4652results about "Carbon compounds" patented technology

The invention provides a biomass-derived spherical porous carbon material and a preparation method thereof, and a silicon-carbon negative electrode material and a preparation method thereof, and relates to the field of lithium ion batteries. The preparation method of the biomass-derived spherical porous carbon material comprises the following steps: carrying out pre-carbonization treatment on vinasse to obtain pre-carbonized vinasse, mixing the pre-carbonized vinasse with an acidic solution, and washing with water until the mixture is neutral to obtain pre-treated vinasse; mixing the pretreated vinasse with a pore-forming agent, a binder and water to prepare slurry, and performing spray drying on the slurry to obtain a spheroidized precursor; carrying out carbonization treatment on the spheroidized precursor; washing the carbonized spheroidized precursor with water until the spheroidized precursor is neutral, and drying the spheroidized precursor to obtain an intermediate; and activating the intermediate with water vapor to obtain the biomass-derived spherical porous carbon material. The material with a regular spherical and porous structure can be prepared, the material can be used for preparing a silicon-carbon negative electrode material with a stable structure, and the electrochemical performance of the silicon-carbon negative electrode material is improved.

The invention discloses a method for preparing a hard carbon negative electrode material, the hard carbon negative electrode material and a sodium-ion battery, belongs to the technical field of energy materials, and solves the problems that the existing hard carbon negative electrode material is complex in microstructure and indefinite in sodium storage mechanism, and the traditional preparation method cannot effectively increase the internal closed pore volume, so that the high-platform capacity development is limited, and the sodium-ion battery is difficult to use. And the improvement of the energy density of the sodium-ion battery is restricted. Comprising the following steps: drying and crushing coconut shells; pre-carbonizing the treated coconut shell to obtain a carbonized material; uniformly mixing the carbonized material with an activating agent to obtain a mixed material; carrying out an activation reaction to obtain a biomass-based porous carbon mixed material; washing until the solution is neutral; carrying out activation reaction on the washed material to obtain the biomass-based porous carbon material with high specific surface area and high microporosity; and carrying out variable-temperature chemical vapor deposition reaction to obtain the hard carbon negative electrode material. The method is suitable for a large-scale preparation scene of the hard carbon negative electrode material with abundant closed pores.

The invention belongs to the technical field of activated carbon preparation, and particularly discloses a preparation device and method for increasing the micropore proportion of activated carbon through segmented activation. A steam activation section and a carbon dioxide activation section are arranged in an activation furnace of the device, and a material channel penetrates through the steam activation section and the carbon dioxide activation section; and a through hole penetrating through the wall thickness is formed in the side wall of the material channel. Materials are subjected to primary activation through the steam activation section, so that more mesopores and macropores are quickly formed in the materials, and then the materials are subjected to secondary activation through the carbon dioxide activation section, so that micropores are further formed in the materials, the number and proportion of the micropores are increased, and the desulfurization performance of activated carbon is improved. According to the technical scheme, the pore structure of the activated carbon is regulated and controlled in a segmented activation mode, the micropore proportion is increased, and therefore the desulfurization performance of the activated carbon is improved, the technological process is simple, meanwhile, waste heat of flue gas obtained after incineration and purification can be recycled, energy is saved, efficiency is high, and industrial application is easy.

The invention discloses a nickel-based alloy composite plate and a preparation method thereof, and belongs to the technical field of nickel-based alloys, the nickel-based alloy composite plate comprises a stainless steel bottom plate and a nickel-based alloy plate, and the nickel-based alloy plate comprises, by weight, 52-58 parts of nickel powder, 17-21 parts of molybdenum powder, 8-12 parts of copper powder, 7-9 parts of boron powder, 2-3 parts of modified hafnium carbide powder, 4-7 parts of an alloy reinforcing agent and 2-3 parts of a fluxing agent. The modified hafnium carbide prepared from hafnium oxide and nano carbon powder successfully replaces metal hafnium with high cost in the traditional process; and meanwhile, the actual adding proportion of the modified hafnium carbide in the nickel-based alloy plate is greatly reduced, the cost of industrial mass production is doubly reduced from the two aspects of raw material selection and dosage control, and the economic requirement of large-scale production is better met.

