US 12,330,936 B2
Method for preparing ceramic solid electrolyte for lithium secondary battery
Jung Woo Son, Cheongju-si (KR); Ji Won Son, Changwon-si (KR); and Jae Kwang Kim, Changwon-si (KR)
Assigned to SEVEN KING ENERGY CO., LTD., Seongnam-si (KR)
Appl. No. 17/045,487
Filed by SEVEN KING ENERGY CO., LTD., Seongnam-si (KR)
PCT Filed Mar. 27, 2019, PCT No. PCT/KR2019/003528
§ 371(c)(1), (2) Date Oct. 5, 2020,
PCT Pub. No. WO2019/194454, PCT Pub. Date Oct. 10, 2019.
Claims priority of application No. 10-2018-0039464 (KR), filed on Apr. 5, 2018.
Prior Publication US 2021/0155480 A1, May 27, 2021
Int. Cl. H01M 10/52 (2006.01); C01B 25/45 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01)
CPC C01B 25/45 (2013.01) [C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2006/40 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for preparing a ceramic solid electrolyte comprising:
a step of making a precursor of ceramic solid electrolyte by mixing raw materials of the ceramic solid electrolyte with distilled water;
a step of mixing the precursor of the ceramic solid electrolyte in a solution state by ball-milling;
a step of drying the distilled water to obtain a dried product;
a step of first heat treatment of the dried product at 300° C. to 500° C. for 2 hours to 10 hours to obtain a first heat treatment product; and
a step of second heat treatment of the first heat treatment product at 900° C. to 1200° C. for 2 hours to 10 hours.