168results about How to "Inhibit side effects" patented technology

The invention belongs to the field of sodium-ion batteries, and discloses a sodium-ion battery electrolyte and a sodium-ion battery. The sodium-ion battery electrolyte comprises sodium salt, an organic solvent and an organic molecular additive shown in the following formula, wherein R1 to R5 are respectively and independently any one of F, Cl, Br, I, CN, H, OH, SH and NO2. A boron atom in the molecular structure of the additive is used as an electron-deficient center and can be preferentially complexed with anions or solvent molecules in the electrolyte to pre-stabilize an electrode interface; the bond energy of the B-O bond is moderate, so that the oxidation potential of the B-O bond is lower than that of a main body carbonate solvent, the B-O bond can be preferentially decomposed in the first charge-discharge process, and a thin, compact and highly stable positive electrode electrolyte interface film is formed on the surface of a positive electrode; the controllable substituent group on the benzene ring further regulates the decomposition potential of molecules through an electronic effect, so that the film forming time and the film property can be precisely regulated and controlled. The stable CEI can effectively inhibit continuous decomposition of the electrolyte at high temperature and high pressure, and the cycling stability of the battery in the high-temperature and high-pressure environment is remarkably improved.

The invention discloses a method for selectively separating valuable metals from a positive electrode material of a waste lithium battery, and belongs to the technical field of resource recycling of waste lithium ion batteries. The method comprises the following steps: preparing an aprotic deep eutectic solvent (DES) as a leaching agent and an electrolyte at the same time; the method comprises the following steps: adding a waste positive electrode material into DES, and leaching to obtain a DES leaching-electrolyte system; according to the method, the pulse voltage is applied in stages, selective separation of nickel, cobalt and manganese is achieved by controlling the pulse peak voltage (the first stage is-0.8 V to-1.0 V, the second stage is-1.0 V to-1.2 V, and the third stage is-1.2 V to-1.5 V), and the pulse frequency and the duty ratio are used for regulating and enhancing mass transfer and restraining side reactions. According to the method, the metal deposition potential difference is expanded through DES coordination regulation and control, efficient selective separation of nickel, cobalt and manganese is achieved in combination with pulse step-by-step voltage control, and the method has the advantages of being high in separation efficiency, few in side reaction, simplified in process, high in product purity and the like.

The present application relates to the technical field of sodium battery materials, in particular to a sodium supplement coating based on a spiral iron-carbon composite material and a preparation method thereof, a spiral polypyrrole template is synthesized by a chiral template method, Fe3C@CNS spiral carbon composite material rich in Fe3C nanocrystals and iron single-atom sites is prepared through iron loading, sulfidation and high-temperature pyrolysis, Na2C2O4@Fe3C@CNS composite material is prepared by highly dispersing sodium oxalate on the surface and in the pores of the spiral carbon composite material through a recrystallization method, finally, a slurry is prepared by mixing the Na2C2O4@Fe3C@CNS composite material with a conductive agent and a binder, and the slurry is coated on the surface of an electrode to form a functional sodium supplement coating. The sodium supplement coating based on the spiral iron-carbon composite material and the preparation method thereof solve the problems of poor interface stability and first-cycle irreversible sodium loss of existing sodium ion batteries, realize efficient sodium pre-activation and interface synergistic regulation, and improve the comprehensive performance of the battery.

The utility model provides a kind of for the illumination reaction device of alfacalcidol, including the liquid storage tank to be lighted, circulating pump and illumination reaction tank formed by pipeline connection circulation passway, wherein: illumination reaction tank center is provided with the LED light of cylindrical shape, and there are a plurality of upper and lower interval arrangement partition plates in periphery, and the serpentine reaction channel of upper and lower bending is formed between a plurality of partition plates.The utility model illumination reaction device can realize uniform stable illumination reaction by the design of illumination reaction tank and serpentine reaction channel, reduce the optical path of reaction liquid, improve alfacalcidol illumination reaction efficiency and product quality consistency, effectively overcome the technical defects of traditional equipment.

