33results about How to "Reduce chalking" patented technology

The invention provides a silicon-carbon negative electrode material, a preparation method thereof and a lithium ion battery. The silicon-carbon negative electrode material comprises a porous carbon substrate, nano silicon deposited on the surface and in pores of the porous carbon substrate, and a conductive polymer layer coated on the surface of the nano silicon, the porous carbon matrix is formed by taking zinc gluconate as a carbon source through high-temperature pyrolysis and carbonization. According to the silicon-carbon negative electrode material, the preparation method thereof and the lithium ion battery provided by the invention, the silicon-carbon negative electrode material has high specific surface area, excellent conductivity and stable cycle performance, and shows excellent cycle stability and relatively high reversible capacity in the charge-discharge process when being used for the lithium ion battery; the energy density and the cycle life of the lithium ion battery are effectively improved, a new technical approach is provided for preparation of the silicon negative electrode material of the lithium ion battery, and the preparation method has a wide application prospect.

The invention provides a quick-charge and quick-discharge type lithium battery and a preparation method thereof, and belongs to the technical field of lithium battery preparation. The preparation process comprises the following steps: preparing a fluorinated carbon nanotube based on biomass carbon; preparing a positive electrode plate; preparing the dendritic mesoporous silicon dioxide nano particles; preparing a cerium oxide-loaded two-dimensional hierarchical porous composite material; preparing a negative electrode plate; and assembling the lithium battery. According to the preparation method, the eutectic and the carbon fluoride nanotubes are added in the preparation of the positive electrode plate, and the cerium oxide-loaded two-dimensional hierarchical porous composite material and the carbon fluoride nanotubes are added in the preparation of the negative electrode plate, so that the prepared positive electrode plate and the prepared negative electrode plate have relatively high conductivity; and moreover, the ion transmission efficiency is improved, the rapid ion transmission is beneficial to reducing the polarization phenomenon of the battery, improving the charging and discharging rate and the power performance of the battery, enhancing the structural stability of the electrode, improving the performance and the safety of the battery, and being more beneficial to rapid charging and rapid discharging.

The invention discloses a pesticide slow-release granule suitable for simultaneous sowing of pesticide and plant seeds. The pesticide sustained-release granule has double coating layers, the first coating layer takes a pesticide effective component A as a core and a nano calcium carbonate carrier material as a shell, and nano calcium carbonate is used for carrying out first-layer coating on a bactericide effective component through a physical adsorption method; the second coating layer is formed by mixing the first coating layer and the pesticide active ingredient B as a core and taking materials such as attapulgite as a shell. The sustained-release granule has good sustained-release performance, can stably release effective components in a long time, prolongs the pesticide effect period, reduces frequent pesticide application operation, and further improves the pesticide utilization rate.

The invention relates to the technical field of oxygen preparation devices, and particularly discloses a molecular sieve pulverization prevention oxygen preparation host adsorption tower which comprises an adsorption tower body, an upper cover is fixedly mounted at the top of the adsorption tower body, a bottom cover is fixedly mounted at the bottom of the adsorption tower body, and supporting frames are fixedly mounted on the outer sides of the adsorption tower body and the bottom cover. An air inlet pipe is fixedly connected in the bottom cover, an exhaust assembly is arranged in the upper cover, and a screening assembly is arranged in the adsorption tower body; the partial pressure plate is mounted in the bottom cover through the reset mechanism, so that when air enters the partial pressure plate, the partial pressure plate is firstly pushed to move, air inlet impact is reduced, then the air is shunted through the filter seats, impurities and moisture in the air are filtered out, the oxygen quality is prevented from being influenced, and air shunting can ensure that the air uniformly acts on the molecular sieve main body; and air can uniformly pass through the molecular sieve main body to realize gas separation, so that the pulverization degree of the molecular sieve main body is reduced, and the oxygen production quality is improved.

