Anisotropic conductivity over in-plane and thickness directions in Nafion-117
Open accessAbstract
Proton conductivity of Nafion-117 membranes in the direction of thickness was measured in , 30–90% relative humidity, by means of 2- and 4-probe methods in thickness direction developed in this group. Heavy conductivity anisotropy of was found over the in-plane and thickness directions for membranes pretreated by hot-pressing at high temperature of and pressures of 1200 and , respectively. On the other hand, no conductivity fade was found for membrane pretreated at in the thickness direction compared to that in the plane direction. Small angle X-ray scattering measurements revealed ion domains flattened along the in-plane direction and ordered along the thickness direction. The origin of the persistent conductivity anisotropy is believed to come from the maximized potential energy barrier for ion transport in interaggregate along the thinned thickness direction.
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At equal humidity, conductivity measured in-plane typically exceeds through-plane conductivity by a factor of 2.5 to 5.
“It has been reported that the in-plane proton conductivity is usually 2.5-5 times higher than the through-plane conductivity when measured at the same humidity condition [29,30].”
From Acid–base blend membranes consisting of sulfonated poly(ether ether ketone) and 5-amino-benzotriazole tethered polysulfone for DMFC (2010) · cites this paper as [29]
The Abstract and p. A2277 report in-plane conductivity 2.5–5 times through-plane conductivity for Nafion-117 membranes hot-pressed at 150°C under 1200 or 600 kgf/cm², respectively. The Abstract also says there was no through-plane conductivity decrease relative to in-plane conductivity at 0 kgf/cm², so the source does not support presenting that ratio as the usual result regardless of pretreatment. (LLM, conf=0.91)
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Cites
Gierke, T. D., Munn, G., & Wilson, F. C. (1981) · Journal of Polymer Science Polymer Physics Edition · doi:10.1002/pol.1981.180191103 · Cited by 1,437 · see citing works
Ion transport and clustering in nafion perfluorinated membranes
Hsu, W. Y., & Gierke, T. D. (1983) · Journal of Membrane Science · doi:10.1016/s0376-7388(00)81563-x · Cited by 981 · see citing works
Proton Conductivity of Nafion 117 as Measured by a Four‐Electrode AC Impedance Method
Sone, Y., Ekdunge, P., & Simonsson, D. (1996) · Journal of The Electrochemical Society · doi:10.1149/1.1836625 · Cited by 942 · see citing works
Cation and Water Diffusion in Nafion Ion Exchange Membranes: Influence of Polymer Structure
Yeager, H. L., & Steck, A. (1981) · Journal of The Electrochemical Society · doi:10.1149/1.2127757 · Cited by 537 · see citing works
Evidence of Elongated Polymeric Aggregates in Nafion
Rubatat, L., Rollet, A., Gebel, G., & Diat, O. (2002) · Macromolecules · doi:10.1021/ma011578b · Cited by 503 · see citing works
Nano structure of NAFION: a SAXS study
Haubold, H. ‐., Vad, T., Jungbluth, H., & Hiller, P. (2001) · Electrochimica Acta · doi:10.1016/s0013-4686(00)00753-2 · Cited by 471 · see citing works
Fujimura, M., Hashimoto, T., & Kawai, H. (1981) · Macromolecules · doi:10.1021/ma50006a032 · Cited by 400 · see citing works
Small-Angle Scattering Study of Water-Swollen Perfluorinated Ionomer Membranes
Gebel, G., & Lambard, J. (1997) · Macromolecules · doi:10.1021/ma970801v · Cited by 308 · see citing works
Conductance of Nafion 117 membranes as a function of temperature and water content
Cappadonia, M. (1995) · Solid State Ionics · doi:10.1016/0167-2738(94)00289-5 · Cited by 287 · see citing works
Investigation of the Transversal Water Profile in Nafion Membranes in Polymer Electrolyte Fuel Cells
Büchi, F. N., & Scherer, G. G. (2001) · Journal of The Electrochemical Society · doi:10.1149/1.1345868 · Cited by 226 · see citing works
Crystallinity in perfluorosulfonic acid ionomers and related polymers
Starkweather, H. W. (1982) · Macromolecules · doi:10.1021/ma00230a023 · Cited by 181 · see citing works
Parthasarathy, A., Davé, B. B., Srinivasan, S., et al. (1992) · Journal of The Electrochemical Society · doi:10.1149/1.2069469 · Cited by 178 · see citing works
AC Impedance Investigations of Proton Conduction in Nafion™