The application discloses a niobium-based compound / silicon-carbon composite material and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries.The composite material comprises a silicon-based material, a plurality of niobium-based compound particles anchored on the outer surface of the silicon-based material, and a carbon nano layer coated on the outer surfaces of the silicon-based material and the plurality of niobium-based compound particles.The composite material is realized by using a simple, convenient and industrialized production liquid phase method.The composite material obtained by the preparation method effectively alleviates the volume expansion of the silicon-based material and avoids the problem of niobium-based compound falling off, and when the composite material is applied to a lithium ion battery as a negative electrode material, excellent rate performance and cycle stability are exhibited.

The utility model belongs to the technical field of anti - flash rust inhibitor production equipment, concretely relates to a kind of low molybdenum type anti - flash rust inhibitor production device of ph value regulation and control, including reaction kettle, reaction kettle is connected by positive pressure feeding line communication acid storage high tank, alkali storage high tank, and positive pressure feeding line includes two discharge pipes, the tank bottom of two discharge pipes is communicated respectively the acid storage high tank, alkali storage high tank, discharge pipe is connected with feed pipe, feed pipe is connected with venturi pipe throat part, and venturi pipe is installed on nitrogen tube, and nitrogen tube is connected with spray pipe, and one end of spray pipe inserted into reaction kettle interior is equipped with atomizing nozzle, and regulating valve and float flowmeter are installed on feed pipe. By observing float flowmeter and adjusting regulating valve, acid liquor or alkali liquor is added into reaction kettle at uniform speed, controllable, and production efficiency and production quality are considered;Gas-liquid mixture is sprayed at high speed by atomizing nozzle, so that acid liquor or alkali liquor is fully and uniformly contacted with reaction liquid, and side reaction caused by local over-acid or over-alkali of reaction liquid is avoided.

The application provides a synthesis method of active piperidone alkaloid, and the active piperidone alkaloid is Dysidone A. The raw material piperidine is used as a substrate, and the substrate is reacted with p-methoxy benzyl chloride under the condition of N,N-diisopropylethylamine, so that the secondary amine is protected, and the side reaction of sodium hydride and hydrogen on the secondary amine is avoided. Then, the secondary amine is oxidized under the condition of iodine and iodobenzenediacetic acid. Next, the secondary amine is reacted with triethyl phosphine acetic acid ester to obtain an alpha, beta unsaturated ester. Then, the p-methoxy benzyl protection is removed by using ammonium cerium nitrate in a mild and efficient manner. Finally, the ester is reduced into an alcohol by using diisobutylaluminum hydride. The piperidone alkaloid or the like is obtained through five reaction steps. The synthesis process is simple, the raw material is cheap and easy to obtain, the cost is low, the reaction condition is relatively mild, the purity is high, and the method has good economic and social benefits.

The present application relates to the technical field of polyester material modification, and particularly relates to a high-transparency polyethylene naphthalate material, a preparation method and application, aiming at the problems of fast crystallization rate of the PEN material in the process of processing and molding, easy crystallization of thick products, light transmittance reduction caused by the crystallization, and insufficient material toughness, the present application introduces a diol monomer containing a side group and a flexible chain segment diol monomer into the PEN melt polycondensation process for copolymerization, wherein the diol containing a side group introduces a steric hindrance structure in the molecular chain to destroy the regular packing of the PEN molecular chain, thereby inhibiting the material crystallization behavior and improving the light transmittance of the thick product; the flexible diol introduces a flexible chain segment in the molecular chain to increase the free volume of the molecular chain and improve the molecular chain movement ability, thereby improving the material toughness. Through the above-mentioned synergistic copolymerization modification method, the crystallization tendency of the PEN material can be effectively reduced, the obtained PEN thick product has excellent light transmittance and toughness at the same time, and is suitable for the preparation of high-performance transparent polyester products.

