Patent ID: 11881596
Assignee: QUANTUMSCAPE BATTERY, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An electrochemical stack, comprising:
a lithium metal (Li) negative electrode, a positive electrode, an electrolyte separator film comprising a lithium-stuffed garnet, and a bonding layer; wherein the bonding layer comprises a lithium salt, a polymer, and a solvent;
wherein the polymer in the bonding layer is selected from polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), polyvinylidene fluoride hexafluoropropylene (PVDF-HFP), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), polyvinyl pyrrolidone (PVP), polyethylene oxide (PEO), polyethylene oxide poly(allyl glycidyl ether) (PEO-AGE), polyethylene oxide 2-(methoxyethoxy)ethyl glycidyl ether (PEO-MEEGE), polyethylene oxide 2-(methoxyethoxy)ethyl glycidyl poly(allyl glycidyl ether) (PEO-MEEGE-AGE), polyethylene carbonate, polyphenylene sulfide, polypropylene carbonate, and combinations thereof; and
wherein the bonding layer is characterized by a thickness about 1 nm to about 5 μm;
wherein the electrolyte separator film is characterized by a thickness of 0.1 μm to about 50 μm;
wherein the electrolyte separator has a density greater than 95% of its theoretical density as determined by scanning electron microscopy;
wherein the electrolyte separator film is in direct contact with the Li metal negative electrode; and
wherein the bonding layer directly contacts, and is positioned between, the electrolyte separator film and the positive electrode; wherein the electrolyte separator has a surface directly contacting the lithium metal negative electrode, wherein the surface only includes material which is the same as the material in a bulk of the electrolyte separator.