11257results about "Carbon compounds" patented technology

The invention relates to a waste lithium iron phosphate battery recycling method, in particular to a graded recycling method for lithium, iron, phosphorus and graphite in a waste lithium iron phosphate battery, and belongs to the technical field of lithium ion batteries and resource recycling of the lithium ion batteries. According to the method, the mode that oxidizing roasting and selective leaching are combined is adopted, the leaching rate and selectivity of lithium are effectively improved, the leaching rate of the lithium element is close to 100% under the optimized condition, and limit recovery of the lithium element is achieved; meanwhile, aiming at the problem that iron and phosphorus in the leaching residues are difficult to utilize, a wet ball milling and secondary acid leaching method is combined, phosphorus and iron elements are separated from negative electrode graphite firstly, and graded recovery of iron, phosphorus and graphite is achieved. According to the method, the high recovery rate of lithium is realized, and meanwhile, high-added-value products such as ferric oxide and sodium phosphate are prepared by efficiently recovering ferric phosphate.

To provide a carbon dioxide absorbing composition that is capable of reducing the energy for releasing carbon dioxide and maintaining the carbon dioxide absorption capacity over an extended period.SOLUTION: A carbon dioxide absorbing composition comprises an amine compound (A) and a polyalkylene glycol (B) having a number average molecular weight of 140 or more, wherein the carbon dioxide absorbing composition contains a low molecular weight glycol compound (C) having a number average molecular weight of less than 140 in an amount of 0 to 10 wt.% based on the weight of the polyalkylene glycol (B), and the content of the polyalkylene glycol (B) is 50 wt.% or more and 80 wt.% or less based on the total weight of the amine compound (A), the polyalkylene glycol (B), and the low molecular weight glycol compound (C).SELECTED DRAWING: None

The invention belongs to the technical field of electrochemistry and energy materials, and particularly relates to preparation and application of a high-performance asphalt-based porous carbon material. The preparation method sequentially comprises the following steps of crushing, heat treatment, pre-oxidation, airflow crushing, carbonization, activation, acid washing, water washing and drying. Compared with the prior art, the high-performance asphalt-based porous carbon material at least has the beneficial effects that the high-performance asphalt-based porous carbon material does not use raw materials such as carbon nanotubes and graphene with relatively high cost on the premise of ensuring sufficient specific surface area and sufficient pore volume value, so that the preparation method has outstanding advantages of simplicity and economy.

The invention discloses a carbon-silicon negative electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: S1, carrying out mixed reaction on a lithium source compound, a lanthanum source compound and a titanium source compound to obtain a mixed reactant; mixing the mixed reactant with a carbon source compound, and dispersing and emulsifying to obtain element-doped microspheres; s2, carbonizing the element-doped microspheres in the step S1 to obtain carbides, and activating the carbides to obtain a porous carbon material; and S3, performing silicon deposition on the porous carbon material in the S2 to obtain silicon deposition porous carbon, and performing carbon deposition on the silicon deposition porous carbon to obtain the carbon-silicon negative electrode material. The carbon-silicon negative electrode material disclosed by the invention is high in lithium ion transmission rate, the problem of poor electronic conductivity of silicon is solved, and the electrical property of a battery can be effectively improved.

To provide a system, a method, and an application for carbon recovery system for compact type vessel based on connection between methanol reforming and high-efficiency membrane separation.SOLUTION: Propulsive power is supplied to a vessel by using a methanol aqueous solution as a raw material through steps such as reforming, separation of a reformate product, and hydrogen combustion, hydrogen fuel is manufactured through methanol steam reforming, anxiety about safety of high pressure hydrogen storage in a prior art is eliminated, efficient carbon recovery is carried out by storing separated carbon dioxide by compression and liquefying, heat is supplied for methanol steam reforming and preheating of the fuel by using excess heat of discharged flue gas, and comprehensive use of energy is achieved. Use of hydrogen energy is realized by a vessel without requiring storage and transportation of hydrogen, and a shipping industry contributes to green, low carbon, and sustainable development.SELECTED DRAWING: Figure 1

