| 摘要 |
PROBLEM TO BE SOLVED: To make the service life of a nonaqueous electrolyte secondary battery longer.SOLUTION: Disclosed is a nonaqueous electrolyte secondary battery, comprising: a positive electrode including a positive electrode collector and a positive electrode mixture layer formed on the positive electrode collector; and a negative electrode including a negative electrode collector and a negative electrode mixture layer formed on the negative electrode collector, the positive and the negative electrodes being laminated, the positive electrode mixture layer containing a positive electrode active material, the negative electrode mixture layer containing a negative electrode active material. As an area in the positive electrode has higher temperature, the amount of the active material per a unit volume contained in the positive electrode collector in the positive electrode mixture layer in the area is greater. As an area in the negative electrode has higher temperature, the amount of the active material per a unit volume contained in the negative electrode collector in the negative electrode mixture layer in the area is greater. |
