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US 10,483,537 B2Granted
Positive active material and method for producing the same
AssigneeEcopro Bm Co., Ltd.
InventorsMoon Ho Choi, Jik Soo Kim, Jin Kyeong Yun, Suk Yong Jeon, Jae Yong Jung, Suk Whan Lee
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Abstract
The present invention relates to a positive active material and a method for producing same and, more specifically, to a positive active material comprising LiAlO2 at the surface thereof as a result of reacting an Al compound with residual lithium and to a method for producing same.
Claims4
A method for producing a positive active material comprising LiAlO2 in a surface and being given in Formula 1 that is Li1+aNibM1cM2dO2, comprising:
- preparing the positive active material;
- preparing a washing solution in uniform temperature;
- agitating the positive active material in the washing solution;
- drying the washed positive active material;
- and
- mixedly agitating the positive active material with a compound including Al,
- where
- 0.95≥b≥0.75,
- a+b+c=1,
- M1 is one or more selected from a group of Co, B, Ba, Cr, F, Li, Mo, P, Sr, Ti, and Zr, and
- M2 is one or more selected from a group of Mn, Al, B, Ba, Cr, F, Li, Mo, P, Sr, Ti, and Zr.
8 more elements
Dependencies are inferred from the claim text.