✦ LIBER ✦

An nmr investigation of ionic structure and mobility in plasticized solid polymer electrolytes

✍ Scribed by M. Forsyth; D.R. MacFarlane; P. Meakin; M.E. Smith; T.J. Bastow

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 479 KB
Volume: 40
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(95)00190-p

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✦ Synopsis

Ahstract--23Na and r9F nuclear magnetic resonance spectroscopy is used to investigate the effect of plasticizer addition on ionic structure and mobility in a urethane crosslinked polyether solid polymer electrolyte. The incorporation of dimethyl formamide and propylene carbonate plasticizers in a sodium triflate/polyether system results in an upfield chemical shift for the "Na resonance consistent with decreased anion-cation association and increased cation-plasticizer interactions. The r9F resonances appears less susceptible to changes in chemical environment with only minor chemical shift changes recorded. Spin lattice relaxation measurements for the 19F nucleus are also reported. Two minima are observed in the relaxation measurements consistent with both an inter and intramolecular relaxation mechanism.

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