2004
DOI: 10.1002/chin.200450274
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Transport in Proton Conductors for Fuel‐Cell Applications: Simulations, Elementary Reactions, and Phenomenology

Abstract: For Abstract see ChemInform Abstract in Full Text.

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Cited by 126 publications
(201 citation statements)
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References 253 publications
(413 reference statements)
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“…Another observation necessary to stress is the larger Mg 2+ /Na + mobility ratio in F9120 as compared with the ratios in the other two CEMs, this is in accordance with the fact that perfluorosulfonic CEMs have larger ionic channels in the membrane matrix when fully hydrated [49,50]. The F9120 membranes with Mg 2+ and Na + counter ions are in general more conductive than corresponding hydrocarbon-based CEMs (SPEEK and CMX).…”
Section: Membrane Conductivitysupporting
confidence: 56%
“…Another observation necessary to stress is the larger Mg 2+ /Na + mobility ratio in F9120 as compared with the ratios in the other two CEMs, this is in accordance with the fact that perfluorosulfonic CEMs have larger ionic channels in the membrane matrix when fully hydrated [49,50]. The F9120 membranes with Mg 2+ and Na + counter ions are in general more conductive than corresponding hydrocarbon-based CEMs (SPEEK and CMX).…”
Section: Membrane Conductivitysupporting
confidence: 56%
“…1 A prototypical PEFC membrane consists of a phase-separated polymer with interconnected conductive, nanoscale, aqueous domains embedded in a nonconductive matrix that provides structural integrity and durability. [2][3][4] Interactions between appended charged polymer groups and aqueous counterions cause ion-transport behavior in the aqueous domains to differ from that in bulk aqueous solution. [3][4] To understand how molecular interactions among polymer, water, and ions at the nanoscale mediate transport at the macroscale, we formulate a multiscale mechanistic model for ion transport in fuel-cell membranes.…”
Section: Introductionmentioning
confidence: 99%
“…Unfavorable interactions between the hydrophilic sulfonate moiety and the hydrophobic backbone cause the polymer to phase separate into solid polymer bundles and an interconnected network of ionically conductive, hydrophilic domains or "pores." [2][3][4][5] Because the ionic conductivity of PFSA membranes increases drastically with water content, PEFC membranes typically operate under humidified conditions. 1 A wet environment leads to water absorption into the hydrophilic domains of the membrane with the subsequent water content described as the molar ratio of water per sulfonate site, λ (mole H 2 O/mole SO 3  ).…”
Section: Introductionmentioning
confidence: 99%
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