{
  "$type": "site.standard.document",
  "description": "An object is to provide a positive electrode active material having a high discharge capacity in an all-solid-state lithium ion secondary battery. [0002] The positive electrode active material for an all-solid-state lithium ion secondary battery includes a lithium-transition metal composite oxide…",
  "path": "/patents/1427524",
  "publishedAt": "2026-06-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G53/00",
    "SUMITOMO METAL MINING CO [JP]"
  ],
  "textContent": "An object is to provide a positive electrode active material having a high discharge capacity in an all-solid-state lithium ion secondary battery. [0002] The positive electrode active material for an all-solid-state lithium ion secondary battery includes a lithium-transition metal composite oxide including a secondary particle including a plurality of primary particles being aggregated and includes a coating layer coating a surface of the secondary particle, the lithium-transition metal composite oxide contains lithium and nickel and optionally contains cobalt and an element M being an additive element other than lithium, nickel, cobalt, and oxygen, the coating layer contains a compound containing at least lithium and tungsten, the surface of the secondary particle is coated with tungsten at a percentage of coverage of 30% or more and 95% or less, and the percentage of coverage is represented by P (%) and calculated using XPS analysis with (Formula 1) described below. P = W / W + Ni + Co + M × 100 %",
  "title": "POSITIVE-ELECTRODE ACTIVE MATERIAL FOR ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERIES, AND ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERY"
}