485 results about "Carbon particle" patented technology

Document (100) with a security feature, comprising: a first substrate layer (103) having a first substrate layer region (105), wherein the substrate layer region (105) is impregnated with a black fluid over the entire thickness of the first substrate layer (103), the black fluid having carbon particles; a second substrate layer (107) with a second substrate layer region (109), wherein the second substrate layer (107) is arranged above the first substrate layer (103), the second substrate layer region (109) having a light reflection characteristic which differs from a light reflection characteristic of the first substrate layer region (105), wherein the first substrate layer region (105) and the second substrate layer region (109) form a composite security feature.

The invention relates to the technical field of heavy oil product treatment, in particular to a method and device for co-production of a carbon material through molten salt pyrolysis of a liquid oil product, and the method comprises the following steps: the liquid heavy oil product is put into an electric heating molten salt reactor through a continuous feeding system, and the molten salt reactor is filled with a molten alkaline molten salt medium; carrying out catalytic pyrolysis reaction on the oil product in a liquid phase environment of the molten salt medium, wherein the oil product stays in the molten salt for 5-10 seconds; the liquid oil product is uniformly cracked in the liquid phase of the molten salt to generate low-carbon hydrocarbon gas, hydrogen and dispersed fine carbon particles, and the carbon particles suspend on the surface under the buoyancy action of the molten salt and are not deposited and gathered; suspended carbon particles are collected from the surface of the fused salt in real time through a mechanical push rod continuous collection system; according to the method, continuous and stable pyrolysis of the heavy oil product and efficient and continuous separation of the product can be realized in the liquid-phase molten salt environment, the production efficiency is improved, and the stability of the product quality is ensured.

The invention relates to the technical field of battery negative electrode materials, in particular to irregular spherical porous carbon and a preparation method and application thereof, and a silicon-carbon composite material and a preparation method and application thereof. The liquid phenolic resin is emulsified, compounded, cross-linked and cured under the condition of an oil-soluble and water-soluble compound emulsifier, meanwhile, the shape of the obtained resin is changed in an ultrasonic-assisted mode under the combined action of ultrasonic disturbance and different interfacial tensions, spherical resin is adjusted into irregular spherical resin, and the spherical resin is prepared into the irregular spherical resin. And performing pyrolysis and gas activation to obtain the irregular porous spherical carbon. Compared with spherical carbon, the irregular spherical carbon prepared by the invention has the advantages that on the premise of keeping the strength of the spherical carbon, the irregular spherical carbon can increase the contact area between carbon particles and a binder, and the carbon particles and the binder are not easy to separate, so that the cycling stability of a battery (especially a lithium ion battery) is improved.

The invention belongs to the technical field of SiC crystal growth, and particularly relates to a thermal field component for SiC crystal growth and a preparation method of the thermal field component. The thermal field component comprises a thermal field component body, and the thermal field component body is made of a porous tantalum carbide material. The thermal field component can efficiently filter carbon particles, has corrosion resistance and long service life, and can remarkably reduce the production cost.

The invention relates to the technical field of batteries, in particular to a silicon-carbon negative electrode material and a lithium ion secondary battery. The silicon-carbon negative electrode material comprises silicon-carbon particles, the silicon-carbon particles comprise a matrix, and the matrix comprises a porous carbon matrix and silicon particles located in internal holes of the porous carbon matrix; the porous carbon substrate is provided with open pores and closed pores, the open pores contain silicon particles, the closed pores contain an element K, and based on the total mass of the silicon carbon particles, the mass content of the element K is 50 ppm to 1000 ppm; the silicon-carbon particles comprise halogen, and based on the total mass of the silicon-carbon particles, the mass content of the halogen is 50 ppm to 2000 ppm; the silicon carbon particles and deionized water are mixed according to the mass ratio of 1: 10 to obtain an aqueous solution, the pH value of the aqueous solution at 25 DEG C is pH 1, and the pH 1 is 6-8. Comprising the silicon-carbon negative electrode material disclosed by the invention has the advantages that the expansion rate is improved, and the rate capability and the cycle performance are improved.

The invention belongs to the technical field of batteries, and particularly relates to a preparation method of coating slurry, a silver-carbon negative electrode plate, a preparation method of the silver-carbon negative electrode plate and a solid-state battery. Compared with the prior art, by controlling the agglomeration degree of the silver material in the negative electrode active coating, silver and carbon particles can be uniformly dispersed, and on the basis of avoiding the generation of lithium dendrites, attachment sites and spaces of the silver particles on the carbon particles are increased, so that the safety performance and the electrical performance of the battery are improved.

A method comprising obtaining a bodily fluid from a subject; contacting the bodily fluid with an adsorbent material comprising a synthetic carbon particle (SCP) to produce a first filtrate having a level of disease mediators (y); contacting the first filtrate with an adsorbent material comprising the SCP and an anion exchange resin where the ratio of SCP to anion exchange resin is in a range from about 0.1:100 to 100:0.1 to produce a second filtrate; contacting the second filtrate with an adsorbent material comprising the SCP and a cation exchange resin where the ratio of SCP to cation exchange resin is in a range from about 0.1:100 to 100:0.1 to produce a third filtrate.

The invention belongs to the technical field of lithium ion battery negative electrode material preparation, and relates to a method for preparing a silicon alloy negative electrode based on three-dimensional spin control magnetron co-sputtering, which comprises the following steps: 1, substrate preparation: selecting carbon particles as a negative electrode material substrate; 2, particle three-dimensional spinning suspension: placing the carbon particles in a three-dimensional spinning suspension device, and continuously rolling and rotating in a plurality of space directions in a high vacuum environment; 3, sputtering target material configuration, wherein a silicon target and at least one alloy metal target are arranged in a magnetron co-sputtering cavity; 4, co-sputtering deposition: performing magnetron co-sputtering on the rotating carbon particles in a high-purity argon working atmosphere, and dynamically adjusting the input power of each target to enable a deposition coating to form a gradient composite alloy structure from a rich metal buffer layer to a high-silicon content region to obtain a composite powder material; the high silicon content is guaranteed, meanwhile, a buffer alloy phase and an interface bonding layer are introduced, and the problems of volume expansion and interface stripping in the circulation process are effectively solved.

The invention provides a negative-electrode-free sodium ion battery current collector, application thereof and a negative-electrode-free sodium ion battery, and relates to the technical field of batteries. The negative-electrode-free sodium ion battery current collector provided by the invention comprises a base material and a coating coated on the surface of the base material, the coating comprises porous nitrogen-doped carbon particles and a binder; the porous nitrogen-doped carbon particles are loaded with fluorine-containing sodium salt and a metal catalyst, and the surfaces of the porous nitrogen-doped carbon particles are coated with polymers. According to the current collector, in-situ construction and dynamic repair of NaF-rich SEI are promoted through the core-shell structure design, long-term, uniform and stable deposition of sodium ions on the current collector can be achieved, the coulombic efficiency of a negative-electrode-free sodium battery is improved, and the cycle life of the negative-electrode-free sodium battery is prolonged.

The invention relates to the technical field of batteries, in particular to a negative plate and a lithium ion secondary battery comprising the negative plate. Comprising a negative electrode current collector and a negative electrode active layer, the negative electrode active layer comprises a first active layer, the first active layer comprises a silicon-carbon material, and the silicon-carbon material comprises first silicon-carbon particles and second silicon-carbon particles; the sphericity degree of the first silicon-carbon particles is 0.8-1, the average particle size of the first silicon-carbon particles is 5-20 [mu] m, and the mass content of silicon is 30-60%; the second silicon carbon particles comprise secondary particles formed by a plurality of primary spherical particles; the degree of sphericity of the primary spherical particles is 0.8-1, and the average particle size of the primary spherical particles is 100 nm to 2.5 microns; the average particle size of the second silicon-carbon particles is 5-36 [mu] m, the sphericity is 0.35-0.79, and the mass content of the silicon element is 25-55%. Comprising the negative plate disclosed by the invention has relatively high energy density and also has relatively excellent cycle performance and rate capability.

