Provided is a current collector electrode sheet (10) including a slurry application area (11) formed by intermittently applying and drying a slurry containing an active material and a non-application area (12), on both surfaces of a metal foil (9), in which the application area (11) and the non-application area (12) are alternately formed in a winding direction of the metal foil (9) having a strip shape, and, in a compression step of continuously compressing the slurry application area (11) and the non-application area (12) using a pair of compression rollers in a thickness direction of the current collector electrode sheet (10), an area which is not compressed by the compression rollers, is present in a tailing portion (14) at a terminal end (13) of each application area (11).

The present disclosure relates to a multilayer electrode and a method of manufacturing the same, and more specifically to a multilayer electrode comprising an electrode collector; and two or more electrode active material layers which are sequentially coated on one surface or both surfaces of the electrode current collector, wherein the electrode active material layers each include a carbon-based material, a binder, and a silicon-based material, wherein in the mutually adjacent electrode active material layers based on the direction of formation of the electrode active material layers, the content of the carbon-based material and the content of the binder in the electrode active material layer located relatively close to the electrode collector are larger than the content of the carbon-based material and the content of the binder in the electrode active material layers located relatively far away from the electrode current collector.

The present disclosure relates to a multilayer electrode and a method of manufacturing the same, and more specifically to a multilayer electrode comprising an electrode collector; and two or more electrode active material layers which are sequentially coated on one surface or both surfaces of the electrode current collector, wherein the electrode active material layers each include a carbon-based material, a binder, and a silicon-based material, wherein in the mutually adjacent electrode active material layers based on the direction of formation of the electrode active material layers, the content of the carbon-based material and the content of the binder in the electrode active material layer located relatively close to the electrode collector are larger than the content of the carbon-based material and the content of the binder in the electrode active material layers located relatively far away from the electrode current collector.

A lithium secondary battery includes a cathode including a cathode current collector, and a first cathode active material layer and a second cathode active material layer sequentially formed on the cathode current collector, an anode, and a separation layer interposed between the cathode and the anode. The first cathode active material layer and the second cathode active material layer include a first cathode active material particle and a second cathode active material particle, respectively, which have different compositions or crystalline structures from each other, and the first cathode active material particle and the second cathode active material particle include lithium metal oxides containing nickel. The second cathode active material particle has a single particle structure.

A lithium secondary battery includes a cathode including a cathode current collector, and a first cathode active material layer and a second cathode active material layer sequentially formed on the cathode current collector, an anode, and a separation layer interposed between the cathode and the anode. The first cathode active material layer and the second cathode active material layer include a first cathode active material particle and a second cathode active material particle, respectively, which have different compositions or crystalline structures from each other, and the first cathode active material particle and the second cathode active material particle include lithium metal oxides containing nickel. The second cathode active material particle has a single particle structure.

According to one embodiment, an electrode includes a current collector and an active material layer. The active material layer is disposed on at least one of faces of the current collector. The active material layer comprises active materials which include at least a cobalt-containing oxide and a lithium nickel manganese oxide. A ratio of a weight of the cobalt-containing oxide to a total of weights of the cobalt-containing oxide and the lithium nickel manganese oxide is 5 wt % or more and 40 wt % or less.

According to one embodiment, an electrode includes a current collector and an active material layer. The active material layer is disposed on at least one of faces of the current collector. The active material layer comprises active materials which include at least a cobalt-containing oxide and a lithium nickel manganese oxide. A ratio of a weight of the cobalt-containing oxide to a total of weights of the cobalt-containing oxide and the lithium nickel manganese oxide is 5 wt % or more and 40 wt % or less.

Provided are a cobalt-free system, a positive electrode slurry, a slurry homogenization method therefor, and the use thereof. The cobalt-free system comprises a cobalt-free material, a binder, a conductive agent and a pH regulator. The cobalt-free system can reduce the rebound degree of the viscosity of a slurry after leaving to stand to the same degree as that of a ternary 811 single crystal, and can also improve the stability of the coating surface density of the cobalt-free material to the same level as that of a ternary material.

A lithium ion battery includes a cathode, which has a composite cathode active material, and an anode, which has an anode active material. The composite cathode active material includes at least a first and a second cathode active material, wherein the second cathode active material is a compound having an olivine structure, and wherein at least a lithiation degree of the first cathode active material differs from a lithiation degree of the second cathode active material. Prior to electrolyte filling or the first discharging and/or charging process of the lithium ion battery, the lithiation degree of the first cathode active material is higher than the lithiation degree of the second cathode active material. Prior to electrolyte filling or the first discharging and/or charging process of the lithium ion battery, the anode active material is pre-lithiated. A method for producing a lithium ion battery of this kind is also described.

Articles and methods related to electrochemical cells and/or electrochemical cell components (such as electrodes) comprising species comprising a conjugated, negatively-charged ring comprising a nitrogen atom and/or reaction products of such species are generally provided. The electrochemical cell may comprise an electrode (e.g., a cathode) comprising a protective layer comprising a species comprising a conjugated, negatively-charged ring comprising a nitrogen atom and/or a reaction product thereof.