The invention belongs to the field of battery negative electrode materials, and particularly relates to a sodium ion battery hard carbon negative electrode material and a preparation method thereof. The preparation method comprises the following steps: mixing phenolic resin and asphalt, and carrying out pre-oxidation treatment to obtain a pre-oxidized precursor; and under a protective atmosphere, sequentially carrying out pre-carbonization treatment and carbonization treatment on the precursor subjected to the pre-oxidation treatment to obtain the sodium-ion battery hard carbon negative electrode material. In the pre-oxidation process, the asphalt and the phenolic resin are crosslinked, so that the foaming phenomenon of the phenolic resin in the subsequent carbonization process is reduced, the escape of small molecule gas in the phenolic resin is inhibited, the surface defects of the phenolic resin-based derived hard carbon material are further reduced, more closed pores are formed, and the sodium storage performance is improved. Meanwhile, a graphite-like carbon layer formed in the high-temperature carbonization process of the asphalt can be effectively inserted into a rigid framework of the phenolic resin hard carbon to construct a three-dimensional continuous conductive network, so that the electronic conductivity of the phenolic resin-based hard carbon is greatly improved, and the electrochemical performance of the sodium ion battery is improved.

To provide a method for fixing carbon dioxide by which bubbles of carbon dioxide introduced into a solution can be made fine without increasing energy consumption.SOLUTION: A carbon dioxide fixation method comprising a precipitation step of introducing a gas containing carbon dioxide into a carbon dioxide fixation solution in which calcium ions are eluted to generate bubbles of the gas containing carbon dioxide in the carbon dioxide fixation solution, thereby reacting the calcium ions eluted in the carbon dioxide fixation solution with carbon dioxide to precipitate calcium carbonate, wherein the carbon dioxide fixation solution is an aqueous solution in which calcium ions are eluted in an aqueous solution of methylparaben.SELECTED DRAWING: Figure 1

The application discloses a MnFe2O4 / GO wave-absorbing aerogel with a directional aperture structure and a preparation method thereof, belongs to the technical field of wave-absorbing material preparation, and is characterized in that manganese ferrite (MnFe2O4) magnetic particles are uniformly loaded on the surface of graphene to obtain a graphene aerogel with a three-dimensional loose porous structure and magnetic particle assembly; the MnFe2O4 is prepared by using a low-temperature co-precipitation method, and the MnFe2O4 / GO wave-absorbing aerogel is prepared by combining directional freezing and heat treatment, and the method is mild and simple. The application improves the impedance mismatch problem of the graphene material, enhances the magnetic loss of the material, and obtains a novel porous aerogel wave-absorbing material which has both dielectric loss and magnetic loss by introducing the manganese ferrite.

The invention discloses a method for separating, purifying and regenerating waste battery negative electrode powder, which belongs to the field of battery recycling and regenerating, and mainly comprises the following process steps of: ball-milling and screening waste battery negative electrode pieces into certain granularity, soaking the waste battery negative electrode pieces in alkali liquor and an impurity removal agent, and stirring for reaction and separation to obtain a negative electrode powder wet material and a copper ion solution; carrying out drying demagnetization and infrared irradiation treatment on the wet negative electrode powder to obtain regenerated negative electrode powder; and the copper ion solution is subjected to extraction, back extraction and reduction to obtain crude copper, and the crude copper is subjected to vacuum distillation to obtain an electronic-grade copper product. Wherein the impurity removal agent comprises an oxidizing agent, the oxidizing agent oxidizes elemental copper and forms soluble substances under the action of alkali liquor, and the excellent separation effect is achieved. The negative electrode powder treatment comprises infrared irradiation treatment, decomposition of an adhesive can be achieved through the dual effects of heat irradiation and heat conduction, the volume heating effect is formed through scattering, surface crusting is effectively avoided, the adhesive can be efficiently removed, and the quality and the recycling efficiency of the regenerated negative electrode powder are guaranteed.

