Solid-state lithium battery
AssigneeSandia Corporation
InventorsJon Ihlefeld, Paul G. Clem, Cynthia Edney, David Ingersoll, Ganesan Nagasubramanian, Kyle Ross Fenton
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Abstract
The present invention is directed to a higher power, thin film lithium-ion electrolyte on a metallic substrate, enabling mass-produced solid-state lithium batteries. High-temperature thermodynamic equilibrium processing enables co-firing of oxides and base metals, providing a means to integrate the crystalline, lithium-stable, fast lithium-ion conductor lanthanum lithium tantalate (La1/3-xLi3xTaO3) directly with a thin metal foil current collector appropriate for a lithium-free solid-state battery.
Claims10
A method for fabricating a lanthanum lithium tantalate electrolyte layer on a metal substrate, comprising:
- depositing a precursor lanthanium lithium tantalate film on a metal substrate;
- and
- annealing the film at a crystallization temperature and oxygen partial pressure sufficiently high that the lanthanum, lithium, and tantalum are stable as oxides but low enough that the metal substrate remains metallic to provide a lanthanum lithium tantalate electrolyte layer on a metal substrate.
Dependencies are inferred from the claim text.