293 results about "Vanadium oxide" patented technology

The invention discloses a bifunctional chiral metamaterial surface capable of switching polarization conversion and wave absorption, and belongs to the technical field of electromagnetic metamaterials. The method is used for solving the problem that most existing chiral super-structure surfaces cannot realize dynamic adjustability and quantitative controllability and cannot have dual functions of polarization conversion and wave absorption at the same time. The super-structure surface unit structure is composed of a graphene film layer, a gold-vanadium dioxide resonance layer, a silicon dielectric layer and a bottom-layer continuous gold film. Switching of two functions of polarization conversion and wave absorption is realized by changing the conductivity of vanadium dioxide; polarization conversion and dynamic regulation and control of the wave absorbing efficiency are realized by changing the Fermi level of the graphene; quantitative controllability of polarization conversion and a wave absorbing function is realized by controlling a function weighting function. Besides, the chiral super-structure surface also has the advantages of incident angle robustness, small thickness and small size, has double functions of broadband, and has potential application value in the fields of optical devices, communication equipment, biomedical sensors and the like.

The invention discloses a vanadium oxide-based supported platinum catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: a) carrying out high-temperature heat treatment on a V precursor to obtain orange V2O5 carrier powder; b) adding V2O5 powder, a Pt metal precursor and a sacrificial reagent into the solution, carrying out ultrasonic treatment, stirring, and reacting under the irradiation of a xenon lamp to obtain a dark brown suspension; c) centrifuging, washing, drying, grinding and roasting the dark brown suspension to obtain dark brown powder; and d) carrying out three times of high-temperature heat treatment on the dark brown powder under different protective gases, and sequentially carrying out three processes of oxidation, reduction and partial oxidation to obtain the vanadium oxide-based platinum-loaded catalyst. The catalyst prepared according to the invention is applied to a carbon monoxide oxidation reaction, and has the advantages of excellent catalytic performance, long-time stability and good recycling stability at a high space velocity.

The invention provides sintering flue gas denitration activated carbon and a preparation method thereof.The preparation method comprises the steps that coal-based activated carbon raw material powder and an aqueous solution of a nitrogen-containing compound and a phosphorus-containing compound are evenly mixed, impregnated and dried, and a nitrogen-phosphorus co-doped precursor is obtained; blending the catalytic components to obtain raw material strips; primarily forming pores, and activating for the first time in a water vapor atmosphere; carrying out secondary loading and pore regulation, and carrying out secondary activation to obtain a secondary carbon body; and carrying out heat treatment on the secondary carbon body in an oxygen-containing atmosphere to convert the loaded metal precursor into a metal oxide. According to the invention, through a cascade catalytic network constructed by nitrogen and phosphorus doping and titanium, tungsten and vanadium oxides and an optimized pore channel formed by step-by-step activation of water vapor and carbon dioxide, the denitration efficiency of the catalyst breaks through 80% and is far higher than that of common activated carbon. The sintering flue gas denitration system has high activity and high stability, can greatly reduce the series number of denitration towers, obviously reduces the system resistance and operation energy consumption, and provides an efficient scheme for solving the problems of low sintering flue gas denitration efficiency and high cost.

The invention relates to the technical field of catalysts, in particular to a composite catalyst for nitrous oxide decomposition and a preparation method thereof.The composite catalyst is of a three-dimensional flower-shaped structure and comprises a composite carrier and active metal loaded on the composite carrier; the composite carrier is composed of a modification additive and a carrier oxide; the performance additive is composed of alkali metal oxide and rare earth metal oxide; the carrier oxide is selected from one of aluminum oxide, titanium dioxide and silicon dioxide; the active metal comprises cobalt oxide and vanadium oxide. The multi-metal catalyst has the advantages that the multi-metal catalyst with a three-dimensional flower-shaped structure is formed by loading cobalt and vanadium active metals on aluminum oxide and under the synergistic effect of alkali metal and rare earth metal, so that the stability and durability of the catalyst in a high-temperature environment are remarkably improved.

The invention provides a method for preparing a nearly 3.5-valent vanadium electrolyte by reducing ammonium metavanadate with coke oven gas, which comprises the following steps: (1) reducing and calcining ammonium metavanadate in coke oven gas to obtain a reduced product; (2) carrying out replacement deamination on the reduced product in the step (1) to obtain a nearly 3.5-valent vanadium oxide, wherein the nearly 3.5-valent vanadium oxide contains V4O7; and (3) a mixed sulfuric acid solution and the approximately 3.5-valent vanadium oxide are subjected to a dissolution reaction, and the approximately 3.5-valent vanadium electrolyte is obtained. The process method disclosed by the invention is simple and easy to implement, the approximately 3.5 valence vanadyl sulfate electrolyte product with high vanadium concentration and low ammonia content can be obtained by taking the ammonium metavanadate and the coke oven gas as raw materials, and the application prospect is wide.

