dc.contributor.author |
Nonjola, S
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|
dc.date.accessioned |
2010-11-05T09:40:22Z |
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dc.date.available |
2010-11-05T09:40:22Z |
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dc.date.issued |
2010-09 |
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dc.identifier.citation |
Nonjola, S. 2010. Anionic-exchange membrane development for application in alcohol alkaline fuel cells. Presentation (excl conference presentations) |
en |
dc.identifier.uri |
http://hdl.handle.net/10204/4530
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dc.description |
Presentation (excl conference presentations) |
en |
dc.description.abstract |
Ammonium quaternized polymers such as poly (arylene ether sulfones) are being developed and studied as candidates of ionomeric materials for application in alkaline fuel cells, due to their low cost and promising electrochemical properties. In this work, a quaternary ammonium polymer was synthesized by chloromethylation of a commercial polysulfone followed by amination process. Quaternized polysulfone membrane properties such us water and water-methanol uptake, electrical conductivity and Young's modulus were evaluated and compared to Nafion 117, commonly employed in direct methanol fuel cells. The anionic polysulfone membrane sorbs more water than Nafion all over the whole range of water activities, but it uptakes much less methanol as compared to Nafion. The specific conductivity of the fully hydrated polysulfone membrane equilibrated with KOH solutions at ambient temperature increases with the KOH concentration, reaching a maximum of 0.083 S cm1 for 2 M KOH, slightly less conductive than Nafion 117. The elastic modulus of the polysulfone membranes inmersed in water is similar to that reported for Nafion membranes under the same conditions. They authors concluded that quaternized polysulfone membrane are good candidates as electrolytes in alkaline direct methanol fuel cells. |
en |
dc.language.iso |
en |
en |
dc.relation.ispartofseries |
Conference Presentation |
en |
dc.subject |
Polysulfone |
en |
dc.subject |
Anionic exchange membranes |
en |
dc.subject |
Water uptake |
en |
dc.subject |
Mechanical properties |
en |
dc.subject |
Ionic conductivity |
en |
dc.subject |
Alkaline fuel cell |
en |
dc.title |
Anionic-exchange membrane development for application in alcohol alkaline fuel cells |
en |
dc.type |
Conference Presentation |
en |
dc.identifier.apacitation |
Nonjola, S. (2010). Anionic-exchange membrane development for application in alcohol alkaline fuel cells. http://hdl.handle.net/10204/4530 |
en_ZA |
dc.identifier.chicagocitation |
Nonjola, S. "Anionic-exchange membrane development for application in alcohol alkaline fuel cells." (2010): http://hdl.handle.net/10204/4530 |
en_ZA |
dc.identifier.vancouvercitation |
Nonjola S, Anionic-exchange membrane development for application in alcohol alkaline fuel cells; 2010. http://hdl.handle.net/10204/4530 . |
en_ZA |
dc.identifier.ris |
TY - Conference Presentation
AU - Nonjola, S
AB - Ammonium quaternized polymers such as poly (arylene ether sulfones) are being developed and studied as candidates of ionomeric materials for application in alkaline fuel cells, due to their low cost and promising electrochemical properties. In this work, a quaternary ammonium polymer was synthesized by chloromethylation of a commercial polysulfone followed by amination process. Quaternized polysulfone membrane properties such us water and water-methanol uptake, electrical conductivity and Young's modulus were evaluated and compared to Nafion 117, commonly employed in direct methanol fuel cells. The anionic polysulfone membrane sorbs more water than Nafion all over the whole range of water activities, but it uptakes much less methanol as compared to Nafion. The specific conductivity of the fully hydrated polysulfone membrane equilibrated with KOH solutions at ambient temperature increases with the KOH concentration, reaching a maximum of 0.083 S cm1 for 2 M KOH, slightly less conductive than Nafion 117. The elastic modulus of the polysulfone membranes inmersed in water is similar to that reported for Nafion membranes under the same conditions. They authors concluded that quaternized polysulfone membrane are good candidates as electrolytes in alkaline direct methanol fuel cells.
DA - 2010-09
DB - ResearchSpace
DP - CSIR
KW - Polysulfone
KW - Anionic exchange membranes
KW - Water uptake
KW - Mechanical properties
KW - Ionic conductivity
KW - Alkaline fuel cell
LK - https://researchspace.csir.co.za
PY - 2010
T1 - Anionic-exchange membrane development for application in alcohol alkaline fuel cells
TI - Anionic-exchange membrane development for application in alcohol alkaline fuel cells
UR - http://hdl.handle.net/10204/4530
ER -
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en_ZA |