{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core structure and a modified polymer coating layer coated on at least a part of the…",
  "path": "/patents/1424525",
  "publishedAt": "2022-12-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "CONTEMPORARY AMPEREX TECHNOLOGY CO LTD [CN]"
  ],
  "textContent": "The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core structure and a modified polymer coating layer coated on at least a part of the outer surface of the core structure, wherein the core structure comprises one or more of silicon-based materials and tin based materials; and wherein the negative active material has an infrared spectrum comprising an infrared absorption peak at the wavelength of 1450cm-1 to 1690cm-1, and the infrared absorption peak has a transmittance T that satisfies 80% ≤T≤99%.",
  "title": "NEGATIVE ACTIVE MATERIAL, PREPARATION METHOD THEREOF, SECONDARY BATTERY AND RELATED BATTERY MODULE, BATTERY PACK AND DEVICE"
}