38results about How to "Increase migration rate" patented technology

The invention discloses a Co3O4-Cu2-xS composite photo-thermal catalyst as well as a preparation method and application thereof. The composite photo-thermal catalyst is prepared by taking a surfactant as a bridge and compounding Co3O4 and Cu2-xS. The composite photo-thermal catalyst has a reduced band gap width, can effectively promote migration and separation of photon-generated carriers, enhances the absorption efficiency of visible light-near infrared light, and shows excellent photo-thermal conversion performance. The composite photo-thermal catalyst can be used for constructing a Co3O4-Cu2-xS + PMS + NIR catalytic system, and peroxymonosulfate is activated under the irradiation of near-infrared light so as to degrade antibiotics in water. Experiments prove that the Co3O4-Cu2-xS + PMS + NIR system disclosed by the invention can achieve the degradation rate of 99% on levofloxacin within 20 minutes, and the generation efficiency of active species is remarkably improved through the synergistic effect of a photothermal effect and interface activation. The catalyst has broad-spectrum degradation activity on various antibiotics, keeps efficient and stable catalytic performance in a wide pH range, and shows excellent ion interference resistance and adaptability to various water bodies.

The application relates to the technical field of organic light-emitting display, and discloses a cyano-substituted aryl ring-connected triazine compound and application thereof. The cyano-substituted aryl ring-connected triazine compound has a structure as shown in formula (I), the compound provided by the application has high bond energy between atoms, good thermal stability, is conducive to solid-state stacking between molecules, is conducive to injection and migration of excitons, can effectively reduce the driving voltage of an organic electroluminescent device when used as an electron transport material, improves the light-emitting efficiency of the organic electroluminescent device, and prolongs the service life of the organic electroluminescent device. Meanwhile, the cyano substitution can adjust the energy level of the compound, the HOMO and LUMO energy levels are deepened, the compound is more matched with adjacent layers, and the device voltage is reduced. The application further provides an organic electroluminescent device and a display device containing the compound of formula (I).

The invention provides a pole piece of a lithium ion battery and a preparation method of the pole piece, the pole piece of the lithium ion battery comprises a current collector and an active material coated on the current collector, and by arranging the active material and an adhesive, the active material can be conveniently and rapidly fixed when being extruded and arranged on the current collector along an angle; the assembly state of the active material on the current collector is stabilized, the active material is placed in the slit die cavity to be extruded, the active material moves and deforms towards the single side direction, so that the structure becomes long and narrow, and the end part of the long and narrow active material is connected with the current collector to be rolled, so that the tortuosity of the lithium ion battery pole piece is reduced, and the service life of the lithium ion battery pole piece is prolonged. And the migration rate of lithium ions in the pole piece and the embedding rate of the lithium ions in the active material are accelerated, meanwhile, the problem that the pole piece is expanded and increased due to lithium ion embedding in the thickness direction of the pole piece is solved, and the probability of deformation of the lithium ion battery is reduced.

This invention discloses a method for removing micro-water from polar lubricating oil based on the synergy of electric field polarization and crystal field. The method includes: first, filtering the polar lubricating oil containing trace amounts of water to remove mechanical impurities, then heating it to 25℃~35℃; then introducing it into an electric field polarization unit, where it is polarized using an electric field until the dielectric constant of the lubricating oil increases by 3%~8% relative to its initial value; next, introducing it into a crystal field unit, where it is stirred and mixed to fully contact an inorganic crystalline particle adsorbent with a superhydrophilic surface, using the adsorbent to remove water from the oil; finally, passing it through a fine filtration unit to remove the water-swollen inorganic crystalline particle adsorbent, thus completing the micro-water removal of the polar lubricating oil. This invention achieves efficient and deep dehydration of polar lubricating oil at room temperature, with advantages such as low energy consumption, low cost, no additive loss, and no impact on oil performance.

