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A cathode active material for a secondary battery includes a plurality of a lithium metal oxide particle. A molar ratio of manganese based on total moles of all metal elements excluding lithium in the lithium metal oxide particle is in a range from 0.15 to 0.3, and a molar ratio of cobalt based on total moles of all metal elements excluding lithium in the lithium metal oxide particle is 0.05 or less. An R-factor of the lithium metal oxide particle is in a range from 0.45 to 0.57.

The present disclosure relates to a separator, a method for manufacturing the same, and an electrode assembly including the same. The separator according to one aspect comprises: a substrate; and a coating layer formed on at least one surface of the substrate, wherein the coating layer comprises an inorganic material and a first binder, a glass transition temperature of the first binder is 100 °C or less, and the following Equation 1 can be satisfied: 1.2≤DB1/TC≤2.0In Equation 1, D_B1 is a particle diameter (D50) at a volume fraction of 50% in a cumulative particle size distribution of the first binder, and T_c is a thickness of the coating layer.

A cathode active material for a secondary battery includes a lithium metal oxide particle which contains nickel and cobalt and has a single particle structure. A content of cobalt increases in a direction from a particle center to a particle surface in at least a portion of a region between the particle center and the particle surface. The content of cobalt is in a range from 3 mol% to 20 mol%, and a content of nickel is in a range from 60 mol% to 90 mol% among elements of the lithium metal oxide particle excluding lithium and oxygen.

An electrode for a secondary battery, a method of fabricating the same, and a secondary battery including the same are provided. The electrode for a secondary battery includes a current collector, an active material layer disposed on the current collector. The active material layer includes an active material, and a protective coating formed on at least a portion of a surface of the active material or at least a portion of a surface of the active material layer and including an aryl-ring-containing metal compound.

A system, a use of said system, and a method for manufacturing and drying of one or more electrodes for a secondary battery are disclosed. The system (1) includes a coating portion (30) adapted to apply a coating material (6) to a coating substrate (5) travelling along a path; and a drying portion (40) adapted to dry the coating material (6), wherein the drying portion (40) includes at least one Coanda nozzle (71) that is adapted to spray hot air onto one surface of the coating substrate (5), and wherein the Coanda nozzle (71) includes at least one hot-air blocker (90) that is adapted to selectively block a spray port through which hot air is sprayable.

The present disclosure relates to a battery assembly and a method for reducing risk of thermal runaway therein. A battery assembly according to one embodiment of the present disclosure comprises at least two battery cells; and a barrier disposed between the two battery cells, wherein the barrier comprises a sheet-shaped blocking layer, a surface pressure layer stacked on at least one surface of the blocking layer, the surface pressure layer comprises a first region in contact with the blocking layer and a second region which is a region other than the first region, and a protective layer may be stacked on at least a portion of the second region.

Provided are a secondary battery and a method of manufacturing the same. According to one aspect of the present disclosure, a secondary battery may be provided, which includes an electrode assembly provided with an electrode tab, a can that accommodates the electrode assembly and has a coupling hole provided in an outer part of one surface facing the electrode tab, and a terminal inserted into the coupling hole and electrically connected to the electrode tab.

A secondary battery is disclosed. According to the present disclosure, there is provided a secondary battery including an electrode assembly accommodated in a case, a current collector electrically connected to the electrode assembly, and a rivet welded to the current collector, wherein the current collector includes a stress relief space configured to accommodate least a portion of a weld bead generated during welding with the rivet.

Provided are a composite electrolyte membrane and a lithium secondary battery including the same. According to an aspect of the present disclosure, a composite electrolyte membrane including: a fluorine-based porous support; and a gel polymer electrolyte including a fluorine-based compound is provided.

Proposed is an immersion cooling module including a housing (10) in which an inlet (11) for cooling fluid to flow in and an outlet (12) for cooling fluid to flow out are formed, and in which the cooling fluid is accommodated at a predetermined level so as to form an upper space, a cooling chamber (20) coupled to a lower end of the housing (10), and configured to have a chamber inlet (21) through which the cooling fluid flows in and a chamber outlet (22) through which the cooling fluid is discharged, battery cells spaced apart from each other and immersed in the cooling fluid, and cooling fluid passage parts respectively formed in cooling spaces divided by the battery cells, wherein heat transfer members are arranged at predetermined intervals in a direction perpendicular to a flow direction of the cooling fluid.