| abstract |
A non-aqueous electrolyte secondary battery comprising a spacer comprising a polyolefin porous film, a porous layer comprising a polyvinylidene fluoride-based resin, a positive electrode plate, and a negative electrode plate, and the sum of the interface barrier energies is a predetermined value, The polyolefin porous film has a predetermined puncture strength, the value represented by the following formula (1) is 0.00 or more and 0.54 or less, |1-T/M|...(1), the α of the polyvinylidene fluoride-based resin The content of the type crystals is 35.0 mol% or more. |