Premium
Morphology, crystallinity, and electrochemical properties of in situ formed poly(ethylene oxide)/TiO 2 nanocomposite polymer electrolytes
Author(s) -
Liu Y.,
Lee Jim Y.,
Hong L.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12487
Subject(s) - materials science , crystallinity , nanocomposite , ionic conductivity , ethylene oxide , electrolyte , chemical engineering , differential scanning calorimetry , polymer , lithium (medication) , polymer chemistry , oxide , composite material , copolymer , chemistry , electrode , medicine , physics , engineering , thermodynamics , endocrinology , metallurgy
Abstract A method to produce nanocomposite polymer electrolytes consisting of poly(ethylene oxide) (PEO) as the polymer matrix, lithium tetrafluoroborate (LiBF 4 ) as the lithium salt, and TiO 2 as the inert ceramic filler is described. The ceramic filler, TiO 2 , was synthesized in situ by a sol–gel process. The morphology and crystallinity of the nanocomposite polymer electrolytes were examined by scanning electron microscopy and differential scanning calorimetry, respectively. The electrochemical properties of interest to battery applications, such as ionic conductivity, Li + transference number, and stability window were investigated. The room‐temperature ionic conductivity of these polymer electrolytes was an order of magnitude higher than that of the TiO 2 free sample. A high Li + transference number of 0.51 was recorded, and the nanocomposite electrolyte was found to be electrochemically stable up to 4.5 V versus Li + /Li. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2815–2822, 2003