19results about How to "Increase binding energy" patented technology

The invention provides a charcoal-coated lithium ion doped sodium ferric silicate composite material as well as a preparation method and application thereof, and belongs to the technical field of sodium ion batteries. The sodium iron silicate is modified in a lithium ion doping manner, so that the specific discharge capacity of the sodium iron silicate can be effectively improved; the lithium ion doped sodium iron silicate material is subjected to carbon coating by adopting the charcoal, so that the cycle performance of the sodium iron silicate can be effectively improved; according to the invention, lithium ion doping and carbon coating methods are adopted at the same time, so that the electrode material has the characteristics of high conductivity, high specific capacity, excellent cycle stability and the like. Results show that the capacity of the charcoal-coated lithium ion-doped sodium ferric silicate composite material prepared by the invention is retained by 82% after 50 cycles at a voltage window of 1.5-4.5 V and a current density of 0.05 C, and the cycle performance is obviously improved.

The invention discloses a wear-resistant aluminum alloy and a preparation method thereof, and relates to the technical field of aluminum alloys. The intermediate alloy and the aluminum ingot are added at the same time, so that the melting and dissolving time can be prolonged, and high-melting-point elements can be dispersed in molten aluminum; by means of mechanical alloying and rapid sintering, the surface of the aluminum alloy is covered with wear-resistant particles, the wear resistance of the aluminum alloy is improved, meanwhile, the mechanical performance of the aluminum alloy is guaranteed, and metallurgical bonding is formed after subsequent sintering; mechanical alloying can improve the mixing uniformity between the aluminum alloy powder and the wear-resistant particles and the bonding energy between the wear-resistant particles and the aluminum powder; after the wear-resistant layer is prepared, through heat treatment, the form in the alloy can be remarkably refined, and a strengthening phase is dispersed in a matrix; according to the aluminum alloy material produced through the technology, high-quality aluminum alloy can be forged, high strength is achieved, good abrasion resistance is achieved, and the post-treatment time of the aluminum alloy can be saved.

The application discloses a preparation method of a large-bore air-cooled diesel engine piston and specifically comprises the following steps: S1, modeling and dividing regions; S2, gradient printing; and S3, coating addition; and relates to the technical field of diesel engine pistons. The preparation method of the large-bore air-cooled diesel engine piston realizes the synergistic optimization of the overall performance of the piston through gradient printing of the piston, realizes the lightweight of the piston in cooperation with the honeycomb lattice structure, reduces the abrasion amount by using silicon carbide, improves the wear resistance of the top region, forms zirconium tri-aluminum nano precipitated phases by zirconium, refines the grains, forms a composite precipitated phase by using scandium, zirconium and aluminum, improves the high-temperature strength, constructs an efficient heat conduction network by using graphene nanosheets, improves the heat conductivity of the middle region, forms a three-dimensional network by using carbon nanotubes, improves the toughness of the skirt region, and has high interfacial bonding strength by spraying a wear-resistant and corrosion-resistant coating on the surface of the piston, reduces the friction, improves the service life of the piston and effectively reduces the maintenance cost.

The invention discloses a graphene-nickel oxide composite material prepared on the basis of a one-step hydrothermal method and application of the graphene-nickel oxide composite material in preparation of a lithium ion battery, NiO is integrated into a graphene nanostructure, so that a unique thin nanosheet array with a porous conductive channel is generated, and meanwhile, in the composite material, the graphene-nickel oxide composite material has good electrochemical performance. NiO generates controllable aggregation and re-accumulation, which can buffer electrode stress and improve conductivity, graphene is also beneficial to insertion of lithium ions compared with common graphite, and the added graphene not only improves the conductivity, but also can be used as a flexible substrate of NiO to prevent NiO particles from diffusing into electrolyte in the circulation process. In addition, due to the unique layered hollow structure of NiO, the electrode stress can be reduced by controlling the volume change, and the electrochemical reaction kinetics is greatly improved. The cycling stability and the capacity of the lithium ion battery are effectively improved.

