Study on Electrode Active Materials for all Vanadium Redox Flow Battery

Electrolytic method to prepare positive and negative active materials from VOSO 4 sulphuric acid solution for all vanadium redox flow battery is described.V(Ⅴ)salt is obtained in anode area and V(Ⅱ)salt is in cathode area.The electrochemical behaviour of the two series salt on graphite electrode have also been studied by cyclic voltammetry.The results showed that the redox reactions of V(Ⅴ)/V(Ⅳ) and V(Ⅲ) /V(Ⅱ) couples in sulfuric adid,which are used for anolyte and catholyte in a redox flow battery,is qusi reversible.