关键词: 钒电池, 钛酸酯偶联剂, 复合材料

Abstract: The composite electrode used in the vanadium redox battery was modified by adding titanate coupling agent in three ways: direct mixing with carbon-black, dissolving and mixing in ethanol, and dissolving in kerosene. The effect of titanate coupling agent on the resisitivity and electrochemical property of composite electrode was tested. It was observed that titanate coupling agent and carbon-black could not be mixed up uniformly neither by direct mixing nor by dissolving in ethanol. The results showed that the resistivity of composite electrode was reduced by adding titanate coupling agent dissolved in kerosene. This phenomenon was explained with the SEM microphotographs of the composite. The cyclic voltammograms of composite electrode demonstrate that titanate coupling agent in the composite electrode may introduce minor side-reaction in the electrode in vanadium redox battery.

Key words: vanadium redox battery, titanate coupling agent, composite electrode