131results about "Iron sulfides" patented technology

The present application relates to the field of lithium-ion battery preparation, and provides a method for synthesizing a ferrous sulfide material from a pyrite raw material and an application. A pyrite raw material is crushed and then physically mixed with iron powder and carbon source powder, and is heated in an inert atmosphere to obtain ferrous sulfide powder; the ferrous sulfide powder is mixed with deionized water and then subjected to wet ball milling and high-speed fine grinding to obtain a ferrous sulfide suspension; then, the ferrous sulfide suspension is spray-dried to obtain a precursor of ferrous sulfide microspheres, and the precursor is annealed to obtain a ferrous sulfide material. In the present application, the ferrous sulfide material is applied to a lithium-ion battery to serve as an active material of a negative electrode. By introducing a reducing agent, the present application can solve the problem in conventional methods that pyrite cannot be directly used to synthesize ferrous sulfide due to the presence of an impurity phase. In addition, the present application involves low costs, a simple process and low energy consumption, and is environmentally friendly and easy to realize large-scale production.

The invention discloses a process method for preparing high-spinning nano pyrite through physical field-chemical method coupling regulation and control, which comprises the following steps: dissolving bovine serum albumin in deionized water, adding an iron source, uniformly mixing, adjusting the pH value of the solution to 10.0-11.0, adding a sulfur source, and uniformly mixing, thereby obtaining the high-spinning nano pyrite. Carrying out a coupling regulation reaction of a physical field and a chemical method on the reaction system under the protection of inert gas, and then dialyzing and purifying to prepare the high-spin-state FeS2 nanosheet. The chemical method comprises one or more of a coprecipitation method, a solvothermal method and a hydrothermal method; the physical field comprises one or more of an alternating magnetic field, a static magnetic field and a rotating magnetic field. Through coupling regulation and control of a physical field and a chemical method, accurate conversion of the FeS2 nanosheet from a low spinning state to a high spinning state is realized, chemical doping can be effectively avoided, natural biological suitability of FeS2 is reserved, and the method has a good clinical conversion application prospect.

The invention provides a pretreated biomass charcoal loaded vulcanized nano zero-valent iron material as well as a preparation method and application thereof, and relates to the technical field of environmental functional materials. The preparation method comprises the following steps: firstly, dipping pretreated biomass in phosphoric acid, pyrolyzing, and then ball-milling and crushing to micro-nano scale; then, FeCl3 is used as a precursor, NaBH4 and Na2S2O4 are used as a reducing-vulcanizing agent, and S-nZVI is loaded through a one-step method. The composite modified material has high efficiency in heavy metal pollution in a water body, can simultaneously remove various pollutants, has a wide application prospect, and provides a new efficient material choice for the field of environmental restoration.

The utility model discloses a ferrous sulfide passivation device which comprises a passivation box and a movable door hinged to one side of the passivation box. The spraying mechanism is arranged in the passivation box and comprises a sieve plate fixedly mounted at the bottom of an inner cavity of the passivation box, and a placement frame is arranged at the top of the sieve plate; according to the scheme, the spraying assembly and the linkage assembly are matched with each other, the spraying area of the vulcanizing machine can be increased during passivation of ferrous sulfide, meanwhile, the fixing ring can be driven to rotate through meshing connection of an asymmetric gear and a linkage gear in the spraying process, ferrous sulfide moves during passivation, and the passivation efficiency of ferrous sulfide is improved. Therefore, the passivation uniformity of ferrous sulfide is further improved while the spraying area is increased.

This invention belongs to the field of lithium-ion battery technology, specifically relating to a composite cathode material for lithium-ion batteries and its preparation method. The composite cathode material consists of three parts: a cathode matrix material, a lithium replenishment material, and a catalyst material. The preparation method is as follows: (1) preparing a composite material of the cathode matrix material and the lithium replenishment material in situ; (2) dispersing the catalyst material on the surface of the composite material and forming a stable interface layer between the catalyst material and the lithium replenishment material. Through the method of this invention: the lithium replenishment material has both surface modification of the cathode matrix material and lithium replenishment of the negative electrode, simultaneously improving the battery's initial efficiency and cycle stability; introducing the catalyst material onto the surface of the lithium replenishment material in situ fixes the free O generated by the Li release from the lithium replenishment material, alleviating the battery swelling phenomenon and further improving the battery's cycle stability and safety; moreover, the preparation process is simple, the raw materials are cheap and readily available, the production cost is low, and it is easy to promote industrial production.

