Amphiphilic solid polymer electrolytes

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

Amphiphilic graft copolymers consisting of methacrylate backbones carrying approximately 48 wt.% of ethylene oxide [(EO)(9) or (EO)(23)] side chains as ionophilic groups and fluorocarbon or hydrocarbon side chains as ionophobic groups were prepared. Solid polymer electrolytes based on the copolymers and lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) were characterized by DSC and the impedance spectroscopy. A maximum ion conductivity of 8 x 10(-5) S cm(-1) at 60 degreesC was found for a polymer electrolyte based on a copolymer having hydrocarbon side chains and (EO)(23) side chains, despite an EO content of only 50 wt.%. No (EO)(n) side chain crystallinity in the electrolytes was detected by calorimetry. The hydrocarbon side chains, on the other hand, were found to form a crystalline phase in the electrolytes. The melting of this phase was not reflected in the shape of the Arrhenius conductivity plot. This indicated that the segmental mobility in the ion conducting phase did not decrease as a result of the presence of the crystalline hydrocarbon phase.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Chemical Sciences

Keywords

  • Crystallization, Macromonomer polymerization, Graft copolymer, Phase separation, Lithium bis(trifluoromethylsulfonyl)imide, Solid polymer electrolyte
Original languageEnglish
Title of host publicationSolid State Ionics
PublisherElsevier
Pages325-332
Volume147
Publication statusPublished - 2002
Publication categoryResearch
Peer-reviewedYes
EventPolymer Electrolytes Symposium 2001 (PES2001) - Noorderwijkerhout, Netherlands
Duration: 2001 May 142001 May 16

Publication series

Name
Number3-4
Volume147
ISSN (Print)0167-2738
ISSN (Electronic)1872-7689

Conference

ConferencePolymer Electrolytes Symposium 2001 (PES2001)
CountryNetherlands
CityNoorderwijkerhout
Period2001/05/142001/05/16

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)