Europhysics Letters (EPL) · 2001 · 71 citations · 23 references
Natural SciencesChemistryMaterials SciencePhysical ChemistryPolymer ChemistryPolymer MaterialsElectrolyte MaterialsIon Transport In ElectrolytesIonic PolymersPolymer Physical ChemistryPolymer StructureSolid ElectrolytesIon Conduction PathwaysIon-conducting PolymersIonic Conductivity In PolymersLithium Intercalation CompoundsLithium-ion ConductivityLocal StructurePolymer ElectrolytesSolid Polymer Electrolytes
The average local structure around Li cations in a polymer electrolyte, P(EO)7.5LiClO4, has been determined by neutron diffraction with Li isotope substitution. In this environment, the Li ions are predominantly coordinated by 4 ∼ 5 ether oxygens. The intermediate-range order is enhanced relative to the pure polymer by the expansion of the network on the addition of the salt. The excess volume introduced must play a key role in facilitating the lithium ion conduction.
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