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Research of thin carbon fiber paper manufacturing process for fuel cell applications
|關鍵字:||gas diffusion layer|
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|摘要:||本論文主要在利用新製程作出薄型化的氣體擴散層，使用碳能科技公司提供的百分之百PAN (Polyacrylonitrile) 系纖維作為原料的多孔性氧纖氈，氣體穿透度為5.7 cm3/cm2．s，孔隙率為78.4%。利用含浸酚醛乙醇溶劑且加入0.5 wt%之奈米碳管，使碳紙在與纖維同方向的機械強度可達到33.99 kPa，而與纖維方向垂直的部分可達到15.18 kPa；穿透電阻由64.9 mΩ/cm2下降至46.5 mΩ/cm2；碳紙薄型化的製程部分能將厚度達到小於0.2 mm。最後再將氣體擴散層塗上微孔層(Micro porous layer, MPL) ，並測量出當碳紙添加了0.5 wt%的奈米碳管時，其電池效率比未加入碳管提升了74.9%。|
The purpose of this study is to fabricate thin gas diffusion layers (GDLs) by new manufacturing process. This research using a porous carbon paper that adapts PAN-based carbon-fiber with high gas-permeability and conductivity of CeTech, which breathable ability is 5.7 cm3/cm2．s, and porosity is 78.4%. Using the phenolic resin impregnation method with 0.5 wt% carbon-nano-tube (CNT) to improve the tensile property to 33.99 kPa when the carbon fiber is parallel with its growth aspect, the tensile property is 15.18 kPa when it is vertical whit its growth aspect. Adding 0.5 wt% CNT also can reduce the electrics resistance of GDL from 64.9 mΩ/cm2 to 46.5 mΩ/cm2. It can attenuate the thickness less than 0.2 mm by the attenuating process of the GDL. At last step, micro porous layer (MPL) is sprayed, and surveys that the efficiency of the carbon paper be added 0.5 wt% CNT more 74.9% than the efficiency without CNT be added.
|Appears in Collections:||精密工程研究所|
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