NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A nonaqueous electrolyte secondary battery has both high capacity and high regeneration. A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a Ni-containing lithium transition metal oxide having a layered structure and also contains a tungsten compound and/or a molybdenum compound. The percentage of Ni is greater than 90 mole percent with respect to the molar amount of the lithium transition metal oxide. The amount of the compound is 0.1 mole percent to 1.5 mole percent with respect to the molar amount of the lithium transition metal oxide in terms of tungsten element and/or molybdenum element.

主权项

1. A nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte,
wherein the positive electrode contains a lithium transition metal oxide, having a layered structure, containing at least Ni and also contains a tungsten compound and/or a molybdenum compound; the percentage of Ni is greater than 90 mole percent with respect to the sum of the molar amounts of metal elements, excluding lithium, in die lithium transition metal oxide; and the amount of the tungsten compound and/or the molybdenum compound is 0.1 mole percent to 1.5 mole percent with respect to the sum of the molar amounts of the metal elements, excluding lithium, in the lithium transition metal oxide in terms of tungsten element and/or molybdenum element.