The invention discloses a method for preparing tantalum carbide powder by carburization based on a double-effect synergistic effect of molten salt activation and catalytic decomposition, which comprises the following steps: mixing molten salt powder A and tantalum powder to obtain mixed powder, heating the mixed powder to 600-1200 DEG C for activating treatment to obtain activated tantalum powder, separately placing molten salt powder B and the activated tantalum powder in a heating furnace, heating the heating furnace to 100-200 DEG C, heating the heating furnace to 100-200 DEG C, and heating the heating furnace to 100-200 DEG C to obtain the tantalum carbide powder. The heating furnace is heated to enable the molten salt powder B to be converted into molten salt, then carbon source gas firstly flows through the molten salt to form active gas, the active gas makes contact with the activated tantalum powder to react, and the tantalum carbide powder is obtained. On one hand, the tantalum powder is subjected to surface activation treatment through the molten salt, and the reaction activity of the tantalum powder is improved; the molten salt medium assists in organic gas decomposition, the thermal decomposition efficiency of the organic gas is improved, the production energy consumption is effectively reduced under the cooperation of the molten salt auxiliary gas decomposition and the molten salt activation tantalum powder process, and the product purity and uniformity are improved.

The present invention relates to the technical field of chemical equipment, particularly to a porous carbon activation method, which comprises: inputting a carbon raw material and a preset reaction gas into a fluidized bed reaction device to carry out an activation reaction to prepare porous carbon, and the fluidized bed reaction device comprises a feeding tank, a raw material preheating furnace, a reactor, a heating unit and a discharging tank, a gas distributor, a stirring paddle, a cyclone separator and / or a metal filter column are arranged in the reactor; the activation method comprises the following steps: S1, conveying a carbon raw material to a raw material preheating furnace, and preheating in an inert atmosphere; s2, conveying the preheated carbon raw material into a reactor, introducing reaction gas under a preset activation condition, and carrying out an activation reaction to obtain activated porous carbon; s3, under the protection of an inert atmosphere, conveying the activated porous carbon to a discharging tank, cooling, and discharging to obtain a porous carbon product; through stepped activation and multi-section temperature control design, the problems of poor product uniformity and high energy consumption of a traditional process are solved.

The utility model relates to the technical field of mobile phone heat dissipation films, in particular to a high-heat-conduction mobile phone middle frame graphite heat dissipation film which comprises a heat dissipation film body, the heat dissipation film body sequentially comprises matte black single-faced adhesive tape, a high-heat-conduction graphite layer and double-faced adhesive tape from top to bottom, the high-heat-conduction graphite layer is formed by stacking low-temperature carbonization layers and is 0.2 mm in thickness, and the high-heat-conduction graphite layer is formed by stacking low-temperature carbonization layers. The low-temperature carbonization layer is formed by graphene through low-temperature carbonization treatment, the heat conductivity coefficient reaches 2000-2100 W / M.K, energy consumption is reduced through low-temperature treatment, the production cost is indirectly reduced due to the low temperature requirement, the graphene is subjected to low-temperature carbonization treatment, the lattice defect density is reduced, and the stability of the heat conductivity coefficient is ensured; and meanwhile, the 0.2 mm high-thermal-conductivity graphite layer is formed by stacking the low-temperature carbonization layers, so that the occupied space of the heat dissipation film body in the middle frame is reduced.

The invention belongs to the technical field of underground hydrogen storage, and particularly relates to a method for improving underground hydrogen storage capacity by stabilizing hydrogen foam through a porous carbon material, which comprises the following steps: step 1, preparing a hydrophobic modified porous carbon material: preparing the porous carbon material by using biomass waste as a raw material through a carbonization-activation process; carrying out hydrophobic modification treatment on the porous carbon material to enable the water contact angle of the material to reach more than 90 degrees; step 2, preparing a surfactant solution; step 3, preparing a porous carbon-surfactant composite system; and fourthly, hydrogen foam is generated and injected, wherein hydrogen and the porous carbon-surfactant composite system are fully mixed according to the gas-liquid volume ratio of 1: 1-10: 1, and then the mixture is injected into the stratum. By means of the method, the stability of hydrogen foam can be remarkably improved, the hydrogen storage efficiency and the hydrogen recovery rate are improved, and therefore the underground hydrogen storage amount is greatly increased.

