News
Vanadium battery is a new type of energy storage battery developed in recent years, because of its high energy efficiency and long service life. Environmental friendly and cheap, operating and maintenance costs low, many of the characteristics of the rapid development of. But at present, there are some problems in vanadium battery. There are many factors that affect the performance of vanadium battery, including the electrode material performance, the positive and negative electrode reaction is an important factor. Graphite felt has a series of excellent properties, such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, conductivity and thermal expansion coefficient, so it is used in the field of vanadium battery. However, it is found that the…
Acid graphite rod as non metal products, as carbon arc gouging cutting process in an essential pre welding cutting supplies, is composed of carbon and graphite with appropriate adhesive, through the extrusion, the temperature of 2200 DEG C after baking rotary plating a layer made from copper, high temperature resistance, good electrical conductivity, not easy to fracture, suitable for metal cutting into required shape. Due to the acid resistant graphite rod using the temperature of high conductivity and good chemical stability. It has been widely used in machinery, metallurgy, national defense, chemical, foundry, non-ferrous alloy, light and other fields, especially the black acid graphite rod, was also used for the field of ceramics, semiconductors, medicine, environmental protection, laboratory analysis, become…
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…
