Separator including coating layer of organic and inorganic mixture, and battery including the same

Disclosed herein is a separator for batteries. The separator includes a coating layer of an organic and inorganic mixture containing a polyvinylidene fluoride homopolymer, a polyvinylidene fluoride-hexafluoropropylene copolymer, a solvent, and inorganic particles, wherein the solvent remains in an amount of 100 ppm or less in the coating layer. In the separator, the coating layer having excellent adhesion and heat dissipation is strongly attached to a base film, thereby achieving efficient suppression of thermal shrinkage of the separator. Further, the present invention also discloses an electrochemical battery, to which the separator exhibiting excellent adhesion and capable of suppressing thermal shrinkage is applied to prevent short circuit of electrodes due to overheating, thereby improving stability and lifespan.