35results about How to "Improve interface properties" patented technology

The invention provides a sulfide solid electrolyte as well as a preparation method and application thereof. The molecular formula of the sulfide solid electrolyte is Li P < 1-b > M S < c > O < d > X < e >, wherein: 5lt; a < lt >; 6; 0 lt; blt; 1; 1.5 1t; clt; ct; 5, 0lt; dlt; 2.5, 4lt; c + dlt; 5, 1lt; lt, lt; 2; m is selected from one or more of Al, Ga, In, Ti, Sc, As, Sb, Bi, V or Nb; x is selected from one or more of Cl, Br or I. According to the sulfide solid electrolyte and the preparation method and application thereof, the stability of the conductivity of the sulfide solid electrolyte can be improved, the air stability is enhanced, the electrolyte / active substance interface property is improved, the service life of an all-solid-state lithium ion battery is prolonged, and the safety of the all-solid-state lithium ion battery is improved.

The invention provides a solid electrolyte membrane and a preparation method and application thereof. The solid electrolyte membrane comprises a binder; the molecular formula of the sulfide solid electrolyte is Li P < 1-b > M S < c > O < d > X < e >; wherein, 5lt; a < lt >; 6, 0lt; blt; 1, 1.5 1t; clt; ct; 5, 0lt; dlt; 2.5, 4lt; c + dlt; 5, 1lt; lt, lt; 2; m is selected from one or more of Al, Ga, In, Ti, Sc, As, Sb, Bi, As, V or Nb; x is selected from one or more of Cl, Br or I; the ionic conductivity of the solid electrolyte membrane is 1 * 10 <-3 > S / cm to 2 * 10 <-2 > S / cm. According to the solid-state electrolyte membrane and the preparation method and application thereof, the stability of the conductivity of the solid-state electrolyte membrane can be improved, the air stability can be enhanced, the electrolyte / active substance interface property can be improved, the service life of an all-solid-state lithium ion battery can be prolonged, and the safety of the all-solid-state lithium ion battery can be improved.

The invention discloses a photovoltaic cell preparation method and a photovoltaic cell. The photovoltaic cell preparation method comprises the following steps: providing a silicon substrate with antireflection films on both sides; metalizing at least one surface of the silicon substrate to obtain a photovoltaic cell; wherein the metallization treatment on at least one surface of the silicon substrate comprises the following steps: providing a substrate, and forming a groove, a photosensitive film layer and / or a mask layer on the substrate; filling mixed slurry in the groove, wherein the mixed slurry comprises conductive slurry and a photosensitizer; or sequentially filling the photosensitizer and the conductive slurry in the groove; and aligning the substrate with the silicon substrate, irradiating one side, far away from the silicon substrate, of the groove by laser, and enabling the conductive slurry to generate a grid line on the silicon substrate to obtain the photovoltaic cell. According to the invention, the interface characteristics between the conductive slurry and the substrate are optimized, so that the energy window of laser transfer printing is easier to control and adjust, and the efficiency and quality of laser transfer printing are improved.

The invention relates to a cadmium telluride solar cell and a preparation method thereof, the cadmium telluride solar cell comprises a TCO layer, a buffer layer, a window layer, a light absorption layer, a back electrode layer and a back contact layer, the back contact layer is located between the light absorption layer and the back electrode layer, and the back contact layer is made of boron or carbon doped transition metal nitride. The back contact layer made of boron or carbon doped transition metal nitride is introduced between the light absorption layer and the back electrode layer, and transition gold elements in the back contact layer can be compatible with the cadmium telluride absorption layer, so that the obstruction of a contact barrier to hole transport is reduced, the interface characteristic between the CdTe absorption layer and the back contact layer is optimized, and the light emitting efficiency is improved. According to the present invention, the cadmium telluride absorption layer can form the good ohmic contact with the cadmium telluride absorption layer, such that the effect of the back field buffer layer can be provided so as to reflect the photo-induced electrons on the back surface in the cadmium telluride to the PN junction, such that the recombination of the electrons on the back surface can be substantially reduced, and the carrier collection efficiency of the cell can be improved so as to improve the open-circuit voltage and the conversion efficiency of the cell;

