High-performance membrane-electrode assembly with an optimal polytetrafluoroethylene content for high-temperature polymer electrolyte membrane fuel cells

Gisu Jeong, MinJoong Kim, Junyoung Han, Hyoung-Juhn Kim, Yong-Gun Shul, EunAe Cho

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Although high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) have a high carbon monoxide tolerance and allow for efficient water management, their practical applications are limited due to their lower performance than conventional low-temperature PEMFCs. Herein, we present a high-performance membrane-electrode assembly (MEA) with an optimal polytetrafluoroethylene (PTFE) content for HT-PEMFCs. Low or excess PTFE content in the electrode leads to an inefficient electrolyte distribution or severe catalyst agglomeration, respectively, which hinder the formation of triple phase boundaries in the electrodes and result in low performance. MEAs with PTFE content of 20 wt% have an optimal pore structure for the efficient formation of electrolyte/catalyst interfaces and gas channels, which leads to high cell performance of approximately 0.5 A cm-2 at 0.6 V.
Original languageEnglish
JournalJournal of Power Sources
Volume323
Pages (from-to)142-146
Number of pages5
ISSN0378-7753
DOIs
Publication statusPublished - 2016

Keywords

  • High-temperature polymer electrolyte membrane fuel cell
  • Membrane electrode assembly
  • Phosphoric acid
  • Polytetrafluoroethylene
  • Pore structure

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