Separator for secondary battery, method for manufacturing the same and lithium secondary battery containing the same

A separator for a secondary battery comprising:

• (a) a porous substrate;
• and
• (b) a porous active layer formed by comprising a metal alkanoate having a polar group and particles including inorganic particles on one or both surfaces of the porous substrate,
• wherein the metal alkanoate having the polar group binds among the particles and also between the particles and the porous substrate, and
• wherein the metal alkanoate having the polar group has a structure represented by the following Chemical Formula 1:
• M(−OCOR)a [Chemical Formula 1]
• wherein M is any one selected from alkali earth metals, transition metals, Al, Ga, In, Sn, Pb, Ge, and Sb, R is a C1 to C10 substituted or unsubstituted alkyl group having the polar group, and a is an integer selected from 2 to 4.