The Proton Exchange Membrane Fuel Cell Bipolar Plate

Due to the prospects for attaining high power density and energy conversion efficient, the proton exchange membrane full cell (PEMIFC) is one of the most promising power sources for future electric vehicles. Technology of PEMFC is very developed. Time of fell cell will come. It is main obstruction of limiting commercialization that manufactured cost of PEMFC is very high, especially manufactured cost of bipolar. Anti-corrosion coating of metal surface is made utilizing the sputter-deposition technique; metal bipolar is manufactured utilizing the punching technique. It is very hope that manufactured cost of bipolar is reduced, and accelerating commercialization of PEMIFC. In this work, Anti-corrosion coating of metal surface is made utilizing the sputter-deposition technique Anti-corrosion degree of coating is evaluated by simulating corrosion experiment. The experiment results show :It is a good and effective method that Anti-corrosion coating of metal bipolar plate surface is made utilizing the sputter-deposition technique. Simulating corrosion experiment that an electrolyte contain 1035M H2S04 and about 2ppm HF at 900C and 1.Ov is an effective accelerated test for corrosion likely to occur in actual fuel cell operation. The anti-corrosion ability of metal is advanced by sputtering C or TiN or CrC on stainless steel surface and sputtering CrC on Ti surface. But, they don抰 endure long time corrosion in an H2-02/air PEM fuel cell environment. If a layer thin Au is sputtered again after sputtering TiN or Cr on stainless steel surface, Anti-corrosion ability of metal is greatly advanced. They endure long time corrosion in an 112-O2Iair PEM fuel cell environment. If a layer thin Au is sputtered on Ti surface, long time corrosion is endured in an H2-02/air PEM fuel cell environment too. In this work, the performance of metal bipolar is tested by metal bipolar installed in cell. The result indicate the performance of metal bipolar plate of sputtering Au is best. And the performance of different flow field structure is tested. Some parameters (such as temperature, gas forces, flow rate of exhaust gas) are obtained by performance of metal bipolar testing and to prepare for install of PEM fuel cell stack in the future.