The invention belongs to the technical field of solid-state batteries, and discloses a preparation method of an all-solid-state battery. The preparation method comprises the following steps: preparation of a positive pole piece: preparing the positive pole piece from SIBS and a positive active material; preparing a negative pole piece: preparing the negative pole piece by using SIBS and a negative active material; preparing an electrolyte membrane: preparing the electrolyte membrane from the SIBS and an electrolyte; and pressing and packaging the positive pole piece, the electrolyte membrane and the negative pole piece to obtain the all-solid-state battery, and in the electrolyte membrane, the mass percent of the SIBS is 3-10%. In the preparation process of the all-solid-state battery, specific SIBS with good elasticity is selected as a binder, and the content of the SIBS in an electrolyte membrane is not less than 3%, so that volume expansion of an electrode in the charging and discharging process can be effectively relieved, pulverization and falling of an electrode material are reduced, and the stability of an electrode structure is maintained, thereby remarkably improving the cycling stability of the all-solid-state battery.

The invention relates to the technical field of sintering, and discloses an in-furnace high-permeability efficient sintering process which comprises the following steps: step 1, selecting raw ore; step 2, proportioning raw ore; 3, high-quality lime application; step 4, steam preheating; step 5, sintering process control; and 6, sintering is completed. In the first step, the proportion of small-particle-size raw ore in the proportion is increased to 20%, the compactness and uniformity of a sintered block are improved, combination is easier during sintering, and therefore the strength and stability of a final product are improved, in the second step, the average particle size is controlled to be 5 mm, the particle size smaller than 1 mm is smaller than 5%, and the particle size larger than 3 mm is larger than 65%. The method ensures good fluidity and effective reaction of the material in the sintering process, the moisture content is controlled to 6.8-8%, pulverization is reduced, the strength and stability of the sintered ore are improved, and the beneficial effects of improving the drum strength and metallurgical performance of the sintered ore and ensuring long-period stable and smooth operation of the blast furnace condition are achieved.

The invention belongs to the field of lithium-sulfur secondary batteries, and relates to a lithium-sulfur battery positive electrode and a preparation method thereof.The positive electrode active layer of the positive electrode comprises an active sulfur-graphene composite material, a conductive agent and polyvinylidene fluoride; the active sulfur is sublimed sulfur particles of which the surfaces are loaded with cerium single atoms. The cerium monatomic catalyst can form strong chemical bonding with polysulfide, and shuttling of the polysulfide can be effectively inhibited in cooperation with a physical barrier of graphene; the cerium has relatively high selective adsorption on long-chain polysulfide, the redox reaction energy barrier of the polysulfide is reduced, the utilization rate of sulfur is improved, the loss of active substances is reduced, and the coulombic efficiency, the cycle stability and the charge-discharge efficiency of the battery are improved; the conductivity of sulfur can be enhanced, rapid transmission of electrons in the whole electrode is promoted, and the rate capability of the battery is improved; meanwhile, cerium single atoms can form a stable coordination structure on the surface of sulfur, so that the volume expansion of sulfur in the charge-discharge process is limited, and the cycle life of the battery is prolonged.

The invention discloses a preparation method of a solid electrolyte composite coating modified positive electrode material. The preparation method specifically comprises the following steps: S1, preparing a positive electrode material composite coating layer; s2, optimizing the characteristics of the composite coating layer; s3, assembling the solid-state battery; the invention relates to the technical field of solid-state batteries. According to the preparation method of the solid-state electrolyte composite coating modified positive electrode material and the solid-state battery, the interface resistance between the positive electrode and the solid-state electrolyte is effectively reduced through the oxide-polymer composite coating layer, the rapid transmission of lithium ions is promoted, and the charge-discharge efficiency and the energy density of the battery are improved; the flexibility of the polymer and the high mechanical strength of the oxide are combined, the structural stability of the battery in the charging and discharging process is improved, the pulverization and peeling phenomena of the positive electrode material are reduced, the cycle life of the solid-state battery is remarkably prolonged by optimizing the composition and structure of the coating layer, the capacity fading is reduced, and the service life of the solid-state battery is prolonged. And the cycling stability and reliability of the battery are improved.