The application discloses a pyrite-based composite positive electrode material, a preparation method thereof and application of the pyrite-based composite positive electrode material in a full-solid-state battery, and relates to the technical field of battery materials. The preparation method of the pyrite-based composite positive electrode material comprises the following steps: (1) performing shock ball milling treatment on pyrite block crystals to obtain iron sulfide powder; (2) mixing lithium sulfide and lithium iodide, and then performing high-energy ball milling treatment to obtain a lithium iodine sulfur amorphous mixture; and (3) mixing the iron sulfide powder and the lithium iodine sulfur amorphous mixture, and then performing high-energy ball milling treatment to obtain the pyrite-based composite positive electrode material. The pyrite-based composite positive electrode material is combined with a solid electrolyte membrane and a lithium indium negative electrode, and a pyrite composite positive electrode sulfide full-solid-state battery with high capacity and low attenuation can be prepared, and the pyrite composite positive electrode sulfide full-solid-state battery exhibits high specific capacity and long cycle performance.

The invention discloses a method for degrading agricultural non-point source organic pollutants by utilizing a ferroferric sulfide-peracetic acid system and application of the method. The ferroferric sulfide adopted by the invention shows the efficient redox cycle characteristic of Fe (Fe < 2 + > / Fe < 3 + >) and S (S < 2-> / Sn < 2->), the cycle performance of the material is efficient, and the defects that the degradation of pollutants is not ideal and the pollutants are difficult to recover when the existing material is used for activating persulfate or peracetic acid in a water treatment technology are overcome; in addition, in the degradation process, the system has good anti-interference capability on common ions and organic matters in the environment. Peroxyacetic acid is used for adjusting the pH value, no extra acid or alkali needs to be added, and the application range is wide. The reaction can be carried out at normal temperature and normal pressure, and the method has a good application prospect in the field of water pesticide pollutant remediation.

This invention discloses a cubic spinel-structured sulfide composite gas-sensitive material, a gas sensor, its preparation method, and its application, belonging to the field of gas sensor technology. The preparation method of this composite gas-sensitive material involves using FeCl2, CdCl2, and InCl3 as metal sources, and thiourea as a sulfur source, placing them together in a solvent of water, adding citric acid or sodium citrate as a dispersant, and obtaining a precursor material through a hydrothermal reaction. After calcination and annealing, a cubic spinel-structured FeIn2S4 / CdIn2S4 heterojunction material powder is obtained. The two gold electrodes and the ceramic tube of the gas sensor are coated with the cubic spinel-structured sulfide composite gas-sensitive material. The gas sensor based on this invention, made from a cubic spinel-structured sulfide composite gas-sensitive material, has a simple manufacturing process, low production cost, and is suitable for industrial mass production. It has broad application prospects in the field of acetone detection in trace hazardous situations.

The invention relates to the technical field of electrochemical uranium extraction, in particular to a uranium extraction method based on electrochemical mediation FeS active site regeneration. According to the specific technical scheme, under the anaerobic condition, a nano FeS modified working electrode is prepared on a carbon-based material through in-situ deposition, and a corresponding electrochemical uranium extraction system is constructed. The system operates at room temperature and low energy consumption, and U (VI) is efficiently reduced into low-toxicity and indissolvable tetravalent uranium and enriched on the surface of an electrode through efficient adsorption and coordination effects of FeS active sites on uranyl ions and driving of cathode potential. According to the uranium extraction method of the nano FeS in-situ modified carbon cloth electrode provided by the invention, consumed FeS active sites are regenerated in situ by utilizing an electrochemical method, and the high activity and long-term stability of the electrode are maintained. The method shows high extraction capacity, high selectivity and excellent cycle performance for uranium in uranium mine wastewater and seawater, and provides a reliable way for efficient and sustainable uranium resource recovery.

The invention provides a method for preparing a sulfide heterogeneous foam carrier from foam metal and application, and the method comprises the following steps: placing a sulfur source in a porcelain boat, placing the foam metal in another porcelain boat, placing the two porcelain boats in a quartz tube, and placing the quartz tube in a tubular furnace, placing a porcelain boat filled with a sulfur source at the upstream, close to a gas inlet, of a tubular furnace, and placing a porcelain boat filled with foam metal at the center of the tubular furnace; sealing the tubular furnace, continuously introducing inert gas to keep inert atmosphere, and then heating the tubular furnace to 400-800 DEG C for reaction; and after the reaction is completed, continuously introducing inert gas, reducing the temperature of the tubular furnace to room temperature, and taking out a product, namely the sulfide heterogeneous foam carrier.