The invention provides a preparation method of a carbon-coated lithium iron manganese phosphate positive electrode material, and belongs to the technical field of battery positive electrode materials, and the preparation method comprises the following steps: co-precipitating a mixed solution of an iron source, a manganese source and a phosphorus source and a precipitant solution, and drying to obtain a manganese iron phosphate precursor; adding a lithium source, calcining in stages in an inert gas atmosphere, and grinding to obtain lithium manganese iron phosphate powder; the preparation method comprises the following steps: carrying out ball milling on lithium manganese iron phosphate powder and a fluxing agent, dispersing in a carbon source solution, uniformly wrapping a carbon source, drying, carrying out segmented calcination, and carrying out ball milling. The precursor nucleation coating uniformity is improved through segmented speed control reaction of a phosphorus source solution, a manganese source solution and an iron source solution; lithium source mixing and segmented calcination are adopted, and lithium volatilization is reduced; the modified nitrogen-doped porous carbon source is used for coating the lithium iron manganese phosphate powder to generate the lithium iron manganese phosphate positive electrode material, so that the conductivity of the lithium iron manganese phosphate positive electrode material is enhanced.

The invention provides an asphalt-based closed-pore carbon material, a preparation method thereof and a sodium ion battery, the preparation method of the asphalt-based closed-pore carbon material comprises the following steps: S1, pre-oxidizing an asphalt-based carbon source in an oxidizing gas atmosphere at 200-350 DEG C to obtain a pre-oxidized product; s2, carrying out low-temperature carbonization on the pre-oxidized product in an inert atmosphere at 300-800 DEG C to obtain a first precursor; s3, performing gas activation on the first precursor in an activated gas atmosphere to obtain a second precursor; s4, performing chemical activation on the second precursor by adopting a chemical activating agent to obtain a porous carbon material; s5, dipping the porous carbon material in an asphalt solution, and then separating and drying to obtain a blank; and S6, carbonizing the blank under the protection of inert gas to obtain the asphalt-based closed-cell carbon material. The asphalt-based closed-cell carbon material has the advantages of high capacity, high first efficiency and high stable circularity.

The present invention discloses a silicon-carbon negative electrode material with a gradient silicon concentration for lithium-ion batteries and a preparation method thereof. The silicon-carbon negative electrode material comprises graded porous carbon, nano-silicon and a coating layer. The graded porous carbon comprises an inner core porous carbon and an outer layer porous carbon. The pores of the inner core porous carbon are micropores, and the pores of the outer layer porous carbon are mesopores. Nano-silicon is distributed on the graded porous carbon in a gradient manner to form a silicon-carbon composite. The silicon concentration in the mesopores of the outer layer porous carbon is less than the silicon concentration in the micropores of the inner core porous carbon. The coating layer is a carbon layer, which is coated on the surface of the silicon-carbon composite. This gradient distribution of silicon concentration can effectively limit the volume expansion of silicon during battery cycling, reduce side reactions with electrolytes, and avoid the problem of silicon shells being easily generated on the porous carbon surface in a silicon-rich system. In addition, the dense carbon film on the outermost layer of the silicon-carbon negative electrode material further reduces the specific surface area of ​​the material and reduces the formation of SEI film.

The invention relates to the technical field of preparation and application of porous carbon materials, in particular to a preparation method and application of a high-performance biomass-based porous carbon material.The preparation method comprises the following steps that biomass raw materials are smashed, dried and sieved to obtain smashed materials, the obtained smashed materials are carbonized to obtain carbonized materials, and the carbonized materials are dried to obtain the high-performance biomass-based porous carbon material. Mixing the obtained carbonized material and a coating material according to a ratio, coating to obtain a precursor, activating the obtained precursor to obtain an activated product, washing and drying to obtain the biomass-based porous carbon material, coating the biomass material, and then activating to prepare the biomass-based porous carbon material capable of controlling the macropore ratio and the specific surface area. The biomass-based porous carbon material provided by the invention has relatively high micropore volume and specific surface area, can provide more active sites for chemical vapor deposition silicon and improve the deposition efficiency, and can be used as a lithium battery negative electrode material.

