89results about How to "High electronegativity" patented technology

The invention relates to a preparation method of a high-hardness and high-sulfate-radical water quality scale inhibitor, and belongs to the technical field of water treatment.The preparation method comprises the steps that sodium carboxymethyl cellulose-sulfur quantum dots are prepared by using carboxymethyl cellulose as a stabilizer and then subjected to a copolymerization reaction with 2-acrylamido-2-methylpropanesulfonic acid and itaconic acid, and the high-hardness and high-sulfate-radical water quality scale inhibitor is obtained. The preparation method comprises the following steps: carrying out a reaction on sodium carboxymethyl cellulose and sulfur quantum dots to obtain modified sodium carboxymethyl cellulose-sulfur quantum dots, and carrying out a reaction on polysuccinimide, 4-amino phthalic acid and 2-aminoethanesulfonic acid to obtain a polyaspartic acid derivative; the modified sodium carboxymethyl cellulose-sulfur quantum dots and the polyaspartic acid derivative are mixed to serve as the scale inhibitor, the scale inhibition rate of the scale inhibitor is remarkably increased through the synergistic effect of the modified sodium carboxymethyl cellulose-sulfur quantum dots and the polyaspartic acid derivative, and meanwhile, due to the fact that a large number of new hydrogen bonds are generated between the modified sodium carboxymethyl cellulose-sulfur quantum dots and the polyaspartic acid derivative, the scale inhibition rate of the scale inhibitor is increased. The stability of a polymer structure is improved, so that the temperature resistance of the scale inhibitor is improved. The scale inhibitor is green and environment-friendly, and has excellent scale inhibition efficiency on high-hardness and high-sulfate-radical water.

The invention provides a B / N co-doped high-graphitization-degree artificial graphite negative electrode material and a preparation method thereof, and the preparation method of the artificial graphite negative electrode material comprises the following steps: crushing raw material coke to obtain primary particles, and then mixing, granulating and shaping to obtain secondary particles; fully mixing the obtained secondary particles with an organic nitrogen source, and then pre-carbonizing to obtain a nitrogen-doped precursor; and fully mixing the obtained nitrogen-doped precursor with an organic boron source, and then carrying out secondary carbonization, shaping and graphitization to obtain the B / N co-doped high-graphitization-degree artificial graphite negative electrode material. The artificial graphite negative electrode material disclosed by the invention has high energy density and high rate performance, and meanwhile, the first efficiency can also be improved.

The invention discloses TiO2-x (F) powder, a preparation method thereof and application of the TiO2-x (F) powder in strengthening the performance of a solid hydrogen storage material, and belongs to the technical field of hydrogen storage materials and preparation of the hydrogen storage materials. The problems that an existing magnesium-based solid hydrogen storage material is high in hydrogen desorption temperature, slow in low-temperature dynamics and the like are solved. According to the preparation method, the fluorinated transition metal Ti oxide additive doped with the oxygen vacancies is prepared, electrons of Mg are captured by utilizing the strong electronegativity of F atoms on the surfaces of transition metal Ti atoms, MgF2 active catalytic species are generated in the hydrogen absorption and desorption process, and the hydrogen storage performance of MgH2 is further improved. Meanwhile, the construction of oxygen vacancies on the surface of the transition metal Ti atom can provide active sites for Mg / MgH2 nucleation growth, can greatly accelerate the flow of electrons in the hydrogen absorption / desorption process, improves the thermal / dynamic performance, and realizes the reversible hydrogen absorption / desorption of the magnesium-based hydrogen storage material at low temperature.

The invention discloses a modified allyl benzoxazine resin composition, a layer-adding film as well as a preparation method and application of the layer-adding film, and belongs to the technical field of composite materials. The modified allyl benzoxazine resin composition comprises modified allyl benzoxazine resin, functional resin, a curing agent, a curing accelerator, an inorganic filler and an auxiliary agent, the modified allyl benzoxazine resin is prepared from the following raw materials: a modifier and allyl benzoxazine resin, the modifier comprises a first modifier; the first modifier is an amine fluorine-containing compound; the amine fluorine-containing compound is 2, 2-bis (4-allyloxyphenyl) hexafluoropropane, and the amine fluorine-containing compound is 2, 2-bis (4-allyloxyphenyl) hexafluoropropane. According to the invention, the amine fluorine-containing compound is adopted to modify the allyl benzoxazine resin, so that the modified allyl benzoxazine resin composition with low dielectric constant, low dielectric loss and low water absorption rate can be prepared, and the application requirements of a film increasing layer are met.

