2008
DOI: 10.1016/j.jpowsour.2008.01.049
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Proton conducting CS/P(AA-AMPS) membrane with reduced methanol permeability for DMFCs

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Cited by 87 publications
(48 citation statements)
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“…To have an approach of the cross-over that should be avoided upon the electrosynthesis reaction of propargyl alcohol, n-propanol is chosen as model alcohol to measure the permeability across the new AAEM prepared in this work as a function of membrane composition, because of the similarity of structure and lower volatility and toxicity than the propargyl alcohol. Results are collected in Table 4, where the permeability values are in the same order or magnitude or even lower than those values reported for methanol cross-over through other AAEMs in alkaline fuel cells, and lower than most common polyelectrolytes such as Nafion [36,[56][57][58]. The permeability of n-propanol through the CS:PVA blend membrane is the lowest and, after the incorporation of the layered titanosilicate, and AS4 and 4VP ionomers into the CS:PVA matrix, the n-propanol permeability increases.…”
Section: Alcohol Permeabilitymentioning
confidence: 85%
“…To have an approach of the cross-over that should be avoided upon the electrosynthesis reaction of propargyl alcohol, n-propanol is chosen as model alcohol to measure the permeability across the new AAEM prepared in this work as a function of membrane composition, because of the similarity of structure and lower volatility and toxicity than the propargyl alcohol. Results are collected in Table 4, where the permeability values are in the same order or magnitude or even lower than those values reported for methanol cross-over through other AAEMs in alkaline fuel cells, and lower than most common polyelectrolytes such as Nafion [36,[56][57][58]. The permeability of n-propanol through the CS:PVA blend membrane is the lowest and, after the incorporation of the layered titanosilicate, and AS4 and 4VP ionomers into the CS:PVA matrix, the n-propanol permeability increases.…”
Section: Alcohol Permeabilitymentioning
confidence: 85%
“…[25]. A frequency response analyzer (FRA, Autolab PGSTST20) over a frequency range of 1-10 6 Hz with an oscillating voltage of 10 mV was used to measure the membrane impedance.…”
Section: Proton Conductivitymentioning
confidence: 99%
“…9. The activation energy of proton conductivity was estimated [25] and presented in Table 6. Proton conductivity increased with the increase of temperature for all the membranes owing to the good water retainability.…”
Section: Proton Conductivitymentioning
confidence: 99%
“…A literatura reporta outros estudos sobre membranas de QTS trocadoras de prótons. 13,14 Para um bom funcionamento da célula a combustível utilizando membranas de QTS, faz-se necessário modificar a composição e/ou adicionar outros materiais, por exemplo, plastificantes e/ou reticulantes, preparar membranas de polímero/polímero ou polímero/material inorgânico. Estas últimas são interessantes devido à contribuição para o aumento da condutividade protônica, manutenção de água em altas temperaturas e, maior sustentação mecânica.…”
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