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|Title:||Investigation of new ion-conducting ORMOLYTES : structure and properties|
Mello, Nilson C.
Bonagamba, Tito J.
Aegerter, Michel A.
|Year of Publication:||1997|
|OPUS Source:||Journal of sol-gel science and technology. - 8. 1997, S. 711-715|
|SWD key words:||Lithiumion|
|DDC notations:||620 Engineering and machine engineering|
|Publikation type:||Journal Article|
|Abstract:||Two families of hybrid organic-inorganic composites exhibiting Li+ ionic conduction (ORMOLYTES) have been prepared by the sol-gel process. The first family, prepared from a mixture of 3-isocyanatopropyltriethoxysilane, O,O''Bis (2-aminopropyl)-polyethyleneglycol (or O,O'Bis (2-aminopropyl)-polypropyleneglycol) and lithium salt, presents chemical bonds between the organic and the inorganic phase and an ionic conductivity σ higher than 10-4 S m-1 at room temperature. Their properties have been related to their structure using liquid state NMR measurements of 7Li between -100°C and +100'°C and the DMTA technique. In the second family, prepared by ultrasonic method from a mixture of tetraethoxysilane (TEOS), polyethyleneglycol (PEG) and lithium salt, the organic and inorganic phases are not chemically bonded. Ionic conductivity σ has been studied as a function of the polymer chain length and concentration. Values of σ up to 10-2S m-1 at room temperature have been obtained (with a silica-PEG300 system, PEG/TEOS=40% in weight). Again, structure was investigated by liquid state 7Li NMR measurements.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-24914|
|Date of registration:||4-Dec-2009|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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