Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst

I. C. Halalay, B. A. Merzougui, A. M. Mance

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Performance of the perfluorinated sulfonic acid polymer electrolyte membrane in PEM fuel cells degrades through a multistep process. Hydroxyl radicals, formed via crossover gases or reactions of hydrogen peroxide with Fenton-active contaminants, generate hydrogen radicals that attack the backbone of Nafion® causing the release of fluoride anions. Fluoride anions promote corrosion of the plates and catalyst, with the release of transition metals in to the fuel cell environment. Transition metal ions catalyze the hydroxyl attack on the Nafion® backbone, resulting in further release of fluoride anions. We present here a new approach for mitigating the membrane degradation and for increasing the overall durability of the fuel cell by interfering with three steps of the membrane degradation cycle: the use of (i) hydroquinones to neutralize hydroxyl radicals, (ii) aza-crowns for sequestering fluoride anions, and (iii) crown ethers to sequester base metal cations.

Original languageEnglish
Title of host publicationECS Transactions - Proton Exchange Membrane Fuel Cells 8
Pages969-981
Number of pages13
Edition2 PART 1
DOIs
Publication statusPublished - 1 Dec 2008
EventProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI, United States
Duration: 12 Oct 200817 Oct 2008

Publication series

NameECS Transactions
Number2 PART 1
Volume16
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period12/10/0817/10/08

    Fingerprint

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Halalay, I. C., Merzougui, B. A., & Mance, A. M. (2008). Three mechanisms for protecting the PEM fuel cell membrane, plates and catalyst. In ECS Transactions - Proton Exchange Membrane Fuel Cells 8 (2 PART 1 ed., pp. 969-981). (ECS Transactions; Vol. 16, No. 2 PART 1). https://doi.org/10.1149/1.2981937