The embodiment of the application provides a kind of propane ammoxidation preparation acrylonitrile, it is related to acrylonitrile generation technical field;The method comprises: propane, ammonia and oxygen are mixed, and mixed gas is obtained;The mixed gas occurs ammoxidation under the action of metal oxide composite catalyst, and acrylonitrile is obtained;The metal oxide composite catalyst includes Mo-V base metal oxide, and also includes alkali metal or alkaline earth metal.The method of the present application has relatively mild reaction conditions, the yield can basically reach more than 60%, the selectivity can reach more than 80%, improves the raw material utilization rate, reduces energy consumption and equipment investment, thereby effectively reducing the production cost of acrylonitrile.At the same time, the process of the present application can effectively control the side reaction in the reaction process, reduce the generation of by-products, and reduce the difficulty of subsequent separation and purification of reaction products.

The invention belongs to the technical field of solid waste recycling. The invention discloses a method for realizing high-value recycling of secondary aluminum ash and synchronous deep defluorination and dechlorination by utilizing hydrothermal synthesis. The method comprises the following steps: firstly, pretreating secondary aluminum ash, then preparing the pretreated secondary aluminum ash and water into slurry, and adding a specific defluorinating agent and a dechlorinating agent into the slurry to construct a synchronous reaction system; the system is subjected to hydrothermal reaction under high-temperature and high-pressure conditions, so that fluorine and chlorine elements are respectively fixed and converted into stable compounds. Solid-liquid separation is carried out after the reaction is completed, an obtained solid product can be used as a raw material for preparing a zeolite molecular sieve or an aluminum-based material, and salt is recovered from a liquid part through evaporative crystallization. According to the method, deep removal of harmful elements and a high-value recycling process of beneficial components are coupled to a single hydrothermal system, and efficient harmless and high-value recycling utilization of the secondary aluminum ash is achieved.

The application provides a compound of formula (I), the bond energy between atoms is high, the compound has good thermal stability, and the solid-state stacking between molecules is favorable, and the energy level between adjacent layers is suitable, which is favorable for the injection and migration of excitons. When used as an electron transport material, the compound can effectively reduce the driving voltage of an organic electroluminescent device, improve the light-emitting efficiency of the organic electroluminescent device, and prolong the service life of the organic electroluminescent device. The application also provides an organic electroluminescent device and a display device comprising the compound of formula (I).

This invention belongs to the field of microencapsulation technology, and specifically relates to a high-lasting fragrance microcapsule and its preparation method. The preparation method of the high-lasting fragrance microcapsule provided by this invention includes the following steps: S101, mixing fragrance with hydrophilic particles and ultrasonically dispersing to obtain an oil phase; S102, mixing styrene-maleic anhydride copolymer, a strong acid-resistant anionic emulsifier, and a nonionic emulsifier, adjusting the pH, and stirring evenly to obtain an aqueous phase; S103, mixing melamine, formaldehyde, water, modifier A, and modifier B, heating and stirring, adjusting the pH, and cooling after the reaction to obtain a modified MF prepolymer; S104, adding the oil phase to the aqueous phase for emulsification to obtain an emulsion; S105, adding the modified MF prepolymer to the emulsion for crosslinking, adjusting the pH for curing, and then adding polyvinyl alcohol polymers and glutaraldehyde for secondary encapsulation to obtain the high-lasting fragrance microcapsule. The fragrance microcapsules prepared by this invention achieve a long-lasting fragrance effect and excellent wash resistance.

The application belongs to the technical field of iodine-containing wastewater treatment, and specifically provides a method for treating iodine-containing wastewater, which comprises the following steps: mixing a metal-doped bismuth tungstate material for treating iodine-containing wastewater with a binder and a conductive agent to prepare a slurry, coating the slurry on a conductive substrate, and drying to obtain a membrane electrode, and using the obtained membrane electrode to treat iodine-containing wastewater; and a preparation method of the metal-doped bismuth tungstate material for treating iodine-containing wastewater, which comprises the following steps: 1) dissolving bismuth salt and iron salt in a solvent to prepare a mixed solution; 2) adding a tungstate solution to the mixed solution to form a suspension, and then performing a hydrothermal reaction, collecting the precipitate after cooling, and washing and drying to obtain the product. The metal-doped bismuth tungstate material prepared by the application has the advantages of high specific surface area and good photo-assisted electric adsorption performance.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

