The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Jun. 17, 2022
Gem (Jiangsu) Cobalt Industry Co., Ltd., Jiangsu, CN;
Kaihua Xu, Jiangsu, CN;
Zhenkang Jiang, Jiangsu, CN;
Aiqing Zhang, Jiangsu, CN;
Bingzhong Li, Jiangsu, CN;
Chao Wang, Jiangsu, CN;
Dongwei Xu, Jiangsu, CN;
Qiyong Shi, Jiangsu, CN;
Fan Bi, Jiangsu, CN;
Chao Ning, Jiangsu, CN;
GEM (Jiangsu) Cobalt Industry Co., Ltd., Taizhou, CN;
Abstract
The present invention discloses a preparation method for 2-4 μm battery-grade cobalt tetroxide, comprises following steps: 1) adding a cobalt salt solution and an alkaline solution by parallel flows to a reactor with a base solution and an air flow, controlling pH value of a system by adjusting flow rate of the alkaline solution for coprecipitation reaction at a certain stirring rate, decreasing the pH value of the reaction system and increasing flow rate of the cobalt salt solution after the reaction solutions begin to overflow; 2) aging and drying the cobalt oxyhydroxide slurry in sequence; 3) calcining the dried cobalt oxyhydroxide. By adopting this method, tap density of the battery-grade cobalt tetroxide obtained is much higher than that of cobalt tetroxide with a same particle size specification prepared by the prior art.