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Analysis of operational characteristics of polymer electrolyte fuel cell with expanded graphite flow-field plates via electrochemical impedance investigation

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  • Park, Taehyun
  • Chang, Ikwhang
  • Lee, Yoon Ho
  • Ji, Sanghoon
  • Cha, Suk Won

Abstract

Expanded graphite was investigated as a material for flow-field plates in PEFCs (polymer electrolyte fuel cells). Because expanded graphite is flexible but has similar material properties with normal graphite, channels on flow-field plates were designed to have single channel in order to compare operational characteristics including diffusion of reactants through ribs by comparing polarization curves and electrochemical impedance spectra between PEFCs with expanded graphite and graphite flow-field plates. As a result, PEFC with the expanded graphite flow-field plates has comparable open-circuit voltage to that with the graphite flow-field plates. However, PEFC with the expanded graphite plates had higher ohmic resistance than that with the graphite plates due to higher electrical resistance of the expanded graphite than that of the graphite. It was also found from faradaic resistances that the diffusion of the reactants through GDLs (gas diffusion layers) is disturbed in the case of the expanded graphite flow-field plates because the GDL is compressed excessively due to its flexibility.

Suggested Citation

  • Park, Taehyun & Chang, Ikwhang & Lee, Yoon Ho & Ji, Sanghoon & Cha, Suk Won, 2014. "Analysis of operational characteristics of polymer electrolyte fuel cell with expanded graphite flow-field plates via electrochemical impedance investigation," Energy, Elsevier, vol. 66(C), pages 77-81.
    • Handle: RePEc:eee:energy:v:66:y:2014:i:c:p:77-81
    DOI: 10.1016/j.energy.2013.11.051
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    References listed on IDEAS

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    2. Changhee Song & Sanghoon Lee & Bonhyun Gu & Ikwhang Chang & Gu Young Cho & Jong Dae Baek & Suk Won Cha, 2020. "A Study of Anode-Supported Solid Oxide Fuel Cell Modeling and Optimization Using Neural Network and Multi-Armed Bandit Algorithm," Energies, MDPI, vol. 13(7), pages 1-11, April.
    3. Iranzo, Alfredo & Boillat, Pierre, 2018. "CFD simulation of the transient gas transport in a PEM fuel cell cathode during AC impedance testing considering liquid water effects," Energy, Elsevier, vol. 158(C), pages 449-457.
    4. Lee, Sanghoon & Lee, Yeageun & Park, Joonho & Yu, Wonjong & Cho, Gu Young & Kim, Yusung & Cha, Suk Won, 2019. "Effect of plasma-enhanced atomic layer deposited YSZ inter-layer on cathode interface of GDC electrolyte in thin film solid oxide fuel cells," Renewable Energy, Elsevier, vol. 144(C), pages 123-128.
    5. Kang, Yun Sik & Won, Phillip & Ko, Seung Hwan & Park, Taehyun & Yoo, Sung Jong, 2019. "Bending-durable membrane-electrode assembly using metal nanowires for bendable polymer electrolyte membrane fuel cell," Energy, Elsevier, vol. 172(C), pages 874-880.
    6. Park, Taehyun & Chang, Ikwhang & Jung, Ju Hae & Lee, Ha Beom & Ko, Seung Hwan & O'Hayre, Ryan & Yoo, Sung Jong & Cha, Suk Won, 2017. "Effect of assembly pressure on the performance of a bendable polymer electrolyte fuel cell based on a silver nanowire current collector," Energy, Elsevier, vol. 134(C), pages 412-419.

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