Mechanical degradation of proton exchange membrane during assembly and running processes in proton exchange membrane fuel cells with metallic bipolar plates,International Journal of Energy Research

当前位置： X-MOL 学术 › Int. J. Energy Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Mechanical degradation of proton exchange membrane during assembly and running processes in proton exchange membrane fuel cells with metallic bipolar plates
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-06-25 , DOI: 10.1002/er.5550
Wenqing Liu ₁ , Diankai Qiu ₁ , Linfa Peng ₁ , Peiyun Yi ₁ , Xinmin Lai _{1,

2}

Affiliation

The mechanical degradation of the proton exchange membrane (PEM) is one of the main aspects affecting the lifetime of proton exchange membrane fuel cells (PEMFCs). It was observed in our previous study that the stress/strain distribution in the PEM of fuel cells with metallic bipolar plates (BPPs) is more complex, owing to manufacturing and assembly errors of the BPPs. The present study further concentrates on the stress/strain evolution in the membrane of fuel cells throughout the assembly and running processes by a finite element model. In membranes at the joint area between the gasket and gas diffusion layers, a serious stress concentration aggravated as the misalignment displacement increases. As for the membrane in reaction area, the plastic strain reaches highest level at the center of the groove after hygrothermal loading. The maximum stress is mainly relevant to the temperature and humidity and has little concern with the misalignment. The model and results of this study offer guidance regarding the design of PEMFC. Owing to the stress concentration, an additional protection should be set in the joint area, and the assembly error should be limited within 0.05 mm.

中文翻译：

具有金属双极板的质子交换膜燃料电池在组装和运行过程中质子交换膜的机械降解

质子交换膜（PEM）的机械降解是影响质子交换膜燃料电池（PEMFC）寿命的主要方面之一。在我们先前的研究中观察到，由于BPP的制造和组装错误，带有金属双极板（BPP）的燃料电池PEM中的应力/应变分布更加复杂。本研究进一步通过有限元模型集中于燃料电池膜在整个组装和运行过程中的应力/应变演变。在垫片和气体扩散层之间的接合区域处的膜中，随着未对准位移的增加，严重的应力集中加剧。对于反应区中的膜，湿热加载后，塑性应变在凹槽的中心达到最高水平。最大应力主要与温度和湿度有关，而与未对准无关。这项研究的模型和结果为PEMFC的设计提供了指导。由于应力集中，应在连接区域设置额外的保护，并且装配误差应限制在0.05毫米以内。

更新日期：2020-06-25

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11