The Experimental Study on Micro PDMS PEMFC by Using MEMS Technology

• Main Authors: Hsu, Yi-Ja, 許義嘉
• Other Authors: Chen, Chiun-Hsun
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/43751549739759432360

碩士 === 國立交通大學 === 機械工程學系 === 98 === This study fabricated micro PDMS (Polydimethyl Siloxane) PEMFC (Proton Exchange Membrane Fuel Cell) by using the MEMS (Micro Electro Mechanical Systems) technology. The active area of the membrane is 2cm×2cm. Firstly, a series of performance experiments on a single micro PDMS PEMFC was carried out. The experimental parameters included current collector shape, convection type and clamping force, respectively. Secondly, a planar PEMFC stack was designed and assembled to test the performance. The experimental parameters consisted of clamping force and fuel supply condition. In addition, both the single cell and the stack were tested for durability. Finally, a comparison between PDMS-based PEMFC and silicon-based one was made. The experimental results show that both the performances of the air-breathing and forced convection cells increase with an increase of the circle numbers from one to twenty-five on the current collector under the same current collector open ratio; The forced convection cell is a better choice for long-time high current-density output whereas the air-breathing cell is more suitable for lower current density output; An appropriate clamping torque should be considered carefully to enhance the performance but without narrowing down the fuel flow channels; The increase of flow rate is not a best way to improve the concentration loss in this air-breathing stack experiment because of the limiting air supply, and each cell in the same stack has different performance under series arrangement; Both the single micro PDMS fuel cell and the cell stack can maintain a stable power output for a long time use up to 14 hours; The PDMS-based PEMFC has a better performance than that of the silicon-based one under both forced oxygen supply and the air-breathing ways; PDMS is a better material than silicon for micro air-breathing fuel cell because it is with less water flooding effects.