The invention provides a hydrogel-based radiation refrigeration moisture power generation material and a preparation method and application thereof, and belongs to the technical field of moisture power generation materials.The hydrogel-based radiation refrigeration moisture power generation material comprises a nano carbon black layer, a conductive hydrogel layer and a titanium dioxide layer which are sequentially stacked; the conductive hydrogel layer comprises a hydrogel matrix, a conductive filler and a temperature-sensitive material; the temperature-sensitive material comprises at least one of poly (N-isopropylacrylamide), a polyethylene glycol and polylactic acid copolymer and vanadium oxide; the cross section of the hydrogel-based radiation refrigeration moisture power generation material is of a W-shaped structure. The conductive hydrogel layer is of a three-dimensional network structure with conductivity and temperature-sensitive characteristics; the titanium dioxide layer realizes efficient sunlight reflection, the nano carbon black layer enhances heat conduction and conductivity, and the W-shaped structure promotes moisture flow and circulation; the multifunctional power generation device prepared based on the hydrogel-based radiation refrigeration moisture power generation material has good radiation refrigeration and moisture power generation performance, and is excellent in stability and durability.

A lithium-ion battery anode material containing surface-coated disordered rocksalt lithium vanadium oxide is disclosed. The surface coating contains a species selected from the group consisting of carbon, a metal oxide, a metalloid oxide, a metal fluoride, a metalloid fluoride, a metal phosphate, a metalloid phosphate, and combinations thereof. Materials, designs, synthesis methods, and devices related to fast-charging lithium-ion batteries are provided. This invention fills a technology gap by providing anode materials with disordered rocksalt lithium vanadium oxides to achieve fast charging in 10 minutes or less, greater than 200 W·h / kg energy density, a lifetime of at least 10,000 cycles, and improved battery safety. Methods of making and using the optionally surface-coated disordered rocksalt lithium vanadium oxide are disclosed. Many experimental examples are included, demonstrating several remarkable attributes of this battery technology.

The invention relates to the field of catalysts. The invention relates to a catalyst for catalytic oxidation of carbon monoxide in industrial sulfur-containing flue gas. A carrier is a cordierite honeycomb ceramic carrier coated with activated aluminum oxide (Al2O3), silicon oxide (SiO2) or titanium oxide (TiO2), or a honeycomb carrier with titanium oxide as a skeleton; the noble metal active component is selected from one or a combination of more of palladium (Pd), platinum (Pt) and rhodium (Rh), the total loading capacity accounts for 0.05-0.4 wt% of the mass of the carrier, and the noble metal component is loaded on the surface layer of the carrier at the depth of 10-300 microns and is of an eggshell type distribution structure; the cocatalyst component is selected from one or a combination of more of vanadium oxide (VO), tungsten oxide (WO), cerium oxide (CeO), molybdenum oxide (MoO) and lanthanum oxide (La2O3) and is uniformly distributed on the carrier. Unification of activity, stability and economical efficiency of the catalyst is achieved, the problems that a catalytic oxidation catalyst is prone to inactivation, low in activity and high in cost in complex sulfur-containing flue gas are solved, and the industrial application value is remarkable.

The application relates to a preparation method of a diffused island-shaped vanadium dioxide thermochromic film. The preparation method comprises the following steps: a precursor forming step: forming a vanadium oxide film with a thickness of 20-100 nm as a precursor on the surface of a substrate by a magnetron sputtering method, a thermal deposition method or a laser-induced vapor deposition method; a pretreatment step: heating the film to 600-950 DEG C at a temperature increasing rate of more than 80 DEG C / min in an annealing furnace with a pressure of 50 mTorr or less, then keeping the temperature for 5-30 min, and then cooling the film to 300-450 DEG C in the furnace to form the film into a diffused island shape; and an oxidation step: introducing oxygen into the annealing furnace to oxidize the film to obtain a vanadium dioxide film. The film prepared by the preparation method of the vanadium dioxide thermochromic film has good sunlight modulation efficiency and good light transmittance.