The application relates to the technical field of lithium / sodium ion battery negative electrode materials, in particular to a phosphorus-based negative electrode material with a solid electrolyte interface and a preparation method and application thereof, the method comprises the following steps: mixing phosphorus powder, a carbon material and a metal fluoride and performing ball milling to obtain a composite negative electrode material; and performing sieving treatment on the composite negative electrode material to obtain the phosphorus-based negative electrode material. According to the application, the metal fluoride is doped to in-situ construct a solid electrolyte interface with high strength and high lithium ion / electron transmission, so that the cycle stability and the rate performance of the battery are improved. When the lithium ion battery is discharged, the metal fluoride can in-situ construct a solid electrolyte interface rich in fluorinated lithium with high Young's modulus and lithium-metal alloy with high ion / electron conductivity on the surface of phosphorus-carbon particles prior to phosphorus-carbon lithium intercalation, the solid electrolyte interface can enhance the strength of the solid electrolyte interface by means of the fluorinated lithium with high Young's modulus, so as to inhibit the expansion of the phosphorus-carbon negative electrode, and the cycle stability is improved.

The invention discloses a negative electrode material, a negative electrode plate prepared from the negative electrode material, and a secondary battery, and belongs to the technical field of electrochemical energy storage. And the size of the silicon-carbon particles and the thickness of the coating layer are synchronously regulated and controlled based on the particle size difference of the graphite particles, so that the material not only can realize ideal cycle stability when being applied to the negative electrode material of the secondary battery, but also has excellent floating charge performance.

The invention provides a silicon negative pole piece, a preparation method thereof and a solid-state battery. The silicon negative electrode piece comprises a negative electrode current collector and silicon negative electrode slurry coated on the surface of the negative electrode current collector, the silicon negative electrode slurry comprises a solid electrolyte, nano silicon, mixed silicon carbon, a conductive agent, a binder and a solvent, the mixed silicon carbon comprises first silicon carbon and second silicon carbon with different particle sizes, the particle size distribution D50 of the solid electrolyte is smaller than the particle size distribution D50 of the first silicon carbon, and the particle size distribution D50 of the first silicon carbon is smaller than the particle size distribution D50 of the second silicon carbon. According to the silicon negative electrode plate provided by the invention, through compounding of silicon carbon with different particle sizes and the solid electrolyte, more expansion space is provided for nanometer silicon, and the technical effect of effectively reducing the expansion rate of the silicon negative electrode plate is achieved.

The invention provides a composite silicon-carbon negative electrode material and a preparation method thereof, a negative electrode plate and a battery. The composite silicon-carbon negative electrode material comprises a silicon-carbon composite core, and a gradient pore carbon buffer layer and a dynamic self-healing binder layer which sequentially coat the surface of the silicon-carbon composite core, a branched carbon nanostructure grows in the pore wall of the gradient pore carbon buffer layer, the dynamic self-healing binder layer partially permeates into the pores of the gradient pore carbon buffer layer, the dynamic self-healing binder layer contains dynamic disulfide bonds, and the dynamic self-healing binder layer comprises a composite binder and a conductive high-molecular polymer. According to the invention, the gradient pore buffer layer is arranged on the surface of the silicon-carbon particles, and meanwhile, the self-healing binder containing dynamic disulfide bonds is used for permeation filling, so that three-dimensional cooperative regulation and control of graded dissipation of expansion stress, self-repairing of microcracks and ion / electron dual-path conduction are realized; the three core problems of electrode pulverization caused by volume expansion, interface impedance sharp increase and long circulation capacity attenuation are thoroughly solved.

In general, the present invention relates to a charged sorbent material. In particular, but not exclusively, the present invention relates to a charged adsorbent material comprising a porous carbon material and charged non-carbon particles within the pores of the porous carbon material. The invention also relates to a method of manufacturing a charged adsorbent material and to a method of removing adsorbates from a fluid by contacting the fluid with the charged adsorbent material.

Example embodiments include low-resistance positive electrodes, and rechargeable lithium batteries including the same. The positive electrode includes a positive electrode current collector, and a positive electrode active material layer on the positive electrode current collector. The positive electrode active material layer includes a positive electrode active material in a concentration of about 95.5 wt % to about 99 wt %, a binder in a concentration of about 0.5 wt % to about 1.5 wt %, and a conductive material in a concentration of about 0.5 wt % to about 3 wt %. The conductive material includes nano-carbon particles and carbon nano-tubes. A weight ratio of the carbon nano-tubes to the nano-carbon particles is in a range of about 1.5 to about 3.5.

