POSITIVE PLATE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTIC SECONDARY CELL AND NONAQUEOUS ELECTROLYTIC SECONDARY CELL CONTAINING THE SAME

摘要

The present invention relates to a positive electrode active material for a nonaqueous electrolyte secondary battery and a nonaqueous electrolyte secondary battery using the same. The positive electrode active material for a nonaqueous electrolyte secondary battery is Li _x M _y Sn _z O ₂ (M is Co, Ni, Mn, Fe, V, etc.). And a transition metal (especially Co or Ni) of, substantially Li-containing transition metal composite oxide having a composition represented by 0.9≤x≤1.15, 0.85≤y≤1.00, 0 z 0.01, and such a positive electrode active material It is excellent in controllability of particle diameter (fineness and sharpening of particle size distribution), and does not cause an increase in battery internal pressure. A nonaqueous electrolyte secondary battery includes a positive electrode, a separator and a negative electrode, a battery container in which they are housed, and a nonaqueous electrolyte filled in a battery container. The positive electrode contains a positive electrode active material for a nonaqueous electrolyte secondary battery represented by the above formula. According to the nonaqueous electrolyte secondary battery, it is possible to improve charge and discharge characteristics, temperature characteristics, and the like, and to improve reliability and safety.