This invention discloses a method for synthesizing potassium 4-methoxysalicylate based on supramolecular-assisted methylation, belonging to the field of organic synthesis technology. The process is based on supramolecular chemistry principles and includes the following steps: (1) Preparation of a macrocyclic host molecule-methylating agent complex loaded with a methylating agent: The macrocyclic host molecule and the methylating agent are reacted at pH 7-9 and 25-40℃ to form a complex solution; (2) One-pot preparation of the target product: 2,4-dihydroxybenzoic acid is salted with potassium hydroxide, potassium carbonate is added, and the above complex solution is added dropwise. A selective methylation reaction is carried out at 55-65℃. After the reaction is complete, post-treatment yields the product. This invention utilizes the molecular recognition function of the macrocyclic host to achieve highly selective methylation of the 4-hydroxyl group under mild conditions. This process has the advantages of simple operation, high safety, low waste, and recyclable host molecules. The yield of potassium 4-methoxysalicylate can reach over 85%, and the purity exceeds 99.0%.

The invention belongs to the technical field of isotope recovery and separation, and discloses a method for recovering high-abundance C13 carbon dioxide from C13 urea based on acidic constant-temperature hydrolysis. According to the method, the hydrolysis rate of the C13 urea is maintained by selecting proper dilute sulfuric acid concentration, sulfate radicals and urea are prevented from forming an adduct by controlling the dilute sulfuric acid concentration, the release efficiency of the 13CO2 is increased, the reaction rate is controlled, and side reaction is avoided. The invention further provides a set of reaction device for recycling 13CO2 through acidic constant-temperature hydrolysis of C13 urea under reduced pressure, the gas-liquid phase contact area and residence time are remarkably increased by arranging the rectifying column, visual water removal and low temperature are realized through the water removal column and the condenser pipe, the problems of external CO2 pollution, high impurity air content and relatively high water content are solved, and the method is suitable for industrial production. And high abundance recovery of the 13CO2 is ensured.

The application relates to a high-performance anode-free aqueous zinc metal battery based on a composite layered negative electrode current collector, comprising the steps of: coating a conductive layer on the surface of a zinc metal deposition base; configuring a guide layer solvent and coating the guide layer on the conductive layer by a coating method, and then drying in an oven. The application has the beneficial effects that: the application is provided with the conductive layer, which provides uniform deposition sites for zinc ions during the charging process; the guide layer skeleton is arranged, so that the zinc ions are uniformly deposited on the surface of the conductive layer, the growth of zinc dendrites is inhibited, and the risk of battery short circuit is effectively reduced; the guide layer adopts a hydrophobic adhesive, so that the side reaction between active zinc and electrolyte on the negative electrode can be effectively avoided, and the capacity retention rate can be prevented from being reduced with the increase of the cycle number; the anode-free system is adopted, so that the energy density of the battery is greatly improved; the material cost is low, the preparation method is simple in process and good in repeatability, and the application can be mass-produced under the existing production conditions.

The application discloses a zinc battery negative electrode material, a preparation method thereof and a zinc ion battery. The zinc battery negative electrode material is a composite of a carbon base material and zinc nanoparticles; the carbon base material is a porous carbon material with through nano or sub-micron channels, the zinc nanoparticles are distributed in the channels of the carbon base material, the surface of the zinc nanoparticles is wrapped by a carbon network, and the carbon network anchors the zinc nanoparticles in the channels of the carbon base material. A pulse mode is adopted to alternately introduce zinc sources and carbon sources, and interval purging is performed after each introduction; in view of the unique physical and chemical characteristics of zinc, a synergistic process of "functional group guidance-pulse deposition-immediate anchoring" is designed, so that the deposition of zinc nanoparticles and the growth of the carbon network are alternately performed. The zinc battery negative electrode material can not only inhibit the growth of zinc particles in a long-term electrochemical cycle process, improve the utilization rate of zinc, but also reduce the direct contact area of zinc and electrolyte, and is helpful to inhibit the occurrence of side reactions such as hydrogen evolution.

