Anion receptor-coated separator for lithium-ion polymer battery

Je An Lee, Jun Young Lee, Myung Hyun Ryou, Gi Beom Han, Je Nam Lee, Dong Jin Lee, Jung Ki Park, Yong Min Lee

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Anion receptor-coated separators were prepared by coating poly(ethylene glycol) borate ester (PEGB) as an anion receptor and poly(vinyl acetate) (PVAc) as a good adhesive material towards electrodes onto microporous polyethylene (PE) separators. Gel polymer electrolytes were fabricated by soaking them in an liquid electrolyte, 1 M LiPF 6 in EC/DEC/PC (30/65/5, wt.%). As the weight ratio of PEGB to PVAc in a coating layer increased, gel polymer electrolytes showed higher cationic conductivity and electrochemical stability. The cationic conductivity and electrochemical stability of the gel polymer electrolyte based on coated separator with PVAc/PEGB (2/5, weight ratio) could reach 2.8×10 -4 S cm -1 and 4.8 V, respectively. Lithium-ion polymer cells (LiCoO 2/graphite) based on gel polymer electrolytes with and without PEGB were assembled, and their electrochemical performances were evaluated.

Original languageEnglish
Pages (from-to)753-757
Number of pages5
JournalJournal of Solid State Electrochemistry
Volume15
Issue number4
DOIs
StatePublished - Apr 2011

Bibliographical note

Funding Information:
This work was supported by the IT R&D program of MKE/IITA (Core Lithium Secondary Battery Anode Materials for Next Generation Mobile Power Module, 2008-F-019-01)

Keywords

  • Anion receptor
  • Coated separator
  • Gel polymer electrolyte
  • Lithium-ion polymer battery
  • PEG-borate ester

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