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Persistent URL http://purl.org/net/epubs/work/1561
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Record Id 1561
Title Polymer dynamics in 3PEG-LiClO4-TiO2 nanocomposite polymer electrolytes
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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
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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