Synthesis, Structural Characterization, and Lithium Ion Conductivity of the Lithium Thiophosphate Li2P2S6

被引：124

作者：

Dietrich, Christian ^{[1
]}

Weber, Dominik A. ^{[1
]}

Culver, Sean ^{[1
]}

Senyshyn, Anatoliy ^{[2
]}

Sedlmaier, Stefan J. ^{[3
,4
]}

Indris, Sylvio

Janek, Juergen ^{[1
,3
,4
]}

Zeier, Wolfgang G. ^{[1
]}

机构：

[1] Justus Liebig Univ Giessen, Inst Phys Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany

[2] Tech Univ Munich, Heinz Maier Leibnitz Zentrum, D-85748 Garching, Germany

[3] Karlsruhe Inst Technol, Inst Nanotechnol, BELLA Batteries & Electrochem Lab, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[4] Karlsruhe Inst Technol, Inst Appl Mat, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

INORGANIC CHEMISTRY | 2017年 / 56卷 / 11期

关键词：

CRYSTAL-STRUCTURE; SUPERIONIC CONDUCTOR; VIBRATIONAL-SPECTRA; PERFORMANCE; DEPENDENCE;

D O I：

10.1021/acs.inorgchem.7b00751

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Inspired by the ongoing search for new superionic lithium thiophosphates for use in solid-state batteries, we present the synthesis and structural characterization of Li2P2S6, a novel crystalline lithium thiophosphate. Whereas M2P2S6 with the different alkaline elements (M = Na, K, Rb, Cs) is known, the lithium counterpart has not been reported yet. Herein, we present a combination of synchrotron pair distribution function analysis and neutron powder diffraction to elucidate the crystal structure and possible Li+ diffusion pathways of Li2P2S6. Additionally, impedance spectroscopy is used to evaluate its ionic conductivity. We show that Li2P2S6 possesses P2S62- polyhedral units with edge-sharing PS4 tetrahedra and only one-dimensional diffusion pathways with localized Li-Li pairs, leading to a low ionic conductivity for lithium.

引用

页码：6681 / 6687

页数：7

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