We report the measured water uptake, density, ionic conductivity and water transport properties in Tokuyama A201 membrane in OH−, HCO3− and Cl− forms. The water uptake of the AEM varies with anion type in the order λ(OH−) > λ(HCO3−) > λ(Cl−) for samples equilibrated with the same water vapor activity (aw). The conductivity of the AEM is reduced by absorption of CO2. Pulsed-field gradient nuclear magnetic resonance (PFG-NMR) measurements were utilized to characterize the diffusivity of water and HCO3− ion. The anion diffusion coefficient and membrane conductivity are used to probe the applicability of the Nernst-Einstein equation in these AEMs.
Journal of Power Sources – Elsevier
Published: Mar 15, 2018
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