{
  "$type": "site.standard.document",
  "description": "The present invention relates to a positive electrode active material for a lithium ion secondary battery, including: lithium-nickel-manganese composite oxide particles having a layered hexagonal crystal system, wherein, the lithium-nickel-manganese composite oxide is represented by the following…",
  "path": "/patents/1421324",
  "publishedAt": "2025-09-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G53/50",
    "SUMITOMO METAL MINING CO [JP]"
  ],
  "textContent": "The present invention relates to a positive electrode active material for a lithium ion secondary battery, including: lithium-nickel-manganese composite oxide particles having a layered hexagonal crystal system, wherein, the lithium-nickel-manganese composite oxide is represented by the following general formula: Li1+tNiaMnbMcMgdO2+α (1)in which an element M in the general formula (1) is at least one element selected from Co, Ti, W, B, Mo, V, Nb, Ca, Al, Cr, Zr, and Ta; -0.05≤t≤0.2, 0.50≤a≤0.95, 0.03≤b≤0.40, 0.02≤c≤0.40, 0.0005≤d≤0.05, a+b+c+d=1.0, and 0≤α≤0.5; wherein the lithium-nickel-manganese composite oxide particles contains secondary particles formed by aggregation of primary particles of the lithium-nickel-manganese composite oxide particles, and wherein lattice constants a and c of the lithium-nickel-manganese composite oxide as determined by an X-ray diffraction method are 2.8640Å≤a≤2.8750Å and 14.195Å≤c≤14.225Å.",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY"
}