离子电导率
材料科学
快离子导体
锂(药物)
电导率
扩散
活化能
离子键合
离子
电解质
导电体
化学物理
纳米技术
化学
物理化学
热力学
电极
物理
内分泌学
复合材料
有机化学
医学
作者
Yuki Kato,Satoshi Hori,Ryoji Kanno
标识
DOI:10.1002/aenm.202002153
摘要
Abstract Ever since the first report on Li 10 GeP 2 S 12 (LGPS) in 2011, its unique structure and exceptionally high lithium conductivity (>1 × 10 −2 S cm −1 ) have attracted extensive interest, especially for applications in solid‐state ionics and batteries. Herein, studies of LGPS and its modifications are reviewed with a focus on the synthesis, structure, and ionic transportation of LGPS. For material synthesis, the relationships between LGPS and its precursor compounds such as Li 3 PS 4 and Li 4 GeS 4 are discussed. A technique for single‐crystal growth and a family of LGPS‐type materials that are chemically or structurally related to LGPS are then described. The crystal structure of LGPS is analyzed from the viewpoints of tetrahedral framework units, anion sublattice, and Li distributions; furthermore, the conduction mechanism is qualitatively analyzed. Subsequently, ionic transportation in LGPS is studied quantitatively. The origin of the high conductivity is discussed in terms of the activation energy, diffusion coefficient, and its related parameters; and these factors are compared to those of other non‐LGPS‐type conductors. Then, the battery applications are briefly summarized to indicate the potential merits of using LGPS‐type solid electrolytes with high lithium conductivity. Any remaining issues and possible research directions that have emerged from the aforementioned studies are finally highlighted.
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