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The polymer electrolyte fuel cell is expected as the power source for vehicle. However, high current density operation of the fuel cell is demanded for a cost cut, miniaturization and weight saving of the fuel cell system. The electrode which can evacuate cathode generated water efficiently is necessary for stable generation in high current density area. In this article, we paid our attention to MPL which constitutes GDL of a fuel cell electrode. And especially we made a study on MPL which can perform evacuation of generation water easily. As a result, we made the porous particles which consist of carbon black and PTFE using the spray dry method and we showed the MPL which consisted of the particles. This MPL had both pores of less than 1μm in diameter that is effective in movement of the gas and pores of 1–10μm in diameter that is effective in evacuation of generation water. Furthermore, the possibility that this MPL could contribute to high current density operation of the fuel cell was verified experimentally. © The Electrochemical Society of Japan, All rights reserved.

Study on the MPL Structure of the Gas Diffusion Layer about the Polymer Electrolyte Fuel Cell