CONDUCTIVITY STUDIES OF POLYMER ELECTROLYTES BASED ON ALIPHATIC POLYESTERS

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A series of aliphatic polyesters of sebacoyl chloride and poly(ethylene glycol) containing a different number of ethylene oxide groups was synthesized and characterized. These polyesters were complexed with lithium perchlorate to obtain a new class of polymer electrolyte. The relationships between the structure and properties of these polymer electrolytes were investigated. The main factor that affects the ionic conductivity in these systems was found to be the solvating capacity of the polyester for the lithium salt. These polymer electrolytes showed ionic conductivities up to 10(-5) similar to 10(-4) S/cm at 25 degrees C. The mechanical strength was improved by cross-linking, and the cross-linked polyester complexed with a LiClO4 salt showed an ionic conductivity of 2 X 10(-5) S/cm at room temperature. Li-7 NMR spin-spin relaxation and dielectric relaxation studies were also carried out to investigate the local environments and dynamics of ions in the polymer electrolytes. (C) 1995 John Wiley and Sons, Inc.
Publisher
JOHN WILEY SONS INC
Issue Date
1995-07
Language
English
Article Type
Article
Keywords

IONIC-CONDUCTIVITY; POLY(PROPYLENE OXIDE); POLY(ETHYLENE OXIDE); LITHIUM PERCHLORATE; COMPLEXES; RELAXATION; SALTS; TRANSPORT

Citation

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v.33, no.9, pp.1323 - 1331

ISSN
0887-6266
URI
http://hdl.handle.net/10203/70222
Appears in Collection
CBE-Journal Papers(저널논문)
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