Solid-state lithium battery
| DWPI Title: Method for fabricating lanthanum lithium tantalate electrolyte layer on metal substrate used in solid-state lithium battery, involves annealing film at crystallization temperature and oxygen partial pressure sufficiently high |
| 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. |
| Use: Method for fabricating a lanthanum lithium tantalate electrolyte layer on a metal substrate used in a solid-state lithium battery. |
| Advantage: The method enables developing lithium-stable, higher-conductivity electrolytes to enable energy storage devices with greater power. The method enables preparing solid electrolytes requiring high processing temperatures, thus avoiding potential degradation of a cathode material. The method enables using inexpensive flexible metal foil substrates with quick -ion conductors in electrochemical storage devices with a very low form factor, thus realizing high power. |
| Novelty: The method involves depositing a precursor lanthanium lithium tantalate film on a metal substrate. The film is annealed at crystallization temperature and oxygen partial pressure sufficiently high that lanthanum, lithium and tantalum metals are stable as oxides and low enough that the metal substrate remains metallic to provide a lanthanum lithium tantalate electrolyte layer on the metal substrate. An A-site precursor solution and a B-site precursor solution are mixed together. |
| Filed: 5/23/2012 |
| Application Number: US13478766A |
| Tech ID: SD 11322.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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