Abstract: A negative electrode for secondary batteries according to an embodiment of the present disclosure may include: a negative electrode current collector; a first negative electrode active material layer formed on at least one surface of the negative electrode current collector and including a first silicon-based negative electrode active material; and a second negative electrode active material layer formed on the first negative electrode active material, including a second silicon-based negative electrode active material, and having a greater thickness than that of the first negative electrode active material layer, wherein the first silicon-based negative electrode active material may be included in a specific content, and the content of the first silicon-based negative electrode material in the first negative electrode active material layer and the content of the second silicon-based negative electrode active material in the second negative electrode active material layer may satisfy specific relationships.

Abstract: A negative electrode, and a method and apparatus for manufacturing a negative electrode, are provided. The apparatus for manufacturing a negative electrode includes a pair of magnet plates including an upper magnet plate and a lower magnet plate respectively disposed above and below a plane (e.g., X-Y plane) in which the negative electrode moves in a direction (e.g., X-axis direction). In the magnet plate, first and second vertical unit magnets and first and second horizontal unit magnets with magnetic force lines having different directions are arranged, and a direction of magnetic force lines of the unit magnets changes by 90 degrees in a second direction (e.g., Y-axis direction). The upper and lower magnet plates have opposite polarities, and the upper and lower magnet plates have constant magnetic force in the first direction and a magnetic force changing in the second direction.

Abstract: Provided are a polyimide-based film, a window cover film, and a display device including the same. More specifically, a polyimide-based film having different surface energies from each other on both surfaces, a window cover film having excellent optical properties such as a visibility, and a display panel including the same are provided.

Abstract: Provided are a polyimide-based film, a window cover film, and a display panel including the same. More specifically, a polyimide-based film having a micro flexural modulus of 10 GPa or more and a micro flexural strength of 150 MPa or more is provided.

Abstract: Provided are a polyimide-based film, a window cover film, and a display device including the same. More specifically, a polyimide-based film having different surface energies from each other on both surfaces, a window cover film having excellent optical properties such as a visibility, and a display panel including the same are provided.

Abstract: Provided are an optical film using a cellulose derivative, useful in an image display device, such as a liquid crystal display or the like, a retardation film and a polarization film using the optical film, and a liquid crystal display having excellent view angle characteristics by using these films, while the optical film uses a cellulose derivative resin in which some hydrogen atoms of hydroxy groups of cellulose are substituted with three or more kinds of substituents.

Abstract: Provided is an optical film used for the optical compensation, in which additives are added to thereby have a good stability at high temperature and high humidity, a higher chromaticity, a higher Haze and a higher moisture resistance, as well as a small thickness direction retardation (Rth).

Abstract: Provided are an optical film using a cellulose derivative, useful in an image display device, such as a liquid crystal display or the like, a retardation film and a polarization film using the optical film, and a liquid crystal display having excellent view angle characteristics by using these films, while the optical film uses a cellulose derivative resin in which some hydrogen atoms of hydroxy groups of cellulose are substituted with three or more kinds of substituents.