Preparation And Study Of NG/PF Composite Materials Bipolar Plate

Proton exchange membrane fuel cell (PEMFC) can be directly convert chemicalenergy into electrical energy clean and efficient power generation device. With highenergy conversion rate, no pollution, low noise, low temperature can runcharacteristics, widely used in home, car, outdoor small machines, etc. The plate isone of the important parts of it, affecting the development of proton exchangemembrane fuel cell. This subject mainly from the following two aspects is to makeproton exchange membrane fuel cell plate. First use dry method and wet methodrlegal two kinds of process to prepare of flake graphite/phenolic resin (NG/PF)composite plate materials. Wet legally make full use of the microstructure of flakegraphite and the physical, with chemical properties of thermoplastic phenolic resin,composite more completely. Dry after legal powder phenolic resin as raw material,mixed with flake graphite directly for ball mill, simple preparation process. Resultsshowed that the preparation technology of different have different influence ondouble plate performance.Secondly, combined with dry compound process and wet process, preparation ofvarious carbon doped NG/PF double plate composite double plate materials,Thermoplastic phenolic resin content is fixed to the17wt%of composite materials,carbon filler used carbon nanotubes and carbon aerogels. The scanning electronmicroscope (SEM), infrared spectrum, X-ray diffraction spectroscopy andthermogravimetric analysis of the composites were characterized. And on theconductivity of the double plate, mechanical performance, bending strength,corrosion current density of the composite material, such as contact Angle wasmeasured.Results indicate that doping carbon materials morphology characteristics, size,content about double plate has a great influence on the comprehensive performanceof composite materials. Carbon nanotubes because of its large length to diameterratio and anisotropic characteristics in the composite material of double plate has a great influence on comprehensive performance, etc; Spherical carbon aerogels due toits small particle size, large specific surface area to reduce the conductivity ofcomposite materials has a big role. Composite materials in the content of carbonnanotubes and carbon aerogels were1.6wt.%and2wt.%with the bestperformance. To suppress the temperature (180℃), time (min)70, pressing pressureof150Mpa and the graphite particle size (105-150mesh); at this time theperformance of the composite double plate has achieved the best.