The present application belongs to the field of metallurgy, and relates to a method for producing antimony white by directly oxidizing crude antimony, comprising the following steps: S1, mixing crude antimony with crude antimony alloy, and reacting under an oxygen-containing atmosphere, to obtain oxidized slag and a melt after the reaction is completed; S2, adjusting the temperature of the melt, and then introducing compressed air to react, to produce antimony trioxide-containing flue gas, and to obtain antimony oxide slag after the reaction is completed. The present application makes full use of impurities such as sodium sulfide, sodium hydroxide and sodium thiosulfate contained in crude antimony, and innovatively uses these components for arsenic removal reaction, which not only avoids the cumbersome steps of adding various auxiliary materials in the traditional process, but also enables the original sodium sulfide, sodium hydroxide and sodium thiosulfate in the crude antimony to fully play a synergistic role, showing excellent performance in arsenic removal effect, thus simplifying the process flow, significantly reducing the production cost, and realizing the dual improvement of economic benefit and process efficiency.

A method for treating polluted acidic wastewater from smelting with an activated pyrite concentrate includes: drying and grinding a pyrite concentrate, and washing twice to produce a washed pyrite concentrate powder; mixing the washed pyrite concentrate powder with a Na2S powder to produce a mixed powder, and adding purified water; allowing a reaction for 3.5 h to 4.5 h; filtering to produce an activated pyrite concentrate; subjecting the activated pyrite concentrate to aeration and standing, drying, and grinding to produce an activated pyrite concentrate powder; adding a lime slurry to the wastewater to adjust a pH; adding the activated pyrite concentrate powder, and allowing an ultrasonic treatment, continuous stirring is conducted; allowing a settlement to produce a first supernatant; adding a lime slurry to the first supernatant to adjust a pH; further allowing a settlement to produce a second supernatant; and separating the second supernatant.

The present invention belongs to the field of the development of new adsorbents and comprehensive utilization of resources, and discloses a preparation method of an inorganic tin sulfide adsorbent and its application in cesium extraction. The adsorbent is synthesized by a hydrothermal method and has a lamellar structure. It has excellent ion exchange performance for alkali metal cesium ions in an aqueous solution and exhibits excellent adsorption selectivity. The adsorbed material can be regenerated, thus realizing the recycling of the adsorption material. The preparation process of the adsorption material provided by the present invention is simple and low in cost. Therefore, the adsorption material prepared by the present invention can be used for the extraction of cesium in geothermal water, salt lake brine, and underground brine, and can also be applied to the separation and extraction of cesium in solid cesium ore or associated ore leaching solutions.

The present invention relates to the technical field of electrocatalytic materials, and in particular to an OER electrocatalyst and a preparation method thereof, the preparation method comprising: adding an iron salt, a nickel salt, a nitrogen source and a foam nickel substrate to water to obtain a mixed solution; reacting the mixed solution under preset temperature conditions to obtain a precursor; and sulfurizing the precursor to obtain the OER electrocatalyst. In the present invention, the precursor with a nanoflower morphology formed in the hydrothermal process still retains the morphological characteristics of the nanoflowers in the high-temperature sulfurization process, which allows enough active sites to be fully exposed. The heterogeneous interface (Fe3S4 / Ni(OH)2) in the electrocatalyst has a synergistic effect, which improves the charge distribution on the catalyst surface, accelerates the electron transfer rate, and effectively improves the OER catalytic activity. In the stability test under high current density, the Fe3S4 / Ni(OH)2 / NF catalyst also showed excellent long-term stability. At a current density of 100mA cm ‑2 It can work stably for 100 hours.

