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https://hdl.handle.net/1822/1767| Título: | Di-urea cross-linked poly(oxyethylene)/siloxane ormolytes for lithium batteries |
| Autor(es): | Nunes, Sílvia Zea Bermudez, V. de Ostrovskii, David Silva, Maria Manuela Barros, Sandra Cerqueira Smith, Michael John Carlos, Luís Rocha, João Morales, Enrique |
| Palavras-chave: | Sol-gel synthesis Ionic conductivity Thermal analysis Solid polymer electrolytes |
| Data: | 2005 |
| Editora: | Electrochemical Society |
| Revista: | Journal of the Electrochemical Society |
| Citação: | "Journal of the electrochemical society". 152 (2005) 429-438. |
| Resumo(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. |
| Tipo: | Artigo |
| URI: | https://hdl.handle.net/1822/1767 |
| DOI: | 10.1149/1.1851051 |
| ISSN: | 0013-4651 |
| Arbitragem científica: | yes |
| Acesso: | Acesso aberto |
| Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
| Ficheiro | Descrição | Tamanho | Formato | |
|---|---|---|---|---|
| JELSoc.pdf | Main article with figures | 1,12 MB | Adobe PDF | Ver/Abrir |
