全钒离子氧化还原液流电池电极活性物质的研究

摘要

介绍了以VOSO4为原料，电解制备全钒离子氧化还原液流电池的正极活性物质V(Ⅴ)盐和负极活性物V(Ⅱ)盐，并用循环伏安法研究了它们在石墨电极上的电化学性质。结果表明，在硫酸溶液中，作为全钒电池的正极和负极V(Ⅴ)／V(Ⅳ)和V(Ⅲ)／V(Ⅱ)电对在石墨电极上的氧化还原反应均为单电子准可逆过程．%Electrolytic method to prepare positive and negative active materials from VOSO4 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.