Journal article

Publication year: 2017

Pages: 6681-6687

Journal: Inorganic Chemistry

Volume number: 56

Issue number: 11

ISSN: 0020-1669

DOI Link: https://doi.org/10.1021/acs.inorgchem.7b00751

Publisher: American Chemical Society

Abstract: 
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.

Harvard Citation style: Dietrich, C., Weber, D., Culver, S., Senyshyn, A., Sedlmaier, S., Indris, S., et al. (2017) Synthesis, Structural Characterization, and Lithium Ion Conductivity of the Lithium Thiophosphate Li2P2S6, Inorganic Chemistry, 56(11), pp. 6681-6687. https://doi.org/10.1021/acs.inorgchem.7b00751

APA Citation style: Dietrich, C., Weber, D., Culver, S., Senyshyn, A., Sedlmaier, S., Indris, S., Janek, J., & Zeier, W. (2017). Synthesis, Structural Characterization, and Lithium Ion Conductivity of the Lithium Thiophosphate Li2P2S6. Inorganic Chemistry. 56(11), 6681-6687. https://doi.org/10.1021/acs.inorgchem.7b00751