Ionic conduction studies in P(VDF-HFP)-LiAsF6-(PC + DEC)-fumed SiO2composite gel polymer electrolyte system

✍ Scribed by Saikia, D. ;Kumar, A.

• Book ID: 105362907
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 378 KB
• Volume: 202
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200406922

✦ Synopsis

Abstract

In the present work, thin polymer electrolyte films of P(VDF–HFP) copolymer containing LiAsF~6~ salt dissolved in PC and DEC and fumed SiO~2~ submicron particles as dispersed phase prepared by solution casting technique are characterized by ac impedance measurements in the temperature range 303 K–373 K. Maximum ionic conductivity for P(VDF–HFP)–(PC + DEC)–LiAsF~6~–SiO~2~ fumed composite gel polymer electrolyte is found to be of the order of 10^–3^ S/cm at room temperature. XRD patterns show the increased amorphicity in the electrolytes. The degree of crystallinity is decreased from 30% in pure polymer to 17.7% in composite gel polymer electrolyte. Scanning electron micrographs show uniform dispersion of SiO~2~ particles and suggest that SiO~2~ supports formation of porous microstructures and increases the retaining capability of liquid electrolyte in the polymer gel network. FTIR spectral analyses confirm the polymer/salt/filler interaction. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)