The utility model relates to a quantitative filling tool suitable for a gold-series mercury-free catalyst, and belongs to the technical field of catalyst filling. Comprising a rack and a plurality of filling units, and the filling units penetrate through the rack to be connected; the filling unit comprises a volume-adjustable cup, a drawing plugging element and an independent discharging guide pipe. The outer wall of the volume-adjustable cup is connected with the machine frame, the drawing plugging element abuts against the bottom of the volume-adjustable cup, the independent discharging guide pipe is arranged below the volume-adjustable cup, and the drawing plugging element is arranged between the independent discharging guide pipe and the volume-adjustable cup. The independent discharging guide pipe is communicated with the volume-adjustable cup through the drawing plugging element, and the independent discharging guide pipe can be inserted into a converter reaction pipe; and one end of the drawing plugging element is arranged in the rack. According to the mercury-free catalyst filling device, quantitative filling can be realized, the loss of a gold catalyst caused by secondary extraction in mercury-free catalyst filling is reduced, and the operation is simple.

The invention discloses a sodium vanadium fluorophosphate nanofiber positive electrode composite material as well as a preparation method and application thereof. The method comprises the following steps: adding a vanadium source and a reducing agent into deionized water according to a certain proportion, stirring, then adding a sodium source, a phosphorus source, a fluorine source and a solvent N, N-dimethylformamide, and continuously stirring to obtain a solution A; adding polyacrylonitrile into a solvent N, N-dimethylformamide, and stirring to obtain a solution B; mixing and stirring the solution A and the solution B to obtain an electrostatic spinning solution, and then performing electrostatic spinning to obtain a nanofiber positive electrode material precursor; and sintering the precursor in a tubular furnace to obtain the sodium vanadium fluorophosphate nanofiber positive electrode composite material. The sodium vanadium fluorophosphate nanofiber positive electrode composite material obtained by the invention has high specific surface area and high conductivity, is beneficial to rapid conduction of electrons and ions, and improves the overall cycle efficiency and power density of the battery.

The invention relates to an electrolyte for stabilizing an alloy negative electrode of a sodium-ion battery and a battery system. The electrolyte comprises an ether solvent, an additive and sodium salt. The electrolyte contains the ether solvent, the additive and the sodium salt, and a thin and elastic SEI film can be formed on an alloy negative electrode through the ether solvent and the additive with a set structure, so that the influence of volume expansion of a negative electrode material on SEI is reduced, and the possibility of cracking and reconstruction of the SEI is reduced; a polymer film can be formed on the surface of the alloy negative electrode, and the stability and cycle life of the alloy negative electrode are improved.

The invention discloses a lithium battery composite negative electrode material and a preparation method thereof, and belongs to the technical field of lithium batteries. According to the invention, a Fe-Ni metal organic framework is used as a base material, and the Fe-Ni metal organic framework and modified nano silicon powder are subjected to high-temperature pyrolysis to prepare the lithium battery composite negative electrode material. The material is a porous carbon-silicon composite material, has relatively high specific surface area and porosity, can provide more active sites, is beneficial to intercalation and deintercalation of lithium ions, and meanwhile, the porous structure can also relieve the problem of volume expansion of the silicon material in the charge-discharge process. The composite negative electrode material disclosed by the invention not only utilizes the high lithium storage capacity of silicon, but also can exert the excellent conductivity and structural stability of the porous carbon material, and is high in specific capacity and excellent in electrochemical performance.

The invention provides a preparation method and application of a lithium ion battery glass anode material, and belongs to the field of new energy material recovery and regeneration. The preparation method comprises the following steps: loading anode waste containing graphite into a quartz reactor, applying voltage to perform flash evaporation Joule heating, and performing acid leaching and drying on a product to obtain flash evaporation regenerated graphite; the preparation method comprises the following steps: mixing imidazole, benzimidazole and Co (NO3) 2.6 H2O, performing solvothermal pretreatment to obtain ZIF-62 crystals, calcining at high temperature, and naturally cooling to obtain ZIF-62 glass; mixing the flash evaporation regenerated graphite and carbon black to prepare a composite conductive agent; and mixing the composite conductive agent with ZIF-62 glass and a binder to obtain the lithium ion battery glass anode material. The glass anode synthesis strategy provided by the invention meets the requirement of environmental sustainability, the electrochemical performance of the ZIF-62 glass is effectively improved, and the regeneration potential of graphite in the waste anode material is exerted to the maximum extent; according to the invention, high-value utilization of graphite is facilitated, and a new view angle is provided for developing a low-cost, high-performance and sustainable battery technology.

