Abstract: The carrier-foil-attached ultra-thin copper foil according to one embodiment of the present invention comprises a carrier foil, a release layer, a first ultra-thin copper foil, a Cu—Al bonding strength improvement layer, an Al layer, and a second ultra-thin copper foil, wherein the release layer may comprise a first metal (A3) having peeling properties, and a second metal (B3) and third metal (C3) facilitating the plating of the first metal (A3).

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, having excellent physical properties at a low temperature, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery shows little change in the physical properties, such as tensile strength and elongation, of a copper foil even at a low temperature and thereby exhibits excellent cycle properties at the low temperature. The electrolytic copper foil for a secondary battery is produced from a plating solution, containing total organic carbon (TOC), cobalt, iron and zinc, by using a drum and coated with a cathode active material, wherein the ratio between the TOC, cobalt, iron and zinc contained in the electrolytic copper foil follows the following formula 1: TOC/(cobalt+iron+zinc)=1.0-1.2.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, and a method of producing the same. The electrolytic copper foil for a secondary battery exhibits a little change in a physical property caused by a difference in a crosshead speed when tensile strength and an elongation percentage of the electrolytic copper foil are measured, thereby achieving excellent charging and discharging characteristics of a battery and preventing exfoliation of an active material. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), cobalt, and iron by using a drum, in which a ratio of the TOC to the cobalt and the iron contained in the electrolytic copper foil follows Formula 1 below. TOC/(cobalt+iron)=1.3 to 1.

Abstract: The carrier-foil-attached ultra-thin copper foil according to one embodiment of the present invention comprises a carrier foil, a release layer, a first ultra-thin copper foil, a Cu—Al bonding strength improvement layer, an Al layer, and a second ultra-thin copper foil, wherein the release layer may comprise a first metal (A3) having peeling properties, and a second metal (B3) and third metal (C3) facilitating the plating of the first metal (A3).

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, having excellent flexural resistance, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery has excellent flexural resistance even without the use of many additives in a copper electrolyte when producing a copper foil. The electrolytic copper foil for a secondary battery according to the present invention is an electrolytic copper foil for a secondary battery, which is produced from a plating solution, containing total organic carbon (TOC), cobalt and arsenic, by using a drum and is coated with a negative electrode active material, wherein the ratio between the TOC, cobalt and arsenic contained in the electrolytic copper foil follows the following formula 1: TOC/(cobalt+arsenic)=1.30-1.55.

Abstract: Disclosed herein are a surface-treated copper foil for a negative electrode current collector for secondary batteries, a method for producing the same, and a negative electrode for secondary batteries including the same. The surface-treated copper foil includes needle-shaped copper particles formed on at least one surface thereof, wherein the copper particles have an average major-axis length of about 0.6 ?m to about 2.0 ?m and are separated from one another by a distance of about 1 ?m to about 5 ?m.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery and a method of producing the same, and more particularly, to an electrolytic copper foil for a secondary battery, which has little change in a physical property of a copper foil before and after vacuum drying in a process of producing an electrolytic copper foil, thereby exhibiting excellent cycle life in a battery test at a high-density negative electrode, and preventing cracking. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), zinc, and iron by using a drum, in which a ratio of the TOC to the zinc and the iron contained in the electrolytic copper foil follows Formula 1 below: TOC/(zinc+iron)=1.3 to 1.5.

Abstract: Provided is an electrolytic nickel foil including, on at least one surface thereof, a flat surface having the following surface roughness: a Ra of 0.05 ?m or less, a Rz of 0.2 ?m or less, and a Rt of 0.5 ?m or less and a glossiness of 200 GU or more as determined by measuring a 60° specular reflection angle.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery and a method of producing the same, and more particularly, to an electrolytic copper foil for a secondary battery, which has little change in a physical property of a copper foil before and after vacuum drying in a process of producing an electrolytic copper foil, thereby exhibiting excellent cycle life in a battery test at a high-density negative electrode, and preventing cracking. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), zinc, and iron by using a drum, in which a ratio of the TOC to the zinc and the iron contained in the electrolytic copper foil follows Formula 1 below: TOC/(zinc+iron)=1.3 to 1.

