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Plastic crystal phases with high proton conductivity

journal contribution
posted on 01.01.2012, 00:00 authored by A Rana, R Vijayaraghavan, D MacFarlane, Maria ForsythMaria Forsyth
The addition of up to 4 mol% of the strong acids, trifluoromethane sulfonic acid (TfOH) and bis-trifluoromethanesulfonyl imide [HN(Tf) 2], to the organic ionic plastic crystal (OIPC) [Choline][DHP] has been shown to dramatically increase the ionic conductivity by up to three orders of magnitude whilst still retaining the crystalline structure of the OIPC matrix. This enhanced proton diffusivity led to a significant proton reduction reaction in the electrochemical measurements. Powder XRD and DSC thermal analyses strongly suggest that these mixtures are single phase, crystalline materials. The work here also confirms that an increase in TfOH acid concentration (8 mol% and 12 mol%) results in a higher content of the amorphous phase as previously observed for the H 3PO 4/[Choline][DHP] system. © 2012 The Royal Society of Chemistry.

History

Journal

Journal of materials chemistry

Volume

22

Issue

7

Pagination

2965 - 2975

Publisher

Royal Society of Chemistry

Location

Cambridge, England

ISSN

0959-9428

eISSN

1364-5501

Language

eng

Publication classification

C1 Refereed article in a scholarly journal