| abstract |
The present invention relates to a separator comprising an organic and inorganic mixture coating layer and a polyolefin-based porous separator having excellent heat resistance and adhesion to an electrode. Specifically, the present invention relates to a polyvinylidene fluoride homopolymer having a weight average molecular weight of 1,000,000 g / mol or more, a polyvinylidene fluoride-hexafluoropropylene copolymer having a weight average molecular weight of 800,000 g / mol or less, The present invention relates to a separator membrane coated with an organic and inorganic mixture, which is excellent in adhesion and thermal stability to suppress shorting of the anode and the cathode, and further improves the stability of the electrochemical cell using the same. |