News
In order to enhance the oxidation resistance of graphite mould and prolong its service life, it is necessary to reduce the gasification reaction rate of graphite material at high temperature. Under normal circumstances, there are three factors affecting the gasification reaction of graphite materials: (1) graphitization degree of carbon graphite material increased, the activity of gas decreased, gasification reaction rate was slow. The higher the heat treatment temperature of carbon materials, the higher the temperature of the starting oxidation. (2) the state of the surface of the structure is loose and porous carbon graphite material, easy to react with the gas, and the surface of carbon graphite material, not easy to react with gas. For example, after 3200 degrees of…
Flow battery is to achieve large-scale renewable energy application of new green secondary battery two, the performance of electrode materials has important significance for the practical application of the flow battery, PAN based graphite felt electrode material is the preferred flow battery, in order to further improve the hydrophilicity and electrochemical activity of the modified Shi Mozhan electrode materials, graphite related research in recent years the carpet has become a hot spot. Energy storage technology is very conducive to the balance between energy production and consumption between the control in power, plays an important role in the integration of renewable energy and other areas, as one of the electrochemical energy storage technology flow battery, the redox flow battery, with current…
Graphite is charactered by good conductivity, good heat conduction and rust-resistance, but graphite contains many pores during their manufacturing process inevitably. H2 and O2 will be mixed if the graphite bipolar plates which contain pores are used in PEMFC ( proton exchange membrane fuel cell) , and the performance of fuel cell is low . Graphite bipolar plates were impregnated by thick Na2SiO3 solution in vacuum and pressure. Na2SiO3 in graphite plate was turned into SiO2 after being reacted with acid and heated. Porosity of graphite plate dropped to 3. 3 %from 18. 2%.No H2 leakage occurred at the pressure of 0 . 3 MPa.The resistance of graphite plate after impregnation did not rise. The voltage of fuel cell used…
