Direct visualization of reactant transport in forced convection electrochemical cells and its application to redox flow batteries

Direct visualization of reactant transport in forced convection electrochemical cells and its application to redox flow batteries
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强制对流电化学电池中反应物传输的直接可视化及其在氧化还原液流电池中的应用

DOI:
10.1016/j.elecom.2018.07.002
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发表时间:
2018
影响因子:
5.4
通讯作者:
Rubio-Garcia J
Rubio-Garcia J
中科院分区:
工程技术3区
文献类型:
--
作者:
Rubio-Garcia J

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提出了一种新的、简单的、低成本的电化学发光成像方法,用于监测氧化还原液流电池类系统中的传质现象。将鲁米诺溶液泵送通过具有给定设计的流场(FF)。在流场/电极界面处,染料氧化后发出光,允许直接观察通道、U形弯曲和润湿不良区域。图像分析允许直接可视化反应物分布和通过曲折材料的不良质量传输。将这些结果与具有不同FF的全钒氧化还原液流电池的实验性能作为流量的函数进行了比较,并实现了良好的相关性。
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.
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