A method of making porous carbon particles is disclosed. The method includes: (A1) making a solution including a magnesium organic salt composition; (A2) precipitating particles of the magnesium organic salt composition from the solution; (A3) pyrolyzing the particles of the magnesium organic salt composition to form precursor composite particles including carbon and at least one magnesium compound; and (A4) selectively removing the magnesium compound(s) from the precursor composite particles to convert the precursor composite particles to the porous carbon particles. In some implementations, the at least one magnesium compound includes MgO. A related method of forming silicon-carbon composite particles is also disclosed. Porous carbon particles, silicon-carbon composite particles, anode electrodes, lithium-ion rechargeable batteries, and other related processes and components are also disclosed.

The invention discloses straw carbon-based carbon particles and a manufacturing device and method, and relates to the technical field of agricultural ecological environmental protection equipment.The method comprises the following steps that S1, straw is subjected to component separation treatment, and a liquid component, a carbonized precursor rich in lignin and a fiber base material containing cellulose are obtained; s2, performing carbonization treatment on the carbonized precursor to obtain biochar; dissociating the fiber base material to obtain a fiber inner core material; s3, the liquid component serves as an adhesive, the fiber inner core material serves as a particle inner core, biochar serves as a coating outer layer, and carbon particles of a core-shell structure are prepared through a forming technology. Straw is subjected to component separation before carbonization, directional utilization of all components of straw is achieved, compared with an existing mode that straw is directly carbonized and returned to the field, the carbon particles are more environmentally friendly, and the cost is reduced. The carbon particles prepared by the method are beneficial to subsequent fermentation and field application, can reduce the risk of secondary pollution such as dust raising, are beneficial to regulation and control of the soil carbon release process, and improve the comprehensive utilization efficiency of straws.

The invention provides a sodium-ion battery negative pole piece and a sodium-ion battery, and relates to the field of sodium-ion batteries. The negative pole piece comprises a base material, a first hard carbon layer and a second hard carbon layer, the first hard carbon layer is arranged between the base material and the second hard carbon layer; the first hard carbon layer and the second hard carbon layer respectively and independently comprise the following raw materials in percentage by mass: 80-97% of hard carbon particles, 1-8% of a conductive agent, 1-6% of a binder and 1-6% of a dispersing agent, wherein the total mass of the raw materials of the first hard carbon layer and the second hard carbon layer is 100%; wherein the particle size of the hard carbon particles in the first hard carbon layer is larger than that of the hard carbon particles in the second hard carbon layer; the interlamellar spacing of the hard carbon particles in the first hard carbon layer is smaller than the interlamellar spacing of the hard carbon particles in the second hard carbon layer. According to the structural design, differentiated transmission and storage of sodium ions in different active layers are realized, so that the energy density, the rate capability and the cycling stability of the negative electrode material are synergistically optimized, and the comprehensive performance of the sodium ion battery is comprehensively improved.

This invention provides a silicon anode sheet, its preparation method, and a solid-state battery. The silicon anode sheet of this invention comprises: a negative electrode current collector and a silicon anode slurry coated on the surface of the negative electrode current collector. The silicon anode slurry comprises a solid electrolyte, nano-silicon, mixed silicon carbon, a conductive agent, a binder, and a solvent. The mixed silicon carbon comprises a first silicon carbon and a second silicon carbon with different particle sizes. The particle size distribution D of the solid electrolyte is... 50 Particle size distribution D smaller than that of first silicon-carbon 50 And the particle size distribution D of the first silicon-carbon 50 Particle size distribution D smaller than that of second silicon-carbon 50 The silicon anode electrode provided by this invention, through the compounding of silicon-carbon particles of different sizes and solid electrolytes, provides more expansion space for nano-silicon, thereby effectively reducing the expansion rate of the silicon anode electrode.

The invention provides a silicon-carbon material and a preparation method thereof, a secondary battery and an electronic device, the silicon-carbon material comprises a carbon skeleton and silicon particles located in holes of the carbon skeleton, the silicon-carbon material comprises first silicon-carbon particles and second silicon-carbon particles, the silicon-carbon material with the particle size of R1 is the first silicon-carbon particles, R1 is greater than or equal to 3 microns and less than or equal to 6 microns, and R2 is greater than or equal to 3 microns and less than or equal to 6 microns. The average elastic modulus E1 of the first silicon carbon particles is greater than or equal to 30GPa and less than or equal to 65GPa; the silicon-carbon material with the particle size of R2 is second silicon-carbon particles, R2 is more than 6 microns and less than or equal to 15 microns, the average elastic modulus of the second silicon-carbon particles is E2, and E2 is more than or equal to 68 GPa and less than or equal to 168 GPa. The silicon-carbon material provided by the invention can improve the cycle performance of the secondary battery and improve the expansion of the secondary battery.

