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Porous Polybenzimidazole Membranes Doped with Phosphoric Acid: Highly Proton-Conducting Solid Electrolytes
Abstract
New proton-conducting polymer electrolytes based on new porous films of polybenzimidazole doped with phosphoric acid have been obtained. The porous polybenzimidazole films were prepared by leaching out a low-molecular-weight compound using a selective solvent of the porogen from polymer/porogen mixtures. This method allows control over the porosity level up to porosities of 75%. The pore size and morphology strongly depend on the porogen/PBI ratio as observed by SEM. The pore size varies from <100 nm with spherical shape for low porosities to very irregular and interconnected structures of 10−15 μm at the highest porosity levels. Different porogens lead to smaller pore sizes in the order dibutyl phthalate>dimethyl phthalate>diphenyl phthalate>triphenyl phosphate. The acid uptake of the membranes, and therefore the ionic conductivity of the films, increases with the porosity. Ionic conductivity as high as 5 × 10 - 2 S/cm and mechanically stable membranes are easily obtained by soaking the highly porous films in phosphoric acid solutions.
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Citations
Cites
Proton conduction in acid doped polybenzimidazole
Bouchet, R. (1999) · Solid State Ionics · doi:10.1016/s0167-2738(98)00466-4 · Cited by 501
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Asensio, J. A., Sánchez, E. M., & Gómez-Romero, P. (2010) · Chemical Society Reviews · doi:10.1039/b922650h · Cited by 746
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Serrano, E., Rus, G., & García-Martínez, J. (2009) · Renewable and Sustainable Energy Reviews · doi:10.1016/j.rser.2009.06.003 · Cited by 631
Asensio, J. A., & Gómez‐Romero, P. (2005) · Fuel Cells · doi:10.1002/fuce.200400081 · Cited by 274
Metadata
- Authors
- Mecerreyes, D., Grande, H., Miguel, O., Ochoteco, E., Marcilla, R., & Cantero, I.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-01-28
- Volume
- 16
- Issue
- 4
- Pages
- 604-607
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W1990982074
- Cited by
- 197
- References
- 1
- FWCI
- 8.17
- Type
- journal article
- Language
- en
- Open access
- closed
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