abstract |
A long-life lithium ion secondary battery is provided. A lithium ion secondary battery comprising: (FSO2) 2NLi; an electrolytic solution containing a chain carbonate represented by the following general formula (A); and a negative electrode having a negative electrode active material, A lithium ion secondary battery, wherein a material having a major axis of 30 nm or more exists in a range of 0 / μm 2 or more and less than 80 / μm 2 on the surface of the negative electrode active material. R20OCOOR21 general formula (A) (R20 and R21 are each independently selected from CnHaFbClcBrdIe, which is a chain alkyl), or CmHfFgClhBriIj, which includes a cyclic alkyl in the chemical structure. N is an integer of 1 or more, and m is Integers of 3 or more, a, b, c, d, e, f, g, h, i, j are each independently integers of 0 or more and satisfy 2n + 1 = a + b + c + d + e and 2m = f + g + h + i + j. FIG. |