Abstract: A core-shell gradient ternary precursor and a preparation method and application thereof. The preparation method includes (1) mixing a terephthalic acid solution with alkaline liquor to obtain a terephthalic acid salt solution, adding a nickel source solution for a reaction to obtain a Ni-MOF solution, mixing the Ni-MOF solution with ammonia water, and adjusting a pH value to obtain a base solution; and (2) adding a nickel-cobalt-manganese ternary mixed salt solution, a liquid alkali solution, and an ammonia-water solution simultaneously to the base solution obtained in step (1) for a co-precipitation reaction, and obtaining the core-shell gradient ternary precursor after aging treatment. The Ni-MOF is pre-prepared and used as a core for the co-precipitation reaction, to obtain the core-shell like precursor with a gradient. Carbon in the core of the core-shell gradient ternary precursor reacts with oxygen, thereby reducing a nickel oxidation state on particle surfaces and reducing crack generation.

Abstract: Disclosed in the present disclosure are a positive electrode material precursor and a positive electrode material and preparation methods therefor, and a sodium-ion battery. The positive electrode material precursor comprises an inner core and a shell wrapping the periphery of the inner core, wherein the inner core is NixFeyMn1-x-y(OH)2, where 0.2?x?0.7, and 0.2?y?0.5; the shell is MaMn1-a(OH)2, where M is nickel or iron, and 0.05?a?0.7; and both the inner core and the shell are formed by stacking flaky primary particles.

Abstract: The present application provides a full-process automatic control system and method based on a sludge double recirculation Anaerobic-Anoxic-Oxic (AOA) process. The system includes an anaerobic tank, an aerobic tank, an anoxic tank, a sedimentation tank, a monitoring system, an aeration system, a sludge discharge system, and a control system. The anaerobic tank, the aerobic tank, the anoxic tank, and the sedimentation tank are sequentially communicated. A sludge reflux port of the sedimentation tank is communicated with the anaerobic tank and the anoxic tank through a first sludge reflux pipe and a second sludge reflux pipe respectively. The monitoring system includes a water inlet flowmeter, a Chemical Oxygen Demand (COD) analyzer, NH3-N analyzers, a Dissolved Oxygen (DO) monitor, Mixed Liquor Suspended Solid (MLSS) analyzers, a gas flowmeter, a first reflux sludge flowmeter, a second reflux sludge flowmeter, and a sludge level meter that are all in communication connection with the control system.

Abstract: A high-nickel ternary core-shell precursor for a lithium battery, a positive electrode material and a preparation method therefor. The chemical structural formula of the precursor is zNi(C4H7N2O2)2—Nix-zM1yM21-x-y(OH)2, wherein M1 and M2 are two of cobalt, aluminum, and manganese. The preparation method comprises: pumping a prepared metal salt solution, a dimethylglyoxime-ammonia water composite solution, and an ammonia water solution into a reaction kettle, maintaining the pH of a reaction system, and controlling the reaction time to obtain a sphere-like precursor inner core with a structural formula of Ni(C4H7N2O2)2; pumping the metal salt solution and the ammonia water solution, stopping pumping the dimethylglyoxime-ammonia water composite solution, pumping a sodium hydroxide solution to obtain a sphere-like core-shell precursor, washing, drying, sieving and deironing the precursor, mixing with a lithium source, and calcining to prepare the positive electrode material.

Abstract: The present invention provides a method of preparing an MOF-coated monocrystal ternary positive electrode material. Firstly, a solution A of nickel, cobalt and manganese metal salts, an ammonia complexing agent solution and a caustic soda liquid are added to a reactor for reaction to obtain a precursor core; then, an organic carboxylate is dissolved in an amount of an organic solvent to obtain a solution B; the solution B and a manganese metal salt solution with a given concentration are added to the reactor and aged to obtain an MOF-coated core-shell structure precursor; the core-shell structure precursor is pre-sintered at a low temperature to obtain a nickel-cobalt-manganese oxide with monocrystal structure; the nickel-cobalt-manganese oxide with monocrystal structure is uniformly mixed with LiOH·H2O in a mortar and then calcined at a high temperature to obtain an MOF-coated monocrystal ternary positive electrode material.