The invention belongs to the technical field of infrared focal plane sensor manufacturing, and particularly relates to a vanadium oxide etching post-processing method based on VHF wetting driving. Comprising the following steps: performing graded vacuumizing and temperature programming pretreatment on a wafer subjected to vanadium oxide etching, and continuously introducing VHF moistening mixed gas consisting of anhydrous hydrogen fluoride, ethanol steam and inert carrier gas into a treatment cavity; by accurately regulating and controlling the temperature and pressure of the cavity, anhydrous hydrogen fluoride is promoted to be subjected to a selective fluorination reaction with photoresist decomposition products and metal impurities left after etching to generate gaseous products, and ethanol steam synchronously exerts the dual effects of moistening, corrosion prevention and water molecule desorption promotion. According to the method, a gas phase processing mode is adopted in the whole process, liquid intervention is avoided, the problems of vanadium oxide pixel adhesion and film corrosion can be effectively solved, meanwhile, residual impurities are thoroughly removed, the electrical property stability of the vanadium oxide film is guaranteed, the yield and detection precision of the infrared focal plane sensor are remarkably improved, and the method has good industrial application prospects.

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

The invention discloses a metal oxide composite sodium ferric sulfate positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of sodium ion battery positive electrode materials. The metal oxide composite sodium ferric sulfate positive electrode material comprises the following raw materials in parts by mass: 1-20 parts of sodium sulfate, 2-40 parts of ferrous sulfate, 0.05-1 part of an antioxidant, 0.05-1 part of a carbon source and 0.01-2 parts of metal oxide, the metal oxide is at least one of ferrous oxide, ferric oxide, ferroferric oxide, manganese oxide, manganese dioxide, cobalt oxide, cobaltosic oxide, cobaltic oxide, vanadium monoxide, vanadium dioxide, vanadium trioxide, vanadium pentoxide, nickel oxide and copper oxide. The invention also discloses a preparation method and application of the metal oxide composite sodium ferric sulfate positive electrode material. The method provided by the invention can solve the problems of low conductivity and specific capacity of the existing sodium ferric sulfate positive electrode material, and has the advantages of low cost, strong process adaptability and wide application prospect.

This invention relates to the field of glass-ceramic technology, specifically providing a low-temperature co-fired ceramic, its preparation method, and its application. The raw materials for the low-temperature co-fired ceramic include VSBBS glass frit and ceramic frit, with the total weight of the VSBBS glass frit and ceramic frit being 100%. The mass percentages of the VSBBS glass frit and ceramic frit are 20-40% and 60-80%, respectively. The raw materials for the VSBBS glass frit, by mass percentage, include 10-30 wt% vanadium oxide, 10-30 wt% antimony oxide, 10-30 wt% barium oxide, 10-20 wt% boron oxide, and 30-50 wt% silicon oxide, with the sum of all oxides being 100%. The LTCC material obtained by this invention achieves excellent millimeter-wave dielectric properties, with a relative permittivity between 4.8 and 6.8, a dielectric loss less than or equal to 0.001, and a flexural strength of 180-230 MPa.

The application provides a method for preparing 3.5-valence vanadyl sulfate electrolyte by reducing ammonium polyvanadate with a gas, which comprises the following steps: (1) ammonium polyvanadate is reduced and calcined by a reducing gas to obtain vanadium oxide; the vanadium oxide contains V4O7; the reducing gas comprises a mixed gas of NH3, CO and H2; (2) a mixed sulfuric acid solution and the vanadium oxide are subjected to a dissolution reaction, and vanadium adjustment is performed to obtain 3.5-valence vanadyl sulfate electrolyte. The process is simple and easy to implement, 3.5-valence vanadyl sulfate electrolyte product can be obtained from ammonium polyvanadate as raw material, the vanadium concentration is high, and the application prospect is wide.

The invention discloses a composite electrolyte for an aqueous zinc ion battery and application of the composite electrolyte, and belongs to the technical field of electrochemical energy storage. The composite electrolyte comprises water, zinc salt and a composite additive; the composite additive includes group III metal ions as a first additive and group V metallate ions as a second additive. The invention also provides a group III metal cation doped vanadium oxide positive electrode material matched with the first additive element in the electrolyte. The composite electrolyte provided by the invention is combined with a correspondingly doped positive electrode material, so that the composite electrolyte can synergistically act on positive and negative electrode interfaces of the battery: V-group metal acid radical ions preferentially regulate and control a zinc negative electrode interface, guide zinc to be uniformly deposited and inhibit side reaction; group III metal ions are mainly used for stabilizing the bulk phase and interface structure of the positive electrode material and inhibiting the dissolution of active substances. According to the technical scheme, the rate capability, the cycling stability and the service life of the water-based zinc ion battery are remarkably improved, and the water-based zinc ion battery has important application value.

