Garnet materials for Li secondary batteries and methods of making and using garnet materials

Patent metadata

Field	Value
Publication number	US-12095031-B2
Application number	US-202318299116-A
Country	US
Kind code	B2
Filing date	Apr 12, 2023
Priority date	Oct 7, 2013
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

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.

First claim

What is claimed is:

1. A composition comprising:
a lithium-stuffed garnet powder, wherein the lithium-stuffed garnet powder is characterized by: Li a La b Zr c Al a M″ e O f , wherein 5<a<7.7; 2<b<4; 0<c≤2.5; 0≤d<2; 0≤e<2; 10<f≤13; and Me″ is a metal selected from Nb, Ta, V, W, Mo, or Sb;
wherein the lithium-stuffed garnet powder comprises crystalline domains having a median crystalline domain diameter of 0.5 nm to 10 μm.

2. The composition of claim 1 , wherein the lithium-stuffed garnet powder has a median grain size of between 0.1 μm and 10 μm.

3. The composition of claim 1 , further comprising LiAlO 2 , LiLaO 2 , or Li 2 ZrO 3 .

4. The composition of claim 3 , further comprising LiAlO 2 .

5. The composition of claim 3 , further comprising LiLaO 2 .

6. The composition of claim 3 , further comprising Li 2 ZrO 3 .

Assignees

• Quantumscape Battery Inc

Inventors

• Karpenko Oleh
• Donnelly Niall
• Holme Timothy
• Hudson Will
• Iyer Sriram
• Choi Dong Hee Anna
• Singh Mohit
• Winoto Adrian

Classifications

• H01M2300/0091

  in the form of mixtures · CPC title

• C04B2235/96

  Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance · CPC title

• C04B2235/656

  characterised by specific heating conditions during heat treatment · CPC title

• C04B35/117

  Composites · CPC title

• C04B2235/786

  Micrometer sized grains, i.e. from 1 to 100 micron · CPC title