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US 2012/0177994 A1Published application
Cathode active material, cathode and lithium battery including cathode active material, and method of preparing the cathode active material
AssigneeSamsung SDI Co., Ltd.
InventorsMin-Ju KIM, Yong-Chul PARK, Gyeong-Jae HEO, Hyun-Deok LEE, Mi-Ran SONG, Jin-Hyoung SEO, Na-Leum YOO
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Abstract
A cathode active material including: a lithium manganese oxide of which primary particles has a diameter of 1 μm or more and which has a spinel structure in which an X-ray diffraction (XRD) peak intensity ratio of I(111)/I(311) is 1.0 or more; and a boron element disposed at least one position selected from the group consisting of inside the primary particles and on surfaces of the primary particles.
Claims20
A cathode active material comprising:
- a lithium manganese oxide comprising primary particles having a diameter of about 1 μm or more and which has a spinel structure in which an X-ray diffraction (XRD) peak intensity ration of I(111)/I(311) is about 1.0 or more;
- and
- a boron element disposed on at least one position selected from the group consisting of inside the primary particles and on surfaces of the primary particles.
A method of preparing a cathode active material, the method comprising:
- mixing a lithium precursor, a manganese precursor, a boron-based compound prepare a mixture;
- and
- calcinating the mixture at a temperature of from about 700° C. to about 900° C.
Dependencies are inferred from the claim text.