Garnet materials for Li secondary batteries and methods of making and using garnet materials
First Claim
1. A method for sintering a thin and free standing garnet film, comprising the following steps:
- providing a green tape thin film by casting a garnet slurry;
wherein the slurry comprises a lithium-stuffed garnet and a binder; and
wherein the slurry further comprises at least one member selected from the group consisting of a solvent, a plasticizer, a surfactant, a dispersant, and combinations thereof;
sintering the green tape thin film between setter plates;
wherein at least one of the setter plates is a ceramic setter plate comprising a material having a lithium concentration that is at least 10 atomic percent of the material;
wherein the sintering is heat, spark plasma, or field assisted sintering;
wherein sintering optionally includes applying pressure to the film with the setter plates; and
wherein one of the setter plates comprises ZrO2, SiO2, Al2O3, LiAlO2, LiLaO2, lithium-stuffed garnet, or Li2ZrO3.
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Accused Products
Abstract
Set forth herein are garnet material compositions, e.g., lithium-stuffed garnets and lithium-stuffed garnets doped with alumina, which are suitable for use as electrolytes and catholytes in solid state battery applications. Also set forth herein are lithium-stuffed garnet thin films having fine grains therein. Disclosed herein are novel and inventive methods of making and using lithium-stuffed garnets as catholytes, electrolytes and/or anolytes for all solid state lithium rechargeable batteries. Also disclosed herein are novel electrochemical devices which incorporate these garnet catholytes, electrolytes and/or anolytes. Also set forth herein are methods for preparing novel structures, including dense thin (<50 um) free standing membranes of an ionically conducting material for use as a catholyte, electrolyte, and, or, anolyte, in an electrochemical device, a battery component (positive or negative electrode materials), or a complete solid state electrochemical energy storage device. Also, the methods set forth herein disclose novel sintering techniques, e.g., for heating and/or field assisted (FAST) sintering, for solid state energy storage devices and the components thereof.
180 Citations
16 Claims
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1. A method for sintering a thin and free standing garnet film, comprising the following steps:
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providing a green tape thin film by casting a garnet slurry; wherein the slurry comprises a lithium-stuffed garnet and a binder; and wherein the slurry further comprises at least one member selected from the group consisting of a solvent, a plasticizer, a surfactant, a dispersant, and combinations thereof; sintering the green tape thin film between setter plates; wherein at least one of the setter plates is a ceramic setter plate comprising a material having a lithium concentration that is at least 10 atomic percent of the material; wherein the sintering is heat, spark plasma, or field assisted sintering; wherein sintering optionally includes applying pressure to the film with the setter plates; and wherein one of the setter plates comprises ZrO2, SiO2, Al2O3, LiAlO2, LiLaO2, lithium-stuffed garnet, or Li2ZrO3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification