Experimental determination of the transport number of water in Nafion 117 membrane

Journal Article · Fri May 01 04:00:00 EDT 1992 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2069407· OSTI ID:6931249

Fuller, T F; Newman, J ^[1]

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1. California Univ., Berkeley, CA (United States). Dept. of Chemical Engineering

The transport number of water in Nafion 117 membrane over a wide range of water contents is determined experimentally using a concentration cell. The transport number of water, the ratio f[sup m][sub o]/Z[sub o], is about 1.4 for a membrane equilibrated with saturated water vapor at 25[degrees]C, decreases slowly as the membrane is dehydrated, and falls sharply toward zero as the concentration of water approaches zero. In this paper, the relationship between the transference number, the transport number, and the electro-osmotic drag coefficient is presented, and their relevance to water management is solid-polymer-electrolyte fuel cells is discussed. Results are compared with other data available in the literature and with the theoretical maximum.

• OSTI ID: 6931249
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 139:5; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300502* -- Fuel Cells-- Performance & Testing
300505 -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
CHEMISTRY
DATA
DIFFUSION
DIRECT ENERGY CONVERTERS
DRAG
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
EXPERIMENTAL DATA
FUEL CELLS
HYDROGEN COMPOUNDS
INFORMATION
MEMBRANES
NUMERICAL DATA
OSMOSIS
OXYGEN COMPOUNDS
PERFORMANCE TESTING
SOLID ELECTROLYTE FUEL CELLS
TESTING
WATER