The invention belongs to the technical field of flow battery energy storage, and more specifically relates to a near-neutral total iron flow battery negative electrode electrolyte and a preparation method thereof, the negative electrode electrolyte is prepared from an iron salt, a chelating agent, a stabilizing agent, a supporting electrolyte and water at a certain temperature, the total iron concentration is 0.1-1.0 M, the molar ratio of the chelating agent to the iron salt is 1.2-2.0, the molar ratio of the stabilizing agent to the supporting electrolyte is 1.2-2.0, and the total iron concentration is 0.1-1.0 M. The molar ratio of the stabilizer to Fe is 0.25-1.0, the supporting electrolyte concentration is 0-2.0 mol / L, and the pH value is 7.0-8.5. The near-neutral negative electrode electrolyte for the total-iron flow battery is high in stability, can effectively inhibit generation of ferric hydroxide precipitates under a neutral condition, improves the stability of iron ions, greatly prolongs the cycle life of the total-iron flow battery, and can be widely applied to various aqueous flow batteries.

The invention relates to a preparation method of a biomass hard carbon negative electrode material and application of the biomass hard carbon negative electrode material in the field of energy storage. The method comprises the following steps: carrying out pretreatment, crushing and pre-carbonization treatment on a biomass raw material to obtain a pre-carbonized material; mixing and stirring the pre-carbonized material and an acid solution, washing and drying to obtain an acid-treated hard carbon material; soaking the obtained acid-treated hard carbon material in an alkaline solution, heating and stirring, washing and drying to obtain an alkali-treated hard carbon material; mixing the obtained alkali-treated hard carbon material with a pore-forming agent, carrying out ball milling, carrying out solid-liquid separation, and carrying out high-temperature carbonization and grinding on the obtained solid phase to obtain a powder sample; and mixing the obtained powder sample with hydrofluoric acid, and carrying out hydrothermal treatment to obtain the biomass hard carbon negative electrode material. The sodium ion battery prepared by taking the biomass hard carbon negative electrode material as a negative electrode material has the characteristics of high initial coulombic efficiency, high low-voltage platform specific capacity and excellent cycle performance and rate capability.

The invention relates to the technical field of powder coatings, in particular to high-fluidity superfine molding powder and a preparation method thereof. The high-fluidity superfine plastic powder comprises the following components in parts by weight: 40-50 parts of epoxy resin, 15-25 parts of a curing agent, 2-4 parts of a catalyst A, 3-5 parts of a plasticizer, 5-8 parts of polyacrylic acid and / or polyacrylate, 3-5 parts of a silane coupling agent, 10-20 parts of filler and 4-6 parts of other auxiliaries, the curing agent at least comprises a fluorine modified amine curing agent; and the median particle size D50 of the powder coating is 10-20 [mu] m. The powder coating adopting the epoxy resin / fluorine-modified amine curing agent system has better flowability and uniformity, charged powder particles can be guided to the surface of a workpiece under the action of an electric field to form a uniform thin coating, the powder particles are easier to carry charges with the same polarity, repulsive force among the particles is increased, and the powder coating can be applied to the surface of the workpiece. Uniform dispersion of powder particles can be kept, and the phenomenon of particle agglomeration is reduced.

The invention provides a lithium ion gel electrolyte, a preparation method and application. Relates to the field of lithium ion battery electrolyte preparation. The polymer monomer in the lithium ion gel electrolyte provided by the invention is pentaerythritol tetraacrylate with a fluorine group, a silane group or a siloxane group, so that the interface stability, the mechanical strength and the chemical stability of the battery can be remarkably improved on a micro level, and the cycle performance and the storage performance of the lithium ion battery are effectively improved.

The invention relates to the technical field of corrosion prevention, and discloses thiourea-graphene grafted chitosan modified polyurethane resin, a graphene material can form a corresponding physical barrier layer between a metal substrate and an active graft, the coating defect of a polyurethane coating is filled, a corresponding protective film is formed, and the corrosion resistance of the coating is improved. The graphene material has excellent wear resistance and mechanical properties, lone pair electrons provided by amino and hydroxyl on chitosan and sulfur atoms and nitrogen atoms contained in thiourea can also provide lone pair electrons to adsorb metal, water and dissolved oxygen are prevented from diffusing inwards after film forming, the metal is protected, thiourea is grafted to chitosan, and the metal is protected. According to the present invention, the active adsorption center of the chitosan is increased, the graphene is grafted to the chitosan so as to avoid agglomeration, and after the graphene is compounded with the matrix polyurethane, the graphene can uniformly cover the metal substrate to form the compact protective film coating, such that the obtained coating material has excellent metal corrosion resistance.

