Janus in situ formed CoO/Li 2 CO 3 /LiF interlayer between LiCoO 2 and Li 6 PS 5 Cl solid electrolytes boosting the 4.5 V performance of sulfide-based all-solid-state batteries

This study uses PVDF high-temperature treatment to modify LiCoO 2 cathodes for solid-state lithium batteries, forming a CoO/Li 2 CO 3 /LiF coating that improves interfacial stability and reduces resistance, enhancing high-voltage performance.