| abstract |
The present invention relates to a positive electrode active material, a negative electrode active material and an electrolyte used alone or in combination, which can improve the charge-discharge cycle characteristics, low temperature characteristics and stability of a nonaqueous electrolyte secondary battery, specifically a lithium ion secondary battery. It is about. In particular, a particulate Li-transition metal composite oxide having an average particle size of 10 µm or more and satisfying the formula [20 / (specific surface area × average particle size)] = 7 to 9 is used as the positive electrode active material. |