllas-Kazacos & Jie Bao, 2016. "Optimal Sizing of Vanadium Redox Flow Battery Systems for Residential Applications Based on Battery Electrochemical Characteristics," Energies, MDPI, vol. 9(10), pages 1-20, October.
    4. Wang, Q. & Qu, Z.G. & Jiang, Z.Y. & Yang, W.W., 2018. "Numerical study on vanadium redox flow battery performance with non-uniformly compressed electrode and serpentine flow field," Applied Energy, Elsevier, vol. 220(C), pages 106-116.
    5. Chih-Hsun Chang & Han-Wen Chou & Ning-Yih Hsu & Yong-Song Chen, 2016. "Development of Integrally Molded Bipolar Plates for All-Vanadium Redox Flow Batteries," Energies, MDPI, vol. 9(5), pages 1-10, May.
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    1. Snigdha Saha & Kranthi Kumar Maniam & Shiladitya Paul & Venkata Suresh Patnaikuni, 2023. "Hydrodynamic and Electrochemical Analysis of Compression and Flow Field Designs in Vanadium Redox Flow Batteries," Energies, MDPI, vol. 16(17), pages 1-33, August.
    2. Xukun Zhang & Fancheng Meng & Linquan Sun & Zhaowu Zhu & Desheng Chen & Lina Wang, 2022. "Influence of Several Phosphate-Containing Additives on the Stability and Electrochemical Behavior of Positive Electrolytes for Vanadium Redox Flow Battery," Energies, MDPI, vol. 15(21), pages 1-14, October.

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