Abstract: Proposed is a cathode for a secondary battery, which includes a cathode collector and a cathode mixture layer on the cathode collector, includes: a coating section at which the cathode mixture layer is formed with a uniform thickness; a non-coating section that is disposed on at least one edge of the coating section on the cathode collector and at which the cathode mixture layer is not formed; and a cushioning section at which the cathode mixture layer is formed with a thickness smaller than a thickness of the coating section at a location between the coating section and the non-coating section.

Abstract: The present disclosure relates to a multilayer negative electrode comprising a negative electrode current collector configured to transfer electrons between an outer lead and a negative electrode active material, a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and containing natural graphite as a negative electrode active material and a second negative electrode mixture layer formed on the first negative electrode mixture layer and containing artificial graphite as a negative electrode active material, and a lithium secondary battery including the same.

Abstract: The present disclosure relates to a multilayer negative electrode comprising a negative electrode current collector configured to transfer electrons between an outer lead and a negative electrode active material, a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and containing natural graphite as a negative electrode active material and a second negative electrode mixture layer formed on the first negative electrode mixture layer and containing artificial graphite as a negative electrode active material, and a lithium secondary battery including the same.

Abstract: An electrode for a secondary battery, the electrode including a current collector and an electrode active material layer disposed on at least one surface of the current collector. The electrode satisfies t2?t1?8×t2, where t1 is a thickness of the electrode active material layer excluding the current collector on the side close to the current collector based on a separated position within the electrode active material layer when a 90° bending adhesive strength of the electrode is measured, and t2 is a particle size (D50) of an electrode active material included in the electrode active material layer.

Abstract: Provided is an electrode for a secondary battery, a method of manufacturing the same, and a secondary battery including the electrode.

Abstract: Provided is an electrode for a secondary battery, a method of manufacturing the same, and a secondary battery including the electrode.

Abstract: Disclosed is a coating apparatus for producing an electrode, which has a reduced defect rate in the coating process. The coating apparatus includes a die unit having an inlet through which the electrode slurry is introduced and an inner space for accommodating the introduced electrode slurry; a shim unit mounted in the die unit and configured to form an outlet together with the die unit so that the electrode slurry is discharged therethrough; and a cover member configured to surround an outer surface of the die unit and the shim unit so that the electrode slurry is not leaked at the outer surface, except for the outlet.

Abstract: A cathode slurry for a lithium secondary battery according to exemplary embodiments may include a cathode active material including lithium metal oxide particles, a binder, a dispersion medium, and at least one of a multivalent carboxylic acid compound and a salt of the multivalent carboxylic acid compound. A total amount of the multivalent carboxylic acid compound and the salt of the multivalent carboxylic acid compound in the cathode slurry may be 0.01 to 0.05 wt. parts based on 100 wt. parts of the lithium metal oxide particles.

Abstract: The present disclosure relates to a strip-like electrode for use in a cylindrical jelly roll which includes a strip-like electrode assembly wound cylindrically to form a hollow cavity at the core portion thereof, and a lithium secondary battery including the same. The strip-like electrode includes: a strip-like electrode current collector; a first electrode active material layer formed on at least one surface of the strip-like electrode current collector; and a second electrode active material layer formed on the first electrode active material layer, wherein the second electrode active material layer is formed to have a length smaller than the length of the first electrode active material layer so that a part of one longitudinal surface of the first electrode active material layer can be exposed to the outside.

Abstract: The present disclosure relates to a multilayer negative electrode comprising a negative electrode current collector configured to transfer electrons between an outer lead and a negative electrode active material, a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and containing natural graphite as a negative electrode active material and a second negative electrode mixture layer formed on the first negative electrode mixture layer and containing artificial graphite as a negative electrode active material, and a lithium secondary battery including the same.

Abstract: A method for manufacturing an electrode having an irregular shape through a simple process while minimizing the amount of wasted electrode active material is provided. The method results in first to third coating areas formed to be spaced apart from each other on a collector, a plurality of fourth coating areas formed between the first coating area and the second coating area, and a plurality of fifth coating areas formed between the second coating area and the third coating area. The plurality of fourth coating areas and the plurality of fifth coating areas are dislocated from each other when viewed from one side in a width direction of the collector.