The invention relates to aqueous battery positive electrode slurry and a preparation method and application thereof. The aqueous zinc ion battery positive electrode slurry comprises a positive electrode active substance, a conductive agent, a binder, a water-retaining agent and a solvent, and the substances are mixed in proportion and fully ground to prepare the positive electrode slurry. The water-retaining agent enables the slurry to have good rheological properties, and when the water-retaining agent is used in cooperation with the binder, a good three-dimensional network structure can be constructed. Rich polar groups of the water-retaining agent endow the electrode plate with better infiltration performance, the electrode plate is prevented from cracking and powdering in the drying process of the electrode plate, meanwhile, the prepared positive electrode plate has good electrolyte absorption capacity, and stable and long-term circulation can be achieved when the prepared positive electrode plate is matched with a zinc negative electrode and a zinc sulfate electrolyte.

The invention belongs to the field of lithium ion batteries, and discloses a preparation method of medium-high nickel ternary positive electrode material powder, which comprises the following steps: mixing a nickel-cobalt-manganese precursor, a lithium source and a dopant to obtain a mixed material; sintering, cooling, crushing and sieving the mixed material to obtain sintered powder; mixing the sintered powder with phosphorus source powder and lanthanum source powder, calcining, cooling, crushing and sieving to obtain medium-high nickel ternary positive electrode material powder; the phosphorus source powder and the lanthanum source powder are subjected to low-temperature melting coating, so that the performance of the positive electrode material is improved while residual lithium is reduced. In addition, the invention also discloses the medium-high nickel ternary positive electrode material powder prepared by the method and a medium-high nickel ternary positive electrode plate prepared from the medium-high nickel ternary positive electrode material powder.

The invention discloses a microporous carbon-coated core-shell nano composite material, a preparation method and application, and relates to the technical field of lithium batteries, and the preparation method comprises the following steps: uniformly dispersing silicon powder and graphite in a solvent to form a core material suspension; dopamine hydrochloride and hydrogen peroxide are added into the nuclear material suspension, polymerization reaction is carried out at the temperature of 60-85 DEG C, composite slurry is obtained, and the ratio of the total mass of the silicon powder and the graphite to the mass of the dopamine hydrochloride is 1: (0.1-0.5); carrying out spray drying treatment on the composite slurry to obtain precursor powder; sintering the precursor powder at high temperature to obtain a microporous carbon coated core-shell nano composite material; the microporous carbon-coated silicon / graphite core-shell nano composite material is prepared by adopting a polydopamine in-situ polymerization technology initiated by hydrogen peroxide and combining a subsequent spray drying and carbonization process, and the material has good rate capability, cycling stability, charge-discharge efficiency and low interface impedance.

The present application relates to the technical field of sodium ion battery negative electrode material, and specifically to modified hard carbon negative electrode material and its preparation method and application, the present application takes biomass waste oil tea shell as raw material, adopts sulfuric acid and phosphoric acid as dopant, carries out porosification and activation, obtains P, S double atom doping pre-carbonization porous carbon material after carbonization, takes tetraethyl orthosilicate as raw material to prepare nano SiO2 microspheres under catalysis, carries out carbonization after blending nano SiO2 microspheres and P, S double atom doping pre-carbonization porous carbon material, obtains modified hard carbon negative electrode material through pyrolysis reaction with magnesium powder at the same time of carbonization, the element doping in modified hard carbon negative electrode material provides more active sites for sodium ion storage, improves the theoretical capacity and conductivity of the material, and the nanoscale silicon powder reduces the pulverization phenomenon caused by volume expansion when silicon is used as the negative electrode material of sodium ion battery due to the special size effect, reduces the attenuation of battery capacity.

