{
  "$type": "site.standard.document",
  "description": "A positive electrode active material, a preparation method thereof, a positive electrode plate, a battery, and an electric device are provided. The positive electrode active material includes a core and a coating layer. The core includes a sodium-ion transition metal oxide containing the iron…",
  "path": "/patents/1381355",
  "publishedAt": "2026-04-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G49/0027",
    "CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED"
  ],
  "textContent": "A positive electrode active material, a preparation method thereof, a positive electrode plate, a battery, and an electric device are provided. The positive electrode active material includes a core and a coating layer. The core includes a sodium-ion transition metal oxide containing the iron element and/or nickel element. In the sodium-ion transition metal oxide, a molar amount of the iron element is denoted as b, a molar amount of the nickel is denoted as c, 0≤b≤0.4, and 0≤c≤0.4. The coating layer is disposed on at least a portion of a surface of the core, the coating layer contains an alkaline sodium compound, and based on a total mass of the positive electrode active material, a mass proportion of the alkaline sodium compound is w %, which satisfies:",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREOF, POSITIVE ELECTRODE PLATE, BATTERY, AND ELECTRIC DEVICE"
}