This invention relates to the preparation and application of silicon-carbon anode materials, and discloses a silicon-carbon anode material modified with lithium phosphide nanoparticles, its preparation method, and a secondary battery. The material has a core-shell structure, with the core comprising porous carbon and lithium phosphide nanoparticles and silicon nanoparticles generated in situ within the micropores of the porous carbon; the shell comprises a composite coating layer composed of amorphous carbon and carbon nanotubes; silicon accounts for 45-65 wt% of the modified silicon-carbon anode material by mass, and the P / Si molar ratio of the lithium phosphide nanoparticles to the silicon nanoparticles is 2:98~30:70. A small amount of phosphorus source is first deposited in the porous carbon micropores, followed by lithiation treatment to convert the phosphorus in the porous carbon into lithium phosphide nanoparticles, then a second deposition of silicon nanoparticles, and finally overall carbon coating. This invention's modified silicon-carbon anode material improves the problem of rapid impedance increase in the low-charge range of silicon-carbon anode materials, significantly enhancing the user experience.

The application belongs to the technical field of caffeine purification, and discloses a sublimation refining device for caffeine purification, which comprises a rack, a sealed box arranged on the rack, a material disc cooperatively connected to the bottom of the sealed box, and a main motor for providing rotary power; the main motor is drivingly connected with a main shaft longitudinally penetrating through the sealed box. The heat-conducting oil in the oil storage pipe is heated by the built-in electric heating rod, and the heat is conducted to the heat exchange pipe to form an internal heating structure. The heat exchange pipe is inserted into the material, and the serpentine structure increases the effective heat exchange area. The mechanical mixing action of the material turning frame continuously breaks the temperature boundary layer inside the material. This internal dynamic heat transfer mechanism ensures that the material is heated in a uniform state, avoids the coking or sticking phenomenon caused by local overheating, improves the heat transfer efficiency, and makes the caffeine sublimate in a stable thermodynamic state, thereby improving the overall material utilization rate and sublimation quality.

The invention provides a preparation method of a carotenoid dispersion emulsion, which comprises the following steps: preparing a water phase by using a protective colloid, a filler and water, preparing an oil phase by using carotenoid crystals, an antioxidant and a supercritical solvent, mixing the oil phase and the water phase, emulsifying, and removing the supercritical solvent after emulsifying to obtain the carotenoid dispersion emulsion. The protective colloid is starch sodium octenylsuccinate of which the molar substitution degree does not exceed 6%. The invention also provides a preparation method of the carotenoid microcapsule. According to the preparation method provided by the invention, by selecting the specific protective colloid and the oil-phase solvent, the carotenoid can be better protected, side reaction caused by a high-temperature process can be avoided, and the risk of solvent residue is reduced.

A synthesis method of crisaborole relates to the field of chemical synthesis, and adopts a cyano-free compound A and a cyano-free compound B as initial raw materials, and crisaborole is prepared through the reaction steps of nucleophilic coupling reaction, reduction, hydroxyl protection, borylation, deprotection, oxidation, cyanation and the like. According to the synthesis method, a traditional synthesis mode is changed, and cyano group construction is carried out at the end, so that the problem of side reaction caused by cyano groups in the borylation process is avoided. The synthesis method is simple and convenient to operate, mild in reaction condition and relatively high in overall yield, avoids the use of a transition metal catalyst, is very suitable for being applied to drug production, and has a relatively good application prospect.

