Fluorine-doped Li3InCl6 to enhance ionic conductivity and air stability

Halide solid electrolyte, as a new family of solid electrolytes, has attracted much attention in recent years because of its easy preparation and high ionic conductivity at room temperature. However, most halides absorb moisture and suffer irreversible chemical degradation when exposed to humid air. This work uses F doping means to prepare Li3InCl5.8F0.2 solid electrolyte. The contact angle and electrochemical performance tests were used to confirm that fluorine (F) doping can simultaneously improve the ionic conductivity and air stability of Li3InCl6. Meanwhile, the cracks on the surface of the material and the electronic conductivity can be reduced. Therefore, the obtained Li3InCl5.8F0.2 solid electrolyte by F doping strategy shows significant potential in the all-solid-state lithium battery.