Positive electrode active material for secondary battery, and secondary battery comprising the same
AssigneeLG Chem, Ltd.
InventorsByung Chun Park, Wang Mo Jung, Seong Hoon Kang, Ju Kyung Shin, Sang Min Park, Sang Wook Lee
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Abstract
The present invention provides a positive electrode active material for a secondary battery, the positive electrode active material being a primary particle having a monolithic structure that includes a lithium composite metal oxide of Formula 1 below, wherein the primary particle has an average particle size (D50) of 2 μm to 20 μm and a Brunauer-Emmett-Teller (BET) specific surface area of 0.15 m2/g to 1.9 m2/g, and a secondary battery including the same.
Claims17
A positive electrode active material for a secondary battery, the positive electrode active material being a primary particle having a monolithic structure that includes a lithium composite metal oxide of Formula 1 below,
- wherein the primary particle has an average particle size (D50) of 2 μm to 20 μm and a Brunauer-Emmett-Teller (BET) specific surface area of 0.15 m2/g to 0.5 m2/g,
- wherein the lithium composite metal oxide is formed by sintering at 700° C. to 900° C. in the presence of a boron-based sintering additive:
- LiaNi1-x-yCoxM1yM3zM2wO2 [Formula 1]
- wherein, in Formula 1, M1 is Mn or combination of Mn and Al, M2 is any one or two elements selected from the group consisting of Zr and Mg, M3 is W, and 1.0≤a≤1.5, 0<x0.5, 0<y≤0.5, 0.005≤z<0.01, 0≤w≤0.04, 0<x+00.7.
Dependencies are inferred from the claim text.