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Electro‐osmotic Drag of Water in Ionomeric Membranes: New Measurements Employing a Direct Methanol Fuel Cell
Open accessAbstract
A direct methanol fuel cell (DMFC) employing a proton conducting membrane was used to determine the electro‐osmotic drag coefficient of water in the ionomeric membrane. Water flux across the membrane in such a cell (operated with 1.0 M aqueous methanol at the anode and dry at the cathode) is driven by protonic drag exclusively at sufficiently high current densities. This is evidenced experimentally by a linear relationship between cell current and flux of water measured crossing the membrane. Application of the DMFC for such water‐drag measurements is significantly simpler experimentally than the approach described by us before, particularly so for measurements above room temperature. In measurements we performed in the DMFC configuration on Nafion® 117 membranes, the water drag coefficient was found to increase with temperature, from 2.0 at 15°C to 5.1 at 130°C. Implications of these new results on water management in DMFCs are briefly discussed.
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Citations
Cited by
On the development of proton conducting polymer membranes for hydrogen and methanol fuel cells
Kreuer, K. D. (2001) · Journal of Membrane Science · doi:10.1016/s0376-7388(00)00632-3 · Cited by 2,969
Kreuer, K.-D., Paddison, S. J., Spohr, E., & Schuster, M. (2004) · Chemical Reviews · doi:10.1021/cr020715f · Cited by 2,187
Recent advances in direct methanol fuel cells at Los Alamos National Laboratory
Ren, X., Zelenay, P., Thomas, S., Davey, J., & Gottesfeld, S. (2000) · Journal of Power Sources · doi:10.1016/s0378-7753(99)00407-3 · Cited by 746
Self-citationA review on water balance in the membrane electrode assembly of proton exchange membrane fuel cells
Dai, W., Wang, H., Yuan, X.-Z., Martin, J. J., Yang, D., Qiao, J., & Ma, J. (2009) · International Journal of Hydrogen Energy · doi:10.1016/j.ijhydene.2009.09.017 · Cited by 420
New membranes for direct methanol fuel cells
Jörissen, L., Gogel, V., Kerres, J., & Garche, J. (2002) · Journal of Power Sources · doi:10.1016/s0378-7753(01)00952-1 · Cited by 279
Metadata
- Authors
- Ren, X., Henderson, W., & Gottesfeld, S.
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 1997-09-01
- Volume
- 144
- Issue
- 9
- Pages
- L267-L270
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W2161773131
- Cited by
- 169
- References
- 0
- FWCI
- 4.52
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Ren, X., Henderson, W., & Gottesfeld, S. (1997). Electro‐osmotic Drag of Water in Ionomeric Membranes: New Measurements Employing a Direct Methanol Fuel Cell. Journal of The Electrochemical Society. https://doi.org/10.1149/1.1837940
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