Correlation of Structure and Fast Ion Conductivity in the Solid Solution Series Li1+2xZn1–x PS 4
Solid electrolytes are the foundation of all-solid-state batteries (ASSB) and have the potential to provide improved safety and higher energy density than existing liquid battery systems. In the important search for new lithium ion conductors with fast ionic conductivity and good mechanical properti...
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Published in | Chemistry of materials Vol. 30; no. 3 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Chemical Society (ACS)
06.02.2018
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Subjects | |
Online Access | Get full text |
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Summary: | Solid electrolytes are the foundation of all-solid-state batteries (ASSB) and have the potential to provide improved safety and higher energy density than existing liquid battery systems. In the important search for new lithium ion conductors with fast ionic conductivity and good mechanical properties, thiophosphates are a particularly promising class of materials. The first experimental elucidation of new lithium ion conductors in the Li1+2xZn1-xPS4 (LZPS) solid solution whose existence had been predicted by theory is reported in this paper. Using neutron and synchrotron x-ray powder diffraction together with electrical impedance, and Raman studies, we resolve their crystalline nature and correlate this with ionic conductivity upon increasing the lithium/zinc ratio. We demonstrate that the materials exhibit high experimental ionic conductivities - up to 8 × 10-4 S·cm-1 - and show the nature of likely pathways for lithium ion conduction. |
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Bibliography: | BASF International Scientific Network for Electrochemistry and Batteries Natural Sciences and Engineering Research Council of Canada (NSERC) AC02-06CH11357 USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division |
ISSN: | 0897-4756 1520-5002 |