Solid-state battery electrolyte with increased stability to cathode materials

摘要

Electrochemical devices, such as lithium ion battery electrodes, lithium ion conducting solid-state electrolytes, and solid-state lithium ion batteries comprising such electrodes and solid-state electrolytes are disclosed. Also disclosed are composite electrodes for solid-state electrochemical devices. The composite electrode includes one or more separate phases within the electrode that provide electron and ion conduction paths on the electrode active material. A method of forming a composite electrode for an electrochemical device is also disclosed. One exemplary method includes forming a mixture comprising (a) (i) a lithium host material, and (ii) a ceramic material having a crystal structure and a solid-state conductive material comprising a dopant in the crystal structure; And (b) sintering the mixture, wherein the dopant is selected so that the solid-state conductive material retains the crystal structure during sintering with the lithium host material.