Patent ID: 11949095
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 12:
13. A method of preparing a composite solid electrolyte, the method comprising:
providing a solid electrolyte having a NASICON type crystal structure and including elements of Li, Ti, Al, P, and O;
disposing a first layer comprising a first element on the solid electrolyte, wherein the first element has a Gibbs reaction energy of greater than 0 electron-volts per mole;
heat-treating the first layer to oxidize the first element and form an oxide comprising the first element;
depositing a metal on the oxide to form a current collector;
contacting the oxide, the current collector, or a combination thereof with a liquid electrolyte comprising lithium; and
applying a voltage to reduce the oxide to form a compound represented by Formula 1 to form a protective layer on the solid electrolyte and prepare the composite solid electrolyte of claim 1.