Patent ID: 11949093
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 0:
1. A positive active material, wherein
the positive active material is LixNiyCozMkMepOrAm or LixNiyCozMkMepOrAm whose surface is provided with a coating layer, wherein 0.85≤x≤1.15, 0<y<1, 0<z<1, 0<k<1, 0≤p≤0.1, 1≤r≤2, 0≤m≤1, m+r≤2, M is one or two selected from Mn and Al, Me is one or more selected from Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, and Nb, and A is one or more selected from N, F, S, and Cl; and
the positive active material is secondary particles, a particle size Dn10 of the positive active material satisfies: 0.5 μm≤Dn10≤3 μm, a particle size Dv10 of the positive active material is 2.5 μm to 8 μm, and Dn10 and Dv10 satisfy 1≤Dn10×Dv10≤20, wherein
Dn10 is a corresponding particle size when a cumulative number distribution percentage of the positive active material reaches 10%, and
Dv10 is a corresponding particle size when a cumulative volume distribution percentage of the positive active material reaches 10%.