化学
锂(药物)
镧
离子电导率
离子半径
电导率
无机化学
碱金属
电解质
离子
钛酸锂
快离子导体
空位缺陷
钙钛矿(结构)
离子键合
碱土金属
放射化学
锂离子电池
结晶学
物理化学
电池(电)
有机化学
电极
内科学
功率(物理)
内分泌学
物理
医学
量子力学
作者
S. Stramare,Venkataraman Thangadurai,W. Weppner
出处
期刊:ChemInform
[Wiley]
日期:2003-12-30
卷期号:34 (52)
被引量:7
标识
DOI:10.1002/chin.200352244
摘要
To date, the highest bulk lithium ion-conducting solid electrolyte is the perovskite (ABO3)-type lithium lanthanum titanate (LLT) Li3xLa(2/3)-x□(1/3)-2xTiO3 (0 < x < 0.16) and its related structure materials. The x ≈ 0.1 member exhibits conductivity of 1 × 10-3 S/cm at room temperature with an activation energy of 0.40 eV. The conductivity is comparable to that of commonly used polymer/liquid electrolytes. The ionic conductivity of LLT mainly depends on the size of the A-site ion cation (e.g., La or rare earth, alkali or alkaline earth), lithium and vacancy concentration, and the nature of the B−O bond. For example, replacement of La by other rare earth elements with smaller ionic radii than that of La decreases the lithium ion conductivity, while partial substitution of La by Sr (larger ionic radii than that of La) slightly increases the lithium ion conductivity. The high lithium ion conductivity of LLT is considered to be due to the large concentration of A-site vacancies, and the motion of lithium by a...
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