Ionic conduction in polyphosphazene containing oligo(oxyethylene) side chains with cyclic carbonate as terminal groups

✍ Scribed by Yuji Tada; Moriyuki Sato; Noboru Takeno; Akiyoshi Inubushi; Yoshifumi Nakacho; Kiyotaka Shigehara

• Book ID: 102939141
• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 531 KB
• Volume: 195
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1994.021950604

✦ Synopsis

Abstract

Novel comb‐type polyphosphazene derivatives with cyclic carbonate groups as the terminal function of oligo(oxyethylene) side chains [CEP] were prepared for the achievement of high ionic conductivity, when they were hybridized with LiCIO~4~, in accordance with increase of permittivity. The relative permittivity of CEP turned out to be extraordinarily high, i.e. 24,6, whereas that of a similar comb‐type polyphosphazene with methyl ether terminal function of side chains was less than 10 at 25°C. The [LiCIO~4~(5)/CEP (95 wt.‐%)] hybrid showed relatively high ionic conductivity of 7,3 · 10^−6^ at 25°C and 9,6 · 10^−5^ S · cm^−1^ at 60°C, respectively. From the observation of the temperature dependence of ionic conductivity at 10–60°C, it was revealed that the ionic conduction obeys the Vogel‐Tamman‐Fulcher and Williams‐Landel‐Ferry equations based on the free volume theory.