Alternating copolymers of carbon dioxide with glycidyl ethers for novel ion-conductive polymer electrolytes

✍ Scribed by Yoichi Tominaga; Tomoki Shimomura; Mizuki Nakamura

• Book ID: 104088397
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 291 KB
• Volume: 51
• Category: Article
• ISSN: 0032-3861
• DOI: 10.1016/j.polymer.2010.07.037

✦ Synopsis

To overcome the low ionic conduction of existing poly(ethylene oxide)-based polymer electrolytes, we consider polycarbonates obtained from the copolymerization of CO 2 and epoxy monomers. We synthesized four types of polycarbonates possessing phenyl, n-butyl, t-butyl and methoxyethyl side groups using zinc glutarate, and measured the ionic conductivity of their electrolytes, including 10 mol% of LiTFSI. The electrolyte possessing methoxyethyl side groups had the highest conductivity, of the order of 10 À6 S cm À1 at room temperature. The activation energy (E a ) for ionic conduction in the polycarbonate electrolytes was estimated from the VTF equation, and the E a of the electrolyte possessing n-butyl side groups was almost the same with the polyether-based electrolytes. An interesting feature of our study is that the polycarbonate is a unique candidate for ion-conductive polymers because of its flexible and hydrophobic properties.