30 results about "Organic sulfide compound" patented technology

The invention relates to a ZnAl-LDH-based material as well as a preparation method and application thereof in sludge treatment. The ZnAl-LDH-based material is prepared from a divalent metal salt solution and a trivalent metal salt solution through a coprecipitation method, divalent metal comprises Zn and Cu, and trivalent metal is Al; the molar weight ratio of the divalent metal to the trivalent metal is (1-3): 1, and the ratio of the molar weight of Cu to the total molar weight of the divalent metal is (0-0.5): 1. The ZnAl-LDH-based material is used for promoting the organic sulfide in the sludge to be converted into sulfoxide sulfur and sulfone sulfur. Compared with the prior art, a series of ZnAl-LDH-based materials with proper specific surface areas and pore volume structures are prepared, and low-valence organic sulfides in municipal sludge can be promoted to be directionally converted into sulfoxide sulfur and sulfone sulfur; the method has a wide application prospect in the field of improving the high-added-value utilization of organic sulfide-containing wastes such as municipal sludge.

The invention discloses a system and a method for treating odor in a pretreatment stage of a municipal sewage plant. The method comprises the following steps: collecting gas; performing pretreatment; biological desulfurization: the pretreated odor enters a biological desulfurization tower from the bottom, hydrogen sulfide in the odor is oxidized into elemental sulfur or sulfate by acidophilic sulfur-oxidizing bacteria in the process of penetrating through an acidic biological filler layer, and meanwhile, part of ammonia and amine substances are removed through chemical absorption; alkali washing treatment: the gas subjected to biological desulfurization treatment enters an alkali washing tower from the bottom, and in the process of passing through an alkaline filler layer, residual hydrogen sulfide, ammonia gas, organic sulfide and the like are subjected to neutralization reaction with a sodium hydroxide solution so as to be removed; and up-to-standard discharge is realized. According to the invention, high-concentration hydrogen sulfide is efficiently and stably removed, and the impact of the high-concentration hydrogen sulfide on a subsequent treatment unit is avoided; various malodorous substances such as ammonia gas can be synchronously and efficiently removed; the impact load resistance of the system is improved, and the stability of the treatment effect is ensured; the medicament consumption and energy consumption are reduced, and the operation cost is reduced.

The invention provides a low-temperature absorption and adsorption coupling recovery treatment process for VOCs (volatile organic compounds) oil gas in a tank field, and relates to the technical field of VOCs treatment, which comprises the following steps: (1) low-temperature absorption: the VOCs oil gas in the tank field enters an absorption tower and is contacted with an intermediate material absorbent of a factory production device at-5-15 DEG C, and 80-90% of non-methane total hydrocarbon and organic sulfide are removed; (2) adsorption and removal: the absorbed oil gas enters an adsorption unit with three tanks connected in parallel, residual hydrocarbons are deeply removed through an adsorbent, and the hydrocarbon concentration of outlet tail gas is smaller than or equal to 60 mg / m; through the synergistic effect of low-temperature absorption and adsorption, various organic components in the VOCs oil gas in the tank field can be deeply captured, non-methane hydrocarbon can be efficiently removed, refractory components such as organic sulfide can be treated in a targeted manner, available resources in the oil gas are ensured to be fully recycled, and loss of valuable components is avoided.

The present application relates to the technical field of metal organic framework materials, in particular to a modified copper-based metal organic framework material, a preparation method and application thereof, and a sulfide removal method. The modified copper-based metal organic framework material comprises a metal organic framework formed by copper and an organic ligand, and silver doped on the metal organic framework; and the crystal surface of the modified copper-based metal organic framework material has long and narrow honeycomb-shaped pores. + and Ag + The modified copper-based metal organic framework material has suitable pore structures and rich adsorption sites for removing various organic sulfides, and the modified copper-based metal organic framework material has Cu + and Ag + which can adsorb sulfides through π bond action, and has a large adsorption capacity and high adsorption selectivity for sulfides (such as mercaptans, sulfides, thiophenes, etc.) as a desulfurization adsorbent.

