Controllable Li3PS4-Li4SnS4 solid electrolytes with affordable conductor and high conductivity for solid-state battery
Résumé
High ionic conductivity, low grain boundary impedance, and stable electrochemical property have become the focus for all-solid-state lithium-sulfur batteries (ASSLSB). One of the approaches is to promote the rapid diffusion of lithium ions by regulating the chemical bond interactions within the framework. The structure control of P5+ substitution for Sn4+ on lithium-ion transport was explored for a series of Li3PS4-Li4SnS4 glass-ceramic electrolytes. Results showed that the grain boundary impedance of the glass electrolyte was reduced after heat treatments. The formation of LiSnPS microcrystals, a good superionic conductor, was detected by X-ray diffraction tests. Electrochemical experiments obtained the highest conductivity of 29.5 S cm(-1) at 100 degrees C and stable electrochemical window from -0.1 to 5 V at 25 degrees C. In addition, the cell battery was assembled with prepared electrolyte, which is promoted as a candidate solid electrolyte material with improved performance for ASSLSB.
Domaines
Chimie
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Dong et al. - 2022 - Controllable Li3PS4–Li4SnS4 solid electrolytes wit.pdf (1.72 Mo)
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jace18287-sup-0001-figures1.png (34.74 Ko)
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jace18287-sup-0003-suppmat.pdf (425.98 Ko)
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