Experimental Determination of the Transport Number of Water in Nafion 117 Membrane
Abstract
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.
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Rigorous measurement of proton conductivity, water diffusivity, and electroosmotic drag coefficient for Nafion 1100 was initiated in the early 1990s in works by Zawodzinski et al. and Fuller and Newman.
“The rigorous measurement of these properties for Nafion 1100 was initiated in the early 1990s in a series of works by Zawodzinski et al. [52,53,79,80] and Fuller and Newman [81].”
From Modelling the Proton-Conductive Membrane in Practical Polymer Electrolyte Membrane Fuel Cell (PEMFC) Simulation: A Review (2020) · cites this paper as [81]
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Cited by 278
- Authors
- Fuller, T. F., & Newman, J.
- Affiliations
- Lawrence Berkeley National Laboratory (US)
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 1992-05-01
- Volume
- 139
- Issue
- 5
- Pages
- 1332-1337
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W1987603202
- Cited by
- 278
- References
- 0
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 10 · 2023: 7 · 2022: 11 · 2021: 7 · 2020: 7 · 2019: 9 · 2018: 1 · 2017: 10 · 2016: 6 · 2015: 8 · 2014: 4 · 2013: 11 · 2012: 9
- FWCI
- 4.68
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of The Electrochemical Society (publishedVersion)
- Funders
- Alexander von Humboldt-Stiftung
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Physical Sciences › Engineering › Biomedical Engineering › Membrane-based Ion Separation Techniques
- Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
- Keywords
- Nafion 117, proton exchange membranes, transference number, membrane hydration, membrane dehydration, proton exchange membrane fuel cells, water management (fuel cells)
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