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US 2025/0178968 A1Published application
Processes and materials for casting and sintering green garnet thin films
AssigneeQuantumScape Battery, Inc.
InventorsOleh KARPENKO, Gengfu Xu, Niall Donnelly, Sriram Iyer, Timothy Holme
Life of this patent
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Abstract
Set forth herein are processes and materials for making ceramic thin films by casting ceramic source powders and precursor reactants, binders, and functional additives into unsintered thin films and subsequently sintering the thin films under controlled atmospheres and on specific substrates.
Claims118
A method for sintering a green tape, the method comprising:
- (a) providing at least one source powder;
- (b) modifying the at least one source powder to prepare a modified source powder;
- (c) providing a slurry of the modified source powder;
- (d) casting the slurry to form a green tape;
- (e) drying the green tape;
- and
- (f) sintering the green tape.
4 more elements
A slurry for preparing a cast green film, the slurry comprising:
- at least two or more of:
- a solvent selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol, isobutanol, t-butanol, pentanol, hexanol,
- cyclohexanone cyclohexanol, methyl acetate, ethyl acetate, methyl-ethyl ketone (MEK), acetone, toluene, hexanes, acetic acid, and combinations thereof;
- a binder selected from the group consisting of fish oil, polyvinylbutylene (PVB), KD1, an acrylic acid, triton, phosphate esters, and derivatives thereof;
- a plasticizer selected from the group consisting of a benzyl butyl phthalate or di-butyl phthalate;
- optionally a pH modifier;
- optionally a sintering aid;
- and
- a source powder selected from a lithium-stuffed garnet
6 more elements
A green tape, comprising:
- a source powder;
- a solvent;
- a binder;
- and
- a dispersant;
- wherein the green tape has a picnometry density greater than 3.9 and less than 5.0 g·cm3.
3 more elements
A method of making a green tape, comprising
- (a) providing a slurry;
- (b) providing a binder mixture;
- (c) mixing the slurry with the binder mixture to form a mixed slurry;
- and
- (d) casting the mixed slurry to provide a green tape.
2 more elements
Dependencies are inferred from the claim text.