Please use this identifier to cite or link to this item:

TitleDi-urea cross-linked poly(oxyethylene)/siloxane ormolytes for lithium batteries
Author(s)Nunes, Sílvia
Zea Bermudez, V. de
Ostrovskii, David
Silva, Maria Manuela
Barros, Sandra Cerqueira
Smith, Michael John
Carlos, Luís
Rocha, João
Morales, Enrique
KeywordsSol-gel synthesis
Ionic conductivity
Thermal analysis
Solid polymer electrolytes
Issue date2005
PublisherElectrochemical Society
JournalJournal of the Electrochemical Society
Citation"Journal of the electrochemical society". 152 (2005) 429-438.
Abstract(s)Poly(oxyethylene)( POE)/siloxane hybrids (di-ureasils) doped with a wide concentration range of lithium triflate were investigated. The host matrix of these materials (d-U(2000)) is a sol-gel derived siliceous network to which POE chains with about 40 repeat units are bonded through urea linkages. Xerogels with n between 500 and 5 (where n is the molar ration of OCH2CH2 repeat units to lithium íons) were obtained as amorphous monoliths thermally stable up to at least 340ºC. A crystalline POE/LiCF3SO3 complex was detected spectroscopically in samples with compositions of n less than 10. Below 90ºC the ormolyte with n = 20 exhibits the highest ionic conductivity of the series characterized. The redox stability of this material is about 4.1 volts.
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

Files in This Item:
File Description SizeFormat 
JELSoc.pdfMain article with figures1,12 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID