55results about How to "Coated evenly" patented technology

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The utility model relates to the technical field of gluing devices, and discloses a gluing device for antibacterial formaldehyde-removing wall cloth processing, which comprises a working box, a placing groove is formed in the working box, a third support frame is fixedly connected to one side, far away from a first support frame, of the top of the working box, and a motor is fixedly connected to the side wall of a second support frame. The output end of the motor is fixedly connected with a glue roller, the glue roller is rotationally connected to the inner wall of a second supporting frame, a scraping plate is arranged on the second supporting frame, scraping assemblies are arranged on the two sides of the top of the working box, and the scraping plate is used for scraping redundant glue on the glue roller; by simply rotating the screw and accurately adjusting the distance between the scraper and the rubber roller, the problems of waste caused by excessive glue, uneven surface of the wall cloth, glue seepage and the like are effectively avoided, the quality defects of unstable pasting, hollowing, edge warping and the like of the wall cloth caused by too little glue are effectively avoided, and the stable and reliable quality of the wall cloth is ensured.

The invention provides a composite material, a preparation method thereof and conductive slurry, and belongs to the technical field of conductive materials. The preparation method comprises the steps that a base material is pretreated, an activated base material is obtained, and the base material comprises copper powder or nickel powder; and an atomic layer deposition technology is adopted, a coating layer is deposited on the surface of the activated base material, the composite material is obtained, and the coating layer comprises a silver layer. The composite material prepared by the invention has the characteristics of uniform and compact coating, controllable thickness, strong interface bonding force, strong oxidation resistance, stable performance and the like, and the performance of the conductive slurry can be remarkably improved.

The application belongs to the technical field of all-solid-state lithium-sulfur battery materials, and relates to a lithium sulfide nano composite positive electrode material with high reaction kinetics and a preparation method and application thereof. The application aims to solve the deficiencies of the lithium sulfide positive electrode material in ion and electron conductivity, reduce the activation barrier of the lithium sulfide positive electrode material, improve the battery redox kinetics, and further improve the rate performance and cycle capacity of the battery. The lithium sulfide nano composite positive electrode material is prepared by using an in-situ synthesis method, the obtained composite material has rich metal atom crystals embedded in the lithium sulfide matrix, and a layer of amorphous carbon is uniformly coated on the surface. The finally obtained lithium sulfide nano composite positive electrode material exhibits high reversible capacity and excellent rate performance. The application has the characteristics of uniform coating and simple process, is suitable for large-scale production, and has a wide application prospect in the field of all-solid-state lithium-sulfur batteries.

This application relates to the field of solid waste resource utilization technology, specifically disclosing a method for synthesizing lithium iron phosphate based on sludge incineration ash through electrocoagulation-lithiation. The method involves leaching sludge incineration ash with dilute sulfuric acid to obtain a phosphate-containing acid leachate, followed by purification with a cation exchange resin to remove multivalent metal impurities. Using the purified phosphate solution as the base electrolyte, a lithium source, electrolyte, and organic carbon source are added, and the pH is adjusted. An iron plate is used as the anode and an inert electrode as the cathode for electrocoagulation. Fe²⁺ dissolved at the anode co-precipitates with PO₄³⁻ and Li⁺ in the solution to form a LiFePO₄ precursor slurry. Finally, solid-liquid separation, washing, drying, and programmed temperature sintering are performed to obtain a carbon-coated lithium iron phosphate composite material. This application has the advantage of achieving high-value utilization of sludge incineration ash.

The utility model relates to the technical field of carbon brush production, in particular to a carbon brush oiling tool which is provided with a horizontal moving unit, a vertical moving unit is arranged on the horizontal moving unit, an oiling unit is arranged on the vertical moving unit, the oiling unit comprises an oil pipe, an oil injection valve and an oiling brush, and an oiling position adjusting unit is arranged on the vertical moving unit. Through linkage control of the horizontal moving unit and the vertical moving unit, it is ensured that the oiling brush can be accurately positioned to the starting point of the carbon brush milling arc face, and continuous and uniform covering of an oil film is achieved through the constant-speed pulling-up action from bottom to top. The oil injection valve and the lifting speed are synchronously adjusted, the oil quantity and thickness can be accurately controlled, and the problem that an oil film is too thick or too thin in traditional manual operation is solved; the oiling position adjusting unit is integrated on the vertical moving unit, so that transverse deviation is supported, carbon brushes of different sizes and radians are adapted, missing coating or uneven coating caused by workpiece tolerance is avoided, and the process compatibility is remarkably improved.

This invention discloses a method for preparing a graphene / silicon-carbon composite anode material. The method includes: firstly, preparing a carbon-coated silicon dioxide precursor via a hydrothermal reaction; then, converting it into a carbon-coated silicon material using a magnesothermic reduction method in the presence of sodium chloride, effectively inhibiting the aggregation and growth of silicon particles; finally, combining graphene with the carbon-coated silicon material through a secondary hydrothermal and calcination treatment to construct a conductive network. This invention, through a multi-level structural design, utilizes the synergistic buffering effect of the internal carbon layer and the external graphene to effectively alleviate the volume expansion of silicon during charging and discharging, significantly improving the conductivity and structural stability of the material. The prepared composite anode material exhibits high specific capacity and excellent cycle performance, making it suitable for lithium-ion battery applications.

The application provides a lithium-rich lithium-iron material, a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The lithium-rich lithium-iron material comprises a core and a coating layer coated on the surface of the core. The material of the core is lithium-rich lithium-iron doped with a first doping element, and the material of the coating layer is carbon material doped with a second doping element. The first doping element comprises at least one of Ti, W, Ni, Ce and Co, and the second doping element comprises at least one of B, N, S, O and P. The lithium-rich lithium-iron material is used as a lithium supplement in a battery, so that the capacity of the battery can be further improved and the gas production amount can be reduced.