	US 12,006,228 B2
	Preparation method for high density aluminum doped cobalt oxide
Kaihua Xu, Jiangsu (CN); Zhenkang Jiang, Jiangsu (CN); Aiqing Zhang, Jiangsu (CN); Bingzhong Li, Jiangsu (CN); Chao Wang, Jiangsu (CN); and Dongwei Xu, Jiangsu (CN)
Assigned to GEM (JIANGSU) COBALT INDUSTRY CO., LTD., Taizhou (CN)
Filed by GEM (Jiangsu) Cobalt Industry Co., Ltd., Jiangsu (CN)
Filed on Jun. 16, 2022, as Appl. No. 17/842,761.
Application 17/842,761 is a continuation of application No. PCT/CN2019/126213, filed on Dec. 18, 2019.
Claims priority of application No. 201911303146.2 (CN), filed on Dec. 17, 2019.
Prior Publication US 2022/0315444 A1, Oct. 6, 2022
Int. Cl. H01M 4/525 (2010.01); C01G 51/04 (2006.01)

CPC C01G 51/04 (2013.01) [H01M 4/525 (2013.01); C01P 2002/54 (2013.01); C01P 2002/74 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01)]

18 Claims

1. A preparation method for high density aluminum doped cobalt oxide, comprising following steps:

step 1: adding a cobalt salt solution, an alkaline solution and an oxidizer to a reactor for coprecipitation reaction and obtain precipitation products; adding an aluminum cobalt solution to reaction system for reaction after the precipitation products' D50 reaches 2.0-2.5 μm; and stopping adding the aluminum cobalt solution after the precipitation products' D50 reaches 3.5-4.0 μm, keeping other conditions unchanged, continuing the reaction, and stopping the reaction when the precipitation products' D50 reaches a desired particle size, thus obtaining aluminiferous cobalt oxyhydroxide slurry;

step 2: aging, dehydrating, washing and drying the aluminiferous cobalt oxyhydroxide slurry obtained in step 1, thus obtaining aluminiferous cobalt oxyhydroxide powder; and

step 3: calcining the aluminiferous cobalt oxyhydroxide powder obtained in step 2, thus obtaining high density aluminum doped cobalt oxide.