| abstract |
(57) [Problem] To provide a practical lithium ion secondary battery which is thin, has high safety, and is excellent in charge / discharge characteristics. SOLUTION: In a lithium ion secondary battery including a positive electrode 1, a negative electrode 4, and a separator 7 for holding an electrolytic solution, an adhesive resin layer 8 for bonding the positive electrode 1, the separator 7 and the negative electrode 4 to the separator 7 is formed. , Polyvinylidene fluoride and an ion conductive polymer. |