Lithium stuffed garnet setter plates for solid electrolyte fabrication

US10746468B2 · kind B2 · utility

Assignee

• QuantumScape Corporation · US

Inventors

• Sriram Iyer · Cupertino, US
• Tim Holme · San Jose, US
• Niall Donnelly · San Jose, US

Key dates

• Filing date: Oct 18, 2017
• Grant date: Aug 18, 2020
• Expiry date: Sep 16, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Setter plates are fabricated from Li-stuffed garnet materials having the same, or substantially similar, compositions as a garnet Li-stuffed solid electrolyte. The Li-stuffed garnet setter plates, set forth herein, reduce the evaporation of Li during a sintering treatment step and/or reduce the loss of Li caused by diffusion out of the sintering electrolyte. Li-stuffed garnet setter plates, set forth herein, maintain compositional control over the solid electrolyte during sintering when, upon heating, lithium is prone to diffuse out of the solid electrolyte.