24-08-2018 дата публикации
Номер: KR1020180094567A
Автор:
CHO, SUNG WOO,
CHOI, CHANG MIN,
OH, JI WOO,
JUNG, HEE WON,
CHOI, SU AN,
JEON, SANG HOON,
AN, JI SUN
Принадлежит:
The present invention relates to an anode active material for a lithium secondary battery, which comprises: a lithium composite oxide core; and a surface part located on the surface of the core part, wherein the surface part includes Al element and M element, M is Mg, Ti, Ca, W, B, Ba, Zr, or a combination thereof and the element of the surface portion satisfies the content of following mathematical expression 1: Y=AX+C. In the mathematical expression 1, Y is the total amount of Al and M in the surface part, X is a BET specific surface area value of the anode active material, C is a minimum value of Al, B, And M, A is the slope for X and Y, and following formulas are satisfied: 1500 < A <= 1800 and 600 <= C < 1000. An object of the present invention is to provide an optimal surface treatment condition of the anode active material capable of minimizing capacity properties which are reduced when the cycle properties are improved, and also capable of coping with changes in the composition, ...
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