Hydrocarbon-based electrode ionomer for proton exchange membrane fuel cells

Ji Eon Chae, Sung Jong Yoo, Jin Young Kim, Jong Hyun Jang, So Young Lee, Kwang Ho Song, Hyoung Juhn Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The electrode ionomer is a key factor that significantly affects the catalyst layer morphology and fuel cell performance. Herein, sulfonated poly(arylene ether sulfone)-based electrode ionomers with polymers of various molecular weights and alcohol/water mixtures were prepared, and those comprising the alcohol/water mixture showed a higher performance than the ones prepared using higher boiling solvents, such as dimethylacetamide; this is owing to the formation of the uniformly dispersed ionomer catalyst layer. The relation between ionomer molecular weight for the same polymer structure and the sulfonation degree was investigated. Because the chain length of polymer varies with molecular weight and chain entanglement degree, its molecular weight affects the electrode morphology. As the ionomer covered the catalyst, the agglomerates formed were of different morphologies according to their molecular weight, which could be deduced indirectly through dynamic light scattering and scanning electron microscopy. Additionally, the fuel cell performance was confirmed in the current-voltage curve.

Original languageEnglish
Pages (from-to)32856-32864
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number57
DOIs
Publication statusPublished - 2020 Nov 20

Keywords

  • Hydrocarbon-based electrode ionomer
  • Membrane-electrode assembly
  • Polymer electrolyte
  • Proton exchange membrane fuel cell
  • Sulfonated poly(arylene ether sulfone)

ASJC Scopus subject areas

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

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