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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…
All vanadium redox flow battery (VRB battery, VRB) is a new type of green environmental protection battery, has the advantages of high efficiency, long service life, safe and reliable, can be used as a large energy storage device, the wind, hydro, solar and other unstable energy into electrical energy storage to be used as a backup power supply has a wide application prospect. The hydrophilic and electrochemical activity of PAN based (PAN) graphite felt is poor and the graphite felt needs to be modified to be better used in vanadium battery. In order to improve the electrochemical activity of graphite felt, the two cerium oxide was modified on graphite felt by ethanol solution method and sol gel method. Two cerium…
