Ftir study of ion-pairing effects in plasticized polymer electrolytes

MacFarlane, D. R., Meakin, P., Bishop, A., McNaughton, D., Rosalie, J. M. and Forsyth, M. 1995, Ftir study of ion-pairing effects in plasticized polymer electrolytes, Electrochimica acta, vol. 40, no. 13-14, pp. 2333-2337.

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Title Ftir study of ion-pairing effects in plasticized polymer electrolytes
Author(s) MacFarlane, D. R.
Meakin, P.
Bishop, A.
McNaughton, D.
Rosalie, J. M.
Forsyth, M.
Journal name Electrochimica acta
Volume number 40
Issue number 13-14
Start page 2333
End page 2337
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 1995-10
ISSN 0013-4686
1873-3859
Keyword(s) FTIR
polymer electrolytes
triflate
Summary The effect of plasticizer on the ubiquitous ion-pairing observed in polymer electrolytes has been investigated using FTIR as a probe of the local environment of the triflate ion in sodium and lithium triflate based electrolytes. Plasticizers having a range of properties, such as, propylene carbonate, and dimethyl formamide (DMF), have been investigated in the pure state for comparison with the polymer (a random copolymer of ethylene oxide at propylene oxide (mol ratio 3: 1)). The different plasticizers exhibited strikingly different effects on the triflate ion bands normally observed in polyether salt systems. In particular, the cation associated triflate ion bands at 1288 and 1248 cm−1 and the band at 1272 cm−1 which has variously been assigned to the free ion and also to the strongly aggregated anion, are different. PC produces a rapid disappearance of the “free” ion band in favour of the monodentate ion pair. On the other hand, DMF strongly enhances the band near 1270 cm−1 at salt concentrations higher than 0.7 mol kg−1. These observations are discussed in terms of recent ab initio calculations of the triflate vibrational bands.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1995, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030202

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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