The invention discloses metal element-doped nano silicon carbon as well as a preparation method and application thereof, and relates to the field of negative electrode materials. The nano silicon carbon takes porous carbon as a carbon skeleton, and the porous carbon is sequentially attached with nano silicon and coated with a carbon material layer through a chemical vapor deposition method; the porous carbon is prepared by carbonizing resin containing metal nitride after alkali activation and pore forming, and the resin containing the metal nitride is prepared by condensation polymerization of a phenolic compound, an aldehyde compound and the metal nitride in the presence of a catalyst. The porous carbon is doped with the metal nitride in the resin polycondensation process, the conductivity of the nano silicon carbon is effectively improved, the powder resistance is reduced, holes in the surface of the porous carbon provide more expansion space for deposited nano silicon, a carbon material layer formed by subsequent deposition and coating provides a protection effect, the reaction between silicon and an electrolyte can be inhibited, and the service life of the nano silicon carbon is prolonged. A stable SEI film is formed, the cycling stability of the material is improved, the volume expansion rate of a pole piece is inhibited, and the cycling life and the stability of the battery are improved.

To provide a manufacturing method for a carbon nanotube dispersion that can improve the dispersibility of carbon nanotubes.SOLUTION: The manufacturing method disclosed herein includes: a preparation step S1 of preparing a predetermined amount of carbon nanotubes and a solvent; and a mixing step S2 of dividing the predetermined amount of carbon nanotubes into at least three portions, adding each portion into the solvent, and mixing each time the portion is added.SELECTED DRAWING: Figure 1

The invention discloses a method for preparing asphalt-based porous carbon based on an MgO template, and belongs to the technical field of porous carbon, nano MgO and deionized water are mixed and placed in a synthesis kettle, hydrothermal synthesis is performed at 180 DEG C for 2 h, suction filtration and drying are performed, a dried filter cake is crushed and calcined, and porous flaky MgO is obtained; adding the asphalt solution into the MgO suspension, stirring, drying to obtain brown powder, transferring the brown powder into a corundum crucible, putting the corundum crucible into a tubular furnace, calcining to obtain a carbonized C / MgO composite material, and washing the carbonized C / MgO composite material with a diluted hydrochloric acid solution and deionized water to obtain a carbon material sample recorded as AC-75. Pouring the porous carbon material PCs and KOH into a mortar, fully grinding, mixing and calcining to obtain an activated product, pickling and washing the product to be neutral, and drying to obtain the porous carbon material PCs. The raw materials selected by the method are asphalt and flake magnesium oxide which are stable in performance, low in price, large in amount and easy to obtain, a magnesium source can be recycled, environmental protection is achieved, and resources are saved.

The technical scheme of the invention relates to the technical field of data processing, in particular to a method for improving the rapid cooling efficiency of a high-temperature graphite furnace, and the method comprises the steps: carrying out the time axis normalization processing based on a cubic spline interpolation algorithm, combining an adaptive Kalman filter, fusing multi-source data, and generating a time-synchronized three-dimensional temperature field reconstruction matrix; the problem of temperature field reconstruction lag caused by insufficient time sequence alignment precision of multi-modal sensing data is solved. And the reinforcement learning network dynamically optimizes the control parameter weight through the residual feature map, preferentially corrects the deviation of the rotating speed of the induced draft fan and the gas injection angle in a high-error region, and feeds back the deviation to the thermodynamic simulation model for online iterative updating of the specific heat capacity parameters of the material, so that model prediction and dynamic calibration of the actually measured thermal field are realized. Through multi-source data alignment, closed-loop feedback and cooperative control architecture, the timeliness and execution precision of cooling path planning are remarkably improved, and the cooling efficiency and equipment reliability of the high-temperature graphite furnace are optimized.

The invention provides a low-concentration chemical-physical coupling intelligent continuous porous carbon production method and system. The method comprises the following steps: pretreatment: crushing a carbon source to obtain a carbon precursor; carbonizing: heating and carbonizing the carbon precursor in a fluidized bed reactor to obtain a carbonized product; chemical activation: dipping the carbonized product in a chemical activator solution to obtain a chemical activated product, and drying the chemical activated product; physical activation: mixing a reaction gas and an inert gas as an activation gas, placing the chemical activation product in the activation gas, and performing gas activation at a preset temperature to obtain a physical activation product; and post-processing. By coupling chemical activation with physical activation, the concentration of a chemical activation reagent can be reduced, and the wastewater amount and the pollutant concentration after reaction are reduced by reducing the dosage of the reagent, so that the wastewater treatment process is simplified, the treatment agent and energy consumption is reduced, and the treatment cost is reduced.

