Ionic conductivity of gel electrolyte based on polydiethylene glycol dimethacrylate and its copolymer

✍ Scribed by Xiaoguang Sun; Yunqing Lin; Xiabin Jing

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 234 KB
• Volume: 32
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(96)00016-x

✦ Synopsis

Gel electrolytes were prepared by thermal polymerization of diethylene glycol dimethacrylate (DIEGD) or its copolymer with methoxy polyethylene glycol monomethacrylate, molecular weight 400 (PEM,), at a molar ratio of 3/l in the presence of propylene carbonate (PC) and LiClO,. Conductivity was measured by impedance spectroscopy.

It was found that the conductivity data follow the Arrhenius equation in the homopolymer gel system, while the VTF equation holds true in the copolymer gel system. An increase in conductivity was observed in the copolymer gel system. However, whether in the homopolymer or in the copolymer gel system, a maximum ambient temperature conductivity was found at a salt concentration near 1.50 mol/l. Further, the activation energy values calculated from Arrhenius plots for the homopolymer gel system tended to reach a minimum value with increasing salt concentration. Copyright