{
  "$type": "site.standard.document",
  "description": "To provide a means for further improving cycle durability in an electrical device such as a lithium ion secondary battery including a negative electrode containing a silicon-containing negative electrode active material. An electrical device has a power generating element including a unit cell…",
  "path": "/patents/934303",
  "publishedAt": "2016-11-30T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/052",
    "NISSAN MOTOR [JP]"
  ],
  "textContent": "To provide a means for further improving cycle durability in an electrical device such as a lithium ion secondary battery including a negative electrode containing a silicon-containing negative electrode active material. An electrical device has a power generating element including a unit cell layer containing a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on the surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a silicon-containing negative electrode active material is formed on the surface of a negative electrode current collector, and a separator. The electrical device is configured such that the one or more unit cell layers constituting the power generating element satisfy formula (1) : 0.91 ¤ C/A < 1 when the area of the negative electrode active material layer is A [m 2 ] and the area of the positive electrode active material layer is C [m 2 ].",
  "title": "ELECTRICAL DEVICE"
}