This invention relates to the field of lithium battery technology, and in particular to a method for preparing a lithium-ion battery cell. The invention discloses a method for preparing a lithium-ion battery cell, comprising: first, preparing a positive electrode slurry containing modified titanium aluminum carbide, graphene oxide, etc., and a negative electrode slurry containing aminated carbon nanotubes, zinc aluminum spinel, etc., both processed according to specific proportions and processes; second, coating the positive and negative electrode slurries separately onto a current collector, and obtaining positive and negative electrode sheets through drying, coating with a coating agent, etc.; next, preparing a composite separator coated with a separator coating agent and curing it; finally, winding the separator in a positive-separator-negative-separator sequence, and obtaining a lithium-ion battery cell through drying, encapsulation, electrolyte injection, formation, etc.

A high-capacity, dense anode material and its preparation method are disclosed. The preparation includes: mixing graphite micropowder with a first forming agent, such as asphalt, and a second additive, such as ammonium dihydrogen carbonate, to form a mixture; pressing the mixture into a blank; heat-treating the blank under a protective atmosphere to form a sinter; pulverizing the sinter into powder; mixing the powder with a third coating agent, such as phenolic resin, to form a homogenized material; and carbonizing the homogenized material to form, for example, a lithium-ion battery anode material. The anode material prepared by this invention can effectively shorten the migration distance during lithium-ion diffusion, greatly improve the rate performance of the material, effectively reduce defects on the surface and in the bulk of the graphite anode, ensure the formation of a smooth and stable specific surface area, further ensure the stable formation of the SEI film and structural stability during cycling, and effectively guarantee the material's high initial efficiency, high capacity, and long cycle performance.

The present application belongs to the technical field of electrolytic synthesis of non-ferrous metals and alloys, and discloses a method for preparing ferrotitanium alloy by electrolyzing ilmenite or high-titanium slag in a boron-containing molten oxide system. A titanium raw material is mixed into a B2O3-CaO-CaF2-SiO2 system after dehydration to form a melt; the melt is placed in a crucible and put into a sealed reactor; a cathode and an anode are put in, and a certain distance is kept between the two, and inert gas protection is provided; the temperature is raised to the working temperature, and electrolysis is carried out for a certain time; the product is taken out after cooling, washed with dilute acid and distilled water, and dried. The addition of B2O3 to the CaO-CaF2-SiO2 system for high-temperature molten oxide electrolysis can accelerate the dissolution of TiO2 in ilmenite and high-titanium slag, reduce the melting point of the molten salt, increase the migration rate of titanium ions, reduce the melt viscosity, and significantly improve the dissolution efficiency of TiO2 and the efficiency of electrolytic titanium.

The invention relates to a full-carboxyl biomass gel electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing Tempo oxidized nano-cellulose dispersion liquid with sodium alginate, pouring the mixture into a mold, immersing the mold into a divalent zinc salt solution, and standing to obtain the nano-cellulose / sodium alginate gel electrolyte. According to the invention, Tempo oxidized nano-crystalline cellulose dispersion liquid and sodium alginate are mixed, and the gel electrolyte with a dual-network structure is constructed through hydrogen-bond interaction between the Tempo oxidized nano-crystalline cellulose dispersion liquid and sodium alginate and rapid metal coordination between sodium alginate and zinc ions and is used for the zinc ion battery. The stable three-dimensional network structure and rich polar carboxyl functional groups of the gel electrolyte can accelerate the transmission rate of zinc ions and adjust interface zinc ion deposition, so that the effects of inhibiting zinc dendrites and reducing interface side reactions are achieved. The method is simple, the raw materials are easy to obtain, the repetition rate is high, and the prepared gel electrolyte has high ionic conductivity and good mechanical performance.

