A Dusty Fluid Model for Predicting Hydroxyl Anion Conductivity in Alkaline Anion Exchange Membranes
A Dusty Fluid Model for Predicting Hydroxyl Anion Conductivity in Alkaline Anion Exchange Membranes
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DOI：
10.1149/1.3273200
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发表时间：
2010-01-01
影响因子：
3.9
通讯作者：
Chiu, Wilson K. S.
中科院分区：
文献类型：
--
作者：
Grew, Kyle N.;Chiu, Wilson K. S.
不含金属阳离子的季铵聚合物碱性阴离子交换膜（AAEM）的进展使人们对碱性燃料电池（AFC）的兴趣最近重新抬头。AAEM支持的碱性环境提供了几个潜在的优势，包括使用具有高能量密度的非贵金属催化剂和物流上有利的燃料和氧化剂（如甲醇和空气）的机会。然而，最近的实验文献表明，AAEM衍生的AFC具有相当大的电阻损耗，这可以归因于AAEM。这项工作描述了一种尘埃流体模型，用于预测AAEM电导率作为相对湿度和膜性能的函数，在初步尝试形成一个框架，了解工作中的过程。一个渗滤模型是用来占膜结构。该模型使用Nafion115电导率数据进行验证。
Advances in metal-cation-free, quaternary ammonium, polymer alkaline anion exchange membranes (AAEMs) have provided a recent resurgence of interest in the alkaline fuel cell (AFC). The alkaline environment supported by the AAEM offers several potential advantages, including opportunities for the use of non-noble metal catalysts with high energy density and logistically favorable fuels and oxidants, such as methanol and air. However, recent experimental literature has shown that the AAEM derived AFCs have considerable resistive losses that can be attributed to the AAEM. This work describes a dusty fluid model used to predict AAEM conductivities as a function of relative humidity and membrane properties in an initial attempt at forming a framework for understanding the processes at work. A percolation model is used to account for the membrane structure. The model is validated using Nafion 115 conductivity data.