US 11,916,200 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); Tim 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.
Appl. No. 16/343,361
Filed by QuantumScape Battery, Inc., San Jose, CA (US)
PCT Filed Oct. 19, 2017, PCT No. PCT/US2017/057462
§ 371(c)(1), (2) Date Apr. 18, 2019,
PCT Pub. No. WO2018/075809, PCT Pub. Date Apr. 26, 2018.
Claims priority of provisional application 62/411,476, filed on Oct. 21, 2016.
Prior Publication US 2019/0245178 A1, Aug. 8, 2019
Int. Cl. H01M 50/403 (2021.01); H01M 10/42 (2006.01); H01M 10/0562 (2010.01); C04B 35/495 (2006.01); C04B 35/486 (2006.01); C04B 35/622 (2006.01); C04B 35/44 (2006.01); C04B 35/645 (2006.01); H01M 50/431 (2021.01); H01M 50/46 (2021.01); H01M 50/489 (2021.01); C01G 25/00 (2006.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); H01M 50/491 (2021.01); H01M 50/406 (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)] 16 Claims
OG exemplary drawing
 
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 a first step;
heating the top and/or bottom surfaces of the sintered lithium-stuffed garnet thin film to 700° C. to 1200° C. for 1 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 sintered lithium-stuffed garnet thin film in a third step in the inert or reducing atmosphere;
wherein the single layer sintered lithium-stuffed garnet thin film is not in contact with an unsintered lithium-stuffed garnet thin film.