1 Introduction
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Fig. 1.2 Schematic diagram of PEMFC voltage loss
cell performance is not considered, sometimes even ignored. The film resistance can
be improved by reducing the film thickness. The resistance of protons in cathode
catalyst layer can also be optimized by reducing the thickness of catalyst layer or
platinum loading. At present, reducing the overpotential of oxygen reduction is the
most studied. The main methods are to develop new catalysts, increase the exchange
current density of oxygen reduction reaction, optimize the performance of catalysts and electrodes, and reduce the overpotential of oxygen reduction. In terms of
improving mass transfer loss, the main research direction is to improve the material
properties of diffusion layer and catalyst layer, and optimize the interface structure
between diffusion layer and catalyst layer. However, the exact location of condensation and the mechanism of water infiltration into diffusion layer and catalytic layer
are still unclear, which makes it more difficult to study this part.