The application relates to the technical field of sodium ion battery negative electrode materials, and discloses a preparation method and application of a copper-iron sulfide / nitrogen-doped porous carbon composite material, which comprises the following steps: (1) mixing copper salt, potassium ferricyanide, a nitrogen source and polyethylene glycol, and obtaining a copper-iron Prussian blue precursor after ball milling; (2) pyrolyzing the copper-iron Prussian blue precursor under an inert atmosphere, washing and removing impurities, and drying to obtain an intermediate product; and (3) heat-treating the intermediate product and a sulfur source under an inert atmosphere to obtain a copper-iron sulfide / nitrogen-doped porous carbon composite material. Through the synergistic effect of the double-metal sulfide and the nitrogen-doped porous carbon composite, sodium ions with a larger ion radius can be more easily embedded and de-embedded in the interlayer spacing, meanwhile, abundant active sites are provided to enhance ion storage, so that the sodium ion battery has outstanding rate performance and stable cycle performance.

The invention provides a composite negative electrode material for an iron-nickel secondary battery as well as a preparation method and application of the composite negative electrode material. The composite negative electrode material for the iron-nickel secondary battery is prepared by adopting a method comprising the following steps: mixing iron salt, a sulfur source, polyvinylpyrrolidone and a solvent, and carrying out solvothermal reaction to obtain a precursor; and pyrolyzing the precursor in protective gas to obtain the catalyst. The method is simple and convenient in preparation process and controllable in reaction condition, and the obtained material has high specific capacity, excellent cycle life and rate capability and has a good industrial application prospect. The invention also provides the composite negative electrode material prepared by the method and application thereof.

The application relates to an artificial wetland filler and a preparation method and application thereof, and relates to the field of environmental treatment. The filler is composed of pyrite quantum dots PQD and carbon dots CDs. After the carbon dots CDs are made into powder, the powder is dissolved in distilled water, continuous magnetic stirring and boiling to 100 DEG C are carried out, immediately, pyrite quantum dots PQD with the same mass as the carbon dots CDs are added, stirring is carried out in dark conditions, after centrifugation, washing is carried out with distilled water, vacuum freeze-drying is carried out, and the PQD-CDs composite material is obtained. The filler can significantly enhance the pollutant removal efficiency, and has important significance for the treatment of farmland wastewater. The innovative method contributes to the improvement of the efficiency and sustainable development in the field of water treatment.

The embodiment of the invention relates to a transition metal sulfide graphite composite material as well as a preparation method and application thereof. The method comprises the following steps: dissolving a transition metal compound in a solvent, and mixing and stirring with a graphite raw material to obtain a mixture containing transition metal ions; performing heat treatment on the mixture at 700-1600 DEG C for 10-48 hours, so that a material with a cementite structure is formed in the heat treatment process of the mixture, transition metal ions are gradually diffused into the material, an onion carbon layer is formed on the outer layer of the material, and a primary carbonized material is obtained after crushing and grading; the primary carbonized material is subjected to heat preservation for 1-2 hours at the temperature of 600-2500 DEG C in a protective atmosphere environment, so that transition metal elements in the primary carbonized material escape through pore parts of the material, and a precursor material is obtained; and mixing the precursor material with sulfur powder, heating, and introducing a mixed gas containing a carbon source gas for chemical vapor deposition coating to obtain the transition metal sulfide graphite composite material.

The invention provides a three-dimensional self-supporting heterogeneous heterojunction electrocatalyst and a preparation method and application thereof.The three-dimensional self-supporting heterogeneous heterojunction electrocatalyst comprises a conductive substrate and a CoMoS3. 13 / FeS2 / Co3S4 heterojunction nanosheet growing on the conductive substrate, and the CoMoS3. 13 / FeS2 / Co3S4 heterojunction nanosheet is composed of three components including CoMoS3. 13, FeS2 and Co3S4. The three-dimensional self-supporting heterogeneous heterojunction electrocatalyst provided by the invention has relatively good water electrolysis catalytic activity and cycling stability under an alkaline condition.

The present invention relates to the field of biomedical technology, and particularly to a preparation method and application of an anti-hepatic fibrosis nano-drug. Ammonium ferrous sulfate, trisodium citrate and ethylene glycol are mixed to obtain solution A; solution A and a polyethyleneimine solution are mixed to obtain solution B; solution B and a thioacetamide solution are mixed to obtain solution C; solution C and triethanolamine are mixed and then reacted to obtain iron sulfide nanosheets; the iron sulfide nanosheets, SH-PEG-NH2 and absolute ethanol are mixed to obtain FP; FP, artemisinin and absolute ethanol are mixed to obtain the anti-hepatic fibrosis nano-drug. The synthesis method of FPA is simple and highly operable; the product is stable and has repeatability; FPA has good biocompatibility and biodegradability. After entering the hepatic fibrosis microenvironment, it responds to degrade highly expressed hydrogen peroxide, promotes the change of the hepatic fibrosis cell microenvironment, and then induces apoptosis.

