Study of ion-molecule interaction in poly(methylmethacrylate) based gel electrolytes by raman spectroscopy

✍ Scribed by E. Cazzanelli; G. Mariotto; G.B. Appetecchi; F. Croce; B. Scrosati

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 393 KB
• Volume: 40
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(95)00198-n

✦ Synopsis

Abstract4el

electrolytes based on polymethymetacrylate (PMMA) have been obtained using propylene carbonate and ethylene carbonate as gelating agents. They have a good mechanical stability, solvent retention and high electrical conductivity at room temperature (about 10e3 Sem-'). In the aim of understanding the possible interactions of the mobile ions with polymer or solvent molecules, a comparative Raman study has been carried out on samples containing all the components of the gel electrolytes or some of them. The interaction with Li+ ions induces appreciable modifications of the vibrational spectra of the solvent molecules; two new bands appear at 9OOcm-' and 730cm-', slightly upshifted with respect to the stretching and bending modes of the ethylene carbonate ring. The change in size and polarizability of the anion species does not affect such cation-solvent interaction.