Design, synthesis and characterization of polysiloxane and polyetherdiamine based comb-shaped hybrid solid polymer electrolytes for applications in electrochemical devices

Juti Rani Deka, Diganta Saikia, Gwo Wei Lou, Chien Hua Lin, Jason Fang, Yung Chin Yang, Hsien Ming Kao

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

In this study, polysiloxane and polyetherdiamine based comb-shaped solid polymer electrolytes (SPEs) are developed by hydrosilylation and sol-gel reactions of polymethylhydrosiloxane, allyltriethoxysilane, bis(2-aminopropyl) polypropylene glycol-block-polyethylene glycol-block-polypropylene glycol and (3-glycidoxypropyl)trimethoxysilane followed by LiClO4 doping. The absence of residual Si‒H functionality in FTIR and 29Si CPMAS NMR spectra confirms the completion of hydrosilylation reaction. The formation of comb-shaped SPEs with silicate backbones is confirmed by 13C and 29Si solid-state NMR spectroscopy. The maximum ionic conductivity value of 5.8 × 10−4 S cm−1 is obtained for the SPE with [O]/[Li] ratio of 16 at 80 °C with electrochemical stability window reaching up to 4.8 V. The fabricated electrochromic device with the hybrid SPE of [O]/[Li] = 16 demonstrates good electrochromic contrast and optical density change values of 49.3% and 0.39, respectively, at wavelength of 550 nm. The results show that the present comb-shaped SPEs have potential to be used in various electrochemical devices.

Original languageEnglish
Pages (from-to)72-81
Number of pages10
JournalMaterials Research Bulletin
Volume109
DOIs
StatePublished - Jan 2019

Keywords

  • Electrochromic devices
  • Hydrosilylation
  • Ionic conductivity
  • Polysiloxane
  • Solid polymer electrolytes

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