Measurement of Diffusion Coefficient and Electro-osmotic Coefficient of Water at PEFC
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概要
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In order to grasp properly PEFC power generation performances, it is necessary to know data for water management, such as diffusion coefficient of water D and electro-osmotic coefficient nd of water through the membrane. In this study, we have measured D for both membrane electrode assembly (MEA) and gas diffusion layer (GDL), and nd for MEA used in our experiment by our own simple method under a wide range of relative humidity. Measured D for MEA was 1–10×10－3 cm2 s－1 and nd for MEA was 1.0–1.5. Comparison of our data with other published data shows that our measured data exists between the upper and lower published data. Measured D for GDL gave the approximate value of porosity divided by tortuosity of 0.21.
著者
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Araki Takuto
Department Of Mechanical Engineering Kyoto University
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Onda Kazuo
Department Of Electrical And Electronic Engineering Toyohashi University Of Technology
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Onda Kazuo
Department of Electrical and Electronic Engineering, Toyohashi University of Technology
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SUNAKAWA Daisuke
Department of Electrical and Electronic Engineering, Toyohashi University of Technology
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OYAMA Shogo
Department of Electrical and Electronic Engineering, Toyohashi University of Technology
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ARAKI Takuto
Department of Electrical and Electronic Engineering, Toyohashi University of Technology
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