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Electrochemical impedance spectroscopy as a diagnostic tool for the evaluation of flow field geometry in polymer electrolyte membrane fuel cells

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  • Maidhily, M.
  • Rajalakshmi, N.
  • Dhathathreyan, K.S.

Abstract

In the present study, two different designs of flow field have been evaluated by electrochemical impedance spectroscopy for polymer electrolyte membrane fuel cells. Ex-situ experiments were conducted in serpentine and interdigitated flow field geometry. We have investigated the serpentine type flow field designs with varying rib and channel width geometry and studied their influence on the PEMFC performance. The anodic and cathodic resistances were also evaluated using symmetrical mode of operation. The three different types of multichannel serpentine geometry with 2, 1 and 0.7 mm rib and channel widths were used for evaluation and found that the mass transfer resistance was decreasing with rib& channel width thickness. The mass transfer resistance decreased by one order from 0.197 Ω for 2 mm channel width to 0.016 Ω for 0.7 mm channel width. The maximum power density obtained for PEMFC operating on H2/Air at 50 °C, with 0.7, 1&2 mm rib and channel width was found to be 365, 291 and 202 mW/cm2 respectively. This study emphasized the effect of rib and channel width geometry of flow fields by symmetrical mode of fuel cell operation using electrochemical impedance spectroscopy to obtain the anodic and cathodic mass transfer resistance individually.

Suggested Citation

  • Maidhily, M. & Rajalakshmi, N. & Dhathathreyan, K.S., 2013. "Electrochemical impedance spectroscopy as a diagnostic tool for the evaluation of flow field geometry in polymer electrolyte membrane fuel cells," Renewable Energy, Elsevier, vol. 51(C), pages 79-84.
    • Handle: RePEc:eee:renene:v:51:y:2013:i:c:p:79-84
    DOI: 10.1016/j.renene.2012.09.016
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    References listed on IDEAS

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    1. Roshandel, R. & Arbabi, F. & Moghaddam, G. Karimi, 2012. "Simulation of an innovative flow-field design based on a bio inspired pattern for PEM fuel cells," Renewable Energy, Elsevier, vol. 41(C), pages 86-95.
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