Macroporous nanocomposite polymer electrolyte for lithium-ion batteries

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

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

A novel macroporous nanocomposite polymer membrane (NCPM) based on poly(vinylidene difluoride-co-hexafluoropropylene) [P(VDF-HFP)] copolymer was prepared by in situ hydrolysis of Ti(OC4H9)4 using a non-solvent-induced phase separation technique. SEM micrograph shows that the yielding TiO2 nanoparticles are dispersed uniformly in the polymer matrix and there are a lot of spherical macropores connecting with each other by some smaller pores. DSC results exhibit that the crystallinity of polymer matrix decreases with the incorporation of TiO2 nanoparticles. The tensile stress of the NCPM is 9.69 MPa and its fracture strain 74.4%. After immersion in 1.0 mol l-1 LiPF6/ethyl carbonate (EC)-dimethyl carbonate (DMC), the ionic conductivity of the obtained nanocomposite polymer electrolyte (NCPE) is 0.98 × 10-3 S cm-1 at 20 °C. Lithium-ion batteries, which use this kind of NCPE as the separator and electrolyte, display good discharging performance at different current densities, presenting promise for its practical application.

Original languageEnglish
Pages (from-to)562-565
Number of pages4
JournalJournal of Power Sources
Volume184
Issue number2
DOIs
StatePublished - 1 Oct 2008
Externally publishedYes

Keywords

  • Ionic conductivity
  • Lithium-ion battery
  • Macroporous polymer membrane
  • Nanocomposite polymer electrolyte
  • P(VDF-HFP)

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