The invention relates to the technical field of electrode materials, and particularly discloses a three-dimensional porous carbon composite electrode material and a preparation method thereof. The three-dimensional porous carbon composite electrode material provided by the invention comprises a multi-component metal sulfide core body and an N and S co-doped three-dimensional porous carbon layer coating the surface of the core body, wherein the multi-component metal sulfide core body comprises Mn, Ni, S and C. According to the invention, multi-component metal sulfide is adopted to synergistically inhibit diffusion, form nanoscale pores and relieve volume expansion, and meanwhile, by introducing the N and S co-doped three-dimensional porous carbon layer, more Na < + > adsorption active sites are provided, and the conductivity is enhanced.

The application belongs to the technical field of preparation of lithium-sulfur battery electrode materials, and particularly relates to a Fe7S8-CNTs / S composite lithium-sulfur battery positive electrode material and a preparation method thereof.The positive electrode material has an interlayer space structure, Fe7S8 nanoparticles are attached to hollow carbon nanotubes CNTs in the positive electrode material, a nanostructured Fe7S8-CNTs is obtained, and S is uniformly loaded on the Fe7S8-CNTs.CNTs can limit the shuttling of LiPSs through a physical constraint effect, on the one hand, Fe7S8 effectively inhibits the "shuttling effect" through chemical adsorption of LiPSs, and on the other hand, the conversion activation energy of LiPSs is reduced to Li2S2 and Li2S.Due to the special structure of the electrode and the perfect combination of CNTs and Fe7S8, the Fe7S8-CNTs / S positive electrode has excellent electrochemical performance.In summary, the material is a new type of host material with adsorption and high conductivity characteristics that can be applied to lithium-sulfur battery positive electrodes.

The invention relates to the technical field of land pollution treatment, solves the problem that in the prior art, when a large-area medium polluted by hexavalent chromium is treated, the addition amount of ferrous sulfide is prone to being inaccurate, and consequently the remediation effect is not ideal, and provides ferrous sulfide particles with shells and a preparation method and application of the ferrous sulfide particles. The prepared ferrous sulfide particles with the shells can keep efficient removal of chromium within the pH value range of 5-9, the problem that the adsorption behavior of a traditional model in a low-chromium-concentration area is difficult to predict is effectively solved by means of a correction adsorption model with higher fitting precision, and therefore the actual demand quantity of target repairing liquid can be accurately predicted, and the application prospect is wide. The target repairing liquid can be injected more accurately, and excessive or insufficient injection is avoided. After hexavalent chromium is reduced into trivalent chromium by ferrous sulfide, the trivalent chromium and carboxymethyl cellulose can form a stable chelate, and zero-valent sulfur can also form a compact passivation layer on the surface of a polluted medium, so that the trivalent chromium is prevented from being reoxidized, and long-term stable repair of hexavalent chromium is realized.

The present invention relates to the technical field of treatment of smelting wastewater. Disclosed is a method for treating smelting waste acid wastewater with activated sulfur concentrate. The method comprises drying and grinding sulfur concentrate and washing the sulfur concentrate twice with pure water and twice with anhydrous ethanol; uniformly mixing sulfur concentrate powder with Na2S powder at a mass ratio of 10:1-2, adding pure water at the mass-to-volume ratio of the mixed powder to the pure water being 400-500 g:1000 mL, and reacting the mixture for 3.5-4.5 h at 105-115°C, 0.3-0.5 MPa and 160-200 r / min; filtering the resulting activated sulfur concentrate and performing ventilation standing, drying, and grinding; adding lime milk to the wastewater and adjusting the pH value to 2.0-4.0; adding at a ratio of the activated sulfur concentrate powder to the wastewater of 12.0-20.0 g:1.0 L, carrying out ultrasonic treatment at 25-28 kHz, while maintaining the water temperature at 28-32°C, stirring and reacting for 5-6 h at a rotation speed of 140-180 r / min, and maintaining the dissolved oxygen content at 10.0-15.0 mg / L; and after 30-60 minutes of precipitation, adding lime milk to a primary supernatant, adjusting the pH value to 8.0-9.0, continuing to precipitate for 30-60 minutes, and then separating the supernatant obtained again. The method has high water quality applicability, and involves short process flow and low operation cost, the pollutant content of the treated water reaches national standard requirements, and a sediment has good dewatering performance and can be recycled.