The application provides a battery electrolyte, comprising an additive component, the additive component comprising a nitrogen-containing heteroatom bridged ring structure, fluorine-containing acid root ions and / or fluorine-containing imine negative ions. The application modifies the electrolyte by selecting a specific additive component to form a stable and firm CEI film on the positive electrode surface to protect the electrode structure, and introduces fluorinated anions to enhance the association of anions and electrolyte solvent molecules, so as to improve the oxidation stability of the electrolyte. The modified electrolyte can be used to solve the instability of high-nickel ternary materials during the cycle process and the problem that the traditional electrolyte is prone to oxidative decomposition at high voltage, so as to improve the cycle life and rate performance of the ternary lithium battery at high voltage. The application is helpful to improve the oxidation stability of the electrolyte, reduce the charge transfer impedance and interface impedance, improve the ion diffusion rate, and enhance the stability of the electrode material structure.

The application belongs to the field of energy materials and photocatalytic hydrogen production, and provides a preparation method and application of a trivalent rhodium-doped titanium dioxide photocatalyst. The method comprises the following steps: (1) immerging rutile titanium dioxide powder in a rhodium salt solution, ultrasonic dispersion, stirring in a 50-90 DEG C water bath until uniform, continuing to stir until the solvent is evaporated, and obtaining a precursor powder; (2) placing the precursor powder obtained in step (1) in a quartz tube, and performing calcination under an air atmosphere rich in water vapor, and obtaining the trivalent rhodium-doped titanium dioxide photocatalyst. The preparation process is simple, the generation of quadrivalent rhodium ions which are not conducive to photocatalytic hydrogen production reaction can be inhibited, and the trivalent rhodium-doped titanium dioxide photocatalyst is obtained. The visible light photocatalytic hydrogen production activity of the obtained rhodium-doped titanium dioxide photocatalyst is much higher than that of a photocatalyst synthesized by a traditional solid phase method, and the rhodium-doped titanium dioxide photocatalyst has good stability.

The invention discloses a high-conjugation biomass carbon quantum dot and a preparation method and application thereof.The method comprises the steps that a biomass material is subjected to pre-irradiation treatment with the electron irradiation dose being 900-3600 kGy, water is adopted to prepare an aqueous solution, and then a hydrothermal reaction is conducted; and after the reaction is finished, cooling, centrifuging, removing large particles, dialyzing the supernate by using a 1000Da dialysis bag, collecting the solution in the dialysis bag, and freeze-drying to obtain the high-conjugation biomass carbon quantum dots. The high-conjugation biomass carbon quantum dot disclosed by the invention can remarkably improve the electron migration rate and the free radical scavenging capacity, so that the redox balance in a plant body is more efficiently maintained. The carbon quantum dots can improve the photosynthesis level, the membrane lipid stability and the cell antioxidant system activity of plants in a saline-alkali environment in a foliage spraying manner on the premise of not changing the plant gene background, and show excellent environmental adaptability and physiological regulation ability.

The invention provides an electrochemical device and electronic equipment, the electrochemical device comprises a positive electrode, a negative electrode and a diaphragm, the diaphragm comprises a base film and a coating layer, the coating layer comprises a first coating layer and / or a second coating layer, the coating surface density of the first coating layer is a g / m < 2 > / mu m, the coating surface density of the second coating layer is b g / m < 2 > / mu m, an electrolyte contains a fluorosulfonamide compound, and the electrolyte contains an electrolyte. The mass content of the fluorosulfonamide compound in the electrolyte is c%, and the binding power efficiency of the electrolyte is M; the following relational expression is satisfied: M = 25% * a + 75% * b; c / M is greater than or equal to 2.67 and less than or equal to 49.52; through the synergistic effect of the coating layers on the two sides of the diaphragm, the cycling stability, the rate capability and the safety of the battery are improved, meanwhile, the lithium dendrite penetration risk is effectively inhibited, and good dimensional stability is kept under the high-temperature condition; by synergistically limiting the coating surface density of the first coating layer and the second coating layer and the mass content of the fluorosulfonamide compound, the cycling stability, the interface compatibility and the high-temperature storage performance of the lithium ion battery can be remarkably improved.

