NMR and Raman studies of a novel fast-ion-conducting polymer-in-salt electrolyte based on LiCF3SO3 and PAN

Ferry, Anders, Edman, Ludvig, Forsyth, Maria, MacFarlane, Douglas R. and Sun, Jianzeng 2000, NMR and Raman studies of a novel fast-ion-conducting polymer-in-salt electrolyte based on LiCF3SO3 and PAN, Electrochimica acta, vol. 45, no. 8-9, pp. 1237-1242.

Attached Files
Name Description MIMEType Size Downloads

Title NMR and Raman studies of a novel fast-ion-conducting polymer-in-salt electrolyte based on LiCF3SO3 and PAN
Formatted title NMR and Raman studies of a novel fast-ion-conducting polymer-in-salt electrolyte based on LiCF3SO3 and PAN
Author(s) Ferry, Anders
Edman, Ludvig
Forsyth, Maria
MacFarlane, Douglas R.
Sun, Jianzeng
Journal name Electrochimica acta
Volume number 45
Issue number 8-9
Start page 1237
End page 1242
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 2000-01-03
ISSN 0013-4686
1873-3859
Keyword(s) polymer-in-salt electrolyte
lithium and proton NMR
FT-Raman spectroscopy
poly(acrylonitrile)
LiCF3SO3
Summary We report spectroscopic results from investigations of a novel solid polymeric fast-ion-conductor based on poly(acrylonitrile), (PAN, of repeat unit [CH2CH(CN)]n), and the salt LiCF3SO3 . From NMR studies of the temperature and concentration dependencies of 7Li- and lH-NMR linewidths, we conclude that significant ionic motion occurs at temperatures close to the glass transition temperature of these polymer-in-salt electrolytes, in accordance with a recent report on the ionic conductivity. In the dilute salt-in-polymer regime, however, ionic motion appears mainly to be confined to local salt-rich domains, as determined from the dramatic composition dependence of the ionic conductivity. FT-Raman spectroscopy is used to directly probe the local chemical anionic environment, as well as the Li+–PAN interaction. The characteristic δs(CF3) mode of the CF3SO3 anion at ~750–780 cm−l shows that the ionic substructure is highly complex. Notably, no spectroscopic evidence of free anions is found even at relatively salt-depleted compositions (e.g. N:Li~60–10:1). A strong Li+–PAN interaction is manifested as a pronounced shift of the characteristic polymer C=N stretching mode, found at ~2244 cm−l in pure PAN, to ~2275 cm−l for Li+-coordinated C=N moieties. Our proton-NMR data suggest that upon complexation of PAN with LiCF3 SO3, the glass transition occurs at progressively lower temperatures.
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 ©2000, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030115

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 36 times in TR Web of Science
Scopus Citation Count Cited 36 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 293 Abstract Views, 0 File Downloads  -  Detailed Statistics
Created: Fri, 10 Sep 2010, 15:08:43 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.