The invention relates to the technical field of wave-absorbing materials, in particular to a preparation method of an MXene-NiO-PPy ternary composite wave-absorbing material. The invention provides a preparation method of an MXene-NiO-PPy ternary composite wave-absorbing material, which comprises the following steps of: etching titanium aluminum carbide powder through a LiF / HCl mixture, and performing ultrasonic stripping to prepare a uniform dispersion of MXene nanosheets; the preparation method comprises the following steps: dispersing MXene nanosheets in a solution of water and absolute ethyl alcohol, and adding a pyrrole monomer and a FeCl3. 6H2O aqueous solution for reaction; after the reaction, washing is performed to obtain a PPy-MXene composite material; the preparation method comprises the following steps: by taking NiCl2. 6H2O as a nickel source and sodium oxalate as a precipitator, preparing NiO nanowires by adopting a hydrothermal method combined with a calcining process; the invention discloses a preparation method of an MXene-NiO-PPy ternary composite wave-absorbing material.According to the method, the MXene-NiO-PPy ternary composite wave-absorbing material with rich heterogeneous interfaces and a porous micro-nano structure is constructed, cooperation of dielectric loss, magnetic loss and interface polarization loss is achieved, and finally the light, efficient and broadband wave-absorbing performance is obtained.

The invention belongs to the field of electrochemical energy storage material and device manufacturing, and particularly relates to a method for preparing super-capacitor carbon through ultrasonic atomization, the super-capacitor carbon and a super-capacitor electrode. The method comprises the following steps: preparing a carbonized material, a bridging conductive agent and a composite binder into slurry, performing ultrasonic atomization to form spherical liquid drops, and performing drying, pre-activation and CO2 etching to prepare the supercapacitor carbon with an integrated three-dimensional network. Through a synergistic process of spherical template construction-networked reconstruction-etching modification, controllable transformation of a material structure is realized, and the tap density, a pore channel system and a conductive network of the electrode are optimized, so that the electrode with high specific capacity, excellent rate capability and cycling stability is obtained, and the process is environment-friendly and coherent and is suitable for large-scale production.

The invention discloses a surface oxidation monatomic nano-alloy catalyst as well as a preparation method and application thereof, and belongs to the technical field of advanced nano-energy materials and electro-catalysis. A surface-oxidized monatomic nano-alloy catalyst comprises a hydroxylated carbon nanotube carrier and bimetallic nano-alloy particles loaded on the hydroxylated carbon nanotube carrier, in the bimetallic nano-alloy particles, non-noble metal elements are dispersed in noble metal nano-particles in a monatomic form, the size of the bimetallic nano-alloy particles is 3-4 nm, and the surface-oxidized monatomic nano-alloy catalyst is prepared from a surface-oxidized monatomic nano-alloy catalyst. An oxide layer with the thickness of 0.3-0.6 nm is arranged on the surface of the bimetallic nano-alloy particle; the loading amount of the noble metal is 5-15wt%. Ruthenium and other non-noble metal elements are alloyed and anchored on the carbon material substrate, the conductivity of the catalyst can be greatly improved, the size of alloy particles is accurately controlled within the range of 3-4 nm, active sites can be exposed to the maximum extent, and structural stability is considered.

The invention relates to the technical field of porous carbon materials, and discloses a preparation method of phenolic resin-based porous carbon based on synergistic activation of water vapor and carbon dioxide. The key point of the method is to construct a multi-dimensional process of'ZIF-8 (at) Ni-MOF derived bifunctional material pore forming-nitrogen / nickel co-doping + dynamic pressure-double-gas synergistic etching + Ti < 3 > C < 2 > T < x > MXene gradient modification '. The MOF derivative material provides regular initial pore channels and active sites, and precise customization of the pore diameter of 0.7-50 nm is realized by combining dual-gas characteristic complementation and dynamic pressure regulation and control; and MXene modification synchronously improves the conductivity and the interface bonding force. The micropore rate is greater than or equal to 88%, the specific surface area is greater than or equal to 2200m < 2 > / g, the total pore volume is greater than or equal to 1.3 cm < 3 > / g, and the process is free of chemical waste liquid pollution. When the material is applied to a lithium battery silicon-carbon negative electrode, the capacity retention rate after 500 cycles is greater than or equal to 85%, and the industrialization value is high.

