{
  "$type": "site.standard.document",
  "description": "The present disclosure provides a negative electrode active material that can realize excellent low temperature characteristics. The negative electrode active material for a lithium ion secondary battery disclosed herein includes a carbon material that is able to reversibly occlude and release…",
  "path": "/patents/1407526",
  "publishedAt": "2026-06-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/583",
    "PRIME PLANET ENERGY & SOLUTIONS, INC."
  ],
  "textContent": "The present disclosure provides a negative electrode active material that can realize excellent low temperature characteristics. The negative electrode active material for a lithium ion secondary battery disclosed herein includes a carbon material that is able to reversibly occlude and release lithium ions and a carbon coating layer that is formed on a surface of the carbon material, and the carbon coating layer contains carbon atoms and phosphorus atoms. In addition, in the carbon coating layer, when a peak of a P2p spectrum measured by X-ray photoelectron spectroscopy (XPS) is subjected to waveform separation, there is a peak at a position at which a binding energy is 131 eV, and an intensity ratio (I/I) of a peak intensity Iat 1,580 cmto a peak intensity Iat 1,360 cmin a Raman spectrum is 0.4 or more and 0.7 or less.",
  "title": "Negative electrode active material and lithium ion secondary battery including negative electrode active material"
}