A Dusty Fluid Model for Predicting Hydroxyl Anion Conductivity in Alkaline Anion Exchange Membranes

被引:167
作者
Grew, Kyle N. [1 ]
Chiu, Wilson K. S. [1 ]
机构
[1] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA
关键词
alkaline fuel cells; ionic conductivity; membranes; polymer films; MOLECULAR-DYNAMICS SIMULATION; POLYMER-ELECTROLYTE MEMBRANES; PROTON TRANSPORT; WATER TRANSPORT; FUEL-CELLS; DIFFUSION; NAFION; THERMODYNAMICS; SOLVATION; METHANOL;
D O I
10.1149/1.3273200
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
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.
引用
收藏
页码:B327 / B337
页数:11
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