Proton-conductive membranes based on CsH2PO4 and ultra-dispersed polytetrafluoroethylene

Irina N. Bagryantseva, Valentina G. Ponomareva, Natalia P. Lazareva

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Proton conductivity, structural and morphological characteristics of new polymer containing composite membranes based on CsH2PO4 and ultra-dispersed polytetrafluoroethylene (UPTFE) have been investigated. Optimization of the preparation method of membranes was carried out. The CsH2PO4 (P2(1)/m) phase was shown to persist in the UPTFE polymer matrix in a whole range of compositions. The proton conductivity of (1 - x)CsH2PO4 - xUPTFE (x = 0.035-0.3 x-weight fraction) electrolytes with various composition was studied as a function of temperature and partial pressure of water vapor. The conductivity values were close to the pure CsH2PO4 at x <0.1. With x increase the conductivity decreased due to the "conductor-insulator" percolation effect within one order of magnitude. The unit cell parameters of CsH2PO4 in polymer matrix were calculated and microstructure of electrolytes was studied.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalSolid State Ionics
Volume329
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Acid salt
  • Cesium dihydrogen phosphate
  • Composite polymer electrolyte
  • Polytetrafluoroethylene
  • Proton conductivity
  • CRYSTAL-STRUCTURE
  • CESIUM DIHYDROGEN PHOSPHATE
  • SUPERPROTONIC CONDUCTIVITY
  • SALTS
  • COMPOSITE ELECTROLYTES
  • DIFFRACTION
  • SILICA
  • HIGH-TEMPERATURE BEHAVIOR

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