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Among all the electrode materials used in the vanadium battery,the carbon/graphite felt comprehensive performance is the best,but it still need to do some activation treatment. The commonly used method:heat treatment,acid treatment, electrochemistry treatment etc. The heat treatment of graphite felt is to put it into the heating equipment, like muffle furnace,to make it oxidation around the surface. Some scholars have found that if put the un-modified graphite felt into the H2SO4 solution,the surface of the graphite felt is hydrophobic,and it need about 48h to be complete wetting.under 200℃ heating environment,and after that,the wetting time can be reduce to about 30h,and with the heating temperature increasing,the graphite felt is easier to be wetting. Under the heating temperature at 400℃ in the…
Flexible graphite sheet is light weight and easy to make,the price is much lower.it’s a suitable material to set fluid.this rechargeable battery,with a polyaniline anode and zinc negative pole,and a graphite sheet set fluid,has a reasonable price,large specific area,light weight,easy to use and no pollution to environment. Because of the almost same structure between flexible graphite sheet and natural graphite sheet,so the flexible graphite sheet has a similar property with natural graphite.however,as to the different processing from natural graphite ,so the flexible graphite sheet has some special properties that natural one do not have,such like :high temperature resistance,radiation resistance,chemical erosion resistance,lubrication,sealing,mechanical,easy to mold,etc.Graphite resource is rich in our country,so the development and search of graphite material has a very important…
Vanadium redox flow battery is one of the most development prospect of technology because of the long cycle life, high capacity, flexible design, safe and reliable. Among many carbon materials,the carbon/graphite felt has the most application prospect. Campared with the metal material,the graphite felt has many advantage such like: large specific surface area,good flexibility,easy to machine and install and the price is low,so it’s more suitable to be as electrode material in the vanadium redox flow battery. Now the problem is how to improve the electrochemical activity of graphite felt.The research and development mainly bifurcated graphite felt modification and the preparation of Graphite felt composite electrode. 1) the modification of graphite felt is to improve the property through modify the…
