Acoustic Emission Analysis of Polymer Electrolyte Membrane Fuel Cells
Acoustic Emission Analysis of Polymer Electrolyte Membrane Fuel Cells
复制标题
DOI：
10.1149/09809.0177ecst
复制
发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
V. S. Bethapudi;G. Hinds;P. Shearing;D. Brett;M. Coppens
中科院分区：
文献类型：
--
作者：
V. S. Bethapudi;G. Hinds;P. Shearing;D. Brett;M. Coppens
采用声发射（AE）分析方法对聚合物电解质膜燃料电池（PEMFC）的性能进行了表征。极化扫描表明，电池温度从45°C增加到60°C导致最大电流密度由于电池脱水而下降。在极化过程中从PEMFC产生的声学活动的参数分析建立了电池操作条件和相应的AE产生之间的关系。最佳和脱水的细胞条件下产生的声学事件，分别稳定和减少的数量，这是有关的水流和它的物理状态的流场。此外，用于水合分析的AE参数是振幅和计数，其分别对应于超过阈值产生的AE的强度和比例;这些受电流密度、反应物湿度和电池温度的影响。
The performance of a polymer electrolyte membrane fuel cell (PEMFC) is characterized using acoustic emission (AE) based analysis. Polarization scans indicate that an increase in cell temperature from 45°C to 60°C results in a drop in maximum current density due to cell dehydration. Parametric analysis of acoustic activity generated from the PEMFC during polarization establishes a relationship between the cell operating conditions and the corresponding AE generated. Optimal and dehydrated cell conditions result in stable and reduced numbers of generated acoustic events, respectively, which are related to the flow of water and its physical state in the flow-fields. Furthermore, the AE parameters utilized for hydration analysis are amplitude and counts, which correspond to intensity and proportion of AE generated beyond a threshold, respectively; these are influenced by current density, reactant humidity, and cell temperature.