ANSTO Publications Online: Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation.

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1051

Title:	Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation.
Authors:	Park, MJ Downing, KH Jackson, A Gomez, ED Minor, AM Cookson, DJ Weber, AZ Balsara, NP
Keywords:	Fuel Cells Protons Copolymers Transport Membranes Humidity Electron Microscopy
Issue Date:	Nov-2007
Publisher:	American Chemical Society
Citation:	Park, M. J., Downing, K. H., Jackson, A., Gomez, E. D., Minor, A. M., Cookson, D., et al. (2007). Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation. Nano Letters, 7(11), 3547-3552.
Abstract:	We establish a new systematic methodology for controlling the water retention of polymer electrolyte membranes. Block copolymer membranes comprising hydrophilic phases with widths ranging from 2 to 5 nm become wetter as the temperature of the surrounding air is increased at constant relative humidity. The widths of the moist hydrophilic phases were measured by cryogenic electron microscopy experiments performed on humid membranes. Simple calculations suggest that capillary condensation is important at these length scales. The correlation between moisture content and proton conductivity of the membranes is demonstrated. © 2007, American Chemical Society
URI:	http://dx.doi.org/10.1021%2Fnl072617l http://apo.ansto.gov.au/dspace/handle/10238/1051
ISSN:	1530-6984
Appears in Collections:	Journal Articles

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