The invention discloses a porous carbon material, a preparation method thereof and a battery, and belongs to the field of battery materials. The particle size D50 of the porous carbon material is 4-25 [mu] m, the specific surface area measured by a multi-point BET method is 1000-2500m < 2 > / g, and the total pore volume is 0.5-1.2 cm < 3 > / g. The porous carbon material has the particle size, the specific surface area and the total pore volume in the range, has good structural stability, is beneficial to silicon deposition, improves the structural stability of the silicon-carbon negative electrode material after silicon deposition, and improves the capacity and the cycle performance.

The embodiment of the invention provides a method for directly trapping carbon dioxide from air. The method comprises the following steps: capturing carbon dioxide in air through an adsorber; after the carbon dioxide is captured, the interior of the adsorber is vacuumized for the first time; introducing water vapor into the adsorber to increase the pressure in the adsorber and increase the temperature of an adsorbent in the adsorber so as to desorb the carbon dioxide; the adsorber is vacuumized for the second time, and mixed gas formed by water vapor and carbon dioxide is obtained; and carrying out gas-liquid separation on the mixed gas to obtain carbon dioxide. The regeneration energy consumption of the adsorbent is reduced, and the concentration of the carbon dioxide product gas is improved.

The invention provides a preparation system and method of porous electrode carbon. The system mainly comprises a two-section temperature-variable carbonization fluidized bed and an activation fluidized bed. According to the method, small-particle-size polymer particles are softened in the carbonization process and bonded with a large number of heat carrier particles to form composite particles, so that self bonding and excessive growth are avoided, and controllable carbonization is achieved in the two-section temperature-changing carbonization fluidized bed; and introducing the composite particles into an activation fluidized bed, carrying out high-temperature activation, and removing the heat carrier to obtain the porous carbon electrode carbon particles. According to the method, adhesion of polymer particles during carbonization is avoided, the problem of instability of superfine particle fluidization operation is solved, the links of grinding and heating and cooling are reduced, and the method has the advantages of being low in cost and capable of being continuously operated.

The invention relates to the technical field of battery materials, in particular to a graphite negative electrode material and a preparation method and application thereof. The graphite negative electrode material comprises graphite particles, the average length La of the graphite particles in the alpha-axis direction of microcrystals is larger than or equal to 40 nm, the average thickness Lc of the graphite particles in the c-axis direction of the microcrystals is larger than or equal to 25 nm, and the interlayer spacing d002 ranges from 0.336 nm to 0.338 nm, and the number parameter of the microcrystals contained in each single graphite particle is defined as N = D503 / (La2 * Lc); d50 is the median particle size of the graphite particles, the unit is [mu] m, and the numerical value of N is more than 0 and less than or equal to 0.04. The graphite negative electrode material disclosed by the embodiment of the invention comprises the graphite particles with stable microcrystalline structure, large microcrystalline size and large interlayer spacing, so that the expansion and stress distribution uniformity of the negative electrode material in the circulation process is improved, the diffusion of ions in the graphite particles is facilitated, the consumption of active lithium is reduced, and the service life of the negative electrode material is prolonged. And the dynamic and super-long cycle stability of the graphite negative electrode material is improved.

The invention relates to the technical field of wave-absorbing materials. Specifically, the invention relates to a ferrite composite multi-walled carbon nanotube wave-absorbing material and a preparation method thereof. The invention also relates to electronic equipment containing the ferrite composite multi-walled carbon nanotube wave-absorbing material. The ferrite composite multi-walled carbon nanotube wave-absorbing material prepared by the invention comprises a ferrite magnetic material with magnetic loss and a multi-walled carbon nanotube material with electrical loss, and the composite material introduces multiple electromagnetic energy loss modes through unique structural design and component synergy, so that the wave-absorbing performance of the material is enhanced. In addition, the preparation method disclosed by the invention is simple in process, low in requirement on equipment, green and environment-friendly, and free from any toxic and harmful by-products.

