| abstract |
[PROBLEMS] To provide a porous separator for a non-aqueous electrolyte secondary battery excellent in heat removal performance and excellent heat removal characteristics using this separator, with little temperature rise during charge / discharge, etc., and high safety. A non-aqueous electrolyte secondary battery is provided. A porous separator for a non-aqueous electrolyte secondary battery having a thermal conductivity in the thickness direction of 0.5 W / (m ยท K) or more. A non-aqueous electrolyte secondary battery comprising a negative electrode and a positive electrode capable of inserting and extracting lithium, a non-aqueous electrolyte containing a non-aqueous solvent and a lithium salt, and the porous separator. |