Lithium manganese oxide spinel compound and method of preparing same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01G-045/02
H01M-004/50
H01B-001/08
출원번호
US-0842459
(2001-04-26)
발명자
/ 주소
Vesselin Manev
Titus Faulkner
D. Wayne Barnette
출원인 / 주소
FMC Corporation
대리인 / 주소
Alston & Bird LLP
인용정보
피인용 횟수 :
20인용 특허 :
94
초록▼
The present invention includes lithium manganese oxide spinel compounds having a low porosity, a high tap density and a high pellet density, and methods of preparing these compounds. In particular, the method comprises preparing a lithium manganese oxide with a spinel structure and having the formul
The present invention includes lithium manganese oxide spinel compounds having a low porosity, a high tap density and a high pellet density, and methods of preparing these compounds. In particular, the method comprises preparing a lithium manganese oxide with a spinel structure and having the formula: wherein: [EQU1]M1, M2, . . . Mk are cations different than lithium or manganese selected from the group consisting of alkaline earth metals, transition metals, B, Al, Si, Ga and Ge;X, Y, m1, m2, . . . mk, each have a value between 0 and 0.2;Z has a value between -0.1 and 0.2; andX, Y, m1, M2. . . mk are selected to satisfy the equation:Y=X+m1+m2+. . . +mk.
대표청구항▼
1. A method of preparing a lithium manganese oxide with a spinel structure and having the formula: [EQU5]wherein:M1, M2, . . . Mk are cations different than lithium or manganese selected from the group consisting of alkaline earth metals, transition metals, B, Al, Si, Ga and Ge; X, Y, m1, m2, . . .
1. A method of preparing a lithium manganese oxide with a spinel structure and having the formula: [EQU5]wherein:M1, M2, . . . Mk are cations different than lithium or manganese selected from the group consisting of alkaline earth metals, transition metals, B, Al, Si, Ga and Ge; X, Y, m1, m2, . . . mk, each have a value greater than or equal to 0 and less than or equal to 0.2; Z has a value greater than or equal to -0.1 and less than or equal to 0.2; and X, Y, m1, m2, . . . mk are selected to satisfy the equation: Y=X+m1+m2+. . . +mk said method comprising the step of:calcining a mixture comprising: at least one highly crystalline manganese oxide selected from the group consisting of Mn2O3 and Mn3O4, said manganese oxide having a specific area of less than 2.0 m2/g and a low porosity such that the pore volume of pores having a mean radius of less than -1 micron in said manganese oxide is no more than 20% of the total pore volume of said manganese oxide; and at least one lithium source compound; in at least one firing step at a temperature greater than or equal to about 400.degree. C. and less than or equal to about 900.degree. C. to form the lithium manganese oxide spinel compound.
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