The invention relates to a catalytically graphitized silicon-carbon composite material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: providing a porous carbon precursor, sequentially carbonizing, activating and pore-forming, pickling, washing to be neutral, passivating to remove impurities, and then crushing and grading to obtain a porous carbon substrate with the particle size D50 of 5-20 microns; adding a graphitization catalyst into the porous carbon substrate for blending, and carrying out heat treatment at 800-1000 DEG C for 2-6 hours for catalytic modification to obtain modified porous carbon; and putting the obtained modified porous carbon into a chemical vapor deposition reaction furnace, and depositing silicon particles to obtain the catalytically graphitized silicon-carbon composite material. Wherein the graphitization catalyst comprises any one or more of potassium ferrate, iron oxide, nickel oxide, boron, aluminum, titanium, Fe-Si alloy and P-Ni alloy. The graphite catalyst is added to perform catalytic graphitization modification on the porous carbon substrate, so that the energy density, the cycle life and the rate capability of the battery are remarkably improved, and the application requirements of the high-performance battery are met.

The invention belongs to the technical field of solid waste and mineral recycling, and particularly relates to a method for preparing a carbon-silicon material by cooperatively treating solid waste and mineral through microorganisms, which comprises the following steps: carrying out crushing and acid leaching pretreatment on silicon-containing solid waste / mineral to obtain a treated solid reactant; mixing with agricultural and forestry wastes, and naturally fermenting to obtain an organic-solid waste / mineral complex; treating the organic-solid waste / mineral complex by adopting a segmented heating carbon thermal reduction method to obtain a silicon carbide material; or reducing the organic-solid waste / mineral complex by adopting a magnesiothermic reduction method to obtain the silicon powder material. Microbiota generated by composting and silicon-containing solid wastes / minerals are mixed and cultured, organic matters and the silicon-containing solid wastes / minerals are decomposed, the silicon-containing solid wastes / minerals are decomposed and pores are formed by utilizing the decomposition effect of the microbial flora, and meanwhile, organic matters such as agricultural and forestry wastes are decomposed into micromolecular soluble organic matters by utilizing microorganisms; and further dissolving impurity elements in the silicon-containing solid waste / mineral to realize silicon purification.

The present invention discloses a method for preparing a lithium battery high energy density and fast charging graphite negative electrode material, comprising the following steps: mixing, briquetting, and graphitization. The modified graphene is evenly distributed in the graphite phase, and the two have good contact performance, which greatly enhances the conductivity of the graphite material and its coating layer. The amount of conductive agent added can be reduced in the manufacturing process, so that more active substances can be placed in a limited battery space, increasing the energy density of the battery; secondly, catalytic graphitization can increase the capacity of graphite to more than 360 mAh / g, further improving the energy density of the battery; the synergistic effect brought about by graphene modification and catalyst pore formation improves the fast charging performance, and graphene forms a rich conductive network between graphite and granulated coating layers, reducing system impedance and battery polarization, improving conductivity, and enhancing the rate characteristics of the battery. The catalyst volatilization will leave abundant pores, providing a convenient path for the diffusion of lithium ions, and improving the fast charging performance.

The invention provides a functional graded porous carbon microsphere and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing a soft template, a phenolic compound, a cross-linking agent and a basic catalyst, and reacting to obtain a thermosetting phenolic resin microsphere; s2, carrying out pre-carbonization treatment on the thermosetting phenolic resin microspheres to obtain a carbonized material; s3, performing physical activation on the carbonized material to obtain graded porous carbon microspheres; s4, performing heat treatment on the graded porous carbon microspheres to obtain functionalized graded porous carbon microspheres; the preparation method has the characteristics of simple process, environmental protection and economical efficiency, the functionalized porous carbon microspheres prepared by the method are uniform in morphology, and the pore volume, pore diameter and pore structure of the functionalized graded porous carbon microspheres can be accurately regulated and controlled, so that the functionalized graded porous carbon microspheres meeting application requirements are obtained.

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 relates to the technical field of heat-conducting graphite materials, in particular to a POD precursor film, a POD-based graphite film and a preparation method of the POD precursor film, the POD-based graphite film and the preparation method of the POD precursor film. After the reaction is finished, obtaining an antioxidant modified aromatic polyoxadiazole polymer solution; the preparation method comprises the following steps: coating an antioxidant modified aromatic polyoxadiazole polymer solution with a wiped film, then carrying out solidification forming in a multi-stage coagulation bath, and finally neutralizing, washing and drying to obtain a POD precursor film; the coagulating bath is an aqueous solution of sulfuric acid and boron compounds and an aqueous solution of sulfuric acid. And carrying out carbonization treatment and graphitization treatment on the POD precursor film to obtain the POD-based graphite film. According to the preparation method, the boron element is cooperatively introduced into and out of the POD precursor film, so that the oxidation resistance of the graphite film is remarkably improved while the high thermal conductivity is maintained.