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 copper-aluminum hydrotalcite modified zinc negative electrode and a preparation method and application thereof, and belongs to the technical field of electrodes. The preparation method comprises the following steps: S1, adding copper salt and aluminum salt into water, stirring and dissolving, adding alkali liquor, stirring and reacting, centrifugally washing, crystallizing and drying to obtain copper-aluminum hydrotalcite; and S2, adding the copper-aluminum hydrotalcite into a binder for continuous grinding, then adding N-methyl pyrrolidone for grinding and mixing, paving a zinc foil, removing a surface oxide layer, uniformly coating the zinc foil with the copper-aluminum hydrotalcite slurry by using a coater, drying, and cutting to obtain the electrode plate. The interface property between the electrolyte and the negative electrode is optimized by synthesizing the copper-aluminum hydrotalcite material, the deposition process of zinc ions is effectively regulated and controlled, deposition of the zinc ions on the surface of the negative electrode is more uniform and stable, the dendritic crystal growth problem possibly occurring in the charging and discharging process of the zinc negative electrode is effectively prevented, and the service life of the zinc negative electrode is prolonged. Battery short circuit and failure risks caused by dendritic crystal growth are reduced, so that the safety and the cycle life of the battery are improved.

The invention provides a sulfide solid electrolyte as well as a preparation method and application thereof. The molecular formula of the sulfide solid electrolyte is LifP1-gEgSwOgQz, wherein, 5lt; flt; 10; 0 lt; glt; 1, 3lt; wlt; 6, 4lt; w + glt; 6, 0lt; zlt, zlt; 2; e is selected from one or more of Mg, Ca, Sr, Ba, Zn, Cr, Sn or Pb; q is selected from one or more of Cl, Br or I. According to the sulfide solid electrolyte and the preparation method and application thereof, the stability of the conductivity of the sulfide solid electrolyte can be improved, the air stability can be enhanced, the electrolyte / active substance interface property can be improved, the service life of an all-solid-state lithium ion battery can be prolonged, and the safety of the all-solid-state lithium ion battery can be improved.

The invention discloses a low-indium-content transparent electrode-containing semitransparent perovskite solar cell and a preparation method thereof, the transparent electrode of the existing semitransparent perovskite cell is optimally designed, and the traditional indium tin oxide transparent conductive film is completely or partially replaced in the first transparent electrode and / or the second transparent electrode; the problems that indium resources are scarce and the price is high are solved. According to the invention, the design of the transparent electrode with a single-layer, double-layer or three-layer structure is adopted, and a proper interface contact layer material is combined, so that the transparent electrode has high conductivity, low In content and excellent interface characteristics, and high efficiency, low cost and high damp-heat stability of the semitransparent perovskite cell are realized.

The invention relates to a method for improving the protein solubility of walnut meal by combining ultrasonic-assisted restrictive enzymolysis with glycosylation modification, which comprises the following steps: degreasing walnut meal to obtain walnut degreased powder; the method comprises the following steps: dissolving walnut defatted powder by using deionized water, treating the walnut defatted powder by using double-frequency ultrasonic waves, magnetically stirring, centrifuging, taking supernatant, stirring, centrifuging, taking precipitate, and carrying out vacuum freeze drying to obtain walnut meal protein; carrying out restrictive enzymolysis on the walnut meal protein by using trypsin, and inactivating protease contained in enzymatic hydrolysate after enzymolysis; and adding the inactivated enzymatic hydrolysate into maltodextrin for a glycosylation reaction, after the glycosylation reaction, collecting a solution, freeze-drying to obtain a glycoprotein conjugate, and storing under a drying condition. According to the method disclosed by the invention, ultrasonic-assisted restrictive enzymolysis is combined with glycosylation modification to improve the protein solubility of the walnut meal, so that the reaction steps can be optimized, the reaction time is saved, the protein solubility is greatly improved, and the deep processing and comprehensive utilization of the walnut industry are further promoted.

The invention provides a high-k gate dielectric composite material, a preparation method thereof and a beta-Ga2O3 MOS (Metal Oxide Semiconductor) power device. The composite material comprises a beta-Ga2O3 substrate; the SiO2 interface buffer layer is formed on at least one surface of the beta-Ga2O3 substrate; the Al2O3 transition layer is formed on the surface of the SiO2 interface buffer layer; the AlON interface layer is formed on the surface of the Al2O3 transition layer; and the HfO2 high-k main dielectric layer is formed on the surface of the AlON interface layer. Experimental results show that the composite material provided by the invention has a dielectric constant of 15-30, a forbidden bandwidth of greater than 5eV, an interface state density of less than 1 * 10 < 12 > cm <-2 > eV <-1 > and a breakdown field strength of 7MV / cm-15MV / cm, can effectively improve the interface characteristics of a beta-Ga2O3 MOS power device when being used for the beta-Ga2O3 MOS power device, improves the reliability of a gate medium, and is suitable for being applied to high-voltage and high-temperature power devices.