Abstract: The present disclosure provides an electrolytic copper foil composed of a single layer or a stack of two or more layers, wherein the electrolytic copper foil has Total Organic Carbon (TOC) content equal to or smaller than 4 ppm, and has chlorine (Cl) content equal to or smaller than 10 ppm, wherein the electrolytic copper foil has a thickness, a tensile strength, and an elongation satisfying a relationship 1 below: relationship 1: thickness (?m)/(tensile strength (kgf/mm2)*elongation (%))?0.1.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, and a method of producing the same. The electrolytic copper foil for a secondary battery exhibits a little change in a physical property caused by a difference in a crosshead speed when tensile strength and an elongation percentage of the electrolytic copper foil are measured, thereby achieving excellent charging and discharging characteristics of a battery and preventing exfoliation of an active material. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), cobalt, and iron by using a drum, in which a ratio of the TOC to the cobalt and the iron contained in the electrolytic copper foil follows Formula 1 below. TOC/(cobalt+iron)=1.3 to 1.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, having excellent physical properties at a low temperature, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery shows little change in the physical properties, such as tensile strength and elongation, of a copper foil even at a low temperature and thereby exhibits excellent cycle properties at the low temperature. The electrolytic copper foil for a secondary battery is produced from a plating solution, containing total organic carbon (TOC), cobalt, iron and zinc, by using a drum and coated with a negative electrode active material, wherein the ratio between the TOC, cobalt, iron and zinc contained in the electrolytic copper foil follows the following formula 1: TOC/(cobalt+iron+zinc)=1.0-1.2.

Abstract: The carrier-foil-attached ultra-thin copper foil according to one embodiment of the present invention comprises a carrier foil, a release layer, a first ultra-thin copper foil, an Al layer, and a second ultra-thin copper foil, wherein the release layer may comprise a first metal (A1) having peeling properties, and a second metal (B1) and third metal (C1) facilitating the plating of the first metal (A1).

Abstract: The carrier-foil-attached ultra-thin copper foil according to one embodiment of the present invention comprises a carrier foil, a release layer, a first ultra-thin copper foil, a Cu-diffusion prevention layer, an Al layer, and a second ultra-thin copper foil, wherein the release layer may comprise a first metal (A2) having peeling properties, and a second metal (B2) and third metal (C2) facilitating the plating of the first metal (A2).

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, having excellent flexural resistance, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery has excellent flexural resistance even without the use of many additives in a copper electrolyte when producing a copper foil. The electrolytic copper foil for a secondary battery according to the present invention is an electrolytic copper foil for a secondary battery, which is produced from a plating solution, containing total organic carbon (TOC), cobalt and arsenic, by using a drum and is coated with a negative electrode active material, wherein the ratio between the TOC, cobalt and arsenic contained in the electrolytic copper foil follows the following formula 1: TOC/(cobalt+arsenic)=1.30?1.55.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery and a method of producing the same. The electrolytic copper foil for a secondary battery, in which a burr and curl of a negative electrode plate are inhibited from being formed after an electrolytic copper foil is coated with a negative electrode active material, thereby increasing the loading volume of a negative electrode and increasing a capacity. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC) by using a drum, in which the electrolytic copper foil is formed of one surface that is in direct contact with the drum and the other surface that is an opposite surface of the one surface, and an average cross-sectional grain size of the one surface is 80% or less of an average cross-sectional grain size of the other surface.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, and a method of producing the same. The electrolytic copper foil for a secondary battery exhibits a little change in a physical property caused by a difference in a crosshead speed when tensile strength and an elongation percentage of the electrolytic copper foil are measured, thereby achieving excellent charging and discharging characteristics of a battery and preventing exfoliation of an active material. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), cobalt, and iron by using a drum, in which a ratio of the TOC to the cobalt and the iron contained in the electrolytic copper foil follows Formula 1 below. TOC/(cobalt+iron)=1.3 to 1.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, having excellent flexural resistance, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery has excellent flexural resistance even without the use of many additives in a copper electrolyte when producing a copper foil. The electrolytic copper foil for a secondary battery according to the present invention is an electrolytic copper foil for a secondary battery, which is produced from a plating solution, containing total organic carbon (TOC), cobalt and arsenic, by using a drum and is coated with a cathode active material, wherein the ratio between the TOC, cobalt and arsenic contained in the electrolytic copper foil follows the following formula 1: TOC/(cobalt+arsenic)=1.30?1.55.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery, having excellent physical properties at a low temperature, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery shows little change in the physical properties, such as tensile strength and elongation, of a copper foil even at a low temperature and thereby exhibits excellent cycle properties at the low temperature. The electrolytic copper foil for a secondary battery is produced from a plating solution, containing total organic carbon (TOC), cobalt, iron and zinc, by using a drum and coated with a cathode active material, wherein the ratio between the TOC, cobalt, iron and zinc contained in the electrolytic copper foil follows the following formula 1: TOC/(cobalt+iron+zinc)=1.0-1.2.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery and a method of producing the same, and more particularly, to an electrolytic copper foil for a secondary battery, which has little change in a physical property of a copper foil before and after vacuum drying in a process of producing an electrolytic copper foil, thereby exhibiting excellent cycle life in a battery test at a high-density negative electrode, and preventing cracking. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), zinc, and iron by using a drum, in which a ratio of the TOC to the zinc and the iron contained in the electrolytic copper foil follows Formula 1 below: TOC/(zinc+iron)=1.3 to 1.5.