The application discloses a gradient electron regulation type noble metal-transition metal bifunctional catalyst and a preparation method and application thereof, and comprises active metal components A, auxiliary active metal components B, oxide carriers C and surface electron regulation components D. In the application, the noble metal is enriched on the outer layer of the carrier, directly participates in the surface catalytic reaction, the catalytic efficiency of unit mass noble metal is significantly improved, and excellent hydrogenation and dehydrogenation performance can be realized. The inner layer transition metal promotes hydrogen overflow and hydrogenation activity, the outer layer noble metal provides efficient dehydrogenation sites, and the two realize ordered division and cooperation in space through the gradient distribution structure, thereby solving the problem of disordered distribution of traditional two metals and insufficient cooperation effect. The gradient distribution structure reduces the migration and agglomeration tendency of metal particles in high-temperature circulation, the oxygen vacancies and basic sites of the oxide carrier inhibit carbon deposition, and the catalyst can maintain high activity and stability in multiple hydrogenation-dehydrogenation cycles, and the cycle life is significantly better than that of a conventional co-impregnated bimetallic catalyst.

The application provides a method for synthesizing 3-methyl-2-buten-1-ol, and belongs to the technical field of isopentenol synthesis. The method comprises the following steps: introducing 3-methyl-3-buten-1-ol and an atmosphere containing hydrogen into a fixed bed reactor, and performing a hydrogenation isomerization reaction under the action of a Pd / Al2O3 catalyst to generate 3-methyl-2-buten-1-ol; wherein the content of formaldehyde in the 3-methyl-3-buten-1-ol is 0.03-0.15%. The application adopts a fixed bed reactor to perform continuous production, adopts a Pd / Al2O3 catalyst with low palladium content as the catalyst, the preparation method is simple, the price is relatively low, and the content of formaldehyde in the 3-methyl-3-buten-1-ol is controlled to inhibit a side reaction, so that the reaction conversion rate and the product selectivity are high.

The application provides a battery, a battery pack and a power utilization device, the battery comprising a negative electrode sheet, the negative electrode sheet comprising a negative electrode current collector and a negative electrode active material layer arranged on at least one side of the negative electrode current collector; the negative electrode active material layer comprising a negative electrode active material; the negative electrode active material comprising a negative electrode active substance and a coating layer existing on the surface of the negative electrode active substance, the coating layer comprising amorphous carbon; and a SEI film existing on the surface of at least part of the negative electrode active material of the negative electrode active material layer, the SEI film containing fluorine elements and oxygen elements, and the atomic ratio of the oxygen elements to the fluorine elements in the SEI film being (1.5-7.5):1. The application can improve the fast charging performance, high-temperature storage and high-temperature cycle performance of the battery.

The invention discloses a rose spherical bismuthyl carbonate catalyst as well as a preparation method and application thereof, and belongs to the technical field of electro-catalytic materials. The catalyst is rose-ball-shaped Bi2O2CO3, is characterized by being formed by stacking and assembling nanosheets layer by layer, is large in specific surface area and rich in active sites, and has excellent selectivity and stability for preparing formic acid through electrocatalytic reduction of CO. According to the preparation method, a solvothermal method is adopted, bismuth nitrate pentahydrate is taken as a bismuth source, sodium citrate dehydrate and urea are taken as a composite carbon source, ethylene glycol and deionized water are taken as a mixed solvent, and morphology-controllable synthesis is realized by regulating and controlling the reaction temperature and time. According to the catalyst, the formic acid Faraday efficiency reaches 90% or above within the RHE potential range of-0.7 V vs to-1.2 V vs, the highest formic acid Faraday efficiency can reach 96.7%, the hydrogen evolution side reaction can be effectively inhibited, the stable catalytic performance is kept in the 16-hour continuous electrolysis process, and an efficient and feasible technical scheme is provided for COresource utilization.