The present invention discloses a thermal battery positive electrode material based on anion substitution and a preparation method thereof, wherein the thermal battery positive electrode material based on anion substitution comprises: a positive electrode material matrix and an interface modification layer attached to the surface of the positive electrode material matrix; the interface modification layer is prepared by replacing part of the anions in the surface layer of the positive electrode material with anions of different types. The present invention heat-treats the thermal battery positive electrode material in an atmosphere or solution containing anion components, so that part of the anions in the surface layer of the positive electrode material are replaced by anions of another type, thereby changing the electronic structure of the surface layer of the positive electrode material by introducing defects, improving the interface characteristics between the positive electrode material and the electrolyte, accelerating the surface interface electron-ion exchange transfer process, thereby reducing the polarization impedance, so that when the high-performance positive electrode material is applied to thermal battery products, the performance of the battery is greatly improved, and has a wide range of application prospects.

The invention relates to the technical field of perovskite photovoltaic cells, in particular to a method for preparing a perovskite layer through a two-step coating method, the perovskite layer and a photovoltaic module. The method for preparing the perovskite layer by the two-step coating method comprises the following steps: S1, providing an aerogel template; s2, preparing a precursor solution; s3, preparing an aerogel-precursor solution; s4, preparing a precursor film; s5, carrying out first annealing treatment to prepare a lead iodide film; and S6, preparing the perovskite layer. According to the method for preparing the perovskite layer through the two-step coating method, the perovskite layer and the photovoltaic module, the problems of poor crystallinity and uniformity of the perovskite layer prepared through the two-step method in the related technology are solved.

The invention discloses a gel type lithium ion battery, which comprises a positive plate, a negative plate and a gel electrolyte, in the gel type lithium ion battery, the liquid injection amount of a precursor electrolyte per Ah is recorded as a, the distance of the edge of at least one side edge of a negative electrode active material layer exceeding the edge of a positive electrode active material layer is recorded as b, and a and b satisfy 0.3 < = a * b < = 15. According to the present invention, the overhang area interface characteristic is improved by regulating and controlling the distance of the negative plate exceeding the edge of the positive plate and the injection amount of the gel electrolyte precursor electrolyte, the lithium precipitation or swelling risk of the overhang area is reduced, the safety of the battery is improved, and the gel type lithium ion battery has high energy density.

The present application relates to a kind of vertical channel field effect transistor and its preparation method, belong to semiconductor device technical field.It includes: silicon oxide substrate, its one side is provided with high platform;Wherein, high platform each side is provided with multilayer film structure;First guide groove on the first side of multilayer film structure and first guide groove on the second side of adjacent multilayer film structure are communicated;First guide groove is perpendicular to silicon oxide substrate;Multiple first dielectric layer, is set to the surface of silicon oxide substrate;Wherein, first dielectric layer both sides are provided with second guide groove;Second guide groove is communicated with the nearest first guide groove;First guide groove and second guide groove are provided with nanowire;Source electrode, is set to the side of high platform away from silicon oxide substrate;Multiple gate electrode, each gate electrode is set to the third side of each multilayer film structure, and is connected with dielectric layer.The present application realizes single nanowire high-density multi-independent channel, improves structure utilization.

This invention relates to the field of lubricant technology, specifically to a lubricant for agricultural machinery and its preparation method. This agricultural machinery lubricant, by weight, comprises the following components: 85-93 parts of a first base oil, 2.0-3.0 parts of 1,3-bis(3-phenoxyphenoxy)benzene, 0.2-0.3 parts of zinc dialkyl dithiophosphate, 0.5-1.0 parts of a graphene-based anti-wear additive, 2.0-4.0 parts of polyisobutylene succinimide, 0.5-1.5 parts of a hindered phenolic antioxidant, 1.5-3.0 parts of hydrogenated styrene-isoprene copolymer, and 0.2-0.6 parts of polymethacrylate; wherein the first base oil comprises poly(α-olefin) PAO4 and paraffin oil in a weight ratio of 2-3:1. The agricultural machinery lubricant provided by this invention improves the anti-wear and friction-reducing properties of the graphene-based anti-wear additive, and enhances the stable dispersibility of functionalized graphene in the oil phase and its interfacial properties with the oil phase.

