Patent ID: 11929499
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A lithium manganate positive electrode active material comprising a lithium manganate matrix and a cladding layer, wherein the cladding layer comprises an inner layer provided on the surface of the lithium manganate matrix, an interlayer provided on the surface of the inner layer, and an outer layer provided on the surface of the interlayer, wherein,
the inner layer comprises one or more of oxyacid salt of aluminum, calcium and/or magnesium, wherein
the oxyacid salt of aluminum, calcium and/or magnesium is selected from one or more of potassium aluminate, magnesium aluminate, calcium carbonate, calcium aluminate, magnesium carbonate, and magnesium aluminate;
the interlayer is an organic bonding material layer; and
the outer layer is an oxalate and/or silicate layer, wherein
the lithium manganate positive electrode active material has a multi-level pore structure with an average pore size of 15-20 nm and a porosity of 10-20%.