title: Ion-Conductive Properties of a Polymer Electrolyte Based on Ethylene Carbonate/Ethylene Oxide Random Copolymer.
abstract: A random copolymer of ethylene oxide with CO2, namely, poly(ethylene carbonate/ethylene oxide) (P(EC/EO)), has been synthesized as a novel candidate for polymer electrolytes. Electrolyte composed of P(EC/EO) and lithium bis(fluorosulfonyl)imide has an ionic conductivity of 0.48 mS cm-1and a Li transference number (t+) of 0.66 at 60 °C. To study ion-conductive behavior of P(EC/EO)-based electrolytes, the Fourier transform infrared (FT-IR) technique is used to analyze the interactions between Li+and functional groups of the copolymer. The carbonate groups may interact preferentially with Li+rather than the ether groups in P(EC/EO). This study suggests that copolymerization of carbonate and flexible ether units can realize both high conductivity and t+for polymer electrolytes. High-performance P(EC/EO) electrolyte is expected to be a candidate material for use in all-solid-state batteries.
authors.affiliation: Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo, 184-8588, Japan.|Research Center, Lintec Corporation, 7-7-3 Tsuji, Minami-ku, Saitama-shi, Saitama, 336-0026, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Morioka
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Nakano
authors.affiliation: Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Tominaga
mesh_terms: D002254:Carbonates / Q000737:chemistry; D004553:Electric Conductivity; D004573:Electrolytes / Q000737:chemistry*; D007094:Imides / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry; D015394:Molecular Structure; D008970:Molecular Weight; D009930:Organic Chemicals / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry*; D011095:Polyethylenes / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
chemical_list: D002254:Carbonates; D004573:Electrolytes; D007094:Imides; D007477:Ions; D009930:Organic Chemicals; D011095:Polyethylenes; D011108:Polymers; C039212:polyethylene carbonate; D011092:Polyethylene Glycols; D008094:Lithium
keywords: carbon dioxide; ethylene carbonate/ethylene oxide copolymer; ionic conductivity; lithium-ion batteries; polymer electrolytes