Abstract
With a continuous decrease in Pt loading, mass transport resistances within MEA are severely aggravated, especially that the oxygen transport resistance is becoming an obstacle for commercialization of fuel cells. In this chapter, the proton transport in the ultrathin perfluorosulfonic acid ionomer film covered on catalyst surface is investigated first. Next, the oxygen transport behavior including gas diffusion in porous electrode and gas permeation in ultrathin perfluorosulfonic acid ionomer film is probed; thus, the underlying transport mechanism is discussed detailedly. In addition, the application of numerous novel electrocatalysts leads to high ORR performances but also cation contamination, which is also assessed in the last part of this section. Herein, we shed light on transport and reaction mechanism inside the MEA, as well as provide key insights for optimization design for appropriate electrode structures.
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Zhang, J., Shen, S. (2021). Membrane Electrode Assembly (MEA). In: Low Platinum Fuel Cell Technologies. Energy and Environment Research in China. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-56070-9_4
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DOI: https://doi.org/10.1007/978-3-662-56070-9_4
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