Predicting performance stability of anion exchange membrane fuel cells
Predicting performance stability of anion exchange membrane fuel cells
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DOI：
10.1016/j.jpowsour.2019.02.069
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发表时间：
2019-04-30
影响因子：
9.2
通讯作者：
Brandon, Simon
中科院分区：
文献类型：
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作者：
Dekel, Dario R.;Rasin, Igal G.;Brandon, Simon
阴离子交换膜燃料电池（AEMFC）正吸引越来越多的关注，主要是由于该技术的潜力，大大降低燃料电池设备的成本。然而，它们的开发和实施受到膜和离聚物在电池操作期间的分解的显著阻碍。在这项研究中，我们提出并应用一个独特的一维模型能够预测，第一次，AEMFC的性能稳定性。该模型考虑了离聚物材料的降解及其与局部水合的关系，这取决于电池材料性质、设计参数和操作条件。使用这个模型，我们成功地证明了强烈的影响，工作电流密度和膜特性的性能稳定性的一个代表电池。预测的电池稳定性为设计和开发高稳定性的AEMFC提供了重要的见解。通过使用具有可实现的目标特性的膜，该模型预测AEMFC的寿命高于5000 h，适用于汽车应用。
Anion-exchange membrane fuel cells (AEMFCs) are attracting increasing attention worldwide mainly due to this technology's potential to considerably reduce fuel cell device costs. However, their development and implementation is significantly handicapped by the membrane and ionomer's decomposition during cell operation. In this study we propose and apply a unique one-dimensional model capable of predicting, for the first time, the performance stability of AEMFCs. The model accounts for the ionomeric material degradation and its relationship with local hydration, which depends on cell material properties, design parameters and operating conditions. Using this model, we successfully demonstrate the strong impact of operating current density and membrane characteristics on the performance stability of a representative cell. The predicted cell stability provides critical insights for the design and development of highly stable AEMFCs. By using membranes with achievable targeted properties, the model predicts an AEMFC life-time higher than 5000 h, suitable for automotive applications.