Synthesis and characterization of a new hyperbranched organic-inorganic solid polymer electrolyte with cyanuric chloride as a core element

Yu Chi Pan, Diganta Saikia, Jason Fang, Li Duan Tsai, George T.K. Fey, Hsien Ming Kao

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A new hyperbranched organic-inorganic hybrid electrolyte based on the use of 2,4,6-trichloro-1,3,5-triazine (cyanuric chloride, CC) as the coupling core to couple with oligo(oxyalkylene)-amines, followed by condensation with (3-glycidoxypropyl)-trimethoxysilane (GLYMO) and complexed with LiClO 4, has been prepared and characterized. The Vogel-Tamman-Fulcher (VTF) like conductivity behavior is observed in the present organic-inorganic hybrid electrolytes with a maximum ionic conductivity value of 4.4 × 10-5 S cm-1 at 30 °C. Multinuclear NMR techniques are used to provide a microscopic view for the specific interaction between the polymer chains and Li+ cations and their dynamic behaviors. The results of 2D 1H-13C wide-line separation (WISE) and 7Li static line NMR width measurements divulge that the mobility of the 7Li cations is strongly related to a dynamic environment created by the polymer motion in the amorphous phase. The combined results of conductivity and 7Li pulse-gradient spin-echo (PGSE) NMR self-diffusion coefficient measurements reveal that the conductivity enhancement at low salt concentrations is mainly caused by the high mobility of the lithium cations.

Original languageEnglish
Pages (from-to)8519-8529
Number of pages11
JournalElectrochimica Acta
Volume56
Issue number24
DOIs
StatePublished - 1 Oct 2011

Keywords

  • Differential scanning calorimetry
  • Ionic conductivity
  • Organic-inorganic hybrid electrolyte
  • Solid-state NMR

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