Effect of Branching on Rod−Coil Block Polyimides as Membrane Materials for Lithium Polymer Batteries

This paper describes a series of rod−coil block copolymers that produce easy-to-fabricate, dimensionally stable films with good ionic conductivity over a range of temperatures for use as electrolytes for lithium polymer batteries. The polymers consist of short, rigid rod polyimide segments alternati...

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Bibliographic Details
Published in:Chemistry of materials 2003-07, Vol.15 (15), p.3018-3025
Main Authors: Meador, Mary Ann B, Cubon, Valerie A, Scheiman, Daniel A, Bennett, William R
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:This paper describes a series of rod−coil block copolymers that produce easy-to-fabricate, dimensionally stable films with good ionic conductivity over a range of temperatures for use as electrolytes for lithium polymer batteries. The polymers consist of short, rigid rod polyimide segments alternating with flexible, polyalkylene oxide coil segments. An optimization study was carried out to examine the effects of four variables (degree of branching, formulated molecular weight, polymerization solvent, and lithium salt concentration) on ionic conductivity, glass transition temperature, and dimensional stability in this system.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm0301726