A hydrophobic blend binder for anti-water flooding of cathode catalyst layers in polymer electrolyte membrane fuel cells

Keun Hwan Oh, Wan Keun Kim, Kyung A. Sung, Min Ju Choo, Kwan Woo Nam, Jang Wook Choi, Jung Ki Park

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We report polymer electrolyte membrane fuel cells (PEMFCs) in which poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-co-HFP)) copolymer was added to the existing sPEEK binder in cathode catalyst layers (CCLs). Compared to a control case with no such copolymer, the cell with the copolymer exhibits improved performance, particularly in the oxygen mass transport. The improved mass transport behavior is attributed to the copolymer that makes CCLs more hydrophobic and thus suppresses water flooding significantly. Contact angle measurements and various electrochemical characterizations consistently support the copolymer effect for the improved oxygen mass transport. In addition, the introduction of P(VdF-co-HFP) lowers the glass transition temperature of the binder, which contributes to enhancing the adhesion properties between the CCLs and membranes.

Original languageEnglish
Pages (from-to)13695-13702
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number21
DOIs
StatePublished - Oct 2011

Keywords

  • Catalyst layer
  • Glass transition temperature
  • Hydrophobicity
  • P(VdF-co-HFP)
  • Water flooding

Fingerprint

Dive into the research topics of 'A hydrophobic blend binder for anti-water flooding of cathode catalyst layers in polymer electrolyte membrane fuel cells'. Together they form a unique fingerprint.

Cite this