Modifications of Sulfonic Acid-Based Membranes

Aricò, A.S.; Baglio, V.; Lufrano, F.; Stassi, A.; Gatto, Irene; Merlo, Luca

doi:10.1007/978-3-319-17082-4_2

Cited by 1 publication

(2 citation statements)

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“…The high glass transition temperature of the SSC ionomer membranes enhances the fuel cell operating temperature by around 40 °C compared to LSC ionomers, thus exceeding the target value of 120 °C for automotive applications. , The higher operating temperature implies higher tolerance of Pt-based catalyst to poisoning species and contaminants . PEMs based on SSC ionomer are also less prone to radical attack because of their higher crystallinity and reduced swelling, which suppress gas crossover.…”

Section: Introductionmentioning

confidence: 99%

“…27,28 The higher operating temperature implies higher tolerance of Ptbased catalyst to poisoning species and contaminants. 29 PEMs based on SSC ionomer are also less prone to radical attack because of their higher crystallinity and reduced swelling, which suppress gas crossover. Moreover, SSC ionomers do not contain the ether linkages in the side chain, which render LSC ionomers highly susceptible to radial attack.…”

Section: Introductionmentioning

confidence: 99%

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Aquivion Ionomer in Mixed Alcohol–Water Solution: Insights from Multiscale Molecular Modeling

et al. 2020

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Short side-chain ionomers such as Aquivion are increasingly used in the fabrication of polymer electrolyte membrane fuel cells. Aquivion exhibits reduced gas crossover, enhanced glass transition temperature, better mechanical stability, and higher conductivity in comparison to Nafion, their long side chain relative. We performed atomistic molecular dynamics simulations of Aquivion at varying water contents and proportion of isopropanol mixed into the solvent and examined the structure and dynamics of the system. Atomistic simulations are followed by coarse-grained simulations to develop a coarse-grained model applicable to both long and short side chain ionomers. The density of Aquivion and Nafion membranes from simulations is calculated and compared with that from the experiment. The Aquivion system shows higher diffusion coefficients for water molecules and hydronium ions than the Nafion system. The water network morphology is analyzed as a function of water content.

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Section: Introductionmentioning

confidence: 99%