Research for producing the gas diffusion layer of fuel cell by using pre-carbonization cloth mixed with reinforced phenolic resin

• Main Authors: Hey-Wen Liu, 劉慧雯
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/53168478638375648348

碩士 === 逢甲大學 === 材料與製造工程所 === 96 === This study discussed the applicability of the carbon-fiber-cloth for applying to the fuel cell by precarbonizing in different concentration of resin and precarbonized temperature. The applicability contains the thickness, air-permeability, density, surface resistivity, and efficiency of the fuel cell for expecting to be able to find out the optimal parameter for making the fuel cell, and then improving the properties of the fuel cell and solving the present problems of the fuel cell, such as low efficiency and difficult for assembling.It could be find in basic physical properties that the decreasing percentage of the thickness and the shrinkage for the carbon fiber paper were higher with the increase on the resin absorption thereof, the density and air-permeability of the carbon fiber paper were decreasing with the increase on the precarbonized temperature, the loss ratio of weight was increasing with the increase on the resin absorption and precarbonized temperature, with regard to the surface resistivity was decreasing remarkably with the increase of the resin absorption.In the efficiency of the cell, when the precarbonized temperature was higher than 1000℃, it could be find that the efficiency of the cells were all right in 2%, 5%, or 10% of the resin absorption for the carbon fiber paper, wherein, the 2% of the resin absorption in 1200℃precarbonized temperature one has the best efficiency that the limited current density could be reach 1403 mA/cm2, the maximum power density could be approach to 462 mW/cm2. It’s obviously that the fibers in the 2% of the resin absorption of the carbon fiber paper had been gotten an effective cross-linking, and enhanced the rate of the electrical conductivity effectively.The strength for the 2% of the resin absorption of the carbon fiber paper wasn’t still sufficiency; therefore, it’s disadvantageous in assembly.