UV-Cured Poly(Siloxane-Urethane)-Based Polymer Composite Materials for Lithium Ion Batteries—The Effect of Modification with Ionic Liquids

The results of studies on the synthesis and characterization of conductive polymer composite materials designed as potential separators for lithium ion batteries are presented. The conductive polymer composites were prepared from UV-cured poly(siloxane-urethanes)s (PSURs) containing poly(ethylene ox...

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Bibliographic Details
Published in:Materials 2020-11, Vol.13 (21), p.4978
Main Authors: Kozakiewicz, Janusz, Przybylski, Jarosław, Hamankiewicz, Bartosz, Sylwestrzak, Krystyna, Trzaskowska, Joanna, Krajewski, Michal, Ratyński, Maciej, Sarna, Witold, Czerwiński, Andrzej
Format: Article
Language:English
Subjects:
Chemical synthesis
Composite materials
Conducting polymers
Curing
Electrolytes
Ethylene oxide
Flammability
Ionic liquids
Ions
Lithium
Lithium-ion batteries
Mechanical properties
Molecular weight
Morphology
Polyethylene oxide
Polymer matrix composites
Polymerization
Polymers
Prepolymers
Rechargeable batteries
Separators
Siloxanes
Solid phases
Solvents
Ultraviolet radiation
Urethanes
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Summary:The results of studies on the synthesis and characterization of conductive polymer composite materials designed as potential separators for lithium ion batteries are presented. The conductive polymer composites were prepared from UV-cured poly(siloxane-urethanes)s (PSURs) containing poly(ethylene oxide) (PEO) segments and modified with lithium salts and ionic liquids (ILs). The most encouraging results in terms of specific conductivity and mechanical properties of the composite were obtained when part of UV-curable PSUR prepolymer was replaced with a reactive UV-curable IL. Morphology of the composites modified with ILs or containing a standard ethylene carbonate/dimethyl carbonate mixture (EC/DMC) as solvent was compared. It was found that the composites showed a two-phase structure that did not change when non-reactive ILs were applied instead of EC/DMC but was much affected when reactive UV-curable ILs were used. The selected IL-modified UV-cured PSUR composite that did not contain flammable EC/DMC solvent was preliminarily tested as gel polymer electrolyte and separator for lithium ion batteries.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13214978