Please use this identifier to cite or link to this item: doi:10.22028/D291-24226
Title: New Li+ ion-conducting ormolytes
Author(s): Dahmouche, Karim
Atik, Mohamed
Bonagamba, Tito J.
Mello, Nilson C.
Panepucci, Horacio
Judeinstein, Patrick
Aegerter, Michel A.
Language: English
Year of Publication: 1998
OPUS Source: Solar energy materials & solar cells. - 54. 1998, S. 1-8
SWD key words: Ionenleitung
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: The preparation and characterization of two new families of lithium-conducting solid-state electrolytes is reported. Both systems are silica (SiO2) - polyethyleneglycol (PEGn) hybrid materials with (type I) or without (type II) covalent organic-inorganic chemical bonds. Their electrical conductivity has been studied by complex impedance spectroscopy between 20'°C and 100'°C in the frequency range 1 Hz to 10 MHz as a function of the polymer chain length (200 < n < 1900), polymer concentration and lithium concentration (4 < [O]/[Li] < 80). The highest room-temperature ionic conductivity (&sigma;&#8773; 6 x 10-2 S cm-1) has been found for type II material for ratios [O]/[Li] = 15 and PEG300/TEOS = 1.0. The effect of the chain length on the polymer mobility has been studied by nuclear magnetic resonance by measuring the Li+ line widths and the spin-lattice relaxation time T1 between -100'°C and + 100'°C, The bonded chain mobility increases with the chain length (type II) while the opposite occurs with unbonded chain material (type I). Both types of materials present high ionic conductivity at room temperature and are adequate as Li+-conducting electrolyte in all solid-state electrochemical devices.
Link to this record: urn:nbn:de:bsz:291-scidok-24499
Date of registration: 27-Nov-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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