Dielectric Modification of 5V‐Class Cathodes for High‐Voltage All‐Solid‐State Lithium Batteries

A “5V-class” all-solid-state lithium battery (Li/Li3.2PO3.8N0.2/LiCr0.05Ni0.45Mn1.5O4-δ) demonstrates an improved rate capability when its electrolyte/cathode interface is modified by dielectric BaTiO3 nanoparticles. Such “dielectric modification” is supposed to be able to resolve a Li+-deficient layer at the interface, which has limited the charge-transfer reactions rates.