The invention belongs to the technical field of batteries, and particularly relates to a preparation method and application of an iron-based sulfide composite material. MIL-101 (Fe) and thiourea react under the hydrothermal condition and then react with graphene oxide, the iron-based sulfide composite material is obtained, and the iron-based sulfide composite material shows excellent electrochemical performance and serves as a battery negative electrode material. According to the preparation method, MIL-101 (Fe) is used as a precursor, the MIL-101 (Fe) is used as an ideal template, the MIL-101 (Fe) and low-toxicity thiourea are subjected to low-temperature hydro-thermal synthesis to form the double-phase metal sulfide with uniform morphology, the energy consumption is low, the process is mild and controllable, the high porosity and the regular morphology of the MIL-101 precursor are inherited and reserved to the greatest extent, and the preparation method has the advantages of simple process, high yield and high yield. And meanwhile, collaborative construction of heterojunction and pores is realized.

The invention belongs to the technical field of electro-catalytic materials, and relates to a preparation method and application of a CoFe-PBA chalcogenized carbon cloth composite material, in particular to a CoFe-PBA loaded carbon cloth Prussian blue (CoFe-PBA) precursor based on electrochemical activation. The invention discloses a method for preparing a cobalt sulfide / iron sulfide heterostructure material through sulfuration treatment and integrated application of the cobalt sulfide / iron sulfide heterostructure material in the field of hydrogen production through water electrolysis. Carbon cloth is activated through electrochemical pre-oxidation to enhance the surface activity, and after CoFe-PBA grows in situ, a uniformly dispersed CoS2 / FeS2 heterostructure is generated through calcination in a sulfur powder atmosphere. The material has high conductivity, abundant active sites and strong interface coupling effect, and shows excellent hydrogen evolution and oxygen evolution performance.

Provided herein are compositions, devices, electrochemical systems, and methods relating to lithium-rich iron sulfide lithium-ion battery cathodes. In one embodiment, a composition may be characterized by formula FX1: Liw-δAlxFezS2. In some embodiments, w may be greater than or equal to 2 and less than or equal to 2.5. In some embodiments, x may be greater than 0 and less than or equal to 0.5. In some embodiments, z may be greater than 0 and less than or equal to 1. In some embodiments, δ may be greater than or equal to 0 and less than w. In some embodiments, the composition may have a net charge of 0.

The invention discloses a pyrite-based composite positive electrode material, a preparation method thereof and an application of the pyrite-based composite positive electrode material in an all-solid-state battery, the preparation method of the pyrite-based composite positive electrode material comprises the following steps: (1) carrying out oscillation ball milling treatment on pyrite square crystals to obtain iron sulfide fine powder; (2) mixing lithium sulfide and lithium iodide, and then carrying out high-energy ball milling treatment to obtain a lithium-iodine-sulfur amorphous mixture; and (3) mixing the iron sulfide fine powder and the lithium-iodine-sulfur amorphous mixture, and then carrying out high-energy ball milling treatment to obtain the pyrite-based composite positive electrode material. The pyrite-based composite positive electrode material is combined with a solid electrolyte membrane and a lithium-indium negative electrode, so that a high-capacity and low-attenuation pyrite composite positive electrode sulfide all-solid-state battery can be prepared, and high specific capacity and long circulation performance are shown.

The present application belongs to the field of mineral processing and battery electrode, and relates to a preparation method of high-performance cobalt-doped iron sulfide battery material. The present application takes cobalt-containing pyrite concentrate as raw material, first adopts regrinding-flotation method to process it, then carries out crushing and a large amount of organic matter coating, then carries out spray drying to obtain macromolecule mixed and wrapped cobalt-containing pyrite particles, and finally roasts the particles in inert atmosphere at high temperature to obtain cobalt-containing pyrite-based high-performance battery material. With the aid of natural cobalt doping characteristics, the present application realizes short-process preparation of cobalt-doped iron-based sulfide electrode material, which has the characteristics of high specific capacity, high rate, no volume effect, good stability and long cycle life, and is suitable for application in lithium ion batteries and lithium ion supercapacitors or sodium ion batteries and sodium ion supercapacitors as negative electrode lithium or sodium storage material. The preparation method of the present application is simple and efficient, has few processes, high yield and is suitable for large-scale industrial production.