Effects of the porous structure on conductivity of nanocomposite polymer electrolyte for lithium ion batteries

Z. H. Li, H. P. Zhang, P. Zhang, G. C. Li, Y. P. Wu, X. D. Zhou

Research output: Contribution to journalArticlepeer-review

114 Scopus citations

Abstract

A kind of porous nanocomposite polymer membranes (NCPMs) based on poly(vinylidene difluoride-co-hexafluoropropylene) (P(VdF-HFP)) incorporated with different amounts of TiO2 nanoparticles from in situ hydrolysis of Ti(OC4H9)4 was prepared by a non-solvent induced phase separation (NIPS) technology. The SEM micrographs reveal that a porous structure exists in the NCPMs, which changes with the incorporated amount of TiO2. The NCPMs incorporated with 9.0 wt.% of mass fraction of TiO2 possess the highest porosity, 67.3%, and appear as flexile fracture with an elongation ratio, 74.4%. At this content, the ionic conductivity of the NCPE is up to 0.94 × 10-3 S cm-1 at room temperature and the activation energy for ions transport reaches the lowest, 18.71 kJ mol-1. It is of great potential application in lithium ion batteries.

Original languageEnglish
Pages (from-to)416-422
Number of pages7
JournalJournal of Membrane Science
Volume322
Issue number2
DOIs
StatePublished - 15 Sep 2008
Externally publishedYes

Keywords

  • In situ hydrolysis
  • Ionic conductivity
  • Lithium ion battery
  • Polymer electrolyte
  • Porous polymer membrane

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