File(s) under permanent embargo

Enhancement of ion dynamics in PMMA-based gels with addition of TiO2 nano-particles

journal contribution
posted on 30.06.2003, 00:00 authored by J Adebahr, Nolene ByrneNolene Byrne, Maria ForsythMaria Forsyth, D MacFarlane, P Jacobsson
Solvent and ion dynamics in PMMA based gels have been investigated as a function of the loading of nanosized TiO2 particles. The gels have a molar ratio of 46.5:19:4.5:30 of ethylene carbonate (EC), propylene carbonate (PC), lithium perchlorate and PMMA, respectively. A series of samples with 0, 4, 6 and 8 wt.% TiO2 filler were investigated. The diffusion coefficients for the lithium ions and for the two solvents (EC and PC) were investigated by pfg-NMR. It was shown that the addition of filler to the gel electrolytes enhances the diffusion of the cations, while the diffusion of the solvents remains constant. Raman measurements show no significant changes in ion–ion interactions with the addition of fillers, while the ionic conductivity is seen to decrease. However, the sample with 8 wt.% TiO2 had a conductivity close to that of the unfilled sample.

History

Journal

Electrochimica acta

Volume

48

Issue

14-16

Pagination

2099 - 2103

Publisher

Elsevier Science Pub. Co.

Location

New York, N.Y.

ISSN

0013-4686

eISSN

1873-3859

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2003, Elsevier Science Ltd.