This application provides a desulfurization adsorbent comprising an oxide active component and a support, wherein the mass ratio of the oxide active component to the support is 1:(5~1000). The oxide active component is selected from one or more oxides of alkali metals, alkaline earth metals, and Group III subgroup metals. The support is selected from one or more molecular sieves of type A, type X, type Y, activated carbon, and porous metal fluorides. The desulfurization adsorbent described in this application exhibits good adsorption effect, large adsorption capacity, and long breakthrough time for various organic sulfides.

The application provides a sulfate-reducing bacteria culture medium and application thereof, and components of the culture medium include: a carbon source, a nitrogen source, a phosphorus source, calcium chloride, magnesium chloride, an inorganic sulfur source, an organic sulfur compound with reducibility, inorganic trace elements, agar and water; wherein the mass content of the organic sulfur compound with reducibility is 5-30 mg / L, the mass content of the inorganic trace elements is 152-365 mg / L; the organic sulfur compound with reducibility includes lipoic acid and / or thiamine hydrochloride; and the inorganic trace elements include a combination of zinc elements, manganese elements, molybdenum elements and boron elements. The application introduces inorganic trace elements required by biological cell metabolism and rich sulfur electron acceptor species, promotes the growth and metabolism process of sulfate-reducing bacteria, and enables SRB cells to form visible colonies at a faster speed.

The present application relates to a kind of multi-stage pore composite mineral cat litter and its preparation method and recovery method, relate to cat litter technical field, to solve at least one of the problems such as insufficient adsorption amount of existing cat litter, poor catalytic decomposition ability to organic sulfide, environmental pollution, high cost, poor recycling ability etc..The present application realizes the targeted capture and efficient decomposition of multiple odor molecules in pet excrement by constructing gradient pore structure and biological-mineral composite deodorization system, and is suitable for feces management in scenes such as family pet care, stray animal rescue station and zoo.The specific cat litter core of the present application includes hierarchical porous diatomite, and modified sodium-based bentonite, to realize gradient adsorption and enrichment of odor molecules, and to promote the synergistic degradation of NH3, H2S and VOCs using a non-metallic catalytic-biological enzyme combined system.

The application discloses a vanadium ion flow battery with a praseodymium sulfide composite graphite felt electrode and belongs to the technical field of flow battery electrodes. The electrode comprises a graphite felt base body and a surface-loaded praseodymium sulfide composite layer, the composite layer is composed of praseodymium sulfide nanoparticles and carbon nanomaterials, and the particle size of the nanoparticles is 5-50 nm. Preparation is carried out by mixing a praseodymium source and a sulfur source to prepare a precursor, mixing the precursor with a carbon nanomaterial dispersion liquid, performing graphite felt thermal oxidation pretreatment, hydrothermal reaction, washing and drying, and inert atmosphere heat treatment. In the application, inorganic rare earth praseodymium sulfide is used to replace organic sulfide and nitrogen-doped carbon material, Pr 3+ / Pr 4+ is used to realize efficient catalysis, the electrode is resistant to strong acid, stable in a wide temperature range, firmly combined at an interface, and long in cycle life. The electrode can be used in all-vanadium, zinc-bromine, iron-chromium and other flow batteries, is also applicable to the fields of hydrogen production by electrolysis, supercapacitors and electrocatalysis, and is mild in process and easy to scale up.

Disclosed in the present invention are a metal-doped alumina supported basic catalyst, and a preparation method therefor and a use thereof. The catalyst comprises a support and a basic component supported on the support. The support comprises Al2O3, AgxOy and RemOn. By regulating one or more of the following parameters or conditions: the content and / or valence state of AgxOy and RemOn in the support, and the synergistic effect thereof with Al2O3 in the support, the supported basic component, and an optional modified component, the performance of the catalyst is significantly improved, so that the catalyst has better desulfurization efficiency and operation period, and can achieve adsorption removal and refining of different organic and inorganic sulfides under low temperature conditions. Moreover, the catalyst can be regenerated repeatedly, and the preparation method therefor is simple and easy to implement, and is suitable for industrial production.

