LiSbO2: Synthesis, Structure, Stability, and Lithium-Ion Conductivity
详细信息 查看全文
- 作者：Benjamin P. de Laune ; Ryan D. Bayliss ; Colin Greaves
- 刊名：Inorganic Chemistry
- 出版年：2011
- 出版时间：August 15, 2011
- 年：2011
- 卷：50
- 期：16
- 页码：7880-7885
- 全文大小：879K
- 年卷期：v.50,no.16(August 15, 2011)
- ISSN：1520-510X
文摘
LiSbO2 has been synthesized using a ceramic method involving evacuated quartz tubes to ensure stoichiometry. Its structure [monoclinic, P21/c; a = 4.8550(3) 脜, b = 17.857(1) 脜, c = 5.5771(3) 脜; 尾 = 90.061(6)掳] has been determined using X-ray and neutron diffraction and refined on the basis of neutron data. The structure is significantly different from that of LiBiO2 and contains chains of corner-linked SbO3 trigonal pyramids, which provide a framework for the tetrahedral coordination of Li+ ions. A layer structure results in which the Li sites are located in planes perpendicular to [010]. LiSbO2 is stable in air up to ca. 400 掳C, but at higher temperatures, oxidation to LiSbO3 occurs as a two-stage process, with evidence for a metastable, intermediate LiSbO2.5 phase presented. The Li+-ion conductivity, measured using alternating-current impedance spectroscopy, is similar to that of LiBiO2, with a value of ca. 10鈥? S cm鈭? at 300 掳C.