| abstract |
(57) [Summary] (Modified) [Problem] Instead of incorporating a separately manufactured protection circuit, a self-contained method using the original mechanism of the battery is used. Improve the safety of non-aqueous electrolyte secondary batteries. SOLUTION: In a non-aqueous electrolyte secondary battery having lithium as a main active material and having a separator, the separator has a through hole through which a lithium dendrite is inserted, a diameter of 5 μm or more and 100 μm or less, and a positive and negative electrode. On at least one electrode surface, a gel-like polymer layer containing an electrolytic solution, for example, polyvinylidene fluoride, It has a structure in which polymers such as polyethylene oxide, polyacrylonitrile, and polymethyl methacrylate are arranged. |