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Amphiphilic polymer gel electrolytes. II. Influence of the ethylene oxide side-chain length on the gel properties

In English

Författare

  • Patrik Gavelin
  • Denis Ostrovskii
  • Josefina Adebahr
  • Patric Jannasch
  • Bengt Wesslén

Summary, in English

Amphiphilic polymers consisting of copolymethacrylates carrying about 26 wt % ethylene oxide [(EO)(n)] side chains of different lengths were used as matrices in gel electrolytes. The gel electrolytes were composed of 30 wt % copolymer and 70 wt % 1 M LiPF6 in a mixture of ethylene carbonate and gamma -butyrolactone (2/1 w/w). The coordination of lithium ions by the (EO)(n) side chains in competition with the solvent was studied by Raman spectroscopy. A significantly stronger lithium coordination was observed when the gel electrolyte was based on a copolymer carrying (EO)(9) units in comparison with copolymers having (EO)(1), (EO)(2), and (EO)(4) units. Despite the observed stronger lithium coordination by (EO)(9) units in the gel, the ion conductivity was not significantly lower with respect to the gels based on the other copolymers.

Publiceringsår

2001

Språk

Engelska

Sidor

1519-1524

Publikation/Tidskrift/Serie

Journal of Polymer Science. Part B, Polymer Physics

Volym

39

Issue

13

Dokumenttyp

Artikel i tidskrift

Förlag

John Wiley & Sons Inc.

Ämne

  • Chemical Sciences

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0887-6266