Journal article

Publication year: 2018

Pages: 16330-16339

Journal: Journal of the American Chemical Society

Volume number: 140

Issue number: 47

ISSN: 0002-7863

eISSN: 1520-5126

Open access status: Green

DOI Link: https://doi.org/10.1021/jacs.8b10282

Publisher: American Chemical Society

Abstract: 
Solid-state batteries with inorganic solid electrolytes are currently being discussed as a more reliable and safer future alternative to the current lithium-ion battery technology. To compete with state-of-the-art lithium-ion batteries, solid electrolytes with higher ionic conductivities are needed, especially if thick electrode configurations are to be used. In the search for optimized ionic conductors, the lithium argyrodites have attracted a lot of interest. Here, we systematically explore the influence of aliovalent substitution in Li6+xP1-xGexS5I using a combination of X-ray and neutron diffraction, as well as impedance spectroscopy and nuclear magnetic resonance. With increasing Ge content, an anion site disorder is induced and the activation barrier for ionic motion drops significantly, leading to the fastest lithium argyrodite so far with 5.4 +/- 0.8 mS cm(-1) in a cold-pressed state and 18.4 +/- 2.7 mS cm(-1) upon sintering. These high ionic conductivities allow for successful implementation within a thick-electrode solid-state capacity fade over 150 cycles. The observed changes in the activation barrier and changing site approach toward designing better performing solid electrolytes. battery that shows negligible disorder provide an additional approach toward designing better performing solid electrolytes.

Harvard Citation style: Kraft, M., Ohno, S., Zinkevich, T., Koerver, R., Culver, S., Fuchs, T., et al. (2018) Inducing High Ionic Conductivity in the Lithium Superionic Argyrodites Li_6+x P_1-xGe_xS₅l for All -Solid-State Batteries, Journal of the American Chemical Society, 140(47), pp. 16330-16339. https://doi.org/10.1021/jacs.8b10282

APA Citation style: Kraft, M., Ohno, S., Zinkevich, T., Koerver, R., Culver, S., Fuchs, T., Senyshyn, A., Indris, S., Morgan, B., & Zeier, W. (2018). Inducing High Ionic Conductivity in the Lithium Superionic Argyrodites Li_6+x P_1-xGe_xS₅l for All -Solid-State Batteries. Journal of the American Chemical Society. 140(47), 16330-16339. https://doi.org/10.1021/jacs.8b10282