Patent ID: 11916229
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A positive electrode active material with a core-shell structure, comprising an inner core and a shell coating the inner core, wherein
the inner core comprises Li1+xMn1−yAyP1−zRzO4, wherein x is −0.100 to 0.100, y is 0.001 to 0.500, z is 0.001 to 0.100, A is one or more selected from Zn, Al, Na, K, Mg, Mo, W, Ti, V, Zr, Fe, Ni, Co, Ga, Sn, Sb, Nb, and Ge, optionally one or more of Fe, Ti, V, Ni, Co, and Mg, and R is one or more selected from B, Si, N, and S; and
the shell comprises a first coating layer coating the inner core, a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer, wherein
the first coating layer comprises a pyrophosphate of MP2O7 and a phosphate of XPO4, and M and X are each independently selected from one or more of Li, Fe, Ni, Mg, Co, Cu, Zn, Ti, Ag, Zr, Nb, and Al;
the second coating layer comprises carbon; and
the third coating layer comprises a polymer and the polymer comprises one or more selected from a polysiloxane with a linear structure and a polysiloxane with a cyclic structure.