期刊
SOLID STATE IONICS
卷 272, 期 -, 页码 1-8出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2014.12.005
关键词
Li0.34La0.55TiO3 Li-ion conductor; Thin film electrolytes; Li-ion blocking secondary phase; Pulsed laser deposition
资金
- Ministry of Industry of the Basque Country through the Etortek program untitled Energigune'13
The deposition of single phase Li3xLa2/3-xTiO3 (LLTO) thin films remains very challenging. The growth of the perovskite phase is in competition with the insulating La2Ti2O7 phase when prepared at high oxygen pressure by PLD. Nevertheless, we have achieved epitaxial growth of LLTO on different (001) oriented substrates such as LaAlO3, SrTiO3 and MgO despite a large lattice mismatch of up to +8.8%. We also determined the percentage of lithium excess in the target necessary to reach a maximum ionic conductivity. However, the presence of the blocking La2Ti2O7 phase strongly hinders the lithium ion migration and reduces the total conductivity compared to bulk properties. (C) 2014 Elsevier B.V. All rights reserved.
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