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 provides a treatment method for recovering high-purity graphite from black powder leaching residues. The treatment method comprises the following steps: removing impurity elements in graphite from the black powder leaching residues in a Joule heat flash evaporation manner; the black powder leaching residues obtained after impurity removal are put into a ball mill, liquid phenolic resin is added, full mixing is conducted, and ball milling is conducted; and putting the ball-milled mixture into flash evaporation Joule thermal equipment, and carbonizing and graphitizing the phenolic resin to obtain regenerated graphite. According to the method, the temperature of the black powder leaching residues can be increased within an extremely short time, metal impurities in the black powder leaching residues are gasified, and impurities in graphite are removed. Phenolic resin is used for carbonization and graphitization, generated disordered carbon can fill up particle cracks in waste graphite and internal lattice defects, a conductive network among graphite particles is established, a compact carbon layer is formed on the surface of graphite, and graphite structure transformation can also be induced in the step. The regenerated graphite obtained by the method is similar to commercial graphite in capacity and good in cycling stability.

The invention provides a preparation method for preparing porous carbon based on an aerogel method, the porous carbon and application of the porous carbon, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: mixing polyhydroxy phenol, aromatic aldehyde, acrylamide, graphene oxide and lithium salt according to a mass ratio of 100: (50-200): (5-30): (1-5): (1-5), carrying out hydrothermal reaction at 100-200 DEG C for 1-6 hours, and freeze-drying at-40 DEG C to obtain a hydrogel precursor; and carbonizing the precursor in organic heteroatom gas at 500-800 DEG C, mixing the intermediate with alkali according to the ratio of 100: (100-500), activating at 900-1100 DEG C, pickling and drying to obtain the porous carbon. The conductivity of the product is improved by means of graphene, lithium salt and heteroatoms, and the aerogel method obtains large aperture, has the characteristics of low impedance, high first efficiency and small charge-discharge expansion, and can be efficiently applied to silicon-carbon materials.

The invention discloses high-performance asphalt-based porous carbon and a preparation method and application thereof.The preparation method comprises the following steps that refined asphalt is heated and stirred, then oxygen-containing gas is introduced, and oxygen-containing modified pre-oxidized refined asphalt is obtained through segmented heating oxidation treatment; heating the pre-oxidized asphalt to different temperatures in different stages in an inert atmosphere for pre-carbonization; placing the pre-carbonized product in a hydrogen-containing mixed atmosphere, and dynamically regulating and controlling the carbonization process according to asphalt components; and mixing the carbonized product with potassium hydroxide and sodium hydroxide mixed alkali, carrying out multi-temperature-zone stepped activation, washing, and drying to obtain the asphalt-based porous carbon. According to the invention, refined pitch is directly used as a carbon source raw material, pre-oxidation is carried out to obtain a partial oxygen-containing hard carbon structure, low-temperature pre-carbonization is carried out to obtain a carbonized precursor with very few volatile components, porous carbon is subjected to moderate graphitization through carbonization, the conductivity of a skeleton is improved, the skeleton is further subjected to pore forming through activation, and the high-performance porous carbon material is obtained.

The invention discloses modified biogas residue-based hydrothermal carbon, a preparation method thereof and a dry digestion method for kitchen waste, and belongs to the technical field of waste organic matter recycling. The preparation method comprises the following steps: soaking biogas residues in a phosphoric acid solution to obtain pretreated biogas residues; mixing the pretreated biogas residues, transition metal salt, biochar loaded with vitamin B12 and water with the mass being 8-15 times that of the pretreated biogas residues, and performing hydrothermal reaction for 1-4 hours under the conditions that the temperature is 180-250 DEG C and the pressure is 1.5-4 MPa to obtain a hydrothermal product; and activating the hydrothermal product for 1-2 hours under the protective atmosphere of 300-400 DEG C to obtain the modified biogas residue-based hydrothermal carbon. The surface Fe-Cu composite oxide sequentially catalyzes and oxidizes H2S into elemental sulfur and sulfate ions, the vitamin B12-loaded biochar can promote MA directional proliferation, the sulfate ions can competitively inhibit SRB substrate uptake, the quantity ratio of MA to SRB is increased, and the methane production efficiency is effectively improved.

