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TitlePreparation of hybrid organic-inorganic materials based on a di-ureasil matrix doped with lithium bis(trifluoromethanesulfonyl)imide
Author(s)Barbosa, P. C.
Rodrigues, L. C.
Silva, Maria Manuela
Smith, Michael John
Sol-gel process
Polymer electrolytes
Complex impedance spectroscopy
Issue dateJan-2008
JournalJournal of Power Sources
Citation"Journal of Power Sources". ISSN 0378-7753. 180:1 (2008) 607-611.
Abstract(s)In this presentation we describe the preparation of solvent-free solid polymer electrolytes (SPEs) by the sol-gel route with the incorporation of controlled quantities of lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) into the host matrix. The host framework of these xerogels, designated as di-ureasils and represented by d-U(900), contains oxyethylene oligomers with about 15 repeat units bonded at each end to a siliceous backbone through urea bridging links. Electrolytes were characterized by ionic conductivity measurements, cyclic voltammetry at a gold microelectrode and thermal analysis. The results obtained reveal that these hybrid materials are completely amorphous and exhibit appropriate electrochemical characteristics for a variety of applications.
Publisher version
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

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