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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4530

Title: Anionic-exchange membrane development for application in alcohol alkaline fuel cells
Authors: Nonjola, S
Keywords: Polysulfone
Anionic exchange membranes
Water uptake
Mechanical properties
Ionic conductivity
Alkaline fuel cell
Issue Date: Sep-2010
Citation: Nonjola, S. 2010. Anionic-exchange membrane development for application in alcohol alkaline fuel cells. Presentation (excl conference presentations)
Series/Report no.: Conference Presentation
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.
Description: Presentation (excl conference presentations)
URI: http://hdl.handle.net/10204/4530
Appears in Collections:National Centre for nano-structured materials
Manufacturing science and technology
General science, engineering & technology

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