This invention discloses a porous carbon, a method for preparing porous carbon, an anode sheet, and a lithium-ion battery. The porous carbon and its preparation method for this silicon-carbon anode material utilize inexpensive and widely available high-sulfur pitch as raw material. Crosslinking is achieved by adding ion-exchange resin-type crosslinking agents and organic sulfides, followed by two-step heat treatment, thus realizing the efficient preparation of porous carbon materials. The key to this method lies in: adding a small amount of ion-exchange resin-type crosslinking agent to promote the formation of a stable hard carbon framework structure in the high-sulfur pitch after heat treatment; simultaneously, the precise control of the introduction, type, and amount of organic sulfides effectively regulates the specific surface area, micropore ratio, and pore size distribution of the obtained porous carbon, ultimately producing a porous carbon material with high specific surface area, high micropore ratio, high pore volume, and excellent conductivity. When this porous carbon material is used as a substrate for silicon-carbon anode materials, it can significantly improve the overall performance of the battery, and the preparation process is simple.

The present invention provides a composition for controlling melon Fusarium wilt (MFW), comprising an organic sulfide combined with glucose in certain ratio. The composition of present invention may be applied to melon plants by foliar spray to effectively protect the melon plant from phytopathogenic Fusarium oxysporum f.sp. melonis (FOM) infection, and thus reduce the disease severity and prevent the onset of wilting symptoms in the melon plant.

The application discloses a high-etching-rate selective etching liquid and a preparation method and application thereof, and comprises the following components in parts by mass: 5-10 parts of organic acid, 60-80 parts of inorganic acid, 8-15 parts of oxidizing agent, 1-2 parts of nitrate, 1-2 parts of additive, and 5-15 parts of pure water; the nitrate comprises at least one of sodium nitrate, potassium nitrate, calcium nitrate and ammonium nitrate; and the additive is an organic sulfide substance. The etching liquid is clear and colorless, has high etching rate and high selectivity, is simple to prepare, has good etching uniformity, and can be applied in the field of etching semiconductor display panel manufacturing, and mainly solves the problem of serious shrinkage of upper metal (Al and Mo layers) after etching of a Mo / Al / Ti substrate.

The present application relates to the technical field of adsorbing material, in particular to a desulfurization adsorbent and a preparation method. The TiO2 / clay desulfurization adsorbent obtained by conventional calcination method or single alcohol impregnation method is prone to surface particle accumulation and adsorbent channel blockage, which leads to the decline of the adsorption performance of the desulfurization adsorbent to organic sulfides. In view of the above problems, the present application provides a desulfurization adsorbent, in the process of preparing the desulfurization adsorbent, the clay carrier and the active component are dispersed and dissolved in anhydrous ethanol under a nitrogen atmosphere, and then the two are blended under a nitrogen atmosphere, and after blending, atomization drying is carried out at high temperature. The operation mode, the adsorption effect of the obtained desulfurization adsorbent is good, and the desulfurization adsorbent has good adsorption to various organic sulfides in various organic solvents.

The present application belongs to the technical field of energy storage, and provides a lithium supplementing agent. The lithium supplementing agent comprises a sulfide composite material, the sulfide composite material comprising: a first sulfide, and a second sulfide doped in the first sulfide. The first sulfide comprises lithium sulfide, and the second sulfide is selected from at least one of a metal sulfide other than lithium sulfide, and an organic sulfide. The present application can solve the problems in the existing technology that positive electrode lithium supplementation is prone to gas generation, has a poor lithium replenishment effect, and is not conducive to effectively improving the overall performance of a battery.

