Published December 8, 2004
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Journal Article
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Fluorinated Imidazoles as Proton Carriers for Water-Free Fuel Cell Membranes
Chicago
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Abstract
We propose an alternative new material (2,4,5-trifluoroimidazole impregnated Nafion) for use as a high-temperature, water-free membrane for proton-exchange membrane fuel cells. This material has been tested computationally using molecular dynamics and quantum mechanics techniques, leading to an estimated conductivity of ∼0.06 S/cm at 177 °C. This material overcomes the weakness of the imidazole-impregnated membranes, i.e., the poisoning of the Pt electrode. We find that 2,4,5-trifluoroimidazole binds weakly to platinum surfaces, so poisoning is not expected.
Additional Information
© 2004 American Chemical Society. Received 21 May 2004. Published online 11 November 2004. Published in print 1 December 2004. We thank Seung Soon Jang for his help with the Nafion model, and the reviewers' useful comments to improve the proton diffusion calculation method. This work was partially supported by DOE (DE-FC26-02NT41631) and ONR (N00014-02-1-0665). The facilities of the Materials and Process Simulation Center are supported by ONR-DURIP, ARO-DURIP, MURI-ARO, MURI-ONR, DOE (ASC, FETL), NSF (CHE), NIH, Aventis Pharma, Chevron Texaco, Nissan Corp., Berlix Biopharma, and Beckman Institute.Attached Files
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Additional details
- Eprint ID
- 76769
- Resolver ID
- CaltechAUTHORS:20170420-115315852
- Department of Energy (DOE)
- DE-FC26-02NT41631
- Office of Naval Research (ONR)
- N00014-02-1-0665
- Army Research Office (ARO)
- NSF
- NIH
- Aventis Pharma
- Chevron Texaco
- Nissan Corp.
- Berlix Biopharma
- Caltech Beckman Institute
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2017-04-20Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field