The invention discloses a podophyllotoxin triazole ether derivative as well as a preparation method and application thereof, belongs to the technical field of chemical pharmacy, and particularly relates to a podophyllotoxin triazole derivative and application of the podophyllotoxin triazole ether derivative in preparation of antitumor drugs. A series of novel 1, 2, 3-triazole podophyllotoxin derivatives are designed and synthesized by combining a triazole structure with a podophyllotoxin matrix through click chemistry reaction, the dynamic characteristics of podophyllotoxin are optimized by introducing the triazole structure, and the anti-cancer effect and druggability of podophyllotoxin are improved. Molecular docking shows that the series of compounds have relatively strong binding energy to AKT1 and tubulin and can inhibit tubulin / AKT1 in a targeted manner, and in-vitro anti-tumor activity research shows that the molecules have very strong inhibitory activity to proliferation of human colon cancer cell strains, and a new strategy can be provided for structural derivatization of podophyllotoxin. # imgabs0 #

The invention relates to a preparation method of an oil-proofing agent based on polymerization of acrylic acid and organic silicon, and belongs to the technical field of polymer synthesis. The preparation method comprises the following steps: adding methyl acrylate, hydroxyethyl acrylate, dithiothreitol, m-trifluoromethylcinnamyl aldehyde and triethylamine into a reaction kettle, and stirring and heating to react; adding an initiator, and continuously reacting, so that the acrylic monomer is subjected to polymerization reaction to form a polymer with good stability and mobility; alpha, omega-dihydroxy polydimethylsiloxane is continuously added, the reaction is continued, and the organosilicon linear body and the polymer are subjected to a polymerization reaction; adding an emulsifier, stirring, mixing and reacting to obtain an oil-proofing agent; the oil-proof agent is added into the lunch box paper pulp and is uniformly stirred, so that the polymer is uniformly distributed on the surface of the lunch box paper pulp to form a compact oil-proof film, and the attachment of oil stains is effectively prevented; the oil-proof agent prepared by the invention has good oil-proof performance, can effectively prevent oil stain adhesion, and keeps food packages and tableware clean.

The invention relates to the technical field of ultrafiltration membranes, in particular to an SPDA modified MIL-101 modified polyether sulfone ultrafiltration membrane as well as a preparation method and application thereof. According to the invention, on the basis of a Michael addition reaction, MIL-101 nanoparticles are subjected to sulfonated dopamine modification, and the hydrophilic polyether sulfone (PES) membrane is prepared through a blending modification method. Firstly, an SPDA modified MIL-101 nanometer material is synthesized, a PES ultrafiltration membrane is modified through blending, and the filtering performance and the anti-pollution performance of algae cell extracellular organic matter (EOM) are improved. The influence of the SPDA modified MIL-101 nano material on the performance structure of the ultrafiltration membrane under different addition amounts is further analyzed. And pure water flux and pollution flux are used for evaluating the permeation and separation performance of the membrane. The anti-pollution performance of the membrane is evaluated by alternately filtering the EOM solution and the pure water in three cycles, the ratio of reversible pollution to irreversible pollution and the flux recovery rate.

The invention discloses a high-stability lithium ion battery electrolyte which comprises the following raw materials: LiPF6, ethylene carbonate, dimethyl carbonate and an additive. Compared with the traditional electrolyte, the electrolyte prepared by the method provided by the invention has good stability, and can maintain a high battery capacity retention rate after 100 cycles, thereby improving the use performance and durability of the battery.

The invention relates to an alkaline earth metal ion doped titanium-based phosphate composite material as well as a preparation method and application thereof, and belongs to the technical field of sodium ion batteries. The chemical formula of the alkaline earth metal ion doped titanium-based phosphate composite material is KxMyTiOPO4 / C, M is selected from one or more of beryllium, magnesium, calcium, strontium and barium, x is larger than or equal to 0.8 and smaller than or equal to 0.95, y is larger than or equal to 0.001 and smaller than or equal to 0.1, and the values of x and y meet the charge balance of the chemical formula. By doping alkaline earth metal ions, the lattice structure is effectively stabilized, and the exchange of K-Na ions is avoided, so that the cycling stability of the battery is remarkably improved, and the service life of the battery is remarkably prolonged.

