	US 12,269,739 B2
	Method for producing positive electrode active material for alkali ion secondary batteries
Tsuyoshi Honma, Nagaoka (JP); Masafumi Hiratsuka, Nagaoka (JP); Hideo Yamauchi, Otsu (JP); Ayumu Tanaka, Otsu (JP); Kei Tsunoda, Otsu (JP); and Yoshinori Yamazaki, Otsu (JP)
Assigned to NIPPON ELECTRIC GLASS CO., LTD., Shiga (JP); and NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY, Niigata (JP)
Appl. No. 18/273,283
Filed by NIPPON ELECTRIC GLASS CO., LTD., Otsu (JP); and NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY, Nagaoka (JP)
PCT Filed Feb. 3, 2022, PCT No. PCT/JP2022/004177 § 371(c)(1), (2) Date Jul. 20, 2023, PCT Pub. No. WO2022/176627, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 2021-022506 (JP), filed on Feb. 16, 2021; and application No. 2021-173855 (JP), filed on Oct. 25, 2021.
Prior Publication US 2024/0116759 A1, Apr. 11, 2024
Int. Cl. C01B 25/45 (2006.01); C01D 15/02 (2006.01); H01M 4/58 (2010.01); H01M 10/054 (2010.01)

CPC C01B 25/45 (2013.01) [C01D 15/02 (2013.01); H01M 4/5825 (2013.01); C01P 2002/72 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 10/054 (2013.01)]

6 Claims

1. A method for producing a positive electrode active material for an alkali ion secondary battery, the positive electrode active material comprising, in terms of mol %, 34% or more of CrO+FeO+MnO+CoO+NiO, and the method comprising:

preparing a positive electrode active material precursor containing crystals; and

irradiating the positive electrode active material precursor with light to melt the crystals and amorphize at least a portion of the positive electrode active material precursor.