{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "This application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and an apparatus containing such lithium-ion secondary battery. The positive electrode active material includes secondary particles and a…",
  "path": "/patents/1413682",
  "publishedAt": "2023-12-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G53/50",
    "CONTEMPORARY AMPEREX TECHNOLOGY CO LTD [CN]"
  ],
  "textContent": "This application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and an apparatus containing such lithium-ion secondary battery. The positive electrode active material includes secondary particles and a coating layer applied on an exterior surface of the secondary particle, where the secondary particle includes a lithium transition metal oxide that contains a doping element M, the coating layer includes an oxide of element M, M is selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and M is selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element M in the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle, and the number of primary particles contained in the outermost layer of the plurality of layers ranges from 5 per µm to 50 per µm.",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREFOR, AND LITHIUM ION SECONDARY BATTERY"
}