	US 12,469,875 B2
	Composite oxide powder, method for producing composite oxide powder, method for producing solid electrolyte object, and method for producing lithium ion secondary battery
Hideki Yoshioka, Kawanishi (JP); and Ryohei Mori, Kawanishi (JP)
Assigned to FUJI PIGMENT CO., LTD., Kawanishi (JP); and GS ALLIANCE CO., LTD., Kawanishi (JP)
Appl. No. 17/762,553
Filed by FUJI PIGMENT CO., LTD., Kawanishi (JP); and GS ALLIANCE CO., LTD., Kawanishi (JP)
PCT Filed Sep. 24, 2020, PCT No. PCT/JP2020/035962 § 371(c)(1), (2) Date Mar. 22, 2022, PCT Pub. No. WO2021/060349, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-175683 (JP), filed on Sep. 26, 2019; and application No. 2020-052231 (JP), filed on Mar. 24, 2020.
Prior Publication US 2022/0344707 A1, Oct. 27, 2022
Int. Cl. H01M 10/0562 (2010.01); C01G 25/00 (2006.01); C04B 35/488 (2006.01); C04B 35/50 (2006.01); C04B 35/626 (2006.01); H01M 10/052 (2010.01)

CPC H01M 10/0562 (2013.01) [C01G 25/006 (2013.01); C04B 35/488 (2013.01); C04B 35/50 (2013.01); C04B 35/6264 (2013.01); H01M 10/052 (2013.01); C01P 2002/74 (2013.01); C01P 2002/77 (2013.01); C01P 2004/62 (2013.01); C01P 2006/40 (2013.01); C04B 2235/764 (2013.01); H01M 2300/0071 (2013.01)]

15 Claims

1. A composite oxide powder comprising particles comprising lithium (Li), lanthanum (La), zirconium (Zr), and oxygen (O), and having a cubic garnet-type crystal structure,

wherein the particles have a basic composition represented by the formula: Li₇La₃Zr₂O₁₂;

the composite oxide powder having a 50% diameter (D50) in a volume particle size distribution of 1000 nm or less, and a content ratio of a pyrochlore phase of 10 mass % or less; and

the composite oxide powder has a peak half width of a (211) diffraction line in an X-ray diffraction (XRD) profile of 0.50° or less.