Patent ID: 9660262
Date: 2017-05-23
CPC Classifications: H01M,Y02E

Claim:
1. A nonaqueous electrolyte secondary battery, comprising particles A of a lamellar type lithium transition metal oxide and particles B of a spinel type lithium transition metal oxide, as a positive active material, at a ratio within the range of A:B=20:80 to 80:20 (weight ratio), wherein a particle size distribution of the positive active material has a peak based on the particles A and a peak based on the particles B within the range of 1 to 50 μm, in a particle size distribution in terms of volume, a particle diameter A(D50) at a degree of accumulation of the particles A of 50% and a particle diameter B(D50) at a degree of accumulation of the particles B of 50% satisfy the following expression (1), and a particle diameter A(D95) at a degree of accumulation of the particles A of 95% and a particle diameter B(D5) at a degree of accumulation of the particles B of 5% satisfy the following expression (2): the particle diameter A(D50) at a degree of accumulation of the particles A of 50% is less than 5 μm, and the lamellar type lithium transition metal oxide is a lithium transition metal oxide represented by a general formula LiNi