New crosslinking agent as a Lewis acid for solid polymer electrolytes

• Published in: Journal of power sources Vol. 174; no. 2; pp. 603 - 606
• Main Authors: Lee, Jun Young, Ko, Dong-Hyun, Lee, Yong Min, Seol, Wan-Ho, Park, Jung-Ki
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 06.12.2007; Elsevier Sequoia
• Subjects: Anion receptor; Applied sciences; Crosslinking agent; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Ionic conductivity; Solid polymer electrolyte; Transference number; Crosslinking agent; Solid polymer electrolyte; Ionic conductivity; Anion receptor; Transference number; Lewis acid; Stability; Polymer solid electrolyte; Crosslinking; Secondary cell; Lithium battery; Plasticizer; Acrylate polymer
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2007.06.119

Poly(ethylene glycol) borate acrylate (PEGBA) was synthesized as a new crosslinking agent for solid polymer electrolyte (SPE) based on non-woven matrix. It has not only three crosslinkable acrylate groups for higher crosslinking density, but also Lewis acid center acting as an anion receptor. The ionic conductivity of SPE containing 15 wt.% PEGBA reached 5.5 × 10 −4 S cm −1, because the content of non-volatile plasticizer, poly(ethylene glycol) dimethyl ether (PEGDME), could be increased to 85 wt.% without leakage. In addition, its transference number and electrochemical stability were also enhanced to 0.37 and 5.2 V, respectively, due to the presence of Lewis acid center in PEGBA.