Abstract: An air circulation device for an air purifier includes an air passage apparatus which includes an air passage body having a first air outlet and a second air outlet formed in an opposing manner and defining an air passage between the first air outlet and the second air outlet, and an air flow generating unit mounted to the single fan unit in the air passage body and configured to draw air inletting into the air passage and form an air flow flowing towards the first air outlet and the second air outlet. The air circulation device further includes an air distribution member disposed in the air passage body and configured to provide different air outlet flowing speeds at the first air outlet and the second air outlet.

Abstract: The present invention provides a method of preparing an MOF-coated monocrystal ternary positive electrode material. Firstly, a solution A of nickel, cobalt and manganese metal salts, an ammonia complexing agent solution and a caustic soda liquid are added to a reactor for reaction to obtain a precursor core; then, an organic carboxylate is dissolved in an amount of an organic solvent to obtain a solution B; the solution B and a manganese metal salt solution with a given concentration are added to the reactor and aged to obtain an MOF-coated core-shell structure precursor; the core-shell structure precursor is pre-sintered at a low temperature to obtain a nickel-cobalt-manganese oxide with monocrystal structure; the nickel-cobalt-manganese oxide with monocrystal structure is uniformly mixed with LiOH.H2O in a mortar and then calcined at a high temperature to obtain an MOF-coated monocrystal ternary positive electrode material.

Abstract: The present disclosure discloses a bendable device. The bendable device comprises a screen layer, a supporting layer and a bending layer, wherein the bending layer comprises a first main body, a second main body and a bendable component. The first main body is connected with the second main body through the bendable component, the bending layer, the supporting layer and a flexible layer are arranged in a laminated manner successively. In the present disclosure, the supporting layer comprises the hollow pieces, the hollow pieces comprising the at least one first branch with the vertical component, so that stacked material at a hollow portion of the hollow pieces has a small overall modulus, and stacked material of a non-hollow portion has a large overall modulus due to a large material modulus of the supporting layer. When bending the bendable device, the large stress could be released.

Abstract: The present disclosure relates to a display screen and a display device integrated with the same. The display screen includes: a screen body having an active display area defined by a contour line, and a cover plate covering the screen body. The cover plate has a cover area corresponding to corners of the active display area, and the cover area covers the corners.

Abstract: A display device includes a cover plate, a display screen and a photoreceptor, the cover plate is disposed on the display screen, and the cover plate is provided with a light shielding layer. The light shielding layer is provided with a light transmitting area, and the photoreceptor is disposed corresponding to the light transmitting area. The display device of the present application can improve the photographic properties and the accuracy of the photoreceptor, and make it easier to assemble, and reduce assembly steps.

Abstract: A driver circuit carrier, a display panel, and a manufacturing method are provided. The driver circuit carrier includes a substrate, and a number of first pins arranged on at least one surface of the substrate. The first pins are arranged along a first reference line. An imaginary extending line of at least one of the first pins intersects with a second reference line perpendicular to the first reference line.

Abstract: The present disclosure relates to a display screen and a display device integrated with the same. The display screen includes: a screen body having an active display area defined by a contour line, and a cover plate covering the screen body. The cover plate has a cover area corresponding to corners of the active display area, and the cover area covers the corners.

Abstract: A display device includes a cover plate, a display screen and a photoreceptor, the cover plate is disposed on the display screen, and the cover plate is provided with a light shielding layer. The light shielding layer is provided with a light transmitting area, and the photoreceptor is disposed corresponding to the light transmitting area. The display device of the present application can improve the photographic properties and the accuracy of the photoreceptor, and make it easier to assemble, and reduce assembly steps.

Abstract: A driver circuit carrier, a display panel, and a manufacturing method are provided. The driver circuit carrier includes a substrate, and a number of first pins arranged on at least one surface of the substrate. The first pins are arranged along a first reference line. An imaginary extending line of at least one of the first pins intersects with a second reference line perpendicular to the first reference line.