Synthesis and Characterization of Nanostructured Fast Ionic Conductor Li0.30La0.56TiO3

• Published in: Chemistry of materials Vol. 18; no. 18; pp. 4385 - 4392
• Main Authors: Pham, Quoc Nghi, Bohnké, Claude, Crosnier-Lopez, Marie-Pierre, Bohnké, Odile
• Format: Journal Article
• Language: English
• Published: American Chemical Society 05.09.2006
• ISSN: 0897-4756; 1520-5002
• DOI: 10.1021/cm060605f

The preparation of a pure and nanostructured phase of the fast lithium conductor Li0.30La0.56TiO3 at low temperature (350 °C for 2 h) is reported for the first time. The synthesis has been carried out by the Pechini-type in-situ polymerizable method. It has been shown that the molar ratios ethylene glycol/citric acid and citric acid/metals, as well as the temperature, are crucial parameters during this synthesis. A careful control of the temperature during polyesterification allowed us to prepare the nanosized phase of oxide and to avoid the formation of thermally stable impurities. The crystallite size (20−30 nm) of the oxide has been determined by the analysis of the broadening of the powder X-ray diffraction lines. The particles size has been confirmed by transmission electron microscopy and the macroporous character of the powder has been evidenced by scanning electron microscopy.