The invention provides a high-purity and high-solubility vanadyl sulfate crystal and a preparation method and application thereof.The preparation method of the high-purity and high-solubility vanadyl sulfate crystal comprises the following steps that ammonium metavanadate or ammonium polyvanadate serves as a raw material and is roasted at the temperature of 600-900 DEG C under the inert gas protection and reducing atmosphere conditions, and vanadium oxide is obtained; dissolving the vanadyl sulfate in a mixed solution of pure water and sulfuric acid to obtain a high-concentration vanadyl sulfate solution or vanadyl sulfate slurry; the valence state of vanadium is adjusted to 3.9-4.1; cooling, crystallizing and filtering to obtain primary vanadyl sulfate crystals; dissolving the primary vanadyl sulfate crystal in pure water to obtain a vanadyl sulfate solution, and filtering; and adding sulfuric acid, adjusting the vanadium valence state of the solution to 3.99-4.01, cooling, crystallizing, and filtering to obtain the high-purity and high-solubility vanadyl sulfate crystal. The vanadyl sulfate crystal has the advantages of small particle size, high purity, good solubility and the like, and has good application prospects and large-scale popularization potential in the field of vanadium electrolyte.

The invention belongs to the technical field of energy storage batteries, and particularly relates to a method for preparing a vanadium oxide electrolyte based on a sodium vanadium oxide solution and a vanadium redox flow battery. The method comprises the following steps: S1, sodium treatment leaching: treating a vanadium-containing raw material by adopting a sodium-containing compound to generate a sodium vanadium solution; s2, valence state regulation and control: dividing the sodium vanadium solution into two parts, adjusting the pH value of the first part to be acidic, and then adding a reducing agent to carry out a reduction reaction to obtain a negative electrode electrolyte containing V < 3 + > / V < 4 + >; and adding an oxidizing agent into the second part for oxidation reaction to obtain the positive electrode electrolyte containing V < 4 + > / V < 5 + >. According to the method, the vanadium slag is used for replacing high-purity V2O5 to prepare the electrolyte, so that the cost of raw materials is reduced; according to the electrolyte prepared by the invention, the energy efficiency of the battery is high; meanwhile, the preparation method disclosed by the invention adopts an integrated process, and an intermediate product treatment link is omitted, so that the preparation steps are simpler, and the production efficiency is remarkably improved.

A synthesis method for fabricating a three-dimensional energy storage foam comprising: preparing a first solution by dissolving a pre-determined amount of a polyvinyl alcohol in a pre-heated water, obtaining a second solution by adding a pre-determined amount of a vanadium salt to the first solution, producing a colloid mixture by adding a graphene oxide mixture to the second solution, obtaining a graphene oxide / polyvinyl alcohol / vanadium oxide composite by heating the colloid mixture in a pre-determined temperature under a hydrothermal condition for a pre-determined heating time, and fabricating the three-dimensional energy storage foam by heating the graphene oxide / polyvinyl alcohol / vanadium oxide composite to remove the polyvinyl alcohol under a calcining condition such that a plurality of vanadium oxide with a formula of V2O3 is decorated between the graphene oxide layers. The produced three-dimensional energy storage foam is configured to use as a working electrode for electrochemical hydrogen storage.

The invention provides a preparation method and application of a catalyst based on a crystal platinum / amorphous vanadium oxide cluster-cluster heterostructure. The preparation method comprises the following steps: S1, synthesizing an amorphous vanadium oxide cluster; s2, synthesizing a crystal platinum cluster; and S3, synthesizing the heterostructure catalyst. Through precise synthesis and interface engineering, precise assembly of amorphous vanadium oxide clusters and precise platinum clusters is realized, a highly dispersed and uniform heterogeneous interface is obtained, and the catalyst is endowed with excellent catalytic activity and stability in alkaline hydrogen oxidation reaction.

The present invention provides a low-oxygen vanadium carbide and a method for producing the same, which is formed by reducing the oxygen content, mixing vanadium oxide and a carbon compound, then refining the particle size by high-energy milling using a high-energy milling apparatus, followed by vacuum heat treatment and a carbonization reduction reaction.

