期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 6, 期 12, 页码 3548-3552出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee41728j
关键词
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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, Li-7 PFG NMR, Li-7 NMR relaxometry, X-ray diffraction, electron diffraction, and P-31 MAS NMR. The exceptionally high ionic conductivity of tetragonal LGPS of similar to 10(-2) S cm(-1) is traced back to nearly isotropic Li hopping processes in the bulk lattice of LGPS with E-A approximate to 0.22 eV.
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