Lithium polymer cell assembled by in situ chemical cross-linking of ionic liquid electrolyte with phosphazene-based cross-linking agent

Ji Ae Choi, Yongku Kang, Dong Won Kim

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Ionic liquid-based cross-linked gel polymer electrolytes were prepared with a phosphazene-based cross-linking agent, and their electrochemical properties were investigated. Lithium polymer cells composed of lithium anode and LiCoO2 cathode were assembled with ionic liquid-based cross-linked gel polymer electrolyte and their cycling performance was evaluated. The interfacial adhesion between the electrodes and the electrolyte by in situ chemical cross-linking resulted in stable capacity retention of the cell. A reduction in the ionic mobility in both the electrolyte and the electrode adversely affected discharge capacity and high rate performance of the cell. DSC studies demonstrated that the use of ionic liquid-based cross-linked gel polymer electrolytes provided a significant improvement in the thermal stability of the cell.

Original languageEnglish
Pages (from-to)359-364
Number of pages6
JournalElectrochimica Acta
Volume89
DOIs
StatePublished - 2013 Feb 1

Keywords

  • Gel polymer electrolyte
  • In situ chemical cross-linking
  • Ionic liquid
  • Lithium polymer cell
  • Thermal stability

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