Disclosed in the present invention are a method for synthesizing a high-safety positive electrode material by recycling positive electrode leftover materials, and an application. The method comprises: adding an acid and a reducing agent into positive electrode leftover materials for dissolving, carrying out solid-liquid separation to obtain a first filtrate, adding an alkali into the first filtrate to adjust the pH value for reaction for a period of time, so that most of aluminum ions are precipitated, carrying out solid-liquid separation to obtain a second filtrate, carrying out precipitation reaction on the second filtrate to obtain a precursor, mixing the precursor, a lithium salt and a fluorine source, and calcining in an oxygen atmosphere to obtain a high-safety positive electrode material, wherein the fluorine source is PVDF. According to the present invention, a high-performance and high-safety Al and F co-doped positive electrode material is synthesized by recycling waste positive electrode leftover materials; by means of the synergistic effect of A1 and F, the structural stability of the material at a high temperature is improved, structural damage caused by reaction between the positive electrode and the electrolyte at a high temperature is effectively inhibited, the safety is improved, cation mixing is reduced, ion migration kinetics of lithium ion deintercalation and intercalation are enhanced, and excellent electrochemical performance is achieved.

The invention discloses a polyion liquid derived carbon coated metal catalyst as well as preparation and application thereof. The preparation method comprises the following steps: 1, obtaining an activated carbon / AIBN suspension; step 2, obtaining an activated carbon / AIBN suspension loaded with platinum; 3, dissolving 1-ethyl-3-vinyl imidazole nitrate in a mixed solution of ethanol and water, removing oxygen, slowly adding into the platinum-loaded activated carbon / AIBN suspension, stirring and polymerizing for 12-24 hours at 60-70 DEG C under the protection of nitrogen, and performing suction filtration to obtain a polymerized ionic liquid modified activated carbon-loaded platinum catalyst precursor; step 4, drying; and 5, roasting to obtain the polyion liquid derived carbon coated metal catalyst. The invention provides the application of the polyion liquid derived carbon coated metal catalyst in the catalytic hydrogenation reaction of chloronitrobenzene, and the catalyst has excellent activity, selectivity and stability.

The invention relates to the technical field of electrochemical energy storage materials and preparation, and discloses a forestry and agricultural residue-based carbon material and application thereof in a zinc ion battery, the forestry and agricultural residue-based carbon material is prepared by taking forestry and agricultural residues as raw materials through cellulose extraction, three-dimensional skeleton construction through aerogel, high-temperature carbonization, potassium hydroxide activation pore-forming and electrochemical surface modification. The obtained carbon material has a three-dimensional hierarchical connected network structure composed of micropores, mesopores and macropores, and the surface of the carbon material is rich in oxygen-containing zinc-loving sites for inducing uniform deposition of zinc. When being used as a zinc-free negative electrode carrier of a zinc ion battery, the hierarchical pore structure effectively reduces local current density and buffers deposition volume expansion, and surface zinc-loving sites obviously reduce nucleation overpotential. Through cooperative regulation and control of a physical structure and surface chemistry, zinc dendrite growth and hydrogen evolution side reaction are effectively inhibited, coulombic efficiency, long cycle stability and rate capability of the battery are greatly improved, the process is controllable, and the cost is low.

This application discloses a slow-release sweet-flavored tipping paper and its preparation method, including the following steps: selecting a natural sweetener with a binding energy to the sweet-flavored compound not exceeding -5.0 kcal / mol; preparing an aqueous solution of the natural sweetener with a concentration of 0.001 g / L to 0.1 g / L; simultaneously dissolving the sweet-flavored compound in a 5% ethanol solution; uniformly mixing the aqueous solution of the natural sweetener and the ethanol solution of the sweet-flavored compound to obtain solution A; the mass ratio of the natural sweetener to the sweet-flavored compound in solution A is 1:1-5; and applying solution A to the surface of the tipping paper. This application uniformly coats the sweet-flavored compound and the natural sweetener onto the surface of the tipping paper, utilizing the non-volatile nature of the natural sweetener and its adsorption effect on the sweet-flavored compound to delay the release of aroma from the tipping paper and improve cigarette quality.

This invention relates to the field of hydrogen embrittlement resistant workpieces, and provides a workpiece utilizing pores to resist hydrogen embrittlement and its preparation method. The preparation method includes a workpiece forming step: forming the workpiece and making the surface and / or interior of the workpiece have pores that act as hydrogen traps. The surface and / or interior of the workpiece have pores that act as hydrogen traps. The workpiece and its preparation method provided by this invention utilize pores to resist hydrogen embrittlement, by pre-setting pores within the workpiece as hydrogen traps. The pores that exist inside the workpiece beforehand have a higher binding energy with hydrogen, so hydrogen will preferentially diffuse into the internal pores during diffusion, thereby reducing the hydrogen concentration inside the workpiece and effectively alleviating hydrogen embrittlement. It does not require the addition of specific microalloying elements to improve the material's resistance to hydrogen embrittlement, and it does not need to consider the compatibility of the added elements with the material matrix, thus not being limited to one or a few fixed materials, greatly reducing application costs and having broad promotion and application value.