The invention relates to the technical field of semiconductors, and provides a light-emitting diode, a preparation method thereof and a communication system. The light emitting diode comprises a substrate, a first semiconductor layer, an active layer and a second semiconductor layer which are stacked in sequence. The active layer comprises at least one group of quantum well layers and quantum barrier layers which are periodically and alternately stacked; the quantum well layer comprises an In component; the active layer further comprises at least one covering layer; the covering layer is located between the quantum well layer and the quantum barrier layer; the material of the covering layer is selected from a III-V group nitride semiconductor material, and the bond energy of a chemical bond formed by a metal element contained in the III-V group nitride semiconductor material and a nitrogen element is higher than the bond energy of In-N formed by an indium element and the nitrogen element in the quantum well layer. Through the above arrangement, mutual diffusion of In atoms in the quantum well containing the In component is effectively inhibited, a clear interface of the quantum well layer is maintained, and high-speed LED communication is further realized.

The invention discloses a method for separating rare earth and fluoroaluminum in a high-fluoroaluminum and low-rare-earth-content material, and belongs to the field of rare earth hydrometallurgy. Aiming at the technical problems of poor selectivity and easiness in emulsification when the materials are treated by an existing single extraction system, a five-component synergistic extraction system is adopted, a mixed extraction agent is prepared according to the volume ratio of P204: P507: TBP: sec-octanol: diluent, and after hydrochloric acid pretreatment and ammonia water saponification, three-stage to six-stage counter-current extraction is carried out on the mixed extraction agent and the pretreated material liquid subjected to pH regulation. Rare earth is selectively extracted into an organic phase, fluorine and aluminum are enriched in raffinate, and efficient separation is achieved. And the rare earth-loaded organic phase is subjected to reverse extraction with high-concentration hydrochloric acid to obtain a concentrated rare earth solution, and trace rare earth in raffinate can be recovered through oxalic acid precipitation. Through the synergistic effect of specific components, the separation selectivity is remarkably improved, extraction emulsification is effectively avoided, stable operation of the process is guaranteed, and the method is particularly suitable for efficient treatment of complex high-fluorine-aluminum low-rare-earth materials.

The invention relates to the field of water-based MLCC ceramic slurry tape casting process, in particular to a release coating agent, a release film and application thereof.The release coating agent comprises a polymer with hydrophilic groups and a cross-linking curing agent, the polymer at least comprises one hydrophilic group of amino, hydroxyl and hydroxymethyl, and the cross-linking curing agent is a cross-linking curing agent. The release coating agent can be coated and cured on the surface of the base material layer to form a release layer of a release film, so that the water-based MLCC ceramic slurry can better wet the surface of the release layer, the interaction force between the slurry and the release layer is enhanced, and the interfacial property between the release layer and the slurry is optimized so as to achieve the optimal stripping performance and slurry forming quality; and the water contact angle on the surface of the release layer can be controlled to be 80-96 degrees by adjusting the molar ratio of different hydrophilic groups in the release coating agent so as to adapt to the casting process of different water-based MLCC ceramic slurry.

The invention provides a sulfide solid-state electrolyte and a preparation method and application thereof. The sulfide solid-state electrolyte comprises a sulfide solid-state electrolyte inner core and a sulfide solid-state electrolyte outer core, and the hydrophobic layer is uniformly coated on the sulfide solid electrolyte core, and the hydrophobic layer comprises bis-hexadecyl phosphate. According to the sulfide solid-state electrolyte and the preparation method and application thereof, the air stability of the sulfide solid-state electrolyte can be remarkably improved, generation of toxic gas is reduced, the ionic conductivity of the sulfide solid-state electrolyte is not greatly reduced, the cycle performance of an all-solid-state lithium ion battery is improved, the manufacturing process is simple, and the cost is low. And the cost is low.

This application relates to the field of in-memory computing memory technology, and more particularly to a three-dimensional ferroelectric memory with an IGZO channel and its fabrication method. The three-dimensional ferroelectric memory with an IGZO channel includes: a bottom global gate line; a center select gate extending vertically relative to the bottom global gate line; a semiconductor stack structure including a gate metal layer, a ferroelectric layer, a gate oxide layer, and an IGZO channel sequentially surrounding the center select gate; a drain and a source extending horizontally relative to the center select gate into the semiconductor stack structure and contacting the ferroelectric layer; and multiple pairs of drains and sources spaced apart along the extension direction of the center select gate to form multiple ferroelectric memory transistor cells. The three-dimensional ferroelectric memory with an IGZO channel of this application improves the durability and reliability of non-volatile memory devices.

