A novel, simple and low cost electrochemiluminescence imaging method for monitoring mass transport phenomena in a redox flow battery-like system is presented. Luminol solutions were pumped through a flow field (FF) with a given design. At the flowfield/electrode interface light is emitted upon dye oxidation allowing direct visualization of channels, U-bends and regions of poor wetting. Image analysis allows direct visualization of reactant distribution and poor mass transport through tortuous materials. These results were compared with the experimental performance of an all‑vanadium redox flow battery with different FFs as a function of flow and good correlation achieved.

提出了一种新颖，简便，低成本的电化学发光成像方法来监测氧化还原液流电池状系统中的质量传输现象。以给定的设计将Luminol溶液泵送通过流场（FF）。在流场/电极界面处，染料氧化后会发出光，从而可以直接观察通道，U形弯头和润湿性较差的区域。图像分析可以直接观察反应物的分布以及通过曲折材料的不良质量传输。将这些结果与具有不同FFs的全钒氧化还原液流电池的实验性能进行了比较，该电池作为液流的函数并获得了良好的相关性。