Lithium ion mobility in poly(vinyl alcohol) based polymer electrolytes as determined by 7Li NMR spectroscopy

Every, H. A., Zhou, F., Forsyth, M. and MacFarlane, D. R. 1998, Lithium ion mobility in poly(vinyl alcohol) based polymer electrolytes as determined by 7Li NMR spectroscopy, Electrochimica acta, vol. 43, no. 10-11, pp. 1465-1469.

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Title Lithium ion mobility in poly(vinyl alcohol) based polymer electrolytes as determined by 7Li NMR spectroscopy
Formatted title Lithium ion mobility in poly(vinyl alcohol) based polymer electrolytes as determined by 7Li NMR spectroscopy
Author(s) Every, H. A.
Zhou, F.
Forsyth, M.
MacFarlane, D. R.
Journal name Electrochimica acta
Volume number 43
Issue number 10-11
Start page 1465
End page 1469
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 1998-04
ISSN 0013-4686
1873-3859
Keyword(s) poly(vinyl alcohol)
conductivity
7Li NMR
electrolytes
Summary Solvent-free polymer electrolytes based on poly(vinyl alcohol) (PVA) and LiCF3SO3 have shown relatively high conductivities (10−8-10−4 S cm−1), with Arrhenius temperature dependence below the differential scanning calorimeter (DSC) glass transition temperature (343 K). This behaviour is in stark contrast to traditional polymer electrolytes in which the conductivity reflects VTF behaviour. 7Li nuclear magnetic resonance (NMR) spectroscopy has been employed to develop a better understanding of the conduction mechanism. Variable temperature NMR has indicated that, unlike traditional polymer electrolytes where the linewidth reaches a rigid lattice limit near Tg, the lithium linewidths show an exponential decrease with increasing temperature between 260 and 360 K. The rigid lattice limit appears to be below 260 K. Consequently, the mechanism for ion conduction appears to be decoupled from the main segmental motions of the PVA. Possible mechanisms include ion hopping, proton conduction or ionic motion assisted by secondary polymer relaxations.
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 ©1998, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030113

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