A Review of Perovskite Structure Solid State Lithium Ion Conductor
来源期刊：Journal of Rare Earths2006年第S2期
论文作者：张彬 陈刚 李鸿建
文章页码：132 - 138
摘 要：Perovskite structure （ABO3） solid state lithium ion conductor was reviewed. Up to date, the highest bulk lithium ion-conducting solid electrolyte is the perovskite-type lithium lanthanum titanate （LLTO） and related structure materials. Conductivity of LLTO at room temperature is comparable to that of commonly used polymer/liquid electrolytes. The reason for the high conductivity of LLTO is considered to be the big concentration of A-site vacancies, which benefits the 2D and 3D motion of lithium by a vacancy mechanism through the bottleneck between the A sites. The ionic conductivity of LLTO mainly depends on the size of the A-site ion cation, concentration of lithium and vacancy, and the nature of the B-O bond. Conductivity of LLTO can be increased by doping （e.g. A site, B site, A and B site, or O site）. But during fast lithium ion inserting, B-site cation can be reduced. So the appropriate properties of LLTO for possible application in all-solid-state batteries still remain a challenge. In this paper, the synthesis, structure, electrical conductivity, and electrochemical characterization of LLTO and its related materials were reviewed.
张彬，陈刚，李鸿建
摘 要：Perovskite structure （ABO3） solid state lithium ion conductor was reviewed. Up to date, the highest bulk lithium ion-conducting solid electrolyte is the perovskite-type lithium lanthanum titanate （LLTO） and related structure materials. Conductivity of LLTO at room temperature is comparable to that of commonly used polymer/liquid electrolytes. The reason for the high conductivity of LLTO is considered to be the big concentration of A-site vacancies, which benefits the 2D and 3D motion of lithium by a vacancy mechanism through the bottleneck between the A sites. The ionic conductivity of LLTO mainly depends on the size of the A-site ion cation, concentration of lithium and vacancy, and the nature of the B-O bond. Conductivity of LLTO can be increased by doping （e.g. A site, B site, A and B site, or O site）. But during fast lithium ion inserting, B-site cation can be reduced. So the appropriate properties of LLTO for possible application in all-solid-state batteries still remain a challenge. In this paper, the synthesis, structure, electrical conductivity, and electrochemical characterization of LLTO and its related materials were reviewed.
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