Lithium polyelectrolyte–ionic liquid systems

Sun, J., MacFarlane, D. R. and Forsyth, M. 2002, Lithium polyelectrolyte–ionic liquid systems, Solid state ionics, vol. 147, no. 3-4, pp. 333-339.

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Title Lithium polyelectrolyte–ionic liquid systems
Author(s) Sun, J.
MacFarlane, D. R.
Forsyth, M.
Journal name Solid state ionics
Volume number 147
Issue number 3-4
Start page 333
End page 339
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2002-04
ISSN 0167-2738
1872-7689
Keyword(s) lithium polyelectrolyte
methanesulfonate ionic liquids
conductivity
7Li-NMR
ion mobility
Summary Novel lithium polyelectrolyte–ionic liquid systems, using poly(lithium 2-acrylamido-2-methyl propanesulfonate) and its copolymer with N-vinyl formamide, have been developed in this work. The ionic liquid used in this work is from a novel family of methanesulfonate ionic liquids, specifically N-hexyl-N,N,N-tributyl ammonium methanesulfonate, which is chosen because of the similarity with the anionic functionality of the polymer. The ionic liquid thereby acts as a good solvating medium for the polyelectrolyte. It was found that the copolymer-based polyelectrolyte–ionic liquid system exhibits two to three times higher conductivity than that of the homopolymer system. The results of solid-state 7Li-NMR have shown that lithium cations in the copolymer system are mobile whereas in the homopolymer, only a fraction appears to be mobile even at 80 °C. This supports the hypothesis that separation of the charged groups on the polymer backbone via the co-monomer encourages the dissociation of lithium cations from the sulfonate groups bonded to the polymer chains, and hence, results in an increase in conductivity of the polyelectrolyte material.
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 ©2002, Elsevier Science B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030272

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