8results about How to "Reduce chalking" patented technology

The invention provides a silicon-carbon negative electrode material, a preparation method thereof and a lithium ion battery. The silicon-carbon negative electrode material comprises a porous carbon substrate, nano silicon deposited on the surface and in pores of the porous carbon substrate, and a conductive polymer layer coated on the surface of the nano silicon, the porous carbon matrix is formed by taking zinc gluconate as a carbon source through high-temperature pyrolysis and carbonization. According to the silicon-carbon negative electrode material, the preparation method thereof and the lithium ion battery provided by the invention, the silicon-carbon negative electrode material has high specific surface area, excellent conductivity and stable cycle performance, and shows excellent cycle stability and relatively high reversible capacity in the charge-discharge process when being used for the lithium ion battery; the energy density and the cycle life of the lithium ion battery are effectively improved, a new technical approach is provided for preparation of the silicon negative electrode material of the lithium ion battery, and the preparation method has a wide application prospect.

The invention discloses a microporous carbon-coated core-shell nano composite material, a preparation method and application, and relates to the technical field of lithium batteries, and the preparation method comprises the following steps: uniformly dispersing silicon powder and graphite in a solvent to form a core material suspension; dopamine hydrochloride and hydrogen peroxide are added into the nuclear material suspension, polymerization reaction is carried out at the temperature of 60-85 DEG C, composite slurry is obtained, and the ratio of the total mass of the silicon powder and the graphite to the mass of the dopamine hydrochloride is 1: (0.1-0.5); carrying out spray drying treatment on the composite slurry to obtain precursor powder; sintering the precursor powder at high temperature to obtain a microporous carbon coated core-shell nano composite material; the microporous carbon-coated silicon / graphite core-shell nano composite material is prepared by adopting a polydopamine in-situ polymerization technology initiated by hydrogen peroxide and combining a subsequent spray drying and carbonization process, and the material has good rate capability, cycling stability, charge-discharge efficiency and low interface impedance.

The present application relates to the technical field of sodium ion battery negative electrode material, and specifically to modified hard carbon negative electrode material and its preparation method and application, the present application takes biomass waste oil tea shell as raw material, adopts sulfuric acid and phosphoric acid as dopant, carries out porosification and activation, obtains P, S double atom doping pre-carbonization porous carbon material after carbonization, takes tetraethyl orthosilicate as raw material to prepare nano SiO2 microspheres under catalysis, carries out carbonization after blending nano SiO2 microspheres and P, S double atom doping pre-carbonization porous carbon material, obtains modified hard carbon negative electrode material through pyrolysis reaction with magnesium powder at the same time of carbonization, the element doping in modified hard carbon negative electrode material provides more active sites for sodium ion storage, improves the theoretical capacity and conductivity of the material, and the nanoscale silicon powder reduces the pulverization phenomenon caused by volume expansion when silicon is used as the negative electrode material of sodium ion battery due to the special size effect, reduces the attenuation of battery capacity.

This invention relates to the field of anode materials, specifically to an antimony-based anode material, its preparation method, and a lithium-ion battery. The method involves preparing Schiff base-functionalized carbon quantum dots by adding a phosphorus source, an antimony source, and the Schiff base-functionalized carbon quantum dots to a reaction solvent, followed by a solvothermal reaction. This antimony-based anode material achieves a synergistic improvement in high specific capacity, long cycle life, excellent rate performance, and high structural stability, making it a highly promising anode material for lithium batteries, particularly suitable for high-energy-density, long-life lithium-ion batteries.