The invention relates to the technical field of preparation of porous carbon materials, in particular to a carbon material with an ultrahigh specific surface area and a preparation method and application thereof, and the preparation method comprises the following steps: ball-milling and mixing a carbon precursor and a chemical activator to obtain a homogeneous mixture; synchronously carbonizing and activating the homogeneous mixture to obtain a carbonized compound; washing and drying the carbonized compound to obtain a carbon material with an ultrahigh specific surface area; the carbon precursor is waste phenolic resin. The waste phenolic resin is efficiently converted into the high-specific-surface-area porous carbon material (super activated carbon) through ball-milling-assisted homogenization and a synchronous carbonization / activation process, and the method has remarkable advantages in the aspects of environmental protection, process efficiency, material performance, application value and the like, not only solves the problem of thermosetting resin recovery, but also improves the recovery efficiency of the thermosetting resin. And the waste resin is converted into a high-added-value carbon material, so that the development of circular economy is promoted, and the dual-carbon strategic target is met.

The invention belongs to the technical field of semiconductor material preparation, and particularly relates to a crucible assembly for synthesizing silicon carbide powder and a synthesis method of the crucible assembly. The crucible assembly comprises an outer crucible, a charging crucible and a supporting ring. The outer crucible is made of isostatic graphite, the side wall of the inner cavity is provided with a gas guide groove, and the bottom and top crucible covers are provided with vent holes; the charging crucible is made of porous graphite and is accommodated in the outer crucible; the support ring is arranged between the two, and the support surface is provided with a groove. Through the synergistic effect of the bottom vent hole, the supporting ring groove, the outer crucible side wall gas guide groove and the top vent hole, a gas channel of bottom gas inlet, side wall flow guide and top gas exhaust is formed. Impurities such as nitrogen adsorbed by the raw materials can be forcibly discharged, and the nitrogen content of the powder is effectively reduced; and meanwhile, excessive heat on the side wall and the bottom of the crucible is taken away through gas flow, the uniformity of a synthetic thermal field is remarkably improved, local excessive carbonization of the powder is avoided, and therefore the purity and consistency of the silicon carbide powder are synchronously improved.

The invention relates to the technical field of impurity removal and purification, in particular to a high-temperature impurity removal and purification method for a graphite material. Obtaining the furnace temperature and the output power at each moment in each monitoring period in each high-temperature purification process and the temperature and the voltage of each induction coil at each moment; calculating a first evaluation value, a power fluctuation degree, a second evaluation value and an evaluation coefficient of each monitoring period; determining the bridging confidence coefficient of each monitoring period in each high-temperature purification process; and the bridging phenomenon occurring in each monitoring period in the high-temperature purification process is evaluated, and the bridging phenomenon existing in the high-temperature purification furnace is eliminated, so that the graphite material is subjected to high-temperature purification. According to the method, the bridging phenomenon in the high-temperature purification furnace can be accurately evaluated, and stable operation of a high-temperature purification process and high-quality purification of a graphite material are ensured.

The invention discloses a fluidized bed reactor for preparing porous carbon through collaborative graded activation of water vapor and CO2 and a method for preparing the porous carbon through collaborative graded activation of the water vapor and the CO2, and belongs to the technical field of material chemical engineering. The fluidized bed reactor is composed of a shell, a fluidization section, a sedimentation section, a porous distribution plate, a gas distribution chamber, a stirring device and a temperature control system, and uniform fluidization and multi-section temperature control of superfine powder are achieved. According to the activation method, steam and CO2 collaborative graded etching pore-forming is adopted, specifically, in the first stage, quick pore-forming is conducted mainly through steam at the temperature of 500-800 DEG C, in the second stage, pore-expanding is conducted cooperatively through steam and CO at the temperature of 700-900 DEG C, and in the third stage, fine control is conducted mainly through CO2 at the temperature of 850-1050 DEG C; the continuous preparation of the high-performance porous carbon with the specific surface area of 1500-2500m < 2 > / g, the pore volume of more than or equal to 0.8 cm < 3 > / g and the 2-10nm mesopores accounting for 20-60% is realized by adjusting the gas velocity, the activation temperature, the activation time and the ratio of water vapor to CO2, the bottlenecks of low specific surface area, single pore diameter, large batch difference and the like of physical activation are solved, and the method is suitable for green and low-cost production of high-end energy storage carbon materials such as supercapacitors, lithium / sodium ion batteries and the like.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a silicon-carbon negative electrode material based on spherical-like resin porous carbon and a preparation method thereof.The method comprises the steps that resin and an emulsifier are fully reacted, solid resin microspheres are obtained after treatment, then high-temperature carbonization is conducted, potassium hydroxide activation is conducted after smashing, and the spherical-like resin porous carbon-based silicon-carbon negative electrode material is obtained; and carrying out acid washing to obtain the spheroidic porous carbon. And the silicon-carbon negative electrode material is obtained after vapor deposition, and the material is particularly suitable for a high-energy-density power battery.

