{
  "$type": "site.standard.document",
  "description": "A positive electrode active material includes secondary particles. Each of the secondary particles includes primary particles. Each of the primary particles includes an olivine-type phosphate compound. A cross section of the secondary particle consists of a central portion and an outer peripheral…",
  "path": "/patents/1378033",
  "publishedAt": "2026-01-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/5825",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "A positive electrode active material includes secondary particles. Each of the secondary particles includes primary particles. Each of the primary particles includes an olivine-type phosphate compound. A cross section of the secondary particle consists of a central portion and an outer peripheral portion. A relationship of “0.8≤φ2/φ1” is satisfied. “φ1” represents a porosity of the central portion. “φ2” represents a porosity of the outer peripheral portion.",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL, ELECTRODE, AND BATTERY"
}