| Summary: | 碩士 === 大同大學 === 機械工程學系(所) === 99 === Proton exchange membrane fuel cell is not only clean, pollution－free but also small size, portable, great market potential. Among the components of a fuel cell, carbon plate is one of the key components and the volume about 90％ of the fuel cell. The carbon plate is important factor of affects the fuel cell performance, power density and cost of production. In this proposal we will study how the variations in the manufacturing process affecting the physical properties of a carbon plate and according to Japanese Industrial Standard measurement methods to obtain the data of these properties. For the manufacturing processes, we will consider the content of resin in the carbon plate, the pressure in the pressurization process, and the temperature in heating solidification. For the physical properties, we will consider the mechanical properties, electric properties, gas permeability properties, density, and water contact angle. The process conditions for expanded graphite, resin concentration of 27%, the pressure in the pressurization process of 90kg／cm2, the temperature in heating solidification of 150℃ show excellent performance. The results of this study can be used for carbon plate process flow optimization, save unnecessary product test development timing, to save development costs, and thus enhance the physical properties of carbon plate, and further can significantly improve the performance of fuel cell power density.
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