Journal article

Publication year: 2021

Pages: 18975-18980

Journal: Inorganic Chemistry

Volume number: 60

Issue number: 24

ISSN: 0020-1669

eISSN: 1520-510X

DOI Link: https://doi.org/10.1021/acs.inorgchem.1c02813

Publisher: American Chemical Society

Abstract: 
The lithium argyrodites Li6PS5X (X = Cl, Br, and I) have attracted interest as fast solid ionic conductors for solid-state batteries. Within this class of materials, it has been previously suggested that more polarizable anions and larger substituents should influence the ionic conductivity (e.g., substituting S by Se). Building upon this work, we explore the influence of Sn substitution in lithium argyrodites Li6+xSnxP1-xSe5I in direct comparison to the previously reported Li6+xSnxP1-xSe5I series. The (P5+/Sn4+)Se-4(3/4-) polyhedral volume, unit cell volume, and lithium coordination tetrahedra Li(48h)-(S/Se)(3)-I increase with Sn substitution in this new selenide series. Impedance spectroscopy reveals that increasing Sn4+ substitution results in a fivefold improvement in the ionic conductivity when compared to Li6PSe5I. This work provides further understanding of compositional influences for optimizing the ionic conductivity of solid electrolytes.

Harvard Citation style: Gautam, A., Ghidiu, M., Hansen, A., Ohno, S. and Zeier, W. (2021) Sn Substitution in the Lithium Superionic Argyrodite Li₆PCh₅I (Ch = S and Se), Inorganic Chemistry, 60(24), pp. 18975-18980. https://doi.org/10.1021/acs.inorgchem.1c02813

APA Citation style: Gautam, A., Ghidiu, M., Hansen, A., Ohno, S., & Zeier, W. (2021). Sn Substitution in the Lithium Superionic Argyrodite Li₆PCh₅I (Ch = S and Se). Inorganic Chemistry. 60(24), 18975-18980. https://doi.org/10.1021/acs.inorgchem.1c02813