The invention belongs to the technical field of electro-catalysis oxygen evolution coatings, and particularly relates to a nickel-coated graphite doped FeCoNi oxygen evolution electro-catalyst and a preparation method thereof, the preparation method comprises the steps of ball milling powder mixing, surface degreasing, sand blasting roughening and plasma spraying, and a FeCoNi-Ni3C oxygen evolution coating catalyst is prepared. The prepared coating is well combined with a metal substrate, the atmosphere plasma spraying technology enables the coating to be well combined with the substrate, and the structure of the coating is not changed before and after a stability test. Besides, due to the characteristics of the APS technology, the prepared coating contains a certain content of unmelted or semi-melted metal elementary substances of Fe, Co and Ni, and due to the characteristic, metal elements in the coating tend to move towards higher binding energy during electrochemical testing.

The present invention relates to the technical field of calcium fertilizer, and in particular to a slow-release nano calcium fertilizer and a preparation method and application thereof, wherein the slow-release nano calcium fertilizer comprises a core and a slow-release layer coated on the outer surface of the core, wherein the core comprises the following raw materials by mass: 35-40 parts of nano suspended calcium, 10-15 parts of superphosphate, 15-20 parts of urea, 2-5 parts of slow-release agent, and 5-10 parts of sugar alcohol, and the slow-release layer comprises the following raw materials by mass: 20-25 parts of chitosan, 25-35 parts of sodium alginate, 15-20 parts of starch, 5-10 parts of lignin, and 30-35 parts of mineral potassium humate. The core in the fertilizer contains nano-sized calcium, which is more easily adsorbed by the root hairs or root tips of plants, and the slow-release layer can control the release rate of the calcium fertilizer, so that it can reduce the loss and waste of nutrients while meeting the needs of crops.

The invention provides a triazinyl high-temperature CO2 corrosion inhibitor and a preparation method thereof, and belongs to the technical field of corrosion inhibition compositions and corrosion inhibitors. The triazinyl high-temperature CO2 corrosion inhibitor comprises the following components in percentage by weight: 10%-50% of s-triazine derivatives, 3%-16% of C2-C4 alkynol, 4%-10% of C12-C18 alkanoic acid, 0%-15% of a surfactant, 20%-40% of an organic solvent and 0%-40% of water, and the total percentage is 100%. The triazinyl high-temperature CO2 corrosion inhibitor is suitable for resisting CO2 corrosion at the high temperature of 60-120 DEG C, and the s-triazine derivative has a structure as shown in a formula (I): # imgabs0 # formula (1).

The application discloses a kind of zinc dendrite-free deposition carbon fiber negative materials based on Cu-Zn-ZIF-8 and battery and method, belong to the field of flow battery electrode material.The application covers a layer of Cu-Zn-ZIF-8 material on the surface of carbon fiber, to realize the uniform stable deposition of zinc ion, inhibit the generation of zinc dendrite.Cu-Zn-ZIF-8 is grown on the surface of carbon fiber by hydrothermal reaction, because it has higher binding energy between Zn atom, can reduce the nucleation barrier of Zn, promote Zn deposition.The method is simple, stable performance, carbon felt prepared by the method is used as the electrode material of zinc-based flow battery negative electrode, can enhance the mass transfer rate of zinc ion on the electrode surface, can also increase the nucleation site of Zn, significantly improve the deposition uniformity of zinc ion in the reduction process, inhibit the generation of zinc dendrite, widen the current density range of battery work, improve the service life and safety of zinc-based flow battery.

The application discloses a perovskite solar cell containing a double-layer trifluoroacetate modification layer and a preparation method thereof. The perovskite solar cell comprises, from bottom to top, a conductive glass, an electron transport layer, an electron transport layer modification layer, a perovskite layer, a perovskite modification layer, a hole transport layer and an electrode; the electron transport layer modification layer and the perovskite modification layer are one of methylamine trifluoroacetate, formamidine trifluoroacetate, dimethylamine trifluoroacetate, ethylamidine trifluoroacetate, ethylenediamine trifluoroacetate and guanidine trifluoroacetate. The application simultaneously fills and modifies defects of the electron transport layer and the perovskite layer, passivates oxygen defects in the tin oxide and ion vacancies in the perovskite layer through hydrogen bonds and chemical interactions, and solves the problems of the perovskite solar cell, such as many defects in the electron transport layer and the perovskite layer, low efficiency and poor stability.

