9results about How to "Increase binding energy" patented technology

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.

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 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 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 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.