| 摘要 |
The nonaqueous electrolyte secondary battery according to the invention includes: a positive electrode containing a Mn-based active material having an average particle size of 12 µm or more and 30 µm or less, which is represented by a general formula Li a Mn 2 - b AbO 4 and a three-component active material having an average particle size of 0.5 µm or more and 7 µm or less, which is represented by a general formula Li d Ni x Co y Mn z M ± O 2 ; and a negative electrode containing 50 mass% or more of a negative active material having an average particle size of 3 µm or more and 18 µm or less, and the mass mixing ratio between the Mn-based active material and the three-component active material meets the mass of the Mn-based active material : the mass of the three-component active material = 20 : 80 to 80 : 20. Thus, even when the battery causes internal short circuit, it is possible to adequately keep the battery from falling into any abnormal condition. |