The invention relates to the field of battery materials, in particular to a negative plate and a battery comprising the same. The negative electrode plate comprises a porous current collector, a negative electrode active material layer arranged on at least one surface of the porous current collector and a surface coating layer arranged on one side, deviating from the porous current collector, of the negative electrode active material layer, and the negative electrode active material layer comprises a negative electrode active material. The negative electrode active substance comprises black phosphorus or a black phosphorus compound, the surface coating comprises a high-temperature-resistant material, and the high-temperature-resistant material comprises a ceramic material and / or an organic polymer with the thermal decomposition temperature being greater than or equal to 200 DEG C. The surface of the negative active material layer is coated with a ceramic coating or an organic polymer with high thermal stability, so that the thermal stability of the negative plate is greatly improved, and the problem of combustion safety caused by overhigh temperature rise during charging and discharging of the battery is solved.

This invention relates to the field of anode materials, specifically to an antimony-based anode material, its preparation method, and a lithium-ion battery. The method involves preparing Schiff base-functionalized carbon quantum dots by adding a phosphorus source, an antimony source, and the Schiff base-functionalized carbon quantum dots to a reaction solvent, followed by a solvothermal reaction. This antimony-based anode material achieves a synergistic improvement in high specific capacity, long cycle life, excellent rate performance, and high structural stability, making it a highly promising anode material for lithium batteries, particularly suitable for high-energy-density, long-life lithium-ion batteries.

The invention relates to the technical field of waste gas treatment, and discloses a hazardous waste incineration flue gas efficient denitration device and method.The hazardous waste incineration flue gas efficient denitration device comprises a first tower body, a top tray is fixedly installed at the top of the first tower body, a spraying box is arranged on the side face of the first tower body, and the output end of the spraying box communicates with a heat exchanger; the heat exchanger penetrates through the top tray and is communicated with the first tower body, a denitration mechanism, a driving mechanism and an adjusting mechanism are respectively arranged in the first tower body, a front deacidification pool is arranged below the first tower body, a mixer is arranged in the front deacidification pool, a plurality of spray valves are arranged at the top of the mixer, and the spray valves are communicated with the first tower body. The input end and the output end of the front deacidification pool are respectively communicated with a waste gas channel and a bag-type dust collector, the bag-type dust collector is communicated with the spraying box, and the denitration mechanism is arranged, so that the first catalyst bed is movably arranged, the side surface of the first catalyst bed is provided with a corresponding heat discharge port, and when the temperature of the first catalyst bed is high, the first catalyst bed is subjected to heat dissipation treatment.

The invention relates to the technical field of pressure swing adsorption towers, and particularly discloses a pressure swing adsorption tower with a gas uniform distribution filtering mechanism, the pressure swing adsorption tower comprises a tower body, the bottom end of the tower body is provided with a tower bottom cover, and the top end of the tower body is provided with a tower top cover; the three filtering and separating assemblies are mounted on the inner wall of the tower body, an adsorbent is arranged between every two adjacent filtering and separating assemblies, and reinforcing structures are arranged in the filtering and separating assemblies; and the multiple flow dividing cylinders are distributed in an array mode, and each flow dividing cylinder is located between every two adjacent filtering and separating assemblies and inserted into the corresponding adsorbent. According to the invention, the conventional mode that gas enters the adsorbent in a point-surface mode is replaced, the adsorbent enters in a three-dimensional space mode, the pulverization or failure of the adsorbent close to the gas inlet is slowed down, the replacement frequency of the adsorbent is reduced, the production cost is reduced, a multi-point isobaric gas conveying structure is provided, and the effect that the gas is led to the adsorbent is improved.

The utility model relates to the technical field of molecular sieve adsorbers, and discloses a filterable anti-blocking molecular sieve adsorber which comprises a shell, a sealing door is arranged on the front side of the shell, supporting legs are fixedly mounted at the bottom of the shell, a fixing plate is fixedly mounted at the bottoms of the supporting legs, a filtering mechanism is arranged at the top of the shell, and the filtering mechanism is arranged on the front side of the shell. A processing mechanism is arranged in the shell, gas is conveniently filtered through a flexible filter screen, a filter frame is conveniently limited through a stop rod, a cover plate is rapidly limited and disassembled through an insertion rod, operation is rapid, a double-shaft motor is started to enable a rotating rod to rotate, and under cooperation of a knocking block, the cover plate can be conveniently separated from the filter frame, so that the cover plate can be conveniently separated from the filter frame. And a hand wheel is manually rotated, so that a rotating drum and a connecting rod are rotated until a roller is in contact with the filtering frame, and the filtering frame is conveniently lifted and taken.

