US 12,237,475 B2
Lithium-stuffed garnet electrolytes with a reduced surface defect density and methods of making and using the same
David Cao, San Jose, CA (US); Cheng-Chieh Chao, San Jose, CA (US); Zhebo Chen, San Jose, CA (US); Lei Cheng, San Jose, CA (US); Niall Donnelly, Malvern, PA (US); Wes Hermann, Palo Alto, CA (US); Timothy Holme, Mountain View, CA (US); Tommy Huang, San Jose, CA (US); Kian Kerman, San Jose, CA (US); Yang Li, San Jose, CA (US); and Harsh Maheshwari, San Jose, CA (US)
Assigned to QuantumScape Battery, Inc., San Jose, CA (US)
Filed by QuantumScape Battery, Inc., San Jose, CA (US)
Filed on Jul. 7, 2023, as Appl. No. 18/348,981.
Application 18/348,981 is a continuation of application No. 16/343,361, granted, now 11,916,200, previously published as PCT/US2017/057462, filed on Oct. 19, 2017.
Claims priority of provisional application 62/411,476, filed on Oct. 21, 2016.
Prior Publication US 2024/0006667 A1, Jan. 4, 2024
Int. Cl. H01M 50/403 (2021.01); C01G 25/00 (2006.01); C04B 35/44 (2006.01); C04B 35/486 (2006.01); C04B 35/495 (2006.01); C04B 35/622 (2006.01); C04B 35/645 (2006.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); H01M 10/42 (2006.01); H01M 50/431 (2021.01); H01M 50/46 (2021.01); H01M 50/489 (2021.01); H01M 50/406 (2021.01); H01M 50/491 (2021.01)
CPC H01M 10/4235 (2013.01) [C01G 25/006 (2013.01); C04B 35/44 (2013.01); C04B 35/486 (2013.01); C04B 35/495 (2013.01); C04B 35/62218 (2013.01); C04B 35/6455 (2013.01); H01M 4/0447 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 50/431 (2021.01); H01M 50/46 (2021.01); H01M 50/489 (2021.01); C01P 2002/30 (2013.01); C01P 2002/72 (2013.01); C01P 2004/02 (2013.01); C01P 2004/03 (2013.01); C01P 2004/52 (2013.01); C01P 2004/61 (2013.01); C01P 2006/16 (2013.01); C01P 2006/40 (2013.01); C01P 2006/90 (2013.01); C04B 2235/3203 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3251 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/3839 (2013.01); C04B 2235/443 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5463 (2013.01); C04B 2235/764 (2013.01); C04B 2235/786 (2013.01); C04B 2235/963 (2013.01); H01M 50/403 (2021.01); H01M 50/406 (2021.01); H01M 50/491 (2021.01); H01M 2300/0071 (2013.01)] 17 Claims
 
1. A method for reducing the number of defects on a single layer sintered lithium-stuffed garnet thin film, the method comprising the following steps in the following order:
providing a single layer sintered lithium-stuffed garnet thin film in contact with a current collector layer in a first step, wherein the single layer sintered lithium-stuffed garnet thin film comprises a top surface;
heating the single layer sintered lithium-stuffed garnet thin film to 700° C. to 1200° C. for 1 hour to 10 hours in an inert or reducing atmosphere in a second step;
wherein the inert or reducing atmosphere comprises a member selected from the group consisting of Ar, Ar/H2, N2, or combinations thereof; and
cooling the single layer sintered lithium-stuffed garnet thin film in a third step in the inert or reducing atmosphere;
wherein the current collector layer comprises a metal selected from Al, Cu, Ni, steel, or alloys thereof, or combinations thereof.