The invention relates to the technical field of thermal transfer carbon ribbons, and discloses a high-efficiency thermal transfer carbon ribbon back coating adhesive and a preparation method thereof. Tetrakis(hydroxymethyl)phosphonium chloride, vinyl trichlorosilane and 2,5-bis(trifluoromethyl)terephthalic acid are used as raw materials to synthesize a diene fluorine-containing caged siloxane monomer, and the monomer is polymerized with pentaerythritol tetraacrylate to form a cross-linked organic silicon acrylic copolymer with a hyperbranched cross-linked network structure, which replaces a traditional organic silicon resin mixture. The copolymer is diluted with a single solvent toluene to avoid the use of a multi-component mixed solvent, greatly reduces VOC emissions, and can be recycled. The carbon ribbon back coating adhesive prepared by the invention has good heat resistance and wear resistance, smooth printing, good bonding performance, can enhance heat conduction and lubrication in a printing process, effectively eliminates the risk of static electricity generated in an actual application process, has a good flame retardant effect, and avoids safety hazards.

This invention relates to the field of petrochemical catalytic desulfurization technology, specifically disclosing a high-efficiency desulfurizing agent, its preparation method, and its application in the desulfurization of heavy naphtha. The desulfurizing agent provided by this invention has a "two-level" metal active center. The first level is a cobalt center in biochar, and the second level is a nickel-copper bimetallic center introduced through impregnation on the surface of a composite carrier. The desulfurizing agent provided by this invention has excellent desulfurization effect. Under conditions of 140°C and no hydrogen, it can simultaneously remove inorganic sulfur such as hydrogen sulfide and organic sulfur such as thiols, thioethers, and thiophenes from heavy naphtha obtained by hydrocracking of heavy diesel oil, wax oil, or mixed diesel and wax oil, reducing the total sulfur content from 25-40 μg·g. ‑1 Reduced to 0.2 μg·g ‑1 The following methods can effectively protect bimetallic (multimetallic) reforming catalysts from sulfur poisoning, and the preparation process is green and controllable, making it suitable for large-scale industrial applications.

The application provides a sodium ion battery electrolyte and a sodium ion battery, and relates to the technical field of sodium ion batteries.A sodium ion battery electrolyte comprises a sodium salt, an organic solvent and an additive.The additive is selected from one or more of a thioimide functional additive and a film-forming additive.The sodium ion battery electrolyte provided by the application can inhibit the dissolution of SEI films and CEI films, improve the cycle stability of the sodium ion battery under high pressure, and thus improve the energy density and service life of the sodium ion battery.

The invention discloses a green liquid salt and a production process thereof, and relates to the technical field of liquid salts.The production process comprises the steps that a metal organic framework is taken and added into a Tris-HCl buffer solution, uniform mixing is conducted, dopamine hydrochloride is added, stirring, centrifuging, washing and drying are conducted, and the metal organic framework of a core-shell structure is obtained; the preparation method comprises the following steps: adding sulfonated polysulfone, a core-shell structure metal organic framework and polyvinylpyrrolidone into N-methyl pyrrolidone, stirring until the materials are completely dissolved, and carrying out ultrasonic treatment to obtain a membrane casting solution; taking the membrane casting solution, pouring on a glass plate, and performing blade coating, water bath, phase inversion and soaking to obtain a nanofiltration membrane; taking brine, adding modified charcoal, adsorbing, and performing ultrafiltration through an ultrafiltration membrane to obtain ultrafiltration filtrate; and carrying out nanofiltration on the ultrafiltration filtrate through a nanofiltration membrane to obtain liquid salt. Sulfonic acid groups introduced into the nanofiltration membrane are negatively charged, and the interception rate of the nanofiltration membrane on sulfate ions, calcium ions and magnesium ions is improved through electrostatic interaction and size screening.

