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Graphite plate is widely used as bipolar plate for proton exchange membrane fuel cell due to its good electrical conductivity, thermal conductivity and corrosion resistance. But as a result of the graphite plate in the process of burning coal tar as the binder will be oxidized or volatile, cause there are holes with different sizes of graphite plate products, the porosity is about 18.2% ~ 24.3%, such a high rate of stomata use graphite plate. At present, more and more researchers in the world use organic matter such as phenol formaldehyde resin, paraffin wax, asphalt, carbon silane and other holes to fill the graphite plate, reduce the porosity, to achieve the purpose of sealing graphite plate. Organic matter has the…
The graphite felt electrode used for vanadium redox flow battery was used in the electrochemical treatment, the activity of the electrode was improved, the voltage efficiency was increased, and the current efficiency was improved. After electrochemical treatment, the O/C ratio of graphite felt surface increases, and the main increase is COOH functional group. The analysis results show that the surface of carbon fiber is etched, and the specific surface area is increased. The increase of the electrode activity is attributed to the increase of the number of COOH functional groups on the surface of carbon fiber and the increase of specific surface area. The small capacity of the battery has been successfully applied in human life, further research and development…
The graphite sintering mould used in powder sintering industry began in the early 70s, accompanied by geological exploration, coal exploration and mining, oil exploration and drilling, highway cutting, especially the rapid development of granite and marble mining and cutting industry, the demand of a substantial amount of diamond alloy material and hard alloy materials the demand for graphite sintering mould increased which is matched with the increases. A wide variety of graphite sintering mould applications which used in powder metallurgy industry are from man-made diamond manufacturing industry. The graphite sintering mould for diamond tools is mainly used in the two fields of building materials and exploration. The graphite sintering mould used for diamond saw blade is mainly in the production…
