	US 12,113,172 B2
	Power storage device pre-doping agent and production method for same
Keiichi Watanabe, Osaka (JP); Yuta Kakimoto, Osaka (JP); and Shunsuke Mito, Osaka (JP)
Assigned to Tayca Corporation, Osaka (JP)
Appl. No. 18/260,838
Filed by Tayca Corporation, Osaka (JP)
PCT Filed Feb. 7, 2022, PCT No. PCT/JP2022/004606 § 371(c)(1), (2) Date Jul. 10, 2023, PCT Pub. No. WO2022/172881, PCT Pub. Date Aug. 18, 2022.
Claims priority of application No. 2021-019130 (JP), filed on Feb. 9, 2021.
Prior Publication US 2023/0395854 A1, Dec. 7, 2023
Int. Cl. H01M 10/0567 (2010.01); H01G 11/50 (2013.01); H01G 11/60 (2013.01); H01G 11/62 (2013.01); H01G 11/64 (2013.01); H01M 4/62 (2006.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01)

CPC H01M 10/0567 (2013.01) [H01G 11/50 (2013.01); H01G 11/60 (2013.01); H01G 11/62 (2013.01); H01G 11/64 (2013.01); H01M 4/624 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0037 (2013.01); H01M 2300/0051 (2013.01)]

18 Claims

1. A pre-doping agent for a power storage device comprising a lithium iron oxide represented by Formula (1), wherein in X-ray diffractometry, a half width of a diffraction peak at a diffraction angle (2θ) of 23.6±0.5° is 0.06 to 0.17°, and an intensity ratio (I44.6/I23.6) of a diffraction peak intensity (I44.6) at a diffraction angle (2θ) of 44.6±0.5° to a diffraction peak intensity (I23.6) at a diffraction angle (2θ) of 23.6±0.5° is 2% or less:

LixFeOy (1)

wherein x meets 3.5≤x≤7.0 and y meets 3.1≤y≤5.0.