NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY METHOD FOR PREPARING SAME NEGATIVE ELECTRODE INCLUDING THE SAME AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

Provided is a negative electrode active material for a lithium secondary battery, comprising: natural graphite including secondary particles in which a plurality of primary particles are assembled; amorphous carbon present on the surface of the primary particles; and an amorphous carbon coated layer...

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Bibliographic Details
Main Authors LEE EUNJOO, NAH JAEHOU
Format Patent
LanguageEnglish
Korean
Published 17.03.2020
Subjects
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:Provided is a negative electrode active material for a lithium secondary battery, comprising: natural graphite including secondary particles in which a plurality of primary particles are assembled; amorphous carbon present on the surface of the primary particles; and an amorphous carbon coated layer comprising amorphous carbon surrounding the secondary particles. The primary particles have a particle diameter of 5-15 μm, the secondary particles have a particle diameter of 8-24 μm, and the peak intensity ratio I(002)/I(110) measured by an X-ray diffraction analysis method is 120 or less. 복수의 1차 입자가 조립된 2차 입자를 포함하는 천연흑연; 상기 1차 입자의 표면에 존재하는 비정질 카본; 및 상기 2차 입자를 둘러싸는 비정질 카본을 포함하는 코팅층을 포함하고, 상기 1차 입자는 5 ㎛ 내지 15 ㎛의 입경을 가지고, 상기 2차 입자는 8 ㎛ 내지 24 ㎛의 입경을 가지며, X선 회절 분석법에 의해 측정된 피크 강도비 I(002)/I(110)가 120 이하인, 이차 전지용 음극 활물질을 제공한다.
Bibliography:Application Number: KR20180106955