The invention discloses an ETBE desulfurizer based on an organic amine-ester composite solvent, and relates to the technical field of separation and purification, the ETBE desulfurizer comprises the following raw materials by weight: 5-20 parts of an organic amine compound, 75-92 parts of an ester solvent, 0.5-8 parts of a scorch retarder, and 1-5 parts of a synergist. The desulfurizing agent disclosed by the invention is composed of an organic amine sulfide complexing agent, an ester solvent, a phosphite scorch retarder and a nano synergist, and organic sulfides such as mercaptan, thioether and the like in ETBE are efficiently complexed through a synergistic effect; middle-high pressure extractive distillation is adopted in the desulfurization process, the boiling point difference of sulfides is remarkably reduced by optimizing the operation pressure and temperature, and the separation efficiency is improved.

This invention belongs to the field of organic synthesis and relates to a method for preparing organosulfur ether compounds using photocatalysis. A disulfide compound 1 and tetrahydrofuran undergo a coupling reaction under the action of a base and a catalyst, and under ultraviolet light irradiation, to obtain organosulfur ether compound 3. This invention provides a novel method for preparing organosulfur compounds. Under light irradiation, a photocatalyst extracts hydrogen atoms from tetrahydrofuran to obtain alkyl radicals, which are then converted into carbocations through redox reactions. Simultaneously, the disulfide ether generates sulfur radicals under light irradiation, which produce sulfide anions under alkaline conditions. The sulfide anions and carbocations then undergo a coupling reaction to obtain sulfide compounds. The method provided by this invention is rationally designed, with mild reaction conditions, is environmentally friendly, and has low cost, achieving a yield of up to 91%. It provides a new method for the synthesis of organosulfur ether compounds and has promising industrial applications.

The invention discloses a method for rapidly preparing aza-aryl thioether compounds through mechanical piezoelectric catalysis C-S coupling reaction. According to the technical scheme, a chlorinated aza-aryl compound and a disulfide compound are used as raw materials, and a C-S coupling reaction is carried out under the conditions of normal temperature, normal pressure and air in a Ni catalysis and trace liquid auxiliary mechanical grinding mode to prepare a series of aza-aryl sulfide coupling products in a green and safe mode. According to the invention, a mechanical force method is adopted to rapidly and simply carry out C-S coupling reaction to prepare an organic sulfide intermediate or carry out thioetherification modification on molecules, the operation and treatment method is simple, the reaction mode is green and safe and is environment-friendly, BaTiO3 / Zn / Ni concerted catalysis is adopted, the reaction condition is mild, and the reaction can be completed in 100 minutes.

The application discloses a kind of based on FeS (112) / β-FeOOH composite material and preparation method and application, preparation method includes steps: iron salt is dissolved with organic sulfide in alcohol solvent, hydrothermal reaction is carried out under inert atmosphere protection, after reaction is finished, by centrifugation, washing is obtained with 112 crystal face as leading hexagonal FeS nanosheet precursor;FeS nanosheet precursor is dispersed in alkaline solution, by adjusting the content of alkaline solution, the pH value of final product is adjusted to 9~12, constant temperature stirring centrifugation, obtain FeS (112) / β-FeOOH heterojunction composite material.The application exposes FeS (112) high activity crystal face by alkali etching, realizes and β-FeOOH lattice matching bonding, forms triple synergy: interface Fe-O-Fe covalent bond inhibits oxidation, and the material oxidation rate is reduced by 80%; β-FeOOH is oriented nucleation in (112) face, and Cr (VI) reduction efficiency is increased by 2.3 times;Heterojunction accelerates electron transfer, constructs efficient reduction channel, and heavy metal removal rate reaches 2.3 times of physical mixing material, and simultaneously inhibits FeS self-oxidation, provides efficient path for heavy metal pollution treatment.

