New highly conductive organic-inorganic hybrid electrolytes based on star-branched silica based architectures

Diganta Saikia, Hao Yiang Wu, Chi Pin Lin, Yu Chi Pan, Jason Fang, Li Duan Tsai, George T.K. Fey, Hsien Ming Kao

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A new type of organic-inorganic hybrid electrolyte has been developed by a sol-gel process through the reaction of cyanuric chloride with poly(oxyalkylene) diamine and 3-isocyanatepropyltriethoxysilane, followed by co-condensation of 2-[methoxy(polyethyleneoxy)propyl]trimethoxysilane. A maximum ionic conductivity of 1.0 × 10-4 Scm-1 at 30°C has been achieved with the solid hybrid electrolyte. The results of solid-state NMR not only confirm the structural framework of the hybrids, but also provide a microscopic view of the effects of salt concentrations on the dynamic behavior of the polymer chains. The hybrid materials are blended with PVdF-HFP to form the blend hybrid membrane, followed by plasticization with various electrolyte solvents, with the purpose of increasing ionic conductivity. The plasticized blend hybrid electrolyte exhibits a maximum room temperature ionic conductivity of 8.8 × 10-3 Scm-1. Such a high ionic conductivity allows it as a potential candidate for applications in lithium ion batteries.

Original languageEnglish
Pages (from-to)6008-6020
Number of pages13
JournalPolymer
Volume53
Issue number26
DOIs
StatePublished - 7 Dec 2012

Keywords

  • Ionic conductivity
  • Organic-inorganic hybrid electrolyte
  • Poly(oxyalkylene) diamine

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