The application relates to the technical field of zinc oxide materials, and discloses zinc-based isomeric zinc oxide as well as a preparation method and application thereof. The zinc-based isomeric zinc oxide is used for ship antifouling paint, and the zinc-based isomeric zinc oxide comprises a crystal nucleus layer, the chemical general formula of the crystal nucleus layer is: [(ZnO) x (Si a , Mg b , Zn c , Ni d )Al2O 4z ] y , x=0.5-1.2, a=0.1-0.3, b=0.05-0.15, c=0.2-0.4, d=0.02-0.08, z=0.8-1.2, and y=0.9-1.1. The zinc-based isomeric zinc oxide contains zinc oxide phases and zinc-based spinel solid solution phases, the two phases form low-energy coherent interfaces through interface reconstruction, the release rate of zinc ions can be controlled, marine toxicity caused by explosive release can be avoided, marine organism adhesion can be reduced, the powdering degree of the antifouling paint coating can be reduced, and the corrosion current density can be reduced, and therefore the zinc-based isomeric zinc oxide is suitable for environmentally-friendly ship antifouling paint.

The invention relates to the field of denitration catalysts, and particularly discloses a denitration catalyst reclaimed material recycling method. The recycling method of the denitration catalyst reclaimed material comprises the following steps: (1) pretreatment: crushing the denitration catalyst reclaimed material, and sieving with a 16-mesh sieve; (2) cleaning: soaking the powder in a hydrochloric acid solution with the concentration of 4-8% for 11-12 hours, and washing with water until the powder is neutral; (3) purification: putting the cleaned recycled material into a rotary reactor, adding an ammonium sulfate solution with the mass fraction of 8-12%, controlling the reaction temperature to be 60-70 DEG C, and continuing for 2-2.2 hours; (4) regeneration: drying the purified recycled material, and then carrying out high-temperature calcination in an inert gas atmosphere for 3.5-4 hours; in addition, the preparation method provided by the invention has the advantage of effectively reducing potassium and arsenic in the recycled material.

The invention discloses high-temperature-resistant special high-strength sulphoaluminate cement as well as a preparation process and application thereof. The mineral phase of the cement clinker comprises the following components in percentage by weight: 10.56%-15.21% of calcium sulphoaluminate (C4A3), 17.40%-26.45% of alpha-dicalcium silicate (alpha-C2S), 5.11%-9.67% of beta-C2S, 15.75%-25.66% of a Q phase, 22.61%-34.88% of calcium aluminate (CA), 4.33%-8.50% of calcium aluminoferrite (C4AF) and the balance of unavoidable impurity phases. The raw materials of the cement clinker are also doped with a modifier, and the modifier simultaneously comprises a metal oxide and a non-metal substance. The novel high-temperature-resistant sulphoaluminate cement is prepared by replacing high-quality raw materials with low-grade solid wastes, and the problems that the compressive strength increase in the later period is insufficient and the belite phase is easily converted to poor crystal form gamma-C2S are solved.

The utility model discloses a high molecular sieve tower with high adsorption rate, which comprises a tower body, an upper tower body and a lower tower body, and the upper tower body is detachably connected with the lower tower body; a first partition plate and a second partition plate are arranged in the lower tower body, and a distance for mounting a molecular sieve is arranged between the first partition plate and the second partition plate; a gas outlet is formed in the top of the upper tower body, and a gas inlet is formed in the bottom of the lower tower body; an exhaust port is formed in one side of the upper tower body; the air flow adjusting assembly is arranged at the air inlet and can change the flow direction of the air flow; the porous arc-shaped sieve plate is arranged in the lower tower body; and the air inlet is positioned between the air inlet and the second partition plate. The utility model has the benefits that the service life of the molecular sieve is prolonged, and the oxygen production efficiency is improved.