The application discloses a metal organic sulfide (MOSB) positive electrode active material, a preparation method and a lithium-free secondary battery, and belongs to the technical field of new energy secondary batteries. The MOSB material is formed by a plurality of metal ions, an organic ligand and sulfur through a covalent bond to form a stable lattice structure, and the lattice sulfur fixation form can eliminate the polysulfide shuttle effect. The MOSB material can directly participate in an electrochemical reaction as an independent positive electrode active material, the volume expansion rate is less than 5% in a 2.0-3.5V charge-discharge interval, and the intrinsic conductivity is greater than or equal to 10-3 S / cm (four-probe method, 25 DEG C). The lithium-free secondary battery based on the MOSB material is composed of the MOSB positive electrode, a lithium-free negative electrode, a sulfur-tolerant electrolyte and a functional separator. The lithium-free secondary battery does not contain lithium, cobalt and nickel elements in the whole battery system, has a voltage platform of 2.8-3.3V, an energy density of 300-500 Wh.kg-1, a cycle life of greater than or equal to 2000 times at a 1C rate, and no combustion and explosion risk under extreme working conditions. The application is free from the dependence on rare and precious metals, has low cost and excellent cycle stability, and has the potential for engineering production.

The invention relates to a rectification hazardous waste treatment device and process. The rectification hazardous waste treatment process comprises the following steps: S1, feeding and pulping; s2, carrying out a reaction; s3, desulfurization and dechlorination: after the oxidizing agent is dropwise added, continuously carrying out heat preservation reaction for 2-4 hours at the temperature of 60-95 DEG C to ensure that the organic sulfide and the organic chloride completely react to produce sulfur-chlorine inorganic salt; s4, solid-liquid separation: after the desulfurization and dechlorination reaction is finished, cooling the mixed material in the reaction kettle to 60 DEG C or below, and conveying the mixed material to a solid-liquid separation unit for solid-liquid separation; s5, product split-flow treatment, wherein liquid components are directly pumped into a liquid spray gun system of the incinerator to be subjected to spray burning treatment; and solid components are fed into a hazardous waste pit and are uniformly mixed with other solid wastes, and then the mixture is fed into an incinerator through a grab bucket to be grabbed and burnt. According to the method, unstable sulfur and chlorine elements in the rectification residues are efficiently converted into stable inorganic salt to be solidified, and the safety risk of H2S dissipation is fundamentally solved.

Disclosed herein is Method for selective oxidative desulfurization in oil and product thereof, which belongs to the field of energy and chemical engineering. This method operates in a polar phase composed of water and acetonitrile, through the direct oxidation of peroxide organic acids and the activation of the catalyst on the peroxide organic acids to produce active substances, for the selective removal of organic sulfides in the non-polar phase oil solution. In the polar phase, peroxide acetic acid is used as the oxidant, and low-valent transition metals are used as catalysts to activate peroxide acetic acid to produce active substances to achieve the oxidation and removal of organic sulfur in the non-polar phase.

The invention relates to a process for producing a methane-containing product gas from a carbon dioxide-containing input gas and hydrogen, comprising the following steps: - Mixing the carbon dioxide-containing input gas with hydrogen to obtain a feed gas, - Heating the feed gas to a temperature greater than 330°C by means of indirect heat exchange, - Hydrogenating the heated feed gas and chemically converting organic sulfur compounds into inorganic sulfur compounds, - Separating the inorganic sulfur compounds by means of adsorption and / or chemical reaction to obtain a largely desulfurized feed gas, - Mixing the largely desulfurized feed gas with hydrogen and - Methanizing carbon dioxide in the largely desulfurized feed gas with hydrogen to form methane.wherein a reaction heat from a process gas generated during methanation is used, by means of indirect heat exchange through its cooling and water condensation, at least to heat the input gas, so that the methane-containing product gas is available. Furthermore, the invention relates to a device for producing a methane-containing product gas from a carbon dioxide-containing input gas and hydrogen.

