{
  "$type": "site.standard.document",
  "description": "According to one embodiment, provided is a secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a niobium-titanium composite oxide having fluorine atoms on at least part of a surface the niobium-titanium composite oxide. An…",
  "path": "/patents/1300686",
  "publishedAt": "2021-09-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/131",
    "KABUSHIKI KAISHA TOSHIBA"
  ],
  "textContent": "According to one embodiment, provided is a secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a niobium-titanium composite oxide having fluorine atoms on at least part of a surface the niobium-titanium composite oxide. An abundance ratio Aof fluorine atoms, an abundance ratio Aof titanium atoms, and an abundance ratio Aof niobium atoms on a surface of the negative electrode according to X-ray photoelectron spectroscopy satisfy a relationship of 3.5≤A/(A+A)≤50.",
  "title": "SECONDARY BATTERY, BATTERY PACK, AND VEHICLE"
}