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Issue 4, 2003
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Lithium coordination and mobility in gel electrolytes based on an acrylate polymer with ethylene oxide side chains

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Abstract

Multinuclear NMR has been used to investigate the structure and mobility of a series of polymer gel electrolytes. The co-polymers used as matrixes in the gels have acrylate backbones and side chains of ethylene oxide, where the length of the side chains has been varied, while the ratio of acrylate to ethylene oxide has been kept constant. The electrolyte is a mixture of lithium perchlorate and two solvents, ethylene carbonate and gamma butyrolactone. 13C spectra of the different gel electrolytes shows that both solvents interact with the salt, and that the strength of the interaction increases with decreasing length of the polymer side chains. It also appears that the lithium ions show no selectivity between the two types of solvent. Furthermore, the lithium chemical shift moves progressively upfield with increasing length of the side chains, showing a gradual change in interaction from lithium–solvent to lithium–(ethylene oxide).

Graphical abstract: Lithium coordination and mobility in gel electrolytes based on an acrylate polymer with ethylene oxide side chains

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Publication details

The article was received on 28 Aug 2002, accepted on 24 Jan 2003 and first published on 18 Feb 2003


Article type: Paper
DOI: 10.1039/B208354J
Citation: J. Mater. Chem., 2003,13, 814-817
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    Lithium coordination and mobility in gel electrolytes based on an acrylate polymer with ethylene oxide side chains

    J. Adebahr, M. Forsyth, D. R. MacFarlane, P. Gavelin and P. Jacobsson, J. Mater. Chem., 2003, 13, 814
    DOI: 10.1039/B208354J

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