{
  "$type": "site.standard.document",
  "description": "Disclosed is a positive electrode active material which is used in a nonaqueous electrolyte secondary battery (10), and which is characterized by having a crystal structure belonging to the space group R-3m, and being represented by composition formula LiNaNiMnXO. In the formula, X represents at…",
  "path": "/patents/1390406",
  "publishedAt": "2026-06-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C01G53/00",
    "PANASONIC IP MAN CO LTD [JP]"
  ],
  "textContent": "Disclosed is a positive electrode active material which is used in a nonaqueous electrolyte secondary battery (10), and which is characterized by having a crystal structure belonging to the space group R-3m, and being represented by composition formula LiNaNiMnXO. In the formula, X represents at least one element that is selected from the group consisting of transition metal elements other than Li, Na, Ni, and Mn and typical elements, 0.80 ≤ x ≤ 1.15, 0 < y ≤ 0.20, 0.80 < x + y ≤ 1.20, 0 < 1 - a - b ≤ 1, 0 ≤ a < 1, 0 ≤ b < 1, and c is a value that satisfies electrical neutrality. The positive electrode active material is also characterized in that, in the dQ/dV curve that is obtained when the nonaqueous electrolyte secondary battery (10) is initially charged, the voltage has a peak within the range of 4.2 V to 4.4 V inclusive, and the half-value width of the peak is 0.11 V or less.",
  "title": "POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL"
}