四方晶系
离子
化学
离子电导率
快离子导体
松弛法
电解质
电导率
结晶学
分析化学(期刊)
化学物理
材料科学
晶体结构
物理化学
放射科
有机化学
磁共振成像
自旋回波
医学
色谱法
电极
作者
Alexander Kuhn,Viola Düppel,Bettina V. Lotsch
摘要
Tetragonal Li10GeP2S12 (LGPS) is the best solid Li electrolyte reported in the literature. In this study we present the first in-depth study on the structure and Li ion dynamics of this structure type. We prepared two different tetragonal LGPS samples, Li10GeP2S12 and the new compound Li7GePS8. The Li ion dynamics and the structure of these materials were characterized using a multitude of complementary techniques, including impedance spectroscopy, 7Li PFG NMR, 7Li NMR relaxometry, X-ray diffraction, electron diffraction, and 31P MAS NMR. The exceptionally high ionic conductivity of tetragonal LGPS of ∼10−2 S cm−1 is traced back to nearly isotropic Li hopping processes in the bulk lattice of LGPS with EA ≈ 0.22 eV.
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