Abstract

The problem of water management in a fuel cell with a polymer electrolyte membrane (PEM) under low humidity conditions is most acute. The addition of adsorbents to a membrane improves the water-holding properties of PEMs. A stationary one-dimensional computer model is developed to analyze the distribution of water in the layers of membrane electrode assembly. An ionomer layer modified with an adsorbent is taken into account to increase the concentration of water in the membrane. The spatial distribution of the concentration of water in the catalytic layer and PEM for a standard membrane and a membrane containing a surface modified layer is obtained. The best distribution of water in the membrane is achieved through the addition of a layer with a threefold increase in water capacity from the side adjacent to a cathode catalytic layer.

中文翻译：

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表面改性的膜在低湿度条件下稳定燃料电池水平衡的模型研究

摘要

在低湿度条件下具有聚合物电解质膜（PEM）的燃料电池中的水管理问题最为严重。向膜中添加吸附剂可改善PEM的保水性。开发了固定的一维计算机模型来分析膜电极组件各层中水的分布。考虑用吸附剂改性的离聚物层以增加膜中水的浓度。获得了标准膜和含有表面改性层的膜中催化层和PEM中水浓度的空间分布。通过在与阴极催化层相邻的一侧添加水容量增加三倍的层，可以实现膜中水的最佳分布。