{
  "$type": "site.standard.document",
  "description": "In a cross section parallel to a thickness direction of a negative electrode active material layer, an average tortuosity ratio is 1.5 to 2.5. The average tortuosity ratio is calculated by the following formula: “R=B/A”. In the formula, “R” represents the average tortuosity ratio. “B” represents an…",
  "path": "/patents/1311090",
  "publishedAt": "2022-02-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M4/13",
    "Prime Planet Energy & Solutions, Inc."
  ],
  "textContent": "In a cross section parallel to a thickness direction of a negative electrode active material layer, an average tortuosity ratio is 1.5 to 2.5. The average tortuosity ratio is calculated by the following formula: “R=B/A”. In the formula, “R” represents the average tortuosity ratio. “B” represents an average value of lengths of shortest routes each extending from a contact point between a negative electrode substrate and a negative electrode active material particle to a surface of the negative electrode active material layer along contour lines of a plurality of negative electrode active material particles. “A” represents an average value of a thicknesses of the negative electrode active material layer.",
  "title": "Nonaqueous Electrolyte Secondary Battery"
}