The invention relates to the technical field of tire rubber manufacturing, and discloses a low-heat-generation high-temperature-resistant base rubber composition which is prepared by mixing the following raw materials in parts by weight: 65-80 parts of rubber, 30-55 parts of filler A, 3.5-8.5 parts of an activating agent, 3-5 parts of a vulcanizing agent, 1.5-4 parts of an anti-aging agent, 0.5-1.5 parts of tear-resistant resin and 20-45 parts of a nano reinforced composite material, 0.5 to 2 parts of microcrystalline wax, and 0.01 to 0.3 part of scorch retarder CTP; the nano reinforced composite material is prepared by mixing natural rubber, a filler B, organic sulfide and dihydrazide. Through non-homogeneous distribution of the filler, the nano reinforced composite material can absorb a large amount of energy in the stretching process, so that the damage resistance and the high-temperature performance of the rubber material are improved; the dihydrazide enhances the chemical bonding between the nano reinforced composite material and the natural rubber, and reacts with aldehyde groups, carboxyl groups, carbonyl groups and other groups at the tail end of the rubber, so that the activity of the tail end of a free radical is reduced, and the heat generation is reduced.

The invention relates to the technical field of oil and gas field drilling and production wastewater treatment, in particular to a preparation method of an agent for removing organic sulfides in well drilling flow-back fluid, which comprises the following steps: dissolving HEDP-Na4 in heated deionized water, and compensating water temperature and stirring duration based on solution transmittance to obtain first pre-dispersion liquid; controlling the feeding speed, adding HEHMT, and dynamically adjusting feeding and stirring parameters based on the system turbidity monitored in real time to obtain a second pre-dispersion liquid; supplementing HEDP-Na4 or amino acid zinc according to the deviation condition of the pH value and the Zeta potential value to obtain a composite solution; and adjusting the pH value, curing, cooling and filtering to obtain the final medicament. Through multi-parameter real-time monitoring and intelligent compensation regulation and control, efficient and stable preparation of the agent is achieved, and an excellent removal effect on various organic sulfides such as H2S, mercaptan and thioether is achieved.

The invention relates to the technical field of hydrogen sulfide absorption, and particularly discloses a pretreatment column for detecting an organic sulfur sample and a manufacturing method thereof, and the method comprises the following steps: activating 60-mesh silica gel at 150-160 DEG C for 2-3 hours, soaking in a mixed aqueous solution of 5% cadmium sulfate and 2% boric acid for 2-3 hours, and pouring out the solution; drying the treated silica gel in a drying oven; and finally, wetting and uniformly stirring with 75% v / v glycerol aqueous solution, and filling into a polytetrafluoroethylene tube. The pretreatment column disclosed by the invention can be used for carrying out pretreatment on gas containing high hydrogen sulfide, can thoroughly filter out hydrogen sulfide with the concentration of more than 1%, and does not interfere with organic sulfide with the concentration of less than 1 * 10 <-6 >, so that the organic sulfide with the concentration of less than 1 * 10 <-6 > can be detected by a gas chromatograph; the problem that trace organic sulfur in the high hydrogen sulfide gas is difficult to detect is solved.

The present invention provides a lithium replenisher, a method for manufacturing the same, a positive electrode sheet, a secondary battery, and a power consumption device. [Solution] The lithium replenisher comprises a sulfide composite material, the sulfide composite material comprising a first sulfide and a second sulfide doped with the first sulfide, the first sulfide comprising lithium sulfide, and the second sulfide being at least one selected from the group consisting of metal sulfides other than lithium sulfide and organic sulfides. This invention is advantageous in solving the problem in related art that lithium replenishment to the positive electrode tends to generate gas, resulting in low lithium replenishment effectiveness and being disadvantageous for effectively improving the overall performance of the battery.