Cahan, B. D., & Wainright, J. S. (1993) · Journal of The Electrochemical Society · doi:10.1149/1.2221160 · Cited by 155 · see citing works
Halim, J., Büchi, F. N., Haas, O., Stamm, M., & Scherer, G. G. (1994) · Electrochimica Acta · doi:10.1016/0013-4686(94)e0051-z · Cited by 151 · see citing works
Electrode kinetics, equivalent circuits, and system characterization: Small-signal conditions
Franceschetti, D. R., & Macdonald, J. R. (1977) · Journal of Electroanalytical Chemistry · doi:10.1016/s0022-0728(77)80262-3 · Cited by 119 · see citing works
Formation and Growth of Surface Films on Graphitic Anode Materials for Li-Ion Batteries
Gnanaraj, J., Thompson, R. W., Iaconatti, S. N., DiCarlo, J., & Abraham, K. M. (2005) · Electrochemical and Solid-State Letters · doi:10.1149/1.1850390 · Cited by 97 · see citing works
Anisotropic ionic conductivity in uniaxially oriented perfluorosulfonate ionomers
Cable, K. M., Mauritz, K. A., & Moore, R. B. (1995) · Chemistry of Materials · doi:10.1021/cm00057a002 · Cited by 61 · see citing works
Nanostructure of Nafion membrane material as a function of mechanical load studied by SAXS
Barbi, V., Funari, S. S., Gehrke, R., Scharnagl, N., & Stribeck, N. (2003) · Polymer · doi:10.1016/s0032-3861(03)00483-x · Cited by 52 · see citing works
Krivandin, A. V., Соловьева, А. Б., Glagolev, N. N., et al. (2003) · Polymer · doi:10.1016/s0032-3861(03)00588-3 · Cited by 41 · see citing works
Experimental analysis of water behavior in Nafion® electrolyte under fuel cell operation
Watanabe, M., Igarashi, H., Uchida, H., et al. (1995) · Journal of Electroanalytical Chemistry · doi:10.1016/0022-0728(95)04323-3 · Cited by 39 · see citing works
Anisotropic resistivity correlated with atomic ordering in p-type GaAsSb
Fink, V., Chevalier, E., Pitts, O. J., et al. (2001) · Applied Physics Letters · doi:10.1063/1.1406982 · Cited by 30 · see citing works
New Synthetic Oligoamide Gelators: Structural Study by X-ray and Neutron Scattering
Schmidt, R., Schmutz, M., Mathis, A., et al. (2002) · Langmuir · doi:10.1021/la0256578 · Cited by 22 · see citing works
Small-angle X-ray scattering investigation of ionomer deformation: effect of neutralizing cation
Visser, S. A., & Cooper, S. L. (1992) · Polymer · doi:10.1016/0032-3861(92)90680-u · Cited by 9 · see citing works
Electrode kinetics, equivalent circuits, and system characterization: Small-signal conditions,
Franceschetti, D. R. (1977) · Journal of Electroanalytical Chemistry (1959) · doi:10.1016/0368-1874(77)80339-0 · Cited by 3 · see citing works
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Research works printed but not linked: 1
- [11]11. A. Kuse, S. Ma, A. Mizugaki, H. Okuda, Z. Siroma, T. Ioroi, K. Yasuda, and Y. Miyazaki, in Proceedings of the 11th FCDIC Fuel Cell Symposium, p. 262 ͑2004͒.
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Anion-exchange membranes in electrochemical energy systems
Varcoe, J. R., Atanassov, P., Dekel, D. R., Herring, A. M., Hickner, M. A., Kohl, P. A., Kucernak, A. R., Mustain, W. E., Nijmeijer, K., Scott, K., et al. (2014) · Energy Environ. Sci. · doi:10.1039/c4ee01303d · Cited by 2,051 · see citing works
Soboleva, T., Xie, Z., Shi, Z., Tsang, E., Navessin, T., & Holdcroft, S. (2008) · Journal of Electroanalytical Chemistry · doi:10.1016/j.jelechem.2008.05.017 · Cited by 264 · see citing works
Li, W., Manthiram, A., & Guiver, M. D. (2010) · Journal of Membrane Science · doi:10.1016/j.memsci.2010.06.059 · Cited by 75 · see citing works
- Authors
- Ma, S., Siroma, Z., & Tanaka, H.
- Affiliations
- National Institute of Advanced Industrial Science and Technology (JP)
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 2006
- Volume
- 153
- Issue
- 12
- Pages
- A2274
- ISSN
- 0013-4651 (ISSN-L)
- OpenAlex
- W2043968050
- Cited by
- 71
- References
- 24
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 4 · 2023: 7 · 2022: 2 · 2021: 4 · 2020: 2 · 2019: 5 · 2018: 3 · 2017: 1 · 2016: 5 · 2015: 3 · 2014: 3 · 2013: 4 · 2012: 3
- FWCI
- 3.37
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of The Electrochemical Society (publishedVersion)
- 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 conductivity, anisotropic conductivity, thickness direction, hot pressing, membrane pretreatment, small-angle X-ray scattering, relative humidity
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