Abstract: Provided are a lithium battery and a manufacturing method therefor, the lithium battery comprising: a cathode; an anode; and a separator interposed between the cathode and the anode and including a porous substrate and an adhesive layer, wherein the adhesive layer of the separator contains ceramic particles and a binder at a mixing weight ratio of 4:6 to 6:4, the binder is a polyvinylidene fluoride-based compound, the binder includes a first binder and a second binder, and the adhesion ratio of the lithium battery, which is represented by equation 1 below, is 0.05 to 1.0. adhesion ratio={(dry adhesion?10)/(wet adhesion?350)}??<Equation 1> In equation 1, dry adhesion and wet adhesion are as defined in the detailed description.

Abstract: A separator for a rechargeable battery includes a porous substrate; and a coating layer on the porous substrate, the coating layer includes a fluorine-containing binder, a filler, and an additive, the additive is included in an amount of 0.35 wt % to 1.25 wt %, an infrared spectral intensity of a C-F group of the fluorine-containing binder is greater than 0.0030 to less than 0.0050, the infrared spectral intensity of the C-F group of the fluorine-containing binder is measured as a functional group of the fluorine-containing binder to evaluate a distribution of the fluorine-containing binder when separator specimens are mounted on an ATR crystal of a FT-IR spectroscopy and infrared rays are entered at a 45 degree angle, the additive includes a hydrocarbon polymer compound that includes a carboxyl group, and the hydrocarbon polymer compound has a weight average molecular weight of about 5,000 g/mol to about 15,000 g/mol.

Abstract: A separator for a rechargeable battery, a method of preparing a separator, and a rechargeable lithium battery, the separator including a porous substrate; and at least one coating layer on one surface of the porous substrate, wherein the coating layer includes a fluorine-containing binder, a filler, and an additive, the fluorine-containing binder has a concentration gradient in which a concentration thereof in the coating layer increases toward an outer surface of the separator in a thickness direction of the separator, an infrared spectral intensity of a C—F group of the fluorine-containing binder is greater than 0.0030 to less than 0.0050, the additive is a hydrocarbon polymer compound that includes a carboxyl group, and a weight average molecular weight of the hydrocarbon polymer compound is about 5,000 g/mol to about 15,000 g/mol.

Abstract: A separator for a rechargeable battery, a method of preparing a separator, and a rechargeable lithium battery, the separator including a porous substrate; and at least one coating layer on one surface of the porous substrate, wherein the coating layer includes a fluorine-containing binder, a filler, and an additive, the fluorine-containing binder has a concentration gradient in which a concentration thereof in the coating layer increases toward an outer surface of the separator in a thickness direction of the separator, an infrared spectral intensity of a C-F group of the fluorine-containing binder is greater than 0.0030 to less than 0.0050, the additive is a hydrocarbon polymer compound that includes a carboxyl group, and a weight average molecular weight of the hydrocarbon polymer compound is about 5,000 g/mol to about 15,000 g/mol.