Amphiphilic polymer electrolytes consisting of PVC-g-POEM comb-like copolymer and LiCF3SO3

• Published in: Journal of polymer science. Part B, Polymer physics Vol. 47; no. 15; pp. 1443 - 1451
• Main Authors: Koh, Joo Hwan, Lee, Kyung Ju, Seo, Jin Ah, Kim, Jong Hak
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.08.2009; Wiley
• Subjects: Applied sciences; atom transfer radical polymerization (ATRP); Electrical, magnetic and optical properties; Exact sciences and technology; graft copolymers; lithium salt; metal-polymer complexes; Organic polymers; Physicochemistry of polymers; polymer electrolytes; Properties and characterization; polymer electrolytes; metal-polymer complexes; Graft copolymer; Atom transfer polymerization; graft copolymers; Temperature effect; Polymer solid electrolyte; atom transfer radical polymerization (ATRP); Grafting; Macromer; Ethylene oxide polymer; Polyvinyl chloride; Amphiphilic polymer; Electrical properties; lithium salt; Ionic conductivity; Ethylene oxide copolymer; Experimental study; Glass transition temperature; Morphology; Preparation; Vinyl chloride copolymer; Concentration effect; Lithium compound; Methacrylate copolymer
• ISSN: 0887-6266; 1099-0488
• DOI: 10.1002/polb.21745

An amphiphilic comb‐like copolymer consisting of a poly(vinyl chloride) (PVC) backbone and poly((oxyethylene)9 methacrylate) (POEM) side chains, PVC‐graft‐POEM was synthesized via atom transfer radical polymerization. This comb copolymer was complexed with LiCF3SO3 to form a solid polymer electrolyte. FTIR and FT‐Raman spectroscopy indicate that lithium salts are dissolved in the ion conducting POEM domains of microphase‐separated graft copolymer up to 10 wt % of salt concentration. Microphase‐separated structure of the materials and the selective interaction of lithium ions with POEM domains were revealed by transmission electron microscopy, wide angle X‐ray scattering, and differential scanning calorimetry. The maximum ionic conductivity of 4.4 × 10−5 S/cm at room temperature was achieved at 10 wt % of salt concentration, above which salts are present as less mobile species such as ion pairs and higher order ionic aggregates, as characterized by FT‐Raman spectroscopy. © 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 1443–1451, 2009