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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…
According to the quality requirements of products, the selection of raw materials and process conditions, the cathode carbon blocks in China are divided into 3 categories: common cathode carbon block, semi graphite carbon block and graphite carbon block. Ordinary cathode carbon block with 1250 to 1350 degrees Celsius calcined anthracite as the main raw material. Semi graphite carbon block according to the production process is divided into two different. Which is a kind of high quality high temperature calcined anthracite or graphite fragments more even with all the bits of graphite as aggregate, green products after forming only after calcination (calcination temperature less than 1200 DEG C) is no longer in the graphite furnace heat treatment, the carbon block called…
The expandable graphite was first discovered by the German scientist Shafautl when he immersed the graphite into concentrated sulfuric acid and nitric acid in 1841. But until the year of 1963, The Union Carbide Company in the United States first applied the patent of preparation of sealing material by the expansion graphite, and it was real used in the industrial production in the beginning of 1968 . Later, Countries in the world have launched the expansion of graphite research and development, and get serious scientific research and results, so in the current , the expansion graphite has become a kind of very important function of graphite materials. The expandable graphite can be rapid expansion, expansion ratio of up to several…