The invention discloses a method for preparing brown aluminum oxide by smelting chromium-aluminum spinel. The method comprises the following steps: crushing the chromium-aluminum spinel into chromium-aluminum spinel particles; the chromium-aluminum spinel particles and the carbon particles are mixed, and a mixture is obtained; putting the mixture into an electric arc furnace for bottoming and compacting; electrifying and smelting by using a three-phase graphite electrode; after smelting is completed, cooling water is continuously introduced into the electric arc furnace for cooling for a period of time, and then natural cooling is conducted; and disassembling the furnace, cleaning and separating brown aluminum oxide and high-carbon chromium metal, and packaging. According to the method, chromium trioxide in the chromium aluminate spinel is reduced into high-carbon metal chromium by adopting a carbon reduction smelting method, so that most of chromium trioxide is removed, a generated aluminum-containing product meets the impurity-containing requirement of brown aluminum oxide, and the high-carbon metal chromium is conveniently separated from the brown aluminum oxide by utilizing the characteristic that the density of the generated high-carbon metal chromium is greater than that of the brown aluminum oxide; the technological process is greatly simplified, and the production cost is saved.

The invention relates to a primary cathode layer preparation composition comprising a low molecular weight polyacrylic binding agent and carbon particles. The invention also relates to the use of this composition for preparing a cathode, as well as the cathode itself, which can be used for manufacturing secondary battery cells.

The invention provides a molten iron desulfurizing agent after steel scrap is added into a ladle. The molten iron desulfurizing agent is used for carrying out pretreatment desulfurization after the steel scrap is added into the ladle; the molten iron desulfurizing agent comprises lime, fluorite and carbon particles, wherein the mass percent of the lime is 30-35%, the mass percent of the fluorite is 20-25%, and the mass percent of the carbon particles is 40-50%. The problems that in the prior art, under the high scrap steel ratio, scrap steel of a ladle is not molten, the molten iron fluidity is poor, the desulfurization efficiency is low, and the consumption of important components (lime and fluorite) of a desulfurizing agent is large can be solved. The invention further provides a molten iron desulfurization method after the scrap steel is added into the ladle, pretreatment desulfurization is carried out after the scrap steel is added into the ladle, and the molten iron desulfurization agent after the scrap steel is added into the ladle is adopted for desulfurization.

This invention relates to an inversion method for the composition of black carbon aerosol coatings of different particle sizes, comprising: sampling black carbon aerosol coatings and screening out black carbon particles with specific electromobility particle sizes; measuring the scattering coefficient, absorption coefficient, and single scattering albedo in multiple wavelength bands; passing the black carbon particles into a thermal ablation tube to remove the black carbon aerosol coating, and then measuring the electromobility particle size of the black carbon core; establishing a lookup table of optical property calculation results; constructing an objective function and searching the lookup table of optical property calculation results to obtain the equivalent complex refractive index of the coating that minimizes the objective function; calculating the complex refractive index of the coating after uniformly mixing different coating components according to different volume fractions based on various theories, and constructing a lookup table of complex refractive index calculation results; constructing an objective function, and searching the lookup table of refractive index calculation results based on the equivalent complex refractive index of the coating to obtain the volume fractions corresponding to different coating components that minimize the objective function.

The utility model provides a filtering device for recovering palladium particles extracted from chemical liquid medicine, and belongs to the technical field of filtering equipment. The filtering device for recovering the extracted palladium particles in the chemical liquid medicine comprises a ton barrel, a supporting frame, a glass fiber reinforced plastic tank, a water distributor, a liquid inlet mechanism, a liquid return mechanism and a filtering mechanism, the filtering device for recovering and extracting the palladium particles in the chemical liquid medicine can circularly filter generated palladium-containing waste liquid at any time to extract palladium ions in the palladium-containing waste liquid and independently store the palladium ions, the problems of waste liquid storage and personnel operation are effectively solved, the efficiency is improved, the extracted palladium-containing carbon particles can be used for extracting and recovering palladium and gold, the income is increased, and in addition, the filtering device is suitable for popularization and application. The palladium-containing waste liquid can be continuously treated, that is, shutdown is not needed, the glass fiber reinforced plastic tank does not need to be integrally disassembled, carbon particles can be conveniently replaced, the replacement efficiency of the carbon particles is improved, and better use experience is brought to a user.