The invention relates to an effervescent water-soluble fertilizer and a preparation method thereof, the effervescent water-soluble fertilizer is composed of organic acid and / or acid salt with more than 6 carbon atoms, acid carbonate and a water-soluble fertilizer raw material, and is characterized in that the water-soluble fertilizer raw material does not contain urea, the organic acid and / or acid salt with more than 6 carbon atoms is dissolved in water, and the water-soluble fertilizer raw material contains urea. Or a product obtained after the reaction with the acid carbonate is dissolved in water. The effervescent water-soluble fertilizer is high in dissolving speed, and the problems of pulverization and caking in the storage process of the effervescent water-soluble fertilizer can be effectively solved.

The invention belongs to the technical field of lithium ion battery materials, and relates to a salt-assisted inner and outer double-layer carbon-coated silicon material, a preparation method and application thereof, and the preparation method comprises the following steps: S1, preparing a single-layer carbon inner-coated silicon material C (at) Si; s2, filling pores with inorganic salt; s3, preparing an outer carbon coating layer; s4, carrying out pre-carbonization in an inert atmosphere; s5, washing in an aqueous solution, and drying; and S6, performing high-temperature carbonization in an inert atmosphere to obtain the salt-assisted inner and outer double-layer carbon-coated silicon material C (at) Si (at) C. The silicon material with a special core-shell structure prepared in a salt-assisted inner and outer double-layer carbon coating mode is used as a lithium ion battery negative electrode material, the electrochemical performance of the material can be improved, and the conductivity, the chemical stability and the safety are improved; and the preparation method is simple, the process is short, the preparation temperature is low, the potential safety hazard in the preparation process is low, the raw materials are cheap and easy to obtain, and the production cost can be saved.

The invention relates to the technical field of hydrogen storage, in particular to a hydrogen storage component and a preparation method of the hydrogen storage component, and the hydrogen storage component comprises a supporting layer and a hydrogen storage layer; wherein the number of the supporting layers and the number of the hydrogen storage layers are both multiple, the supporting layers and the hydrogen storage layers are sequentially and alternately arranged in the preset direction, and the supporting layers and the hydrogen storage layers are bonded together through adhesives; the supporting layer is formed by fibers, and the hydrogen storage layer is formed by a mixture of a hydrogen storage material and a heat conduction material. It can be seen that the novel hydrogen storage structure is mainly composed of the fiber, the hydrogen storage material, the heat conduction material and the adhesive, the fiber layer plays a role in supporting the hydrogen storage material and the heat conduction material, the strength of the structure is enhanced, and the hydrogen storage material and the heat conduction material mainly improve the heat exchange performance of the structure; the adhesive mainly plays a role in fixing the whole structure, so that the whole structure is kept in a certain shape, and material deformation and pulverization caused by expansion in the hydrogen absorption and desorption process of the hydrogen storage material are weakened.

The invention relates to a metal lithium composite negative electrode and a preparation method thereof and a metal lithium battery, the negative electrode comprises a lithium-containing layer, and an interface stable layer is arranged on the surface of the lithium-containing layer; the interface stabilizing layer comprises a carbon fluoride material, a nano carbon material and an interface stabilizer. A carbon fluoride material in the interface stable layer is in contact with the lithium-containing layer, lithium fluoride can be generated in situ, and the lithium fluoride has the effect of stabilizing the interface of the composite negative electrode and an electrolyte, so that uniform deposition of lithium is facilitated, and generation of lithium dendrites is inhibited; a three-dimensional network channel structure is constructed by the nano carbon material, so that lithium ions and electrons can be regulated and controlled at the same time, uniform deposition of lithium is facilitated, and meanwhile, an effect of connecting a lithium-containing layer and an interface stabilizing layer is also achieved; the interface stabilizer is specifically selected and has a synergistic effect with the carbon fluoride material and the nano carbon material, so that the mechanical property of the interface layer and the stability of the composite negative electrode are remarkably enhanced, and the composite negative electrode has excellent cycle performance and rate capability.