This invention discloses a method for preparing 2,5-furandimethylamine, comprising the following steps: 1) preparing a 2,5-diformylfuran solution for later use; 2) taking the 2,5-diformylfuran solution prepared in step 1) into a reaction vessel, adding an inorganic amine source, an organic amine stabilizer, and a catalyst, reacting under a hydrogen atmosphere, and after the reaction is completed, cooling the reaction solution to room temperature, and slowly discharging the remaining hydrogen gas to obtain 2,5-furandimethylamine. The 2,5-furandimethylamine prepared by this method uses an inorganic ammonium salt as the amine source, which gradually decomposes to produce ammonia as the reaction temperature increases. At this temperature, the imine generated can be reduced in situ to a primary amine, avoiding the accumulation and aggregation of the imine intermediate, thereby avoiding the occurrence of side reactions. On the other hand, the use of a small amount of organic amine as a stabilizer further inhibits the occurrence of side reactions, increasing the yield of 2,5-furandimethylamine to 95%.

The embodiment of the present application relates to a kind of porous silicon-carbon composite material and its preparation method and application, the porous silicon-carbon composite material includes: porous silicon-carbon matrix, including as porous carbon matrix of porous carbon skeleton and the nano-silicon layer deposited on the outer surface and internal pore wall of porous carbon skeleton;Nano-fiber mesh passivation layer is the three-dimensional mesh structure that inorganic nano-fiber interweaves and overlaps each other;Nano-fiber mesh passivation layer is coated on the outer surface of porous silicon-carbon matrix, and / or in the internal pore of porous silicon-carbon matrix, to form passivation protection to nano-silicon layer;Carbon coating layer, coated on the outer surface of porous silicon-carbon matrix;Wherein, carbon coating layer at the outer surface of porous silicon-carbon matrix constitutes the outermost layer of porous silicon-carbon composite material.The porous silicon-carbon composite material is applied to lithium ion battery negative electrode, with the characteristics of high initial coulomb efficiency, low expansion rate.

This invention discloses a dynamically responsive electrolyte, its preparation method, and its applications. The electrolyte comprises a soluble metal salt, an active metal cation, an electric field-responsive ligand, and a self-healing additive. The molar ratio of the soluble metal salt, active metal cation, electric field-responsive ligand, and self-healing additive is 1:(0.05~6.0):(0.001~0.2):(3~100). The concentration of the soluble metal salt in the solvent is 0.2M to 5.0M. This electrolyte can intelligently and dynamically respond to changes in the local electrochemical environment, exhibiting the characteristics of actively intervening in and inhibiting dendrite growth.

The application belongs to the technical field of rubber additive synthesis, and particularly relates to a method for continuously preparing 4,4'-dithiodimorpholine. The method uses sulfur monochloride, morpholine, 32wt% liquid alkali (sodium hydroxide solution) and 120# solvent oil as raw materials, and generates 4,4'-dithiodimorpholine in a dynamic tubular reactor. After the reaction is completed, the material flowing out of the dynamic tubular reactor is collected, and the product is obtained through static layering, washing, filtering and drying. The method uses the dynamic tubular reactor for reaction, and the mass transfer and heat transfer efficiency are extremely high. The material is instantaneously and uniformly mixed, so that the morpholine and the sulfur monochloride are rapidly contacted and reacted, the reaction heat can be instantaneously removed, the optimal reaction temperature can be accurately maintained, the continuous production can be realized, the production capacity is greatly improved, the reaction time of the traditional kettle reactor is shortened from 2-7h to 10min, the raw material conversion rate is as high as 99% or more, and the goals of cost reduction and efficiency improvement, green safety are finally achieved.

The application belongs to the technical field of organic synthesis, and discloses a chloromethylation method and a preparation method of piperonyl butoxide. The chloromethylation method comprises the following steps: using a chlorine salt and concentrated sulfuric acid as precursors of a chloromethylation reagent, and performing a chloromethylation reaction on dihydrocuminaldehyde and trioxane. The chloromethylation method can ensure that a large amount of waste acid and new impurities are not introduced in the preparation process of piperonyl butoxide, and gas hydrogen chloride is not used, so that the safety is improved, and the obtained piperonyl butoxide is high-purity, for example, the purity is not less than 99.5%.

