Impedance-Based Performance Analysis of Micropatterned Polymer Electrolyte Membrane Fuel Cells

Morio Tomizawa, Keisuke Nagato, Kohei Nagai, Akihisa Tanaka, Marcel Heinzmann, Andre Weber, Gen Inoue, Masayuki Nakao

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Micropatterns applied to proton exchange membranes can improve the performance of polymer electrolyte fuel cells; however, the mechanism underlying this improvement is yet to be clarified. In this study, a patterned membrane electrode assembly (MEA) was compared with a flat one using electrochemical impedance spectroscopy and distribution of relaxation time analysis. The micropattern positively affects the oxygen reduction reaction by increasing the reaction area. However, simultaneously, the pattern negatively affects the gas diffusion because it lengthens the average oxygen transport path through the catalyst layer. In addition, the patterned MEA is more vulnerable to flooding, but performs better than the flat MEA in low-humidity conditions. Therefore, the composition, geometry, and operating conditions of the micropatterned MEA should be comprehensively optimized to achieve optimal performance.

Original languageEnglish
Article number021017
JournalJournal of Electrochemical Energy Conversion and Storage
Issue number2
Publication statusPublished - May 2022

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering


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