5results about How to "Achieve wrapping" patented technology

The invention discloses a coal-based hard carbon material as well as a preparation method and application thereof. The method comprises the following specific steps: crushing and screening a coal-based raw material, pickling and deliming to obtain ultra-pure coal powder; mixing the ultra-pure pulverized coal with the soft carbon precursor, and performing carbonization treatment in an inert atmosphere; and mixing the carbonized sample with a solvent, and carrying out secondary sintering and curing to obtain the coal-based hard carbon material. The soft carbon precursor coating layer is used for reducing surface irreversible defects and improving coulombic efficiency and electronic conductivity, oxygen-containing functional groups such as carbonyl are introduced and cured in combination with the capacity increasing agent and secondary sintering, more reversible active sites are provided, and higher disorder degree and more excellent electrochemical performance are obtained. The preparation method is low in raw material cost and simple in treatment process, and is a sodium ion battery negative electrode material with commercialization prospects.

The invention provides a grain boundary coating method of a polycrystalline positive electrode material and a grain boundary coated polycrystalline positive electrode material.The grain boundary coating method of the polycrystalline positive electrode material comprises the following steps that the polycrystalline positive electrode material is placed in a furnace tube of a tube furnace to be heated, and a gas-phase reaction source diffuses into the polycrystalline positive electrode material along a grain boundary under the action of airflow pressure, the gas-phase reaction source reacts on the surface and the grain boundary of the polycrystalline positive electrode material, so that a coating layer is formed on the surface and the grain boundary of the polycrystalline positive electrode material, and the grain boundary coated polycrystalline positive electrode material is obtained. According to the method, the gas-phase reaction source is subjected to chemical reaction on the surfaces of the primary particles of the polycrystalline positive electrode material to form the required grain boundary coating layer, so that the defects of non-uniform coating, incapability of directly coating the primary particles and the like in the prior art are overcome.

This invention relates to a method for preparing and applying a polypyrrole-coated indium-based electrocatalyst. The method includes the following steps: adding carbon nanotubes to an N,N-dimethylformamide solution containing indium nitrate, transferring the solution to a high-temperature reactor, and reacting to obtain In₂O₃ / CNT; placing the In₂O₃ / CNT in an aqueous solution containing pyrrole, and then adding ammonium persulfate to react, thereby obtaining the polypyrrole-coated indium-based electrocatalyst. The polypyrrole-coated indium-based electrocatalyst obtained by this invention exhibits excellent electrocatalytic performance in the reduction of carbon dioxide to formic acid, possessing both high Faradaic efficiency and long-term catalytic stability.

The present invention discloses a comprehensive film wrapping machine, which relates to the field of film coating equipment, including a control box, wherein the control box is used to control the circuit of the entire film wrapping machine, a material preparation rack is arranged on the left side of the control box, a horizontal displacement system is arranged on the left side of the material preparation rack, and a vertical displacement system is arranged on the horizontal displacement system, the vertical displacement system can freely shift horizontally on the horizontal displacement system, a film wrapping rod assembly is arranged on the vertical displacement system, the film wrapping rod assembly can freely shift up and down on the vertical displacement system, a rotating load-bearing platform is arranged below the film wrapping rod assembly, a plurality of hydraulic cylinders are arranged inside the rotating load-bearing platform, each hydraulic cylinder has an independent solenoid valve, a film wrapping clamp is arranged at the upper left corner of the rotating load-bearing platform, the invention can utilize the wave-like lifting and lowering of the bottom hydraulic cylinder to realize the purpose of the film wrapping rod bypassing the bottom of the goods for coating, and cooperate with the rotating load-bearing platform to realize comprehensive film wrapping of the goods.

The invention provides a solid electrolyte coating, a composite diaphragm and application, the solid electrolyte coating comprises a solid electrolyte, a binder and a wetting agent, and also comprises acidic amino acid as a binder reinforcing agent; the acidic amino acid comprises one or more of aspartic acid, glutamic acid and near-end cysteine; the mass of the acidic amino acid is 0.4-0.6% of the mass of the solid electrolyte; the binder has a fluorine-containing substituent group and / or an oxygen-containing substituent group. The amino acid is used for enhancing the bonding capacity of the adhesive and enhancing the peel strength of the coated diaphragm, so that the consumption of auxiliaries such as the adhesive is reduced, and diaphragm holes are prevented from being blocked by excessive auxiliaries. Lewis alkaline sites exist on the surface of the adopted lithium and sodium solid electrolyte, amino acid molecules are combined with the Lewis alkaline sites through carboxyl, solid electrolyte particles are coated, and the coating can reduce the surface energy of the lithium and sodium solid electrolyte particles and enhance the wettability.