The invention belongs to the technical field of semiconductors, and discloses a composite coating for a semiconductor device and a preparation method thereof.The preparation method comprises the following preparation steps that organic resin and a carburant are added into an alcohol solvent to be evenly mixed, and a resin solution is obtained; the method comprises the following steps: adding a tantalum source and a phase forming accelerant into an alcohol solvent, stirring and mixing to obtain a tantalum solution; the surface of the base body is coated with a resin solution and a tantalum solution, heating curing, carbonization and cooling are carried out, a composite coating containing glassy carbon and tantalum carbide is obtained, and the composite coating is of a single-layer structure or a double-layer structure; the single-layer structure is a composite single-layer coating containing glassy carbon and tantalum carbide; the double-layer structure is a double-layer coating structure comprising a glassy carbon layer and a glassy carbon and tantalum carbide composite layer from bottom to top from one side of the surface of the base body. The density of the composite coating prepared by the method can be effectively improved, so that the corrosion resistance of the composite coating in a plasma environment is improved.

The invention provides carbonized aggregate, a carbonized product with high carbonization depth and a preparation method of the carbonized aggregate, and belongs to the technical field of carbon sequestration building materials.The preparation method comprises the following steps that solid waste raw materials, cement, silica fume, a thickening agent, a water reducing agent and water are evenly mixed and subjected to pouring forming, and a green body is obtained; and drying the green body until the water content is 13-20%, and carbonizing and curing to obtain the high-connectivity artificial carbonized aggregate. And stacking a plurality of high-connectivity artificial carbonized aggregates in a mold in advance, pouring the slurry into the mold, maintaining at 25 DEG C for 24 hours, demolding, carrying out microwave pretreatment, and then carrying out carbonization maintenance to obtain the carbonized product. According to the method for constructing the continuous carbon dioxide transportation network by using the high-connectivity artificial carbonized aggregate and the preset aggregate technology, the light high-strength carbonized product with the high carbonization depth is prepared, the compressive strength can reach 39.23 MPa after the carbonized product is carbonized for 1 day, the density is 1711 kg / m < 3 >, the carbonization degree is 43.27%, the carbonization uniformity depth is 50 mm, the carbon fixation amount is 356.2 kg / m < 3 >, and the pre-curing time is 4 h.

The application relates to the technical field of batteries, and provides an electrochemical device, which comprises a positive electrode sheet, a negative electrode sheet and a separator, the negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer located on at least one side surface of the negative electrode current collector, the negative electrode active layer comprises a negative electrode active material, the negative electrode active material comprises a silicon-based material; the separator comprises a base film and a ceramic layer arranged on at least one side surface of the base film, the ceramic layer comprises a plurality of interval distributed stripes and a plurality of interval areas located in the middle of adjacent stripes, the width of the stripe is A1 mu.m, and the width of the interval area is A2 mu.m; the electrochemical device satisfies the relationship formula 0.06 <= A * C <= 0.9, wherein A is A1 / A2, and C is the mass content of silicon elements in the negative electrode active material. The scheme effectively alleviates the volume expansion of the silicon negative electrode, improves the charging and discharging efficiency, reduces the minimum residual power level capable of effective discharging, and improves the available discharge depth.

The invention provides a polyanionic precursor and a preparation method thereof, a sodium ion battery positive electrode material and a sodium ion battery. The polyanionic precursor comprises a sodium element, an iron element and a phosphorus element; wherein the total amount of substance of the iron element is NFe, the total amount of substance of the phosphorus element is NP, and the ratio of the total amount of substance of the iron element NFe to the total amount of substance of the phosphorus element NP is larger than or equal to 0.8 and smaller than or equal to 0.9. The polyanionic precursor disclosed by the invention has a relatively high iron-phosphorus ratio, is beneficial to exerting the battery capacity, and meanwhile, improves the rate capability of the battery, so that the battery can still keep stable electrochemical performance in a high-rate charge-discharge scene.

