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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/1561
Record Status
Checked
Record Id
1561
Title
Polymer dynamics in 3PEG-LiClO
4
-TiO
2
nanocomposite polymer electrolytes
Contributors
C Karlsson
,
A S Best
,
J Swenson
,
W S Howells
,
L Borjesson
Abstract
The microscopic polymer dynamics in nanocomposite polymer electrolytes has been investigated using quasielastic neutron scattering experiments. Four samples based on the fully amorphous copolymer trihydroxy poly(ethylene oxide-co-propylene oxide) (3PEG) were investigated: 3PEG, 3PEG 1.5 mol/kg LiClO4, 3PEG 1.5 mol/kg LiClO4 10 wt % TiO2, and 3PEG 1.5 mol/kg LiClO4 20 wt % TiO2. In addition to a slow relaxation giving rise to elastic scattering, at least two dynamical processes were observed: a fast, local chain motion and a slower diffusive segmental motion. No changes of the quasielastic peak widths could be observed between the filled or unfilled composites; however, the elastic scattering of the sample was found to increase upon addition of the filler to the polymer electrolyte. The results indicate the presence of a roughly 5-nm-thick immobilized polymer layer (~5 vol %) around filler particles, while the dynamics of the bulk polymer (~95 vol %) is not influenced by the filler. The results imply that the ionic conductivity increase observed in the nanocomposite polymer electrolyte cannot be attributed to enhanced polymer dynamics.
Organisation
CCLRC
,
ISIS
,
ISIS-IRIS
Keywords
Materials
,
ISIS 2003
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Phys Chem
118 (2003): 4206.
doi:10.1063/1.1540980
2003
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