Transients of water distribution and transport in PEM fuel cells

Irfan S. Hussaini, Chao Yang Wang

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The response of polymer electrolyte membrane (PEM) fuel cells to a step change in load is investigated experimentally in this work. Voltage undershoot, a characteristic feature of transient response following a step increase in current, is due to transients of water distribution in the membrane and ionomers occurring at subsecond time scales. The use of humidified reactants as a means to control the magnitude of voltage undershoot is demonstrated. Further, the response under a step decrease in current density is explored to determine the existence of hysteresis. Under sufficiently humidified conditions, the responses under forward and reverse step changes are symmetric, but under low relative humidity conditions, voltage undershoot is twice as large as the overshoot.

Original languageEnglish (US)
Pages (from-to)B1394-B1400
JournalJournal of the Electrochemical Society
Volume156
Issue number12
DOIs
StatePublished - Nov 10 2009

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
fuel cells
electrolytes
membranes
Water
polymers
Electric potential
water
electric potential
Ionomers
Transient analysis
Hysteresis
Atmospheric humidity
transient response
Current density
Membranes
humidity
hysteresis
current density

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

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Transients of water distribution and transport in PEM fuel cells. / Hussaini, Irfan S.; Wang, Chao Yang.

In: Journal of the Electrochemical Society, Vol. 156, No. 12, 10.11.2009, p. B1394-B1400.

Research output: Contribution to journalArticle

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