The invention discloses a collagen-based dura mater containing a specific microporous layer and a preparation method thereof. The collagen-based dura mater containing the specific microporous layer comprises a first collagen mater layer, a second collagen mater layer and a third collagen mater layer, wherein the first collagen mater layer is suitable for facing the skull side and at least comprises mineralized collagen materials; the first collagen membrane layer is suitable for facing the brain tissue side and at least comprises a second collagen membrane layer compounded by collagen and other materials; the microporous layer is located between the first collagen membrane layer and the second collagen membrane layer and at least comprises collagen, and the range of the pore diameter and the porosity of the microporous layer meets the requirements that the microporous layer is suitable for supporting growth and migration of meningeal cells, is also suitable for preventing leakage of cerebrospinal fluid and invasion of fibroblasts, and is also suitable for ensuring a continuous phase of mechanical support; the pore diameter of the microporous layer is 5-20 [mu] m, the porosity is 60-80%, and the thickness is 20-120 [mu] m. According to the technical scheme, a three-layer composite bionic structure is constructed by introducing the microporous layer with specific pore diameter and porosity between the two collagen membrane layers, so that cross-scale collaborative optimization of mechanical support, biological activity and anti-leakage performance of the dura mater repair material is realized.

The invention discloses a filtering device of an intelligent extractor hood, the intelligent extractor hood and a control method, and the filtering device of the intelligent extractor hood is used for being arranged in an oil smoke channel of the extractor hood; the filtering device comprises an electret pre-charged filter screen and a filter element, the piezoelectric transducer assembly comprises a first piezoelectric transducer and a second piezoelectric transducer which are arranged on the two opposite sides in the oil smoke channel; the electret pre-charged filter screen and the piezoelectric transducer assembly are sequentially arranged from upstream to downstream along a lampblack flowing path.

The application provides a lithium iron phosphate positive electrode material and a preparation method thereof. The preparation method of the lithium iron phosphate positive electrode material comprises the following steps: S1, mixing, grinding and treating an active material composition, a basic carbon source and a composite synergist in a solvent to obtain a slurry; S2, performing spray drying treatment on the slurry to obtain dry materials; S3, performing primary sintering treatment on the dry materials in a protective atmosphere to obtain lithium iron phosphate sintered materials; and S4, performing crushing treatment on the lithium iron phosphate sintered materials to obtain the lithium iron phosphate positive electrode material. The composite synergist is prepared from the following raw materials in mass percentage: 15-50% of an organic dispersant, 20-60% of a titanium compound and 10-50% of a compound of M. The application can reduce the energy requirement for synthesizing the lithium iron phosphate material and reduce the sintering temperature. The application adopts one-time addition and one-time sintering, has low energy consumption and cost, is simple to operate, simple to produce and controllable, and is easy to industrialize. The lithium iron phosphate material has high compaction density.

The invention relates to a battery monomer, a battery device, a power utilization device, an energy storage device and an energy storage system, the battery monomer comprises a shell, an electrode assembly and an electrolyte, the electrode assembly and the electrolyte are arranged in a containing cavity, the electrode assembly comprises a positive pole piece, a separator and a negative pole piece, the separator is arranged between the positive pole piece and the negative pole piece, and the separator is arranged between the positive pole piece and the negative pole piece. The positive pole piece comprises a positive pole current collector and a positive pole active material layer arranged on at least one side of the positive pole current collector, the negative pole piece comprises a negative pole current collector and a negative pole active material layer arranged on at least one side of the negative pole current collector, and the capacity of the single battery is 500Ah to 3000Ah; and when the single battery is in a full discharge state, the total size of all the positive pole pieces, all the separators and all the negative pole pieces accounts for 92%-96% in the thickness direction of the single battery on the basis that the size of the accommodating cavity is 100%. According to the invention, high energy density, long-term cycle performance and long-term use reliability can be improved at the same time.

