Study on the cycling performances of lithium-ion polymer cells containing polymerizable additives

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Abstract

Gel polymer electrolytes were prepared by immersing a porous poly(vinylidene fluoride-co-hexafluoropropylene) membrane in an electrolyte solution containing small amounts of polymerizable additive (3,4-ethylenedioxythiophene, thiophene, biphenyl). The organic additives were electrochemically oxidized to form conductive polymer films on the electrode at high potential. With the gel polymer electrolytes containing different organic additive, lithium-ion polymer cells composed of carbon anode and LiCoO2cathode were assembled and their cycling performances were evaluated. Adding small amounts of thiophene or 3,4-ethylenedioxythiophene to the gel polymer electrolyte was found to reduce the charge transfer resistance in the cell and it thus exhibited less capacity fading and better high rate performance.

Original languageEnglish
Pages (from-to)319-322
Number of pages4
JournalBulletin of the Korean Chemical Society
Volume30
Issue number2
DOIs
Publication statusPublished - 2009 Feb 20

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Keywords

  • Cycling performance
  • Electrochemical oxidation
  • Gel polymer electrolyte
  • Lithium-ion polymer cell
  • Polymerizable additive

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