| 摘要 |
Provided is a non-aqueous electrolyte secondary cell capable of satisfying, in a well-balanced manner, standards for input characteristics, safety, and storage durability. A lithium-ion secondary cell (100) provided with a wound electrode body (55) formed by winding a positive electrode (10) and a negative electrode (20) with a separator (30) interposed therebetween, and an electrolytic solution provided between the positive electrode (10) and the negative electrode (20), a negative electrode mixture layer (22) containing a negative electrode active material being formed on the surface of the negative electrode (20), the average particle diameter of the negative electrode active material being 5 to 20 mum, and the fine powder amount (P), which is the cumulative frequency of the negative electrode active material having a particle diameter (D) no greater than 3 mum, being 10 to 50%. The electrolytic solution contains 0.1 to 0.4 M of an oxalatoborate type compound and 0.06 M or more of a difluorophosphate compound. |
