Transient phenomenon of step switching for current or voltage in PEMFC

Chun Ying Hsu, Fang Bor Weng, Ay Su, Chao-yang Wang, Irfan Saif Hussaini, Teng Lang Feng

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The transient phenomenon of fuel cell with 5 cm2 active area is investigated in this study by current density step increase and switching voltage under different conditions. It is found that there is an undershoot when the current density step increase is at the loading of 60% RH anode cathode, 3 stoic., 70 °C, 15 psi for automobile applications. The voltage is almost zero under 0.2 step increase to 1.0 A/cm2 due to the H+ transport in membrane or H2/O2 in catalyst layer is almost used up. The undershoot phenomenon is more serious under gases stoichiometries of 3.0/3.0 when H2 is fully humidified due to low gas concentration or flooding on the electrode. This phenomenon would induce the degradation of fuel cell components.

Original languageEnglish (US)
Pages (from-to)1979-1985
Number of pages7
JournalRenewable Energy
Volume34
Issue number8
DOIs
StatePublished - Aug 1 2009

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
Fuel cells
Current density
Electric potential
Gases
Stoichiometry
Automobiles
Anodes
Cathodes
Membranes
Degradation
Electrodes
Catalysts

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

Cite this

Hsu, C. Y., Weng, F. B., Su, A., Wang, C., Hussaini, I. S., & Feng, T. L. (2009). Transient phenomenon of step switching for current or voltage in PEMFC. Renewable Energy, 34(8), 1979-1985. https://doi.org/10.1016/j.renene.2008.12.024
Hsu, Chun Ying ; Weng, Fang Bor ; Su, Ay ; Wang, Chao-yang ; Hussaini, Irfan Saif ; Feng, Teng Lang. / Transient phenomenon of step switching for current or voltage in PEMFC. In: Renewable Energy. 2009 ; Vol. 34, No. 8. pp. 1979-1985.
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Hsu, CY, Weng, FB, Su, A, Wang, C, Hussaini, IS & Feng, TL 2009, 'Transient phenomenon of step switching for current or voltage in PEMFC', Renewable Energy, vol. 34, no. 8, pp. 1979-1985. https://doi.org/10.1016/j.renene.2008.12.024

Transient phenomenon of step switching for current or voltage in PEMFC. / Hsu, Chun Ying; Weng, Fang Bor; Su, Ay; Wang, Chao-yang; Hussaini, Irfan Saif; Feng, Teng Lang.

In: Renewable Energy, Vol. 34, No. 8, 01.08.2009, p. 1979-1985.

Research output: Contribution to journalArticle

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AU - Hsu, Chun Ying

AU - Weng, Fang Bor

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AU - Hussaini, Irfan Saif

AU - Feng, Teng Lang

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AB - The transient phenomenon of fuel cell with 5 cm2 active area is investigated in this study by current density step increase and switching voltage under different conditions. It is found that there is an undershoot when the current density step increase is at the loading of 60% RH anode cathode, 3 stoic., 70 °C, 15 psi for automobile applications. The voltage is almost zero under 0.2 step increase to 1.0 A/cm2 due to the H+ transport in membrane or H2/O2 in catalyst layer is almost used up. The undershoot phenomenon is more serious under gases stoichiometries of 3.0/3.0 when H2 is fully humidified due to low gas concentration or flooding on the electrode. This phenomenon would induce the degradation of fuel cell components.

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