The invention discloses a 1T-phase molybdenum disulfide-based composite catalytic material as well as a preparation method and application thereof, and relates to a composite catalytic material as well as a preparation method and application thereof. The invention aims to solve the problems that a 1T-phase molybdenum disulfide catalytic material is thermodynamically unstable and can be gradually converted into a 2H phase even at room temperature, the catalytic active sites of 2H-phase molybdenum disulfide are limited, and the catalytic efficiency of the 2H-phase molybdenum disulfide is greatly limited. The 1T-phase molybdenum disulfide-based composite catalytic material is a micro-sphere with a core-shell structure, the diameter of the micro-sphere is 1.5-5.0 microns, a sphere core is a compact sphere composed of nickel disulfide nanosheet-shaped crystals, the diameter of the sphere core is 1.0-4.0 microns, and a sphere shell is a wrinkled fluffy sphere shell composed of thermodynamically stable 1T-phase molybdenum disulfide nanosheets. The method comprises the following steps: 1, preparing a nickel disulfide sphere core; and 2, preparing the 1T-phase molybdenum disulfide-based composite catalytic material. The 1T-phase molybdenum disulfide-based composite catalytic material is used as a positive electrode host, a diaphragm or an interlayer of a lithium-sulfur battery or a sodium-sulfur battery.

The present invention provides a zinc ion battery electrolyte additive and an electrolyte, belonging to the field of new energy materials and electrochemistry. The specific scheme is as follows: the additive includes sodium N,N-dimethylthioformamide propane sulfonate, and its molecular formula is shown in Formula I:

The application discloses a quinoa heptapeptide with a blood sugar lowering effect and application thereof, and belongs to the technical field of bioactive peptides. The amino acid sequence of the quinoa heptapeptide PSDGPGT is Pro-Ser-Asp-Gly-Pro-Gly-Thr. It is verified through animal model experiments that the quinoa heptapeptide can effectively reduce blood sugar level and improve related metabolic indexes. The application further provides a quinoa peptide rich in the peptide segment PSDGPGT. It is verified through animal model experiments that the quinoa peptide has a significant effect on blood sugar reduction, and provides a safe and effective alternative solution for the development of diabetes treatment drugs, and has good market prospects and application potential.

The application aims to provide a ruthenium molybdenum alloy composite defect type molybdenum oxide electrocatalyst, a preparation method and application thereof, and belongs to the technical field of electrocatalysts. The preparation method comprises the following steps: (1) adding a foamed nickel into a molybdenum salt solution, carrying out a hydrothermal reaction to obtain a Mo-O precursor, and then carrying out joule heating on the precursor to obtain a Mo / MoO x precursor; (2) soaking the Mo / MoO x precursor in a ruthenium salt solution to obtain a Ru-Mo-O precursor; and (3) carrying out joule heat pyrolysis on the Ru-Mo-O precursor under a reducing atmosphere, and obtaining the ruthenium molybdenum alloy composite defect type molybdenum oxide electrocatalyst after the pyrolysis is completed. The prepared RuMo / MoO x electrocatalyst has the advantages of uniform size and large specific surface area, and has good catalytic activity and stability, and can be used for electrocatalytic splitting of water to produce hydrogen in a full pH range.

The invention discloses CaCO3 (at) ZnO core-shell structure composite powder which comprises a nano calcium carbonate core body and a zinc oxide shell, and the weight of zinc oxide is 5%-15% of the weight of nano calcium carbonate. The invention also discloses a preparation method of the CaCO3 (at) ZnO core-shell structure composite powder, which comprises the following steps: (1) preparing calcium hydroxide slurry, then introducing mixed gas containing carbon dioxide, and when the pH value of the system is 8.0-9.0, adding soluble zinc salt and soluble carbonate to obtain mixed slurry; (2) removing impurities and water from the mixed slurry to obtain CaCO3 and ZnCO3 powder; and (3) calcining the CaCO3 and ZnCO3 powder to obtain the CaCO3 and ZnCO3 composite material. The CaCO3 (at) ZnO core-shell structure composite powder is good in dispersity, the whiteness is larger than 95, zinc oxide coating is uniform, the content is very low, the composite powder has a good application effect in rubber, and the purposes of low cost, high efficiency and environmental protection are achieved.