期刊
CHEMISTRY OF MATERIALS
卷 24, 期 11, 页码 2211-2219出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm3011315
关键词
inorganic Li+ conductors; chalcogenidotetrelates; crystal structures; ion conductivity
资金
- Deutsche Forschungsgemeinschaft (DFG)
- Bundesministerium fur Bildung und Forschung (BMBF)
A new lithium chalcogenidotetrelate, denoted as LiChT phase, with the elemental combination Li/Sn/S was synthesized as solvent-free and solvent-containing salts. We present and discuss syntheses, crystal structures, spectroscopic and thermal properties of the phases, as well as the Li+ ion conductivity of Li4SnS4, which is formally related to the thio-LISICON parent system Li4GeS4, and thus represents the first member of a new thiostannate-LISICON family. The solvent-free title compound shows a very promising Li+ ion conductivity of 7 x 10(-5) S.cm(-1) at 20 degrees C and 3 x 10(-3) S.cm(-1) at 100 degrees C, which is exceptionally high for a ternary compound. Activation energies for the lithium ion transport measured via impedance spectroscopy (0.41 eV) correlate reasonably well with the values (0.29 to 0.33 eV) deduced from ionic mobility studies by Li-7 solid-state NMR spectroscopy. NMR two-time correlation functions suggest the occurrence of an additional, geometrically more restricted, ultra-slow-motional process down to 121 K.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据