The invention relates to the technical field of industrial waste gas purification treatment, and discloses an efficient phosphorus chemical tail gas purification process which comprises the following steps: after phosphorus chemical tail gas is pretreated, firstly, organic sulfide is converted into hydrogen sulfide through catalytic hydrolysis; afterwards, in a dielectric barrier discharge reactor filled with a transition metal oxide catalyst, the phosphine and the hydrogen sulfide are efficiently and synergistically oxidized at a low temperature; then, the gas enters a composite absorption tower and is subjected to graded absorption through an upper-section phosphoric acid solution and a lower-section methyldiethanolamine solution; and finally, deep purification is completed through an active coke adsorption tower, and up-to-standard emission of tail gas is ensured. The problem of organic sulfur removal is solved through the catalytic hydrolysis catalyst; low-temperature efficient oxidation is realized by utilizing a low-temperature plasma concerted catalysis technology, and the energy consumption is obviously reduced; and blocking is effectively prevented through graded absorption and tail end adsorption, and long-term stable operation and deep purification of a process system are guaranteed.

The application relates to the technical field of copper foil preparation, in particular to a high-elongation ultra-thin lithium battery copper foil and a preparation method and application thereof, the preparation method comprises the following steps: S1: dissolving copper raw materials, sulfuric acid and deionized water to obtain a copper sulfate solution, then mixing the copper sulfate solution with additives after multi-stage filtration to obtain an electrolyte; S2: heat exchanging the electrolyte through a heat exchanger, then introducing the electrolyte into an electrolytic cell, adjusting the temperature and current density of the electrolyte, and performing electrolytic foil growth; S3: passivating and heat treating the copper foil obtained through the electrolytic foil growth, then performing edge cutting and winding, so that the ultra-thin lithium battery copper foil is obtained; wherein the additive in the step S1 is a mixture of organic sulfides and oxygen-containing polymers. The lithium battery copper foil prepared by the application has good tensile strength and high elongation.

The invention relates to a preparation method of an all-solid-state lithium battery positive electrode material. According to the method, the polyaniline derivative and the organic sulfide are compounded, so that the compatibility of the polyaniline derivative and the organic sulfide is better than that of polyaniline, and the interaction of a molecular level is achieved. Part of nitrogen-substituted polyaniline is used, the alkalinity of the polyaniline is higher than that of polyaniline, a better catalytic effect on organic sulfides is achieved, and the positive electrode material with higher catalytic energy than that of polyaniline can be obtained. In an organic solvent such as N-methyl pyrrolidone, a composite solution of a polyaniline derivative and an organic sulfide is prepared, and conductive carbon black is added. The composite solution is coated or brushed on the surface of a current collector, such as copper, aluminum, platinum or stainless steel, so that the lithium secondary battery positive electrode with high specific energy is obtained. The method is simple to operate, is suitable for the field of high-specific-energy lithium batteries, and has a wide application prospect.

The invention provides a lignite-based carbon negative electrode material, a preparation method thereof and a sodium ion battery. The preparation method of the lignite-based carbon negative electrode material comprises the following steps: obtaining natural lignite raw ore particles; pre-sintering the natural lignite raw ore particles to obtain a lignite sintered body; pickling the coal sintered body by using a fluorine-containing pickling solution to obtain a porous fluorinated lignite carbon skeleton; and treating the porous fluorinated lignite carbon skeleton through a chemical vapor infiltration method so as to grow graphene nanosheets in situ in the porous fluorinated lignite carbon skeleton, thereby obtaining the lignite-based carbon negative electrode material. According to the method, the metal oxide, the organic sulfide and the silicate in the natural lignite raw ore particles are fully utilized as the self-template, so that the energy consumption of presintering is effectively reduced, the carbonization degree is improved, the structural stability of the lignite-based carbon negative electrode material is also improved, and the conductivity, the sodium storage capacity and the cycle life of the sodium ion battery are effectively improved.