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 journalArticle

19 Citations (Scopus)

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
Pages (from-to)142-146
Number of pages5
JournalJournal of Power Sources
Volume323
DOIs
Publication statusPublished - 2016 Aug 15

Fingerprint

polytetrafluoroethylene
Polytetrafluoroethylene
Proton exchange membrane fuel cells (PEMFC)
Polytetrafluoroethylenes
fuel cells
assembly
electrolytes
membranes
Membranes
Electrolytes
Electrodes
electrodes
polymers
Catalysts
Water management
Phase boundaries
Carbon Monoxide
Pore structure
water management
catalysts

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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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.",
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High-performance membrane-electrode assembly with an optimal polytetrafluoroethylene content for high-temperature polymer electrolyte membrane fuel cells. / Jeong, Gisu; Kim, Minjoong; Han, Junyoung; Kim, Hyoung Juhn; Shul, Yong-Gun; Cho, Eunae.

In: Journal of Power Sources, Vol. 323, 15.08.2016, p. 142-146.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High-performance membrane-electrode assembly with an optimal polytetrafluoroethylene content for high-temperature polymer electrolyte membrane fuel cells

AU - Jeong, Gisu

AU - Kim, Minjoong

AU - Han, Junyoung

AU - Kim, Hyoung Juhn

AU - Shul, Yong-Gun

AU - Cho, Eunae

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Y1 - 2016/8/15

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AB - 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.

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