The application discloses a primary and secondary fusion complete set of pole-mounted circuit breaker and relates to the technical field of circuit breakers, which comprises an arc-extinguishing chamber, the arc-extinguishing chamber comprises an insulating shell, a movable contact, a fixed contact, a dynamic gas generating unit and a passive magnetic sensing unit. The dynamic gas generating unit comprises a gas generating element, a fixed magnetic element and a flow guiding element. The core of the application is that the passive magnetic sensing unit is configured to drive the dynamic gas generating unit and the flow guiding element to move when the movable contact is opened, and the fluorocarbon gas generated by the decomposition of the gas generating element under the electric arc is guided to the electric arc area in the center of the arc-extinguishing chamber, so that the uniform distribution is formed to realize efficient arc extinguishing. Through the synergistic effect of magnetic control driving, passive gas generation and active flow guiding, the arc extinguishing speed and reliability are significantly improved, and the technical problems that the arc extinguishing effect of the existing pole-mounted circuit breaker is poor and the high integration and high reliability requirements of the primary and secondary fusion equipment cannot be met are effectively solved.

The invention belongs to the technical field of silicon carbide flat membranes, and particularly provides a high-electronegativity silicon carbide flat membrane material and a preparation method thereof. The invention relates to a preparation method of a high-electronegativity silicon carbide flat sheet membrane material, which comprises the following steps: mixing phytic acid and an organic solvent to prepare a precursor solution, impregnating a silicon carbide flat sheet membrane substrate with the precursor solution, carrying out a reaction, and carrying out stage heat treatment. The high-electronegativity silicon carbide flat sheet membrane material prepared by the method has high electronegativity in a wide pH range, the water permeation flux is high, and after multiple humic acid pollution-cleaning cycles, the flux attenuation is less, and the anti-pollution performance is good. When silica sol is added into the precursor solution, the electronegativity of the silicon carbide flat sheet membrane material can be further improved, so that the anti-pollution performance of the high-electronegativity silicon carbide flat sheet membrane material is further improved.

The invention discloses a composite ion exchange membrane and a preparation method thereof, comprising the following steps: S1, preparing a sulfonated polyvinylidene fluoride solution; S2, preparing modified silicon dioxide; S3, preparing a basement membrane; S4, adding the basement membrane in step S3 to a zinc nitrate-hexamethylenetetramine aqueous solution, performing a heating reaction, adding a dimethylimidazole solution after the reaction is completed, performing an etching reaction, washing and drying after the reaction is completed, and obtaining the composite ion exchange membrane. The composite ion exchange membrane has high selectivity and service life, and also has good mechanical strength, acid and alkali resistance and anti-pollution ability, is convenient for industrialization and promotion, and improves the economy of industrial production.

This invention belongs to the field of water softening and sterilization technology, and discloses an ion-selective adsorption electrode, a micro-electric field adsorption system, and their application in water softening and sterilization / algae removal. An ion-selective adsorption electrode comprises polypolycarboxylate ion exchange fibers, activated carbon, a conductive agent, and a binder, wherein the mass percentage of the polypolycarboxylate ion exchange fibers is 5-20%. This invention uses CCEF-modified activated carbon as the cathode, and at the optimal doping level, it effectively removes Ca... 2+ and Mg 2+ The selectivity coefficients were 15.0 and 13.5, respectively, for Ca 2+ The electroadsorption capacity of the electrode is 311 μmol / g, which is much higher than that of the AC electrode. After 50 cycles of stability testing, the Ca... 2+ The electroadsorption capacity remained above 85%, demonstrating good regeneration ability. Activated carbon modified with nano-silver was used as the anode, and under electric field enhancement, the inhibition rates against bacteria and microalgae reached over 99% and 90%, respectively, exhibiting excellent antimicrobial contamination capabilities.

The invention relates to the technical field of electrical insulating materials for power transmission lines, and discloses a low-temperature-toughness durable high-hydrophobicity epoxy resin hybrid insulating material and a preparation method thereof. Comprising 50-100 parts of an epoxy monomer, 5-50 parts of a siloxane-based epoxy monomer, 30-80 parts of a curing agent, 8-20 parts of a polysiloxane modifier, 10-30 parts of a composite filler, 1-10 parts of an acid-base accelerator, 80-160 parts of aluminum hydroxide, 80-120 parts of silicon powder and 5-25 parts of a silane coupling agent. A chemical network structure on a molecular level is designed, a siloxane epoxy monomer with excellent low-temperature mechanical toughness and high hydrophobicity is introduced, a polysiloxane chain segment is subjected to modification treatment and chemically crosslinked with a functional group of a curing agent, the problem of interfacial compatibility is solved, a composite filler capable of improving compatibility is added, and the curing agent is prepared. According to a free radical reaction mechanism, the surface of the formed insulating material is subjected to rapid fluorination treatment, and the epoxy resin-based hybrid insulating material is endowed with mechanical toughness and lasting hydrophobic performance in a low-temperature environment.

