Interfacial study and modulation of high-voltage layered cathode based all-solid-state batteries.

Employing layered materials as the cathodes for solid-state batteries (SSBs) is vital in enhancing the batteries' energy density, whereas numerous issues are present regarding the compatibilities between cathode electrode and modified solid electrolyte (ME) in this battery configuration. By investigating the electrochemical performance and interfacial properties of SSBs using various cathodes, the fundamental reason for the poor compatibility between layered cathodes, especially LiCoO with ME is revealed. Because of the Li(solvent) intercalation environments formed in the ME, the resultant weak-interacted TFSI could be adsorbed and destabilized by Co ions on the surface.