The invention discloses a Ca / Mg-based modified biochar material and a preparation method and application thereof, and the preparation method comprises the following steps: pretreatment: drying a biomass material shaddock peel, crushing, sieving, washing and drying, then carrying out acid leaching activation, washing again and drying to obtain high-activity biomass powder for later use; dipping modification: fully mixing the high-activity biomass powder obtained in the pretreatment step with CaO and MgO, adding distilled water, dipping under heating and stirring conditions, then carrying out solid-liquid separation, washing a filter cake for multiple times, freeze-drying, and sieving to obtain an intermediate product; the intermediate product is calcined, naturally cooled, washed and dried, and the Ca / Mg-based modified bimetallic modified charcoal material is obtained and can be applied to adsorption of phosphate in a wastewater solution as an adsorbent. The preparation method is simple, the raw materials are easy to obtain, the cost is low, the material stability is good, the pH adaptability is good, the adsorption effect is good, and the method is suitable for water environments with more complex pollution factors.

The invention discloses a porous carbon material applied to a silicon-carbon negative electrode as well as a preparation method and application of the porous carbon material, and belongs to the technical field of lithium ion batteries. Uniformly mixing asphalt and mixed acid, heating and fully reacting to obtain acid modified asphalt; dispersing the acid modified asphalt in deionized water to prepare an asphalt aqueous solution, sequentially adding melamine and KOH, uniformly dispersing to obtain a mixed solution, and drying to obtain precursor powder; carbonizing the precursor powder under the protection of nitrogen, and then introducing CO2 or water vapor or mixed gas of the CO2 and the water vapor for activation; and washing and drying the activated product to obtain the porous carbon material. The obtained material has excellent conductivity, stability and high silicon loading performance, and can be applied to the field of lithium ion battery negative electrode materials, a silicon-carbon negative electrode prepared by taking the porous carbon material as a carrier is applied to a lithium ion battery, and the technical effects of high capacity density and long circulation can be achieved.

The invention relates to the technical field of lithium battery negative electrode materials, and particularly discloses a resin-based self-activated porous carbon material and a preparation method and application thereof.The preparation method comprises the following steps that a diphenol monomer, a diphenol monomer containing thioether bonds, formaldehyde or polyaldehyde and a catalyst A are subjected to a condensation polymerization reaction, and phenolic resin is obtained; and carbonizing the phenolic resin to obtain the resin-based self-activated porous carbon material. The phenolic resin is synthesized by utilizing the diphenol monomer containing the thioether bond, so that a thioether alkane side chain is introduced into the phenolic resin, and in the carbonization process of the phenolic resin, because the thioether bond is extremely easy to decompose at high temperature to generate gas, a phenolic resin framework can be subjected to pore forming; the prepared resin-based self-activated porous carbon material has high specific surface area and pore volume, controllable design of the internal pore structure of the resin-based porous carbon can be realized by controlling the structure and modification proportion of the thioether alkane side chain, and ideal pore distribution is obtained.

The present invention relates to a method of manufacturing a biochar aggregate comprising the steps of: (i) mixing biochar and at least one binder to form a first composition; (ii) optionally providing a second composition comprising water; (ill) optionally mixing together the first and second compositions to form a pre-mixture; and (iv) agglomerating the first composition or, if present, the pre-mixture to form the biochar aggregate.

The invention discloses a porous carbon material as well as a preparation method and application thereof, and the porous carbon material is prepared by the following steps: by taking a silicon dioxide mesoporous hollow sphere as a hard template through a hard template method, carrying out condensation reaction on phenol and formaldehyde in the hollow part of the silicon dioxide mesoporous hollow sphere to form phenolic resin; and curing, carrying out carbon activation treatment and etching to obtain the spherical phenolic resin porous carbon material. The porous carbon material prepared by the preparation method disclosed by the invention has a relatively high specific surface area and a relatively uniform pore structure, and the cycle performance of a secondary battery can be improved when the porous carbon material disclosed by the invention is used for preparing a negative pole piece and assembling the negative pole piece into the secondary battery.