Journal
SOLID STATE IONICS
Volume 176, Issue 31-34, Pages 2345-2348Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2005.05.018
Keywords
lithium ion conductor; perovskite; colloidal crystal templating; sol-gel; macroporous membrane
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Three dimensionally ordered macroporous Li+ ion conductive membranes of Li0.35La0.55TiO3 were prepared by a colloidal crystal templating method combined with sol-gel process. Colloidal crystal composed of monodisperse polystyrene particles (3 gm diameter) was utilized as a template. Sol of Li-La-Ti-O was prepared from lithium acetate, lanthanum acetate, and titanium tetraisopropoxide. The sol was injected into the template, and it was converted to gel. Polystyrene particles were removed by calcinations at high temperatures, and then macroporous Li0.35La0.55TiO3 was obtained. Li+ ion conductivity in the crystal grain part of Li0.35La0.55TiO3 annealed at 1000 degrees C was 2 x 10(-4) S cm(-1) at room temperature. (c) 2005 Elsevier B.V. All rights reserved.
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