A fluorinated ionic liquid as a high-performance fuel cell electrolyte

Jeffery Thomson, Patrick Dunn, Lisa Holmes, Jean Phillipe Belieres, C. Austen Angell, Dominic F Gervasio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

This is the first report of a fuel cell with a proton-conducting ionic liquid (pIL) electrolyte that outperforms one with aqueous concentrated (85%) phosphoric acid over all current densities. The new pIL, 2-fluoropyridinium triflate (2-FPTf), is a fluorinated pIL that was made by mixing equimolar amounts of 2-fluoropyridine and triflic acid. A Pt-catalyzed fuel cell fed dry hydrogen and oxygen gases was stable at 80°C with neat 2-FPTf as the electrolyte. The polarization curve showed more than 15% improvement in performance (> 0.1 V cell voltage gain) compared to an identical fuel cell except with aqueous 85% phosphoric acid as the electrolyte. The stability of the fuel cell with 2-FPTf is attributed to it being a fluorinated electrolyte that does not wet Teflon. The improved fuel cell performance is attributed to low water-activity of the electrolyte leading to suppression of oxide formation on Pt and improved cathode performance. This was supported by the voltammetry of Pt in 2-FPTf electrolyte equilibrated with oxygen, which showed oxygen reduction begins near the thermodynamic limit of 1.2 V versus RHE at 80°C.

Original languageEnglish (US)
Title of host publicationECS Transactions
Pages21-29
Number of pages9
Volume13
Edition28
DOIs
StatePublished - 2008
Externally publishedYes
EventProton Transfer and Transport in Fuel Cells - 213th ECS Meeting - Phoenix, AZ, United States
Duration: May 18 2009May 23 2009

Other

OtherProton Transfer and Transport in Fuel Cells - 213th ECS Meeting
CountryUnited States
CityPhoenix, AZ
Period5/18/095/23/09

Fingerprint

Ionic liquids
Fuel cells
Electrolytes
Protons
Phosphoric acid
Oxygen
Voltammetry
Polytetrafluoroethylenes
Cathodes
Current density
Thermodynamics
Polarization
Hydrogen
Oxides
Acids
Electric potential
Gases
Water

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Thomson, J., Dunn, P., Holmes, L., Belieres, J. P., Angell, C. A., & Gervasio, D. F. (2008). A fluorinated ionic liquid as a high-performance fuel cell electrolyte. In ECS Transactions (28 ed., Vol. 13, pp. 21-29) https://doi.org/10.1149/1.3055403

A fluorinated ionic liquid as a high-performance fuel cell electrolyte. / Thomson, Jeffery; Dunn, Patrick; Holmes, Lisa; Belieres, Jean Phillipe; Angell, C. Austen; Gervasio, Dominic F.

ECS Transactions. Vol. 13 28. ed. 2008. p. 21-29.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Thomson, J, Dunn, P, Holmes, L, Belieres, JP, Angell, CA & Gervasio, DF 2008, A fluorinated ionic liquid as a high-performance fuel cell electrolyte. in ECS Transactions. 28 edn, vol. 13, pp. 21-29, Proton Transfer and Transport in Fuel Cells - 213th ECS Meeting, Phoenix, AZ, United States, 5/18/09. https://doi.org/10.1149/1.3055403
Thomson J, Dunn P, Holmes L, Belieres JP, Angell CA, Gervasio DF. A fluorinated ionic liquid as a high-performance fuel cell electrolyte. In ECS Transactions. 28 ed. Vol. 13. 2008. p. 21-29 https://doi.org/10.1149/1.3055403
Thomson, Jeffery ; Dunn, Patrick ; Holmes, Lisa ; Belieres, Jean Phillipe ; Angell, C. Austen ; Gervasio, Dominic F. / A fluorinated ionic liquid as a high-performance fuel cell electrolyte. ECS Transactions. Vol. 13 28. ed. 2008. pp. 21-29
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