Investigation of MEA degradation in PEM fuel cell by on/off cyclic operation under different humid conditions

Dongho Seo, Junghyun Lee, Sangsun Park, Junki Rhee, Sung Won Choi, Yong Gun Shul

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The durability of PEM fuel cells as a function of different humid conditions and MEA degradation were investigated by on/off cyclic operation. The maximum numbers of cycles determined by cycle at 10% of cell voltage loss were 1980, 1650, 1100, 520, and 320 cycles at relative humidity (RH) of 1000, 80, 50, 30, and 10%, respectively. The increases of ohmic resistance were observed at the high humid conditions of RH 100 and 80%. On the other hand, the charge transfer resistance increased at low humid conditions of RH 50, 30, and 10%. The losses of electrochemical surface area were obtained about 21% and 7% under RH 50 and 30% after the on/off cyclic operations, respectively. The thickness of electrode was reduced in the both anode and cathode layer, indicating that carbon corrosion occurred during on/off cycling. At cathode layer, the growth and migration platinum particles into polymer electrolyte were detected by XRD and TEM analyses.

Original languageEnglish
Pages (from-to)1828-1836
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number2
DOIs
Publication statusPublished - 2011 Jan

All Science Journal Classification (ASJC) codes

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

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