Synthesis, Structure and Ionic Conductivity of La2/3-xLi3xMoO4
来源期刊：JOURNAL OF RARE EARTHS2003年第4期
论文作者：苏锵 王海霞 任引哲 蒋凯 任玉芳 郭崇峰 孟健
Key words：inorganic material chemistry; rare earth molybdate; lithium ion conductor; ionic conduction; rare earths;
Abstract: A series of compounds, La2/3-xLi3xMoO4, were first prepared. Their structures are tetragonal scheelites with the cationic defects. The cell parameters a, c and values of c/a decrease with the increasing of the substitution amount (3x) of lithium ion. Cationic vacancies are getting more as Li+ concentration is lower. The diffusion of lithium ion is predominant. The concentration of charge carriers increases with increasing the substitution amount (3x) of lithium ion, meanwhile, the concentration of cationic vacancies decreases. The conductivity approaches the best when the substitution amount (3x) of lithium ion is about 0.3. The conductivity of La0.567Li0.3MoO4 is 6.5×10-6 S*cm-1 at room temperature.
苏锵1，王海霞2，任引哲2，蒋凯2，任玉芳1，郭崇峰2，孟健1
(1.The Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.College of Chemistry & Environmental Science, Henan Normal University, Xinxiang 453002, China;
3.Department of Chemistry, Shanxi Normal University, Linfen 041004, China)
Abstract:A series of compounds, La2/3-xLi3xMoO4, were first prepared. Their structures are tetragonal scheelites with the cationic defects. The cell parameters a, c and values of c/a decrease with the increasing of the substitution amount (3x) of lithium ion. Cationic vacancies are getting more as Li+ concentration is lower. The diffusion of lithium ion is predominant. The concentration of charge carriers increases with increasing the substitution amount (3x) of lithium ion, meanwhile, the concentration of cationic vacancies decreases. The conductivity approaches the best when the substitution amount (3x) of lithium ion is about 0.3. The conductivity of La0.567Li0.3MoO4 is 6.5×10-6 S*cm-1 at room temperature.
Key words:inorganic material chemistry; rare earth molybdate; lithium ion conductor; ionic conduction; rare earths;
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