{
  "$type": "site.standard.document",
  "description": "A positive electrode active material comprising a plurality of secondary particles (2, 2a), wherein: each of the secondary particles (2, 2a) includes a plurality of primary particles (1); each of the primary particles (1) contains an olivine-type phosphate compound; carbon is attached to at least…",
  "path": "/patents/1427053",
  "publishedAt": "2026-06-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0525",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A positive electrode active material comprising a plurality of secondary particles (2, 2a), wherein: each of the secondary particles (2, 2a) includes a plurality of primary particles (1); each of the primary particles (1) contains an olivine-type phosphate compound; carbon is attached to at least part of a surface of the primary particle (1); a cross-sectional surface of the secondary particle (2, 2a) includes a central portion (3a) and a peripheral portion (3b); and a relationship of 0.5 ≤ I/I is satisfied where I is an average value of signal intensities of carbon in the central portion (3a) in TEM-EDS line analysis along a diametrical direction of the secondary particle (2, 2a), and I is an average value of signal intensities of carbon in the peripheral portion (3b) in TEM-EDS line analysis along the diametrical direction of the secondary particle (2, 2a).",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL, BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL"
}