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

US10439251B2 · kind B2 · utility

Assignee

• QuantumScape Corporation · US

Inventors

• Tim Holme · San Jose, US
• Niall Donnelly · San Jose, US
• Sriram Iyer · Cupertino, US
• Adrian Winoto · San Francisco, US
• Mohit Singh · Berkeley, US
• Will Hudson · Belmont, US
• Dong Hee Anna Choi · San Jose, US
• Oleh Karpenko · San Jose, US
• Kian Kerman · San Jose, US

Key dates

• Filing date: Oct 11, 2017
• Grant date: Oct 8, 2019
• Expiry date: Nov 25, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed 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 disclosed herein are lithium-stuffed garnet thin films having fine grains therein. Also disclosed herein are 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 electrochemical devices which incorporate these garnet catholytes, electrolytes and/or anolytes. Also disclosed herein are methods for preparing 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 disclosed herein are sintering techniques, e.g., for heating and/or field assisted (FAST) sintering, for solid state energy storage devices and the components thereof.