Degradation of Nafion due to contamination from Swelling-Dehydration Cycles

Research output: Contribution to conference without publisher/journalPosterResearch

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Abstract

Formation of sulfonic anhydride S-O-S (from condensation of sulfonic acids) is known as a possible degradation mechanism for Nafion® membranes under hydrothermal aging condition, which is especially critical for hydrogen fuel cells. A similar mechanism may also contribute to the membrane degradation in direct methanol fuel cells (DMFCs), where liquid water has direct contact with the electrolyte. An ex-situ experiment was established with swelling-dehydration cycles on the membrane. However, formation of sulfonic anhydride was not detected during the entire treatment; instead contamination from traces calcium in the nominally pure water used in the experiment was found to be the primary reason for the deterioration of the membrane properties. Trace impurities in the liquid methanol feed in DMFC may therefore represent an important contamination source.
Original languageEnglish
Publication date3. Jul 2011
Publication statusPublished - 3. Jul 2011
EventSolid State Ionic Conference - 18 - Hotel Marriott, Warszawa, Al. Jerozolimskie 65-79, Warszawa, Poland
Duration: 3. Jul 20128. Jul 2012
Conference number: SSI-18

Conference

ConferenceSolid State Ionic Conference - 18
NumberSSI-18
LocationHotel Marriott, Warszawa, Al. Jerozolimskie 65-79
CountryPoland
CityWarszawa
Period03/07/201208/07/2012

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dehydration
swelling
fuel cell
membrane
methanol
degradation
liquid
electrolyte
condensation
experiment
calcium
hydrogen
contamination
acid
water

Cite this

Andersen, S. M., Morgen, P., & Skou, E. M. (2011). Degradation of Nafion due to contamination from Swelling-Dehydration Cycles. Poster session presented at Solid State Ionic Conference - 18, Warszawa, Poland.
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title = "Degradation of Nafion due to contamination from Swelling-Dehydration Cycles",
abstract = "Formation of sulfonic anhydride S-O-S (from condensation of sulfonic acids) is known as a possible degradation mechanism for Nafion{\circledR} membranes under hydrothermal aging condition, which is especially critical for hydrogen fuel cells. A similar mechanism may also contribute to the membrane degradation in direct methanol fuel cells (DMFCs), where liquid water has direct contact with the electrolyte. An ex-situ experiment was established with swelling-dehydration cycles on the membrane. However, formation of sulfonic anhydride was not detected during the entire treatment; instead contamination from traces calcium in the nominally pure water used in the experiment was found to be the primary reason for the deterioration of the membrane properties. Trace impurities in the liquid methanol feed in DMFC may therefore represent an important contamination source.",
author = "Andersen, {Shuang Ma} and Per Morgen and Skou, {Eivind Morten}",
year = "2011",
month = "7",
day = "3",
language = "English",
note = "Solid State Ionic Conference - 18 ; Conference date: 03-07-2012 Through 08-07-2012",

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Andersen, SM, Morgen, P & Skou, EM 2011, 'Degradation of Nafion due to contamination from Swelling-Dehydration Cycles', Solid State Ionic Conference - 18, Warszawa, Poland, 03/07/2012 - 08/07/2012.

Degradation of Nafion due to contamination from Swelling-Dehydration Cycles. / Andersen, Shuang Ma; Morgen, Per; Skou, Eivind Morten.

2011. Poster session presented at Solid State Ionic Conference - 18, Warszawa, Poland.

Research output: Contribution to conference without publisher/journalPosterResearch

TY - CONF

T1 - Degradation of Nafion due to contamination from Swelling-Dehydration Cycles

AU - Andersen, Shuang Ma

AU - Morgen, Per

AU - Skou, Eivind Morten

PY - 2011/7/3

Y1 - 2011/7/3

N2 - Formation of sulfonic anhydride S-O-S (from condensation of sulfonic acids) is known as a possible degradation mechanism for Nafion® membranes under hydrothermal aging condition, which is especially critical for hydrogen fuel cells. A similar mechanism may also contribute to the membrane degradation in direct methanol fuel cells (DMFCs), where liquid water has direct contact with the electrolyte. An ex-situ experiment was established with swelling-dehydration cycles on the membrane. However, formation of sulfonic anhydride was not detected during the entire treatment; instead contamination from traces calcium in the nominally pure water used in the experiment was found to be the primary reason for the deterioration of the membrane properties. Trace impurities in the liquid methanol feed in DMFC may therefore represent an important contamination source.

AB - Formation of sulfonic anhydride S-O-S (from condensation of sulfonic acids) is known as a possible degradation mechanism for Nafion® membranes under hydrothermal aging condition, which is especially critical for hydrogen fuel cells. A similar mechanism may also contribute to the membrane degradation in direct methanol fuel cells (DMFCs), where liquid water has direct contact with the electrolyte. An ex-situ experiment was established with swelling-dehydration cycles on the membrane. However, formation of sulfonic anhydride was not detected during the entire treatment; instead contamination from traces calcium in the nominally pure water used in the experiment was found to be the primary reason for the deterioration of the membrane properties. Trace impurities in the liquid methanol feed in DMFC may therefore represent an important contamination source.

M3 - Poster

ER -

Andersen SM, Morgen P, Skou EM. Degradation of Nafion due to contamination from Swelling-Dehydration Cycles. 2011. Poster session presented at Solid State Ionic Conference - 18, Warszawa, Poland.