Water uptake by and transport through Nafion[reg sign] 117 membranes

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2056194· OSTI ID:6962364

Zawodzinski, Jr, T A; Derouin, C; Radzinski, S; Sherman, R J; Smith, V T; Springer, T E; Gottesfeld, S ^[1]

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1. Los Alamos National Lab., NM (United States)

Water uptake and transport properties of Nafion[reg sign] 117 membranes at 30 C are reported here. Specifically, the authors have determined the amount of water taken up by membranes immersed in liquid water and by membranes exposed to water vapor of variable water activity. Transport parameters measured are the diffusion coefficient and relaxation time of water in the membrane and the protonic conductivity of the membrane as functions of membrane water content. The ratio of water molecules carried across the membrane per proton transported, the electro-osmotic drag coefficient, also was determined for a limited number of membrane water contents. The drag coefficient is contrasted with the experimentally determined net water transport across an operating PEM fuel cell.

• OSTI ID: 6962364
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 140:4; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300505* -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
DIFFUSION
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
FUEL CELLS
HYDRATION
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PERMEABILITY
PHYSICAL PROPERTIES
POLYMERS
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
SOLVATION
SORPTION
WATER