TY - JOUR
T1 - Impedance-Based Performance Analysis of Micropatterned Polymer Electrolyte Membrane Fuel Cells
AU - Tomizawa, Morio
AU - Nagato, Keisuke
AU - Nagai, Kohei
AU - Tanaka, Akihisa
AU - Heinzmann, Marcel
AU - Weber, Andre
AU - Inoue, Gen
AU - Nakao, Masayuki
N1 - Funding Information:
This work was supported by the Grant-in-Aid for JSPS Fellows. Additionally, the authors are grateful for the financial support from the Leadership Development Program for Ph.D. (LDPP) at the University of Tokyo. The authors would also like to thank Editage for their English language editing service.
Publisher Copyright:
Copyright © 2022 by ASME; reuse license CC-BY 4.0
PY - 2022/5
Y1 - 2022/5
N2 - 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.
AB - 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.
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U2 - 10.1115/1.4053388
DO - 10.1115/1.4053388
M3 - Article
AN - SCOPUS:85127431882
VL - 19
JO - Journal of Electrochemical Energy Conversion and Storage
JF - Journal of Electrochemical Energy Conversion and Storage
SN - 2381-6872
IS - 2
M1 - 021017
ER -
