Abstract: The present disclosure discloses a method for preparing a coating-modified high-nickel ternary cathode material, relating to the technical field of lithium-ion battery cathode materials. The method includes: reacting a diisocyanate with a dihydric alcohol, and adding lignin modified with an organic amine instead of an amine chain extender to prepare a modified polymer emulsion; and adding a high-nickel ternary cathode material to a lignin-amine-modified polymer emulsion, and carrying out spray drying for curing and film formation, thereby obtaining the coating-modified high-nickel ternary cathode material. The beneficial effects lie in that spray drying is used for curing and film formation, so a polymer coating layer is continuous and homogeneous, which provides the material with good mechanical properties. Thus, structural changes caused by a reduced cobalt content can be inhibited. A large amount of wastewater resulting from a wet coating process is reduced, and the manufacturing costs are reduced.

Abstract: The present disclosure relates to a display panel and a display device thereof. The display panel includes: a substrate; an organic light-emitting device located on the substrate; a cover layer located on the organic light-emitting device; a light extraction layer located on the cover layer; an optical functional layer located on the light extraction layer; and an encapsulation layer located on the optical functional layer. A refractive index of the light extraction layer is less than a refractive index of the cover layer and less than a refractive index of a portion of the encapsulation layer closest to the optical functional layer. A refractive index of the optical functional layer is less than the refractive index of the portion of the encapsulation layer closest to the optical functional layer and not equal to the refractive index of the light extraction layer.

Abstract: Provided are a light-emitting device and a manufacturing method thereof, and a display device, and relates to the field of display technology. The light-emitting device includes: a light-emitting unit located on one side of a backplane; and an encapsulation layer located on one side of the light-emitting unit away from the backplane. The encapsulation layer includes: a first inorganic layer; a second inorganic layer located on one side of the first inorganic layer away from the backplane; an organic layer located between the first inorganic layer and the second inorganic layer; and a third inorganic layer located between the first inorganic layer and the organic layer. The refractive index of the first inorganic layer, the refractive index of the third inorganic layer, and the refractive index of the organic layer decrease sequentially.

Abstract: A power rack apparatus is provided for spotting weights. The power rack apparatus allows a user to lift weights to failure without the need of a human spotter. The power rack apparatus includes a power rack frame, a weight-catching system, and a controller. The power rack frame is a standard structural frame of a power rack that allows a user to rack weights after he or she has completed a weightlifting workout. The weight-catching system spots weights for the user using at least one chain drive mechanism, a first racking arm, and a second racking arm. Through the weight-catching system, the user is allowed to lift weights to failure and is spotted by weight-catching system when necessary. The controller manages and controls the weight-catching system in order for the weight-catching system to effectively spot weights for the user.

Abstract: A power rack apparatus is provided for spotting weights. The power rack apparatus allows a user to lift weights to failure without the need of a human spotter. The power rack apparatus includes a power rack frame, a weight-catching system, and a controller. The power rack frame is a standard structural frame of a power rack that allows a user to rack weights after he or she has completed a weightlifting workout. The weight-catching system spots weights for the user using at least one chain drive mechanism, a first racking arm, and a second racking arm. Through the weight-catching system, the user is allowed to lift weights to failure and is spotted by weight-catching system when necessary. The controller manages and controls the weight-catching system in order for the weight-catching system to effectively spot weights for the user.

Abstract: A manufacturing method of a film layer, a display substrate and a manufacturing method thereof, and a device for manufacturing a display substrate are provided. The manufacturing method of a film layer includes: forming an organic layer on a substrate, in which the organic layer includes a flat portion and a slope portion around the flat portion; and heating the flat portion to cause a material of the flat portion to flow toward the slope portion, such that a thickness of a portion of the slope portion close to the flat portion is identical to a thickness of the flat portion to increase a size of the flat portion in a direction parallel to the substrate.