The invention provides a semiconductor structure and a preparation method of the semiconductor structure. The semiconductor structure comprises a substrate, an epitaxial layer, a trench gate structure, a doping structure, a source electrode structure and a drain electrode structure, wherein the epitaxial layer is located at one side of the substrate; the trench gate structure is located in the epitaxial layer; the doping structure is located in the epitaxial layer, at least part of the doping structure is located between the groove gate structure and the substrate, and the doping concentration of the doping structure is firstly increased and then decreased in the direction that the substrate points to the epitaxial layer; the source structure is located at one side of the epitaxial layer away from the substrate; the drain structure is located on one side of the substrate away from the epitaxial layer. The performance of the semiconductor structure can be improved by arranging the doping structure with the variable doping concentration.

This invention proposes an all-solid-state lithium-ion battery and its application. The all-solid-state lithium-ion battery includes: a positive electrode; a modified lithium-based composite negative electrode, the modifying material including metal fluorides; and a solid electrolyte membrane disposed between the positive electrode and the modified lithium-based composite negative electrode, wherein the solid electrolyte membrane includes a sulfide electrolyte with the chemical formula Li. a P 1‑b M b S c O d X e , of which 5

The invention relates to the technical field of photoelectric detection, in particular to a graphene-hafnium oxide interface layer-germanium heterojunction photoelectric detector and a preparation method thereof, and the method comprises the following steps: cleaning a germanium sheet; sputtering a hafnium oxide thin film on the surface of the pretreated germanium sheet by adopting a vacuum thin film sputtering mode; growing an insulating layer and a positive electrode on the hafnium oxide interface layer of the preliminary product in a sputtering manner; turning over the secondary product, and sputtering a back electrode on the back surface of the secondary product; transferring single-layer graphene to a positive electrode of a tertiary product by using an electrochemical bubbling method; and performing annealing treatment to obtain the graphene-hafnium oxide interface layer-germanium heterojunction photoelectric detector. The graphene / germanium heterojunction photoelectric detector introduced with the hafnium oxide interface layer shows good feasibility in theory and experiment, the performance of the photoelectric detector is remarkably improved, and the graphene / germanium heterojunction photoelectric detector particularly has remarkable beneficial effects in the aspects of reducing dark current, improving the signal-to-noise ratio, enhancing the detection sensitivity and the like.

The application discloses a silicon-carbon composite material and a preparation method and application thereof, and belongs to the field of electrochemical energy storage. The silicon-carbon composite material comprises a silicon-based active substance and a low-crystallization carbon matrix, the low-crystallization carbon matrix coats and / or disperses the silicon-based active substance; and the Raman spectrum ID / IG value of the low-crystallization carbon matrix is greater than 1.2. The low-crystallization carbon matrix has high disorder degree and toughness, can better adapt to the volume expansion and shrinkage of silicon in the charging and discharging process, maintains the integrity of the electrode structure, and thus significantly improves the cycle stability; the low-crystallization carbon surface contains more defects and functional groups, which is helpful to form a stable and dense SEI film, reduces the side reaction in the cycle process and the irreversible consumption of active lithium.

The invention relates to the technical field of photovoltaics, and discloses a passivation contact solar cell and a preparation method thereof. The preparation method comprises the following steps: providing a substrate layer with a first surface and a second surface which are opposite; forming an oxide layer on the first surface of the substrate layer; performing laser sintering treatment on the surface of the oxide layer; forming a first doping layer on the oxide layer after laser sintering treatment; forming a second doping layer on the second surface of the substrate layer; and forming a first electrode connected with the first doping layer on one side of the first surface of the substrate layer, and forming a second electrode connected with the second doping layer on one side of the second surface of the substrate layer. According to the invention, the laser sintering treatment is carried out on the oxide layer to realize accurate optimization of the surface of the oxide layer and improve the surface and interface characteristics, so that the surface recombination rate of the oxide layer and the substrate layer and the first doping layer is reduced, the service life of a carrier is prolonged, the photoelectric conversion efficiency and stability of the cell are improved, and the power generation efficiency is improved.