The invention discloses a porous carbon preparation method and a continuous fluidized bed system.The porous carbon preparation method comprises the steps that rice husks and bamboo fibers are mixed and smashed, the smashed rice husks and bamboo fibers are dried and then mixed with a composite activating agent solution to be steeped, and a pretreated material is formed; feeding the pretreated material into a first-stage fluidized bed, and carbonizing the pretreated product in a nitrogen atmosphere to obtain a carbonized product; feeding the carbonized product into a second-stage fluidized bed, introducing saturated steam and CO2 gas into the second-stage fluidized bed in stages, and activating the carbonized product to obtain an activated product; feeding the activated product into a third-stage fluidized bed, introducing methane gas into the third-stage fluidized bed in an inert gas atmosphere, and performing micropore surface modification on the activated product to obtain a modified product; and washing the modified product with a hydrochloric acid solution and deionized water in sequence, and carrying out vacuum drying to obtain a porous carbon product. According to the preparation method of the porous carbon, the micropore development efficiency is improved, and continuous production of the porous carbon with high specific surface area and high micropore proportion is realized.

The invention provides a lithium ion battery positive electrode material and a preparation method and application thereof. According to the lithium ion battery positive electrode material, the lithium ion battery positive electrode material has a core-shell structure, a lithium layered metal oxide, a composite double-phase coating layer and a carbon coating layer are distributed from the center to the surface of the lithium ion battery positive electrode material, and the composite double-phase coating layer is prepared from a fast ion conductor and an oxide. The lithium ion battery positive electrode material provided by the invention solves the problems of limited rate capability and poor cycling stability of a ternary material, improves the capacity retention ratio of a lithium ion battery under high-power charging and discharging conditions, inhibits interface side reaction between an electrode material and an electrolyte, and prolongs the service life of the battery. The invention also provides a preparation method and application of the lithium ion battery positive electrode material.

The invention provides a porous carbon material and a preparation method and application thereof, and belongs to the technical field of lithium battery negative electrode materials. A large number of oxygen-containing functional groups are introduced through oxidation cross-linking modification, generation of an ordered structure of the raw material coal in the carbonization process is controlled, the raw material coal has a disordered structure after carbonization, and the colloid process of the raw material coal in the carbonization process can be regulated and controlled by finely regulating and controlling the temperature rise rate in the oxidation cross-linking process. The porous carbon sample prepared by further activating, pore-forming and purifying is smaller in particle size change after different pressures are applied, higher mechanical strength is shown, and the inhibition effect of the porous carbon on volume expansion of silicon in the long-term circulation process after silicon deposition can be enhanced.

The invention discloses Moraxella roselle MT01 and application thereof in CO2 fixation and / or sediment carbon emission reduction, and belongs to the technical field of microorganisms. According to the invention, a strain of Moraxella roselle MT01 is obtained through screening and identification, and the preservation number is CCTCC (China Center For Type Culture Collection) NO: M 20252028. Through verification, the strain MT01 contains two key carbon sequestration genes, namely fhs and cbbM; whether the strain MT01 has the carbon sequestration capability or not is detected by using isotope, and the result shows that delta 13C exceeds 60 per thousand; the carbon sequestration capability of the strain MT01 is detected by adopting sediment carbon emission reduction, the result shows that the strain MT01 can obviously reduce the emission of CO2 in mangrove forest sediment, and the emission reduction efficiency is about 16.9%. The invention provides new strain selection and technical basis for microbial carbon sequestration.