The invention belongs to the technical field of synthesis of organic compounds, and relates to a synthesis method of drometrisiloxane, which comprises the following steps: carrying out Williamson etherification reaction on an ultraviolet light absorber UV-P and methyl allyl chloride to obtain an intermediate I; carrying out Claisen rearrangement reaction on the intermediate I to obtain an intermediate II; and carrying out hydrosilylation reaction on the intermediate II and heptamethyltrisiloxane to obtain dromethicone, the Williamson etherification reaction comprises the following steps: dissolving an ultraviolet light absorber UV-P in an alcohol ether solvent, and reacting with methyl allyl chloride under the condition of an acid-binding agent. According to the synthesis method of the drometrisiloxane, the etherification reaction is efficient, simple and convenient, the hydrosilylation reaction catalyst is high in efficiency, the solvent system is green and economical, the overall process is high in yield and purity, and the product quality is excellent.

This invention discloses an aluminum-containing heavy water-based electrolyte, its preparation method, and its applications. The electrolyte comprises a solvent and a solute. The solvent includes heavy water, a deuterated solvent, and a low-barrier hydrogen bond reconstructing agent. The solute comprises a main aluminum salt and an auxiliary monovalent metal salt. This electrolyte can construct low-barrier hydrogen bonds in solution by controlling the solvent composition, significantly reducing the activity of water in the solution, improving the electrochemical stability of the solution, and suppressing side reactions. Simultaneously, it improves the electrochemical reaction behavior of aluminum in the solution and at the electrolyte / electrode interface, which is beneficial for improving the electrochemical deposition efficiency of aluminum in aqueous solution.

The invention relates to the technical field of lithium ion batteries, and discloses a high-nickel ternary positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing and sintering a nickel-cobalt-manganese precursor, a lithium source, niobium salt and fused salt. According to the preparation method of the high-nickel ternary positive electrode material provided by the invention, the niobium salt and the molten salt form a liquid phase environment at a relatively low temperature, and the niobium element can efficiently enter a crystal lattice, so that uniform bulk phase doping in a real sense is realized, and the electrochemical stability and the thermal stability are improved; meanwhile, the niobium doping can ensure the rapid and uniform transmission of the lithium source, so that the lithiation is more sufficient, and the lithium-nickel mixed arrangement caused by lithium deficiency is reduced in dynamics.

The application provides a preparation method of 1,2-pentanediol and belongs to the technical field of fine chemical synthesis. The 1,2-pentanediol is prepared by the following steps: furaldehyde, a solvent and a catalyst are loaded into a reaction kettle, nitrogen in the kettle is replaced by nitrogen gas, hydrogen in the kettle is replaced by hydrogen gas after the nitrogen replacement, and then the reaction is carried out by heating and hydrogen charging to obtain the 1,2-pentanediol; the catalyst uses hydrotalcite as a carrier, active components Ni and Cu are dispersed in the carrier, the loading amount of the active components is 5wt%-20wt%, the mass ratio of the Ni and the Cu is 1:2-3:1, and the specific surface area of the hydrotalcite carrier is 10-20m 2 / g. The method provided by the application is simple in process, high in yield, small in smell of prepared 1,2-pentanediol and suitable for daily chemical products.

This invention discloses a zinc battery anode material, its preparation method, and a zinc-ion battery. The zinc battery anode material is a composite of a carbon substrate and zinc nanoparticles. The carbon substrate is a porous carbon material with through-hole nano- or submicron pores. The zinc nanoparticles are distributed within the pores of the carbon substrate, and their surfaces are encapsulated by a carbon network, which anchors the zinc nanoparticles within the pores of the carbon substrate. A synergistic process of "functional group guidance—pulse deposition—instant anchoring" is designed, taking into account the unique physicochemical characteristics of zinc, to achieve alternating deposition of zinc nanoparticles and growth of the carbon network. This zinc battery anode material not only inhibits zinc particle growth and improves zinc utilization during long-term electrochemical cycling, but also reduces the direct contact area between zinc and the electrolyte, helping to suppress side reactions such as hydrogen evolution.