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公开(公告)号：US11757095B2
公开(公告)日：2023-09-12
申请号：US16609742
申请日：2019-05-31
Inventor： Huibin Zhang , Ying Wang , Jinfu Wang , Hongdong Zhao , Longwei Niu
CPC classification number: H01M4/525 , B01J8/0055 , B01J8/087 , B01J8/12 , C01G53/42 , C01G53/50 , H01B1/08 , H01M4/0471 , H01M4/505 , B01J2208/00168 , B01J2208/00176 , B01J2208/00796 , C01P2002/52 , C01P2002/72 , C01P2006/40
Abstract: The present disclosure provides a method for preparing a transition metal lithium oxide, comprising steps of: A) mixing a lithium salt and a transition metal compound, and performing a pretreatment to obtain a precursor; wherein the pretreatment temperature is 100-300° C.; and the pretreatment time is 1-10 h; B) precalcining the precursor to obtain an intermediate; and C) continuously feeding the intermediate into a feed port of a moving bed reactor, and calcining, to obtain a transition metal lithium oxide. In the present disclosure, a pretreatment process is performed before the precalcination, and the pretreatment temperature and time are further limited, thereby solving the problem of material hardening during the calcination process of battery materials. In conjunction with using a moving bed reactor, the gas phase and the solid phase are sufficiently contacted, and at the same time the thickness of the filler is increased, the productivity is enhanced and the oxygen consumption is largely decreased at the same time. The present disclosure further provides an apparatus for preparing a transition metal lithium oxide.
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公开(公告)号：US11643338B2
公开(公告)日：2023-05-09
申请号：US16955777
申请日：2019-12-02
Inventor： Huibin Zhang , Ying Wang , Jinfu Wang , Longwei Niu , Hongdong Zhao
CPC classification number: C01G53/50 , B01J6/001 , B01J8/0055 , B01J8/24 , B01J2208/00176 , B01J2208/00548 , C01P2002/72 , C01P2004/03 , C01P2004/61 , C01P2004/64
Abstract: Provided is a method for producing a lithium transition metal oxide, comprising, A) mixing a lithium salt and a precursor, adding the mixture into a reactor for precalcination; the lithium salt has a particle size D50 of 10-20 μm and the precursor has a particle size D50 of 1-20 μm, and the precursor is one or more selected from transition metal oxyhydroxide, transition metal hydroxide and transition metal carbonate; and B) adding the product obtained from the precalcination into a fluidized bed reactor, subjecting to a first calcination and a second calcination to obtain the lithium transition metal oxide. Raw materials for the lithium transition metal oxide further includes a main-group metal compound containing oxygen, which is added in the precalcination, the first calcination or the second calcination; and the main-group metal compound containing oxygen has an average particle size of 10-100 nm. A fluidized bed reactor is also provided.
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