| 摘要 |
PROBLEM TO BE SOLVED: To provide: a composition for lithium ion secondary battery porous films which enables the manufacturing of a porous film capable of functioning as a separator having a high strength, and never causing an undesired phenomenon, such as gas generation in a lithium ion secondary battery and therefore, making possible to enhance the battery performances including low-temperature output and high-temperature cycle characteristics; such a porous film; and a secondary battery.SOLUTION: A composition for lithium ion secondary battery porous films comprises: non-conductive particles; a polymer including an acid group; and a carbodiimide compound. The total acid group amount measured in aqueous medium of the polymer including an acid group is 1-40 mmol to 100 g of the non-conductive particles. A porous film and a secondary battery are each arranged by use of the composition. |
