Development of a Reference Electrode for a PEMFC Single Cell Allowing an Evaluation of Plate Potentials
Development of a Reference Electrode for a PEMFC Single Cell Allowing an Evaluation of Plate Potentials
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开发用于 PEMFC 单电池的参比电极，可评估极板电位
DOI：
10.1115/1.4000674
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
L. Antoni
中科院分区：
文献类型：
--
作者：
J. André;N. Guillet;J. Petit;L. Antoni
提高不锈钢板质子交换膜燃料电池（PEMFC）的寿命和性能是其关键。需要在板材料的钝化性和电接触电阻之间进行良好的折衷。在燃料电池运行期间测量每个板的电势对于导致相关的非原位测试以研究新材料是至关重要的。从用于电位测量的方法的审查，目前的工作集中在实现和使用的动态氢电极（DHE）装置作为参考电极在PEMFC单电池和它的准确性和漂移方面的评价。在将经典参比电极引入流场中的情况下，由于在操作电池时不可能确保参比电极与板之间的良好且稳定的离子电导率，因此测量显示为无关的。在文献中发现的DHE的几个例子进行了审查，并用于实现DHE，这表明正确的准确性和稳定性，其潜力充分加湿条件下。实验结果表明，该装置可靠，易于适应不同的单细胞。它被用来调查瞬态现象，而循环的电池，但需要一些改进时，电池与不饱和气体操作。
Increasing lifetime and performance is critical for proton exchange membrane fuel cell (PEMFC) using stainless steel plates. A good compromise between passivity and electrical contact resistance of the plate material is required. Measuring the potential of each plate during fuel cell operation is of paramount importance to lead to relevant ex situ tests in order to investigate new materials. From a review on methods used for potential measurements, the present work focused on the realization and use of a dynamic hydrogen electrode (DHE) device as a reference electrode in a PEMFC single cell and its evaluation in terms of accuracy and drift. With classic reference electrodes introduced into the flow field, measurements were shown to be irrelevant because of the impossibility to ensure good and stable ionic conductivity between the reference electrode and the plate when operating the cell. Several examples of DHE found in the literature were reviewed and used to realize a DHE, which showed correct accuracy and stability of its potential under fully humidified conditions. The experimental device was shown to be reliable and easily adaptable for different single cells. It was used to investigate transient phenomena while cycling a cell, but needs some improvement when the cell is operated with unsaturated gases.