Effect of the fabrication condition of membrane electrode assemblies with carbon-supported ordered PtCo electrocatalyst on the durability of polymer electrolyte membrane fuel cells

Jeawoo Jung, Hyun S. Park, Jonghee Han, Hyoung Juhn Kim, Dirk Henkensmeier, Sung Jong Yoo, Jin Young Kim, So Young Lee, Kwang Ho Song, Hee Young Park, Jong Hyun Jang

Research output: Contribution to journalArticlepeer-review

Abstract

Electrode structure improvement is one of the most promising paths for improving the durability of polymer electrolyte membrane fuel cells (PEMFCs). As strategies to prevent structural deformation and enhance the durability of membrane electrode assemblies (MEAs) with structurally ordered PtCo/C-based cathodes, we evaluated the effect of hot pressing and reinforcing the electrode's structure by increasing the ionomer content. Even though the initial performances of the hot-pressed MEA (HP) and the MEA with extra cathode ionomer (EI) were lower than that of the conventional MEA (CE) by 13.6% and 19.1%, respectively, CE degraded much more significantly than HP and EI after an accelerated degradation test. Therefore, HP and EI could deliver significantly higher single cell performances than CE (22.7% and 43.7%, respectively). The improvements in the durability of HP and EI could be correlated with the structural stability which could be evaluated by structure and electrochemical analysis including electrochemical impedance spectroscopy.

Original languageEnglish
Pages (from-to)32834-32843
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number57
DOIs
Publication statusPublished - 2020 Nov 20

Keywords

  • Carbon supported ordered PtCo electrocatalyst
  • Durability
  • Electrode structure reinforcement
  • Hot press
  • Polymer electrolyte membrane fuel cell

ASJC Scopus subject areas

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

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