The application provides a battery cell, which comprises a positive electrode sheet, a separator and a negative electrode sheet; the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer; the positive electrode active material layer comprises a positive electrode active material, the positive electrode active material comprises lithium cobaltate, the particle size of the lithium cobaltate is d1, the unit is mu m, and the value range of d1 is 0 mu m < d1 <= 2 mu m; the negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector; the thickness of the negative electrode current collector is 7 mu m-11 mu m; the negative electrode active material layer comprises a second binder, and the second binder comprises a CMC compound; by introducing lithium cobaltate particles with a particle size of 0-2 mu m into the positive electrode sheet, adopting a negative electrode current collector with a thickness of 7 mu m-11 mu m, and simultaneously adopting a CMC compound in the negative electrode active material layer, the direct current resistance of the battery can be small, the heat generation in the cycle process can be reduced, the by-products caused by temperature rise can be relatively reduced, and the long cycle performance of the battery cell can be ensured.

The invention discloses a lithium ion battery positive electrode hyperdispersant as well as a preparation method and application thereof, and belongs to the technical field of new materials. The hyperdispersant comprises the following raw materials in parts by mass: 50-80 parts of a solvent, 10-20 parts of a first component, 5-15 parts of a second component, 1-10 parts of micromolecular amino acid and 1-5 parts of an interface modifier, the first component contains at least one phosphorus-containing ester organic matter; the second component contains at least one benzene ring and an organic matter with an ether bond; the interface modifier is a silane coupling agent. The addition amount of the hyperdispersant is less than 0.2%, so that the viscosity of the slurry can be effectively reduced, the fluidity can be improved, the dispersion uniformity of the slurry can be improved, and the overall performance of the battery can be improved.

The invention discloses a preparation method of a lithium ion battery electrolyte with efficient conductivity, and relates to the technical field of lithium ion battery electrolytes.The preparation method of the lithium ion battery electrolyte comprises the steps that S1, ionic liquid is prepared and then mixed with a carbonic ester solvent; s2, preparing a gradient electrolyte structure; s3, preparing a bio-based additive; s4, carrying out photo-initiation polymerization reaction to form a polymer network structure; s5, constructing a multi-scale pore channel structure by using a template method; step S6, carrying out filtering treatment on the prepared electrolyte; and S7, carrying out performance test and optimization on the electrolyte. According to the invention, the ionic liquid with asymmetric cations and functionalized anions is prepared and mixed with the carbonic ester solvent to form an ionic liquid synergistic system, so that the problems of poor conductivity of the electrolyte, non-ideal solvation of lithium ions, poor electrochemical stability, limited energy density of the battery and short cycle life of the battery can be solved.

The present invention discloses a high-elasticity and high-toughness low-frequency radar absorbing material and a preparation method thereof, belonging to the technical field of radar stealth materials. The present invention is compounded by two-component polyurethane, a sheet-shaped microwave absorbent filler treated with amino alcohol surface, an organic dispersant, a defoamer, a softener and a diluent. The two-component polyurethane accounts for 19% to 45% of the mass of the absorbing coating, and the microwave absorbent filler is a sheet-shaped composite ferromagnetic material containing iron, cobalt and nickel, which is prepared after the surface is coated with amino alcohol, accounting for 54% to 80% of the mass of the coating. The mass fraction of the organic dispersant, the defoamer and the softener in the coating is 0.1% to 10%. The remainder is a diluent. The preparation steps of the present invention are: dissolving and diluting the two-component polyurethane with a diluent, and then adding a microwave absorbent filler, an organic dispersant, a defoamer and a softener to compound. The preparation method of the present invention can improve the toughness and elasticity of the low-frequency radar absorbing coating, and at the same time has excellent construction performance.

The present invention discloses a lithium-ion battery positive electrode hyperdispersant and a preparation method and application thereof, belonging to the field of new material technology. The raw materials of the hyperdispersant of the present invention are composed of the following according to mass fractions: 50-80 parts of solvent, 10-20 parts of a first component, 5-15 parts of a second component, 1-10 parts of a small molecule amino acid, and 1-5 parts of an interface modifier; the first component contains at least one phosphorus-containing ester organic matter; the second component contains at least one benzene ring and an organic matter with an ether bond; the interface modifier is a silane coupling agent. The hyperdispersant of the present invention can effectively reduce the slurry viscosity, improve fluidity, and increase the slurry dispersion uniformity by adding less than 0.2%, thereby improving the overall performance of the battery.