Ionic conductivity and electrochemical stability of poly[oligo(ethylene glycol)oxalate]-lithium salt complexes

Authors
Xu, W Belieres, JP Angell, CA
Citation
W. Xu et al., Ionic conductivity and electrochemical stability of poly[oligo(ethylene glycol)oxalate]-lithium salt complexes, CHEM MATER, 13(2), 2001, pp. 575-580
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
CHEMISTRY OF MATERIALS
ISSN journal
08974756 → ACNP
Volume
13
Issue
2
Year of publication
2001
Pages
575 - 580
Database
ISI
SICI code
0897-4756(200102)13:2<575:ICAESO>2.0.ZU;2-B
Abstract
A new series of highly conducting polymer electrolytes based on poly[oligo( ethylene glycol)oxalate], P(EG(n)O) where n represents the number of repeat ing ethyleneoxy unit, has been prepared. The dielectric constant of the pol ymer host is higher than that of the pure poly(ethylene oxide) due to the e xistence of the two carbonyl groups in the repeating unit. A maximum conduc tivity of 5.9 x 10(-5) S cm(-1) at 25 degreesC was obtained for the complex of LiTFSI and P(EG(23)O) with a molar salt concentration of [Li+]/[EO] = 1 :16. The complexes also show good electrochemical stability up to 4.4 V ver sus Li+/Li.