Graphite-acetylene black composite electrodes for all vanadium redox flow battery

作者：Zhang Yuan Ming^*; Huang Qi Ming; Li Wei Shan; Peng Hai Yan; Hu She Jun

来源：Journal of Inorganic Materials, 2007, 22(6): 1051-1055.

• all vanadium redox flow battery
• graphite
• acetylene black
• composite electrodes

The voltammetric behaviors of graphite (GP) and its composites with acetylene black (AB) were studied in 5mol/L H2SO4 1mol/L VOSO4 solution with cyclic voltammetry (CV), and surface morphologies of the composites were observed with scan electron microscope (SEM). The results obtained with voltammetry show that the redox couples of V(IV)/V(V) and V(11)/V(III), as positive and negative electrodes of all vanadium flow liquid battery, respectively, have good reversibility but low current on the GP electrode, and the current can be improved by AB. The SEM observation shows that the granulars of AB are dispersed evenly on the surface of sheet GP when they are mixed together. The best compositions for the positive and the negative of all vanadium flow liquid battery determined by comparing voltammetric behavior of the composite electrodes with different content of AB, are (omega(AB) : omega(GP)) 15:85 for the positive and 4:96 for the negative.

• 出版日期2007-11
• 单位华南师范大学