Feasibility of ultra-low Pt loading electrodes for high temperature proton exchange membrane fuel cells based in phosphoric acid-doped membrane

S. Martin*, J. O. Jensen, Q. Li, P. L. Garcia-Ybarra, J. L. Castillo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Factors as the Pt/C ratio of the catalyst, the binder content of the electrode and the catalyst deposition method were studied within the scope of ultra-low Pt loading electrodes for high temperature proton exchange membrane fuel cells (HT-PEMFCs). The Pt/C ratio of the catalyst allowed to tune the thickness of the catalytic layer and so to minimize the detrimental effect of the phosphoric acid flooding. A membrane electrode assembly (MEA) with 0.05 mgPtcm−2 at anode and 0.1 mgPtcm−2 at cathode (0.150 mgPtcm−2 in total) attained a peak power density of 346 mW cm−2. It was proven that including a binder in the catalytic layer of ultra-low Pt loading electrodes lowers its performance. Electrospraying-based MEAs with ultra-low Pt loaded electrodes (0.1 mgPtcm−2) rendered the best (peak power density of 400 mW cm−2) compared to conventional methods (spraying or ultrasonic spraying) but with the penalty of a low catalyst deposition rate.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number52
Pages (from-to)28273-28282
Number of pages10
ISSN0360-3199
DOIs
Publication statusPublished - 2019

Keywords

  • Ultra-low Pt loading
  • HT-PEMFC
  • PBI
  • Ultrasonic-spraying
  • Electrospraying

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