Ionic conductivity and interfacial properties of polymer electrolytes based on PEO and boroxine ring polymer

• Published in: Journal of applied polymer science Vol. 84; no. 1; pp. 17 - 21
• Main Authors: Yang, Yunsong, Inoue, T., Fujinami, T., Mehta, M. A.
• Format: Journal Article
• Language: English
• Published: New York Wiley Subscription Services, Inc., A Wiley Company 04.04.2002; Wiley
• Subjects: Applied sciences; blends; conducting polymers; Electrical, magnetic and optical properties; Exact sciences and technology; interfaces; Organic polymers; Physicochemistry of polymers; Properties and characterization; Boron copolymer; Ethylene oxide polymer; Polymer blends; Electrical properties; Property composition relationship; Ionic conductivity; Heterocyclic copolymer; Temperature effect; Polymer solid electrolyte; Lithium compound; Ethylene oxide copolymer; Experimental study
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.10090

Blended polymer electrolytes based on poly(ethylene oxide) (PEO) and boroxine ring polymer (BP) solvated with lithium triflate were formulated and evaluated. Compared to PEO–salt polymer electrolyte, ionic conductivities of blended polymer electrolytes were two orders of magnitude higher in a low‐temperature range; as well, lithium transference numbers were increased to ∼ 0.4. These were due to the increased mobility and anion trapping of boroxine rings. BP also exhibited the stabilizing effect on lithium–polymer electrolyte interface, and a reduced interfacial resistance between lithium metal and the polymer electrolyte was found with increasing of BP content. Polymer electrolytes based on PEO and BP are suitable for use in lithium secondary battery. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 17–21, 2002; DOI 10.1002/app.10090