Study on the Electrical and Thermal Properties of Carbon/Carbon Composite for Fuel Cell Bipolar Plate

This research made use of phenolic resins, graphite powder and carbon fiber and fixed thereof contents, in the meantime. dope the pre-somatic of metallic molybdenum-molybdenum hexacarbonyl in different proportions, applied the BMC （Bulk Molding Compound） method to fabricate the bipolar plates that are composite material with content of molybdenum hexacarbonyl exclusive use for fuel cell. Afterward, by going through a high-temperature carbonization process, the molybdenum hexacarbonyl was oxidized and reduced to metallic molybdenum to yield a C/C （carbon/carbon composite） material. This research explored the electrical conductivity. thermal conductivity, gas leakiness, flame resistance and thermal properties, etc. According to the results, the bipolar plates made by doping the molybdenum hexacarbonyl in different proportions that are used for fuel cell have thereof electrical conductivity heightened by 416.37%, coefficient of thermal expansion reduced by 76.65%, thermal conductivity increased by 16.45%, without gas leakiness.