Abstract: Proposed is a cathode for a secondary battery, which includes a cathode collector and a cathode mixture layer on the cathode collector, includes: a coating section at which the cathode mixture layer is formed with a uniform thickness; a non-coating section that is disposed on at least one edge of the coating section on the cathode collector and at which the cathode mixture layer is not formed; and a cushioning section at which the cathode mixture layer is formed with a thickness smaller than a thickness of the coating section at a location between the coating section and the non-coating section.

Abstract: Provided is an electrode for a secondary battery, a method of manufacturing the same, and a secondary battery including the electrode.

Abstract: Disclosed is a coating apparatus for producing an electrode, which has a reduced defect rate in the coating process. The coating apparatus includes a die unit having an inlet through which the electrode slurry is introduced and an inner space for accommodating the introduced electrode slurry; a shim unit mounted in the die unit and configured to form an outlet together with the die unit so that the electrode slurry is discharged therethrough; and a cover member configured to surround an outer surface of the die unit and the shim unit so that the electrode slurry is not leaked at the outer surface, except for the outlet.

Abstract: Disclosed is a coating apparatus for producing an electrode, which has a reduced defect rate in the coating process. The coating apparatus includes a die unit having an inlet through which the electrode slurry is introduced and an inner space for accommodating the introduced electrode slurry; a shim unit mounted in the die unit and configured to form an outlet together with the die unit so that the electrode slurry is discharged therethrough; and a cover member configured to surround an outer surface of the die unit and the shim unit so that the electrode slurry is not leaked at the outer surface, except for the outlet.

Abstract: A multi-layer negative electrode according to an embodiment of the present disclosure includes: a current collector configured to transmit electrons between an outer lead and a negative electrode active material; a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and including a first negative electrode active material and a first binder; and a second negative electrode mixture layer formed on the first negative electrode mixture layer and including a second negative electrode active material, wherein the first negative electrode mixture layer has an electrode density of about 0.9 to 2.0 g/cc and the second negative electrode mixture layer has an electrode density of about 0.2 to 1.7 g/cc, which is a range lower than that of the electrode density of the first negative electrode mixture layer. The multi-layer negative electrode can be included in a lithium secondary battery.

Abstract: Disclosed is a coating apparatus for producing an electrode, which has a reduced defect rate in the coating process. The coating apparatus includes a die unit having an inlet through which the electrode slurry is introduced and an inner space for accommodating the introduced electrode slurry; a shim unit mounted in the die unit and configured to form an outlet together with the die unit so that the electrode slurry is discharged therethrough; and a cover member configured to surround an outer surface of the die unit and the shim unit so that the electrode slurry is not leaked at the outer surface, except for the outlet.

Abstract: A method for manufacturing an electrode having an irregular shape through a simple process while minimizing the amount of wasted electrode active material is provided. The method results in first to third coating areas formed to be spaced apart from each other on a collector, a plurality of fourth coating areas formed between the first coating area and the second coating area, and a plurality of fifth coating areas formed between the second coating area and the third coating area. The plurality of fourth coating areas and the plurality of fifth coating areas are dislocated from each other when viewed from one side in a width direction of the collector.

Abstract: The present disclosure relates to a strip-like electrode for use in a cylindrical jelly roll which includes a strip-like electrode assembly wound cylindrically to form a hollow cavity at the core portion thereof, and a lithium secondary battery including the same. The strip-like electrode includes: a strip-like electrode current collector; a first electrode active material layer formed on at least one surface of the strip-like electrode current collector; and a second electrode active material layer formed on the first electrode active material layer, wherein the second electrode active material layer is formed to have a length smaller than the length of the first electrode active material layer so that a part of one longitudinal surface of the first electrode active material layer can be exposed to the outside.

Abstract: A method for manufacturing an electrode for a rechargeable battery includes, with reference to a center axis that divides a metal sheet left and right, setting a first coating line that is parallel with the center axis at a location deflected to one side, and a second coating line that is parallel with the center axis at a location deflected to the other side so as to correspond to the first coating line with reference to the virtual center axis and coating an electrode slurry on the metal sheet while alternately moving a slot die to the first coating line and the second coating line.