The invention relates to the technical field of waste gas treatment, and discloses a hazardous waste incineration flue gas efficient denitration device and method.The hazardous waste incineration flue gas efficient denitration device comprises a first tower body, a top tray is fixedly installed at the top of the first tower body, a spraying box is arranged on the side face of the first tower body, and the output end of the spraying box communicates with a heat exchanger; the heat exchanger penetrates through the top tray and is communicated with the first tower body, a denitration mechanism, a driving mechanism and an adjusting mechanism are respectively arranged in the first tower body, a front deacidification pool is arranged below the first tower body, a mixer is arranged in the front deacidification pool, a plurality of spray valves are arranged at the top of the mixer, and the spray valves are communicated with the first tower body. The input end and the output end of the front deacidification pool are respectively communicated with a waste gas channel and a bag-type dust collector, the bag-type dust collector is communicated with the spraying box, and the denitration mechanism is arranged, so that the first catalyst bed is movably arranged, the side surface of the first catalyst bed is provided with a corresponding heat discharge port, and when the temperature of the first catalyst bed is high, the first catalyst bed is subjected to heat dissipation treatment.

The application relates to the technical field of zinc oxide materials, and discloses zinc-based isomeric zinc oxide as well as a preparation method and application thereof. The zinc-based isomeric zinc oxide is used for ship antifouling paint, and the zinc-based isomeric zinc oxide comprises a crystal nucleus layer, the chemical general formula of the crystal nucleus layer is: [(ZnO) x (Si a , Mg b , Zn c , Ni d )Al2O 4z ] y , x=0.5-1.2, a=0.1-0.3, b=0.05-0.15, c=0.2-0.4, d=0.02-0.08, z=0.8-1.2, and y=0.9-1.1. The zinc-based isomeric zinc oxide contains zinc oxide phases and zinc-based spinel solid solution phases, the two phases form low-energy coherent interfaces through interface reconstruction, the release rate of zinc ions can be controlled, marine toxicity caused by explosive release can be avoided, marine organism adhesion can be reduced, the powdering degree of the antifouling paint coating can be reduced, and the corrosion current density can be reduced, and therefore the zinc-based isomeric zinc oxide is suitable for environmentally-friendly ship antifouling paint.

The invention relates to a metal lithium composite negative electrode and a preparation method thereof and a metal lithium battery, the negative electrode comprises a lithium-containing layer, and an interface stable layer is arranged on the surface of the lithium-containing layer; the interface stabilizing layer comprises a carbon fluoride material, a nano carbon material and an interface stabilizer. A carbon fluoride material in the interface stable layer is in contact with the lithium-containing layer, lithium fluoride can be generated in situ, and the lithium fluoride has the effect of stabilizing the interface of the composite negative electrode and an electrolyte, so that uniform deposition of lithium is facilitated, and generation of lithium dendrites is inhibited; a three-dimensional network channel structure is constructed by the nano carbon material, so that lithium ions and electrons can be regulated and controlled at the same time, uniform deposition of lithium is facilitated, and meanwhile, an effect of connecting a lithium-containing layer and an interface stabilizing layer is also achieved; the interface stabilizer is specifically selected and has a synergistic effect with the carbon fluoride material and the nano carbon material, so that the mechanical property of the interface layer and the stability of the composite negative electrode are remarkably enhanced, and the composite negative electrode has excellent cycle performance and rate capability.

A high sphericity single crystal positive electrode material, whose chemical formula is Li a Ni 1‑x‑y‑z‑v Co x M y A z B v O 2‑w , M is Mn and / or Al, the ionic radius or ionic group radius of A is greater than 85pm, the ionic radius or ionic group radius of B is not greater than 70pm, and the difference between the ionic radius or ionic group radius of A and B is not less than 45pm. The preparation method is: the positive electrode material precursor, lithium salt, compound containing A and compound containing B are mixed evenly, and then two stages of high-temperature sintering are performed. After the sintering is completed, the sintered material is crushed and sieved to obtain a single crystal positive electrode material with high sphericity. The principle that A promotes the growth of single crystals and B inhibits the growth of single crystals is used to adjust the growth rate of single crystal particles in different directions, so that the growth rate in each direction tends to be uniform, avoiding disordered excessive growth of particles in certain specific directions, and reducing agglomeration, thereby ensuring that the single crystal positive electrode material has high sphericity, roundness and high dispersion.