This invention relates to the field of thermal printing materials technology, specifically to a thermal film based on modified cellulose and its preparation method. To improve the waterproof and moisture-proof performance of the thermal film, this invention uses tetrafluorophthalic acid, containing a large amount of fluorine, as a raw material to undergo an esterification reaction with 1,3-di(4-hydroxybutyl)-1,1,3,3-tetramethyldisiloxane, thereby generating a hydroxyl-terminated fluorine intermediate containing fluorine and silicon elements. This improves the hydrophobic properties of the protective layer against water vapor and reduces the surface energy of the protective layer, reducing friction with other objects and reducing adhesion between thermal films. Based on this, this invention mixes the hydroxyl-terminated fluorine intermediate with polyether polyol and carboxymethyl cellulose, thereby grafting the polyether polyol and the hydroxyl-terminated fluorine intermediate into the cellulose carbon chain and crosslinking it with isocyanate to form a network crosslinked structure, achieving protection of the thermal imaging layer in the thermal film.

The invention relates to a process for efficiently recovering iron phosphate in a waste lithium battery, which comprises the steps of discharging, positive electrode material separation, heat treatment, acid leaching, electrolysis, dealumination, precipitation and the like, and realizes the efficient recovery and utilization of the waste lithium battery.

The application provides a modified conductive carbon, a slurry, a positive electrode, a battery and a preparation method thereof, the modified conductive carbon, wherein 0.05wt%-0.1wt% of F elements are doped. Compared with unmodified conductive carbon, the modified conductive carbon has an open pore structure. The modified conductive carbon is prepared by fluorination treatment of graphene oxide with sodium 2,2,3,3-tetrafluoropropionate as a fluorine source and phosphoric acid immersion treatment. The application improves the problem of water introduction in the positive electrode slurry, can stabilize the viscosity of the positive electrode slurry in air, and improves the electrical properties such as the resistance, charge and discharge life of the battery, and improves the chemical stability of the positive electrode slurry of the sodium ion battery in air.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

The invention discloses a preparation method of a pyrophosphate-doped sodium vanadium manganese phosphate / carbon composite material with high cycle performance, and the pyrophosphate-doped sodium vanadium manganese phosphate / carbon (Na < 4 + x > VMn (PO4) < 3-x > (P2O7) < x > / C, 0lt; x < = 0.5). The chelating agent generates amorphous carbon in situ at a high temperature, so that the electronic conductivity of the composite material can be remarkably improved. The pyrophosphate radical is introduced to the polyanion site, so that the induction effect of polyanions is enhanced, the ginger-Taylor effect of Mn < 3 + > and the dissolution of Mn in an electrolyte are inhibited, a rapid diffusion channel of sodium ions can be expanded, the diffusion rate of the sodium ions in the active material is remarkably improved, the structural stability of the active material is also improved, and the service life of the active material is prolonged. The advantages endow the pyrophosphate doped vanadium manganese sodium phosphate / carbon composite material with excellent rate capability and cycle performance.

The invention provides a capacitor electrode material and a preparation method and application thereof, and the capacitor electrode material comprises aluminum nitrate, potassium permanganate and activated carbon. According to the invention, aluminum nitrate and potassium permanganate are taken as modifiers, and act on activated carbon through multiple mechanisms such as oxidation, template effect and chemical activation, so that the specific surface area and porosity of the activated carbon are remarkably increased, and the adsorption capacity of the activated carbon to fluorine ions is improved.

This invention provides an absorbent for capturing carbon dioxide and a method for capturing carbon dioxide. By volume percentage, the absorbent comprises 20-60% glycine salt aqueous solution, 10-50% triethylene glycol monomethyl ether, 5-10% ethylene glycol, and the balance being water. This absorbent combines the advantages of glycine salt systems, such as low volatility, non-toxicity, safety, and better antioxidant degradation resistance, while avoiding the risk of solid precipitates forming after absorption by the glycine salt system, which could cause pipeline blockage.