A facile preparation method of surface patterned polymer electrolyte membranes for fuel cell applications

Jong Kwan Koh, Yukwon Jeon, Yong Il Cho, Jong Hak Kim, Yong Gun Shul

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

We report a facile patterning method that facilitates production of large-area platforms with well-arrayed micro/nanopatterns of a polymer electrolyte membrane (PEM) at low cost using an elastomeric mold at room temperature without hot-pressing. Membrane-electrode interfacial properties on the cathode side are controlled by the patterned structure of the membrane, which in turn directly affects the electrochemically active surface area (ECSA) and Pt utilization of the catalyst. This confirmed that electrochemical properties improve the performance of the membrane electrode assembly (MEA). A MEA fabricated with a 3 × 5 μm (width × gap) micropatterned Nafion membrane exhibits a current density of 1.79 A cm-2 at 0.6 V and a power density of 1.26 W cm-2 at 75 °C; these values are 53% and 59% greater than those of the corresponding MEA without a patterned membrane, respectively, and are among the highest performances reported for polymer electrolyte membrane fuel cells (PEMFCs). However, use of a nanopatterned membrane decreases the performance due to insufficient infiltration of the ionomer into the grooved surface, leading to a poor mechanical/electrical contact between the membrane and the electrode. Membrane morphology and the structure of the membrane-electrode interface are characterized by field emission scanning electron microscopy (FE-SEM), cyclic voltammetry (CV), and impedance spectroscopy. This journal is

Original languageEnglish
Pages (from-to)8652-8659
Number of pages8
JournalJournal of Materials Chemistry A
Volume2
Issue number23
DOIs
Publication statusPublished - 2014 Jun 21

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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