Overall and local effects of operating conditions in PEM fuel cells with dead-ended anode

Yupeng Yang, Xu Zhang, Liejin Guo, Hongtan Liu

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Nitrogen and water accumulations in fuel cells with dead-ended anode can cause severe cell performance decline and fluctuations. In this work, both overall and local effects of fuel cell operating parameters, i.e., cathode humidity, air stoichiometry, hydrogen pressure and operating current density, have been experimentally studied under galvanostatic mode. A purge at the anode is automatically triggered when the cell voltage has decreased by 0.1 V and the mean purge interval, defined as the average time between two purges, is recorded as a characteristic parameter. Local current densities are measured to study the local effects and detailed local characteristics of the fuel cell. The experimental results show that mean purge intervals decrease with cathode inlet humidity and operating current density, and increase with inlet hydrogen pressure and air stoichiometry. The experimental results also show that the local current densities change very differently at different locations and impurities first accumulate near the end of the anode channel and then gradually progress upstream.

Original languageEnglish (US)
JournalInternational Journal of Hydrogen Energy
DOIs
StateAccepted/In press - Apr 6 2016

Fingerprint

fuel cells
Fuel cells
Anodes
anodes
Current density
current density
Stoichiometry
humidity
stoichiometry
Atmospheric humidity
Cathodes
cathodes
intervals
Hydrogen
air
hydrogen
Air
cells
upstream
Impurities

Keywords

  • Anode impurity accumulation
  • Anode purge
  • Dead-ended anode
  • PEM fuel cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Overall and local effects of operating conditions in PEM fuel cells with dead-ended anode. / Yang, Yupeng; Zhang, Xu; Guo, Liejin; Liu, Hongtan.

In: International Journal of Hydrogen Energy, 06.04.2016.

Research output: Contribution to journalArticle

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AB - Nitrogen and water accumulations in fuel cells with dead-ended anode can cause severe cell performance decline and fluctuations. In this work, both overall and local effects of fuel cell operating parameters, i.e., cathode humidity, air stoichiometry, hydrogen pressure and operating current density, have been experimentally studied under galvanostatic mode. A purge at the anode is automatically triggered when the cell voltage has decreased by 0.1 V and the mean purge interval, defined as the average time between two purges, is recorded as a characteristic parameter. Local current densities are measured to study the local effects and detailed local characteristics of the fuel cell. The experimental results show that mean purge intervals decrease with cathode inlet humidity and operating current density, and increase with inlet hydrogen pressure and air stoichiometry. The experimental results also show that the local current densities change very differently at different locations and impurities first accumulate near the end of the anode channel and then gradually progress upstream.

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