Reduced mass transport resistance in polymer electrolyte membrane fuel cell by polyethylene glycol addition to catalyst ink

Hye Yeong Lee, Sang Kyung Kim, Myeong Rye Lee, Dong Hyun Peck, Yun Chan Kang, Chang Soo Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Effects of Polyethylene glycol (PEG) addition to cathode catalyst ink were investigated by changing the addition amount of PEG. Performance of the polymer electrolyte membrane fuel cells (PEMFCs) increased and then decreased at the higher current density than 1.5 A/cm2 as the amount of PEG addition increased. However, durability was not changed by the addition of PEG to the catalyst ink. Three different molecular weights of PEG were compared for PEG additives to cathode catalyst ink. Performance at high current density region increased and then decreased as PEG molecular weight increases from 200 to 10000. Increased performance by addition of PEG was attributed from reduced mass transport resistance. However, addition of large molecular weight PEG to catalyst ink reduced the performance because it lowered ionomer conductivity in the catalyst layer and then reduced proton transport resistance. Increased pore size in the catalyst layer and increased hydrophilicity on the electrode were also analyzed by addition of PEG to catalyst ink.

Original languageEnglish
Pages (from-to)354-361
Number of pages8
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Catalyst layer
  • Mass transport resistance
  • Polyethylene glycol (PEG)
  • Polymer electrolyte membrane fuel cell
  • Pore size distribution

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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