The application belongs to the technical field of electrode materials, and particularly relates to a silicon-carbon negative electrode material based on vertical graphene and a preparation method and application thereof. The method comprises the following steps: preparing mixed slurry containing nanosilicon-based material and micrometer graphite material; performing spray drying treatment to obtain silicon-carbon composite particles; performing sintering treatment on the silicon-carbon composite particles under a protective atmosphere, and performing screening to obtain micrometer porous silicon-carbon particles; and performing chemical vapor deposition treatment on the porous silicon-carbon particles under the condition of containing carbon source gas and etching atmosphere, to obtain the silicon-carbon negative electrode material based on vertical graphene. Vertical graphene nanosheets are grown in the internal pores and outer surface of the porous silicon-carbon particles, to form a developed and robust conductive network with high mechanical strength and structural stability, and to relieve the volume expansion of the silicon-based material in the lithium intercalation process. Meanwhile, the problem of low bulk density of the silicon-based material is solved in the secondary granulation process, the volume expansion effect of the silicon-based material is inhibited, and the rate charge-discharge performance is improved.

The invention relates to a growth device and a growth method of silicon carbide crystals. The growth device comprises a crystal growth assembly, the crystal growth assembly comprises a raw material placement area, a gas guide structure area and a seed crystal placement area which are sequentially arranged from bottom to top; the air guide structure area comprises at least two layers of air guide units arranged in the vertical direction; the air guide units on the same layer comprise a plurality of air guide elements which are arranged in an array; each air guide element is of an integrated combined structure and comprises a first table body and a second table body. The first bottom face of the first table body and the first bottom face of the second table body are oppositely attached, and the top, away from the first table body, of the second table body is provided with a concave part. According to the growth device, the gas guide structure area is arranged in the growth device, and the structural design of the gas guide structure area is used for dredging the flowing direction and the flowing speed of component gas flow, and meanwhile, carbon particle impurities in raw materials are correspondingly blocked, so that the yield and the quality of silicon carbide crystals are improved.

The invention provides a negative electrode material, a secondary battery and an electronic device, the negative electrode material comprises silicon carbon particles, the perimeter of the cross section of each silicon carbon particle is L [mu] m, the contour line of the cross section comprises at least one linear segment feature part, the length of the feature part is X [mu] m, and X / L is greater than or equal to 0.2 and less than or equal to 0.8. The contour line of the section of the silicon-carbon particle in the negative electrode material comprises at least one linear segment characteristic part and meets the condition that X / L is greater than or equal to 0.2 and less than or equal to 0.8, so that the compaction density of the silicon-carbon particle can be improved, and the cycle capacity retention performance and the low-temperature load performance of the secondary battery can be improved at the same time.

The invention relates to a high-temperature carbon particle cooling device and system, the device comprises a particle channel and at least one heat exchange channel arranged in the particle channel, and the heat exchange channel is arranged along the axial direction of the particle channel. The heat exchange channel comprises at least one heat exchange coil pipe which is coiled in a spiral shape. When the heat exchange channel comprises a plurality of heat exchange coil pipes, the heat exchange coil pipes are coaxially arranged, the heat exchange coil pipes are connected in parallel or in series or in series-parallel connection in a mixed mode, and the connecting positions of the heat exchange coil pipes are located outside the channel where the high-temperature carbon particles flow. The cooling device recovers waste heat of the high-temperature carbon particles in a high-efficiency and high-grade mode, so that the requirement for other energy sources is reduced, and the comprehensive utilization rate of the energy sources is improved. The joints of the heat exchange coil pipes are all located outside the channels where the particles flow, so that the joints are prevented from being damaged due to direct long-term contact with the high-temperature carbon particles, and the situation of heat exchange medium leakage caused by the quality problem of the joints in the channels where the high-temperature carbon particles flow is avoided.