This invention discloses a solar cell and its fabrication method, belonging to the field of solar cell technology. In this solar cell, a first intrinsic silicon layer, a first doped silicon layer, a first transparent conductive layer, and a first metal electrode are sequentially disposed on the front side of a silicon substrate; a second intrinsic silicon layer, a second doped silicon layer, a second transparent conductive layer, and a second metal electrode are sequentially disposed on the back side of the silicon substrate; wherein, the back side of the silicon substrate has a pyramidal textured structure with a height of h1, and a boron-doped diffusion layer is disposed from the apex to the bottom of the pyramidal textured structure, within a depth range from a position of h2 to a depth of h2+d; h1>h2+d. By setting an intermittent boron-doped diffusion layer on the back side of the solar cell, it can serve as a P+ emitter, thereby increasing the adsorption force of holes on the back side, reducing recombination, and thus improving the cell efficiency.

The application relates to the technical field of lithium ion batteries, and discloses a magnetic-thermal coupling assisted lithium iron phosphate battery and a preparation method thereof. The preparation method comprises the following steps: preparing a lithium iron phosphate composite positive electrode material with a magnetic-thermal effect, wherein the composite positive electrode material is a lithium iron phosphate material coated with ferroferric oxide; preparing a positive electrode sheet by taking the lithium iron phosphate composite positive electrode material as a positive electrode active material; and assembling a lithium ion battery by taking the positive electrode sheet, a metal lithium negative electrode, a diaphragm and an electrolyte. In the application, nano ferroferric oxide material is loaded on the surface of a lithium iron phosphate positive electrode material, and an external magnetic field is introduced during the use of the battery, so that the ferroferric oxide material generates a magnetic-thermal effect under the action of the magnetic field, thereby forming a local thermal field in the battery. The strategy effectively improves the reaction environment of the battery under a low-temperature condition without changing the original structure of the lithium iron phosphate positive electrode material.

The application provides a preparation method of a high-stability hydrogenation catalyst of an anti-carbon-deposition organic liquid hydrogen storage material, in which active metal Ni and rare earth metal oxide additives are loaded on a carrier by a coprecipitation method to obtain the hydrogenation catalyst. The hydrogenation catalyst prepared by the method has high specific surface area carriers, which can enhance the adsorption capacity of the catalyst and the dispersity of the active metal components, effectively improve the catalytic performance, and simultaneously, the introduction of the rare earth metal oxide modifier can optimize the reaction path, form oxygen vacancies and improve the migration rate of lattice oxygen, effectively inhibit the formation of carbon deposition, and significantly enhance the anti-carbon-deposition performance and cycle stability of the catalyst. The preparation method of the hydrogenation catalyst is mild in process, simple in required equipment, and can be used for large-scale production. In addition, the hydrogenation catalyst has high activity, stability and cycle performance without using noble metals, has good economic benefits, and has a wide popularization and application prospect.

The application provides a lithium ion battery, comprising a nonaqueous electrolyte and a winding type pole core, the surface tension of the nonaqueous electrolyte is gamma, gamma < 25 mN / m; and / or the viscosity of the nonaqueous electrolyte is eta, eta < 1.8 mPa.s; the winding type pole core comprises a diaphragm, the diaphragm comprises a base film and a functional layer, the functional layer is arranged on at least one side surface of the base film; the functional layer comprises a plurality of hydrophilic coating layers and a plurality of hydrophobic coating layers, the plurality of hydrophobic coating layers are arranged at intervals, one hydrophilic coating layer is arranged between every two adjacent hydrophobic coating layers, or one hydrophobic coating layer is arranged between every two adjacent hydrophilic coating layers; and the connection between the hydrophilic coating layer and the hydrophobic coating layer, the edge of the hydrophilic coating layer and the edge of the hydrophobic coating layer at least partially coincide; the winding type pole core comprises a flat area and a circular arc area, the hydrophilic coating layer is located in the circular arc area, and the hydrophobic coating layer is located in the flat area. The lithium ion battery provided by the application solves the problem of circular arc lithium analysis and improves the cycle life of the battery.