Investigation of the Transversal Water Profile in Nafion Membranes in Polymer Electrolyte Fuel Cells
作者： Felix N. Büchi , Günther G. Scherer
DOI: 10.1149/1.1345868
关键词: Diffusion 、 Analytical chemistry 、 Nafion 、 Chemistry 、 Current density 、 Membrane transport 、 Drag coefficient 、 Composite material 、 Semipermeable membrane 、 Anode 、 Membrane
摘要: The in situ resistance of Nafion membranes with different thickness was measured one-dimensional fuel cells as a function current density. Except for the thin Nation I 12 membrane, an increase ionic density (in range 0 to A/cm 2 ) found. thicker stronger same interval. distribution across determined by using composed from several sheets interlying gold wires potential probes. It found that is always confined membrane sheet contacting anode electrode. These measurements, combined results experiments water content, lead conclusion at side due insufficient compensation electro-osmotic drag hack transport anode. Based on solution diffusion mechanism motion experimental may he explained whereby coefficient independent local hydration and D H2O , strong content. data would, qualitatively, also line model proposing convection submicropores membrane.
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