The invention relates to the technical field of photocatalysis, in particular to a strontium bismuth vanadium oxide photocatalyst and a preparation method and application thereof.The chemical formula of the photocatalyst is Sr3. 59Bi19.41 V4O42, the crystal structure of the photocatalyst belongs to an orthorhombic system, the space group of the photocatalyst is Immm, and the photocatalyst is of a unique layered structure composed of cation triple plate layers; the photocatalyst is synthesized by a molten salt method, and shows the activity of photocatalytic decomposition of water to produce oxygen under visible light. The preparation method comprises the following steps: mixing and grinding SrO, Bi2O3 and VO precursors with a molten salt medium, and then carrying out temperature programming calcination to synthesize a target product; the catalyst prepared by the method has the characteristics of high crystallinity, few defects and regular morphology, the photocatalytic oxygen production performance of the catalyst is remarkably superior to that of a same-component sample synthesized by a traditional solid-phase method, and photocatalytic water decomposition and oxygen production can be realized by taking a silver nitrate, ferric nitrate, ferric chloride or potassium ferricyanide aqueous solution as a sacrificial agent system under the irradiation of visible light with the wavelength of more than or equal to 420 nm.

The present invention relates to a large-area radiative cooling film and a method for manufacturing same. The radiative cooling film can be produced to exhibit excellent emissivity and infrared transmittance, by synthesizing highly crystalline single-crystal vanadium dioxide through a chemical vapor deposition method, and optimizing the structure thereof, such as the vanadium dioxide pattern, spacing, and the thickness of each layer. In addition, the method for manufacturing a radiative cooling film can improve process speed and stability through a film thinning process based on dry transfer, and enables the manufacture of a large-area radiative cooling film.

The application discloses a vanadium oxide-based composite material, a preparation method and application thereof, and a lithium ion battery, and belongs to the field of electrode materials. The average particle size of the vanadium oxide-based composite material is any value in a range from 1 to 50 mu m, the tap density is any value in a range from 0.8 to 2 g / cm 3 , and the specific surface area is not more than 50 m 2 / g. The application is applied to the lithium ion battery field, and solves the technical problem that the bulk ion transmission process of the existing large-size and high-density micron electrode material is slow, and this problem is particularly obvious at low temperature. The vanadium oxide-based composite material not only has high tap density, but also can realize the double fast transmission of ions and electrons in the bulk phase of the material, and has high rate performance and long cycle stability even at extremely low temperature (lower than -40 DEG C).

The present invention relates to a method for producing vanadium dioxide using a tetra-arc melting method. Unlike conventional methods that require complex wet processes, long-term high-temperature heat treatment, and multi-stage reduction conditions, this method provides vanadium dioxide with high crystallinity by concentrating electrical energy on a pellet during a short arc discharge time of within a few seconds. This highly crystallin VO₂ has an accurate phase transition temperature, making it effective for use in various applications such as smart windows, heat-blocking coatings, optical films, temperature sensors, thermal switching devices, and next-generation battery materials. Furthermore, the present invention is expected to be utilized across various industrial sites, as it enables the production of highly crystalline vanadium dioxide in a much shorter time compared to existing heat treatment-based technologies, despite its simple device configuration and low manufacturing costs.

The invention provides a method for preparing a vanadium-nitrogen alloy from an organic amine vanadium precipitation product. The method comprises the steps that S1, the organic amine vanadium precipitation product, carbon powder and iron powder are mixed and then pressed into pellets; s2) placing the pellets in a heating device, continuously introducing nitrogen, heating the heating device to a first temperature, carrying out heat preservation, and collecting and drying tail gas generated in the heat preservation process; s3) heating the heating equipment to a second temperature, keeping the temperature, and introducing mixed gas of nitrogen gas and the tail gas dried in the step S2) in the process of keeping the temperature; and (S4) heating is stopped, nitrogen is continuously introduced into the heating equipment till natural cooling is achieved, and the vanadium-nitrogen alloy is obtained. According to the method for directly preparing the vanadium-nitrogen alloy through the organic amine vanadium precipitation product, compared with an existing vanadium precipitation product-vanadium oxide-vanadium-nitrogen alloy preparation route, the preparation process can be shortened, meanwhile, carbon and nitrogen elements in the organic amine vanadium precipitation product can be effectively utilized for reduction and nitridation, and the purpose of reducing environmental pollution is achieved.

The invention discloses a defect-state manganese-vanadium oxide positive electrode material and a preparation method and application thereof, and belongs to the technical field of battery materials, the defect-state manganese-vanadium oxide positive electrode material is MnxV2O6-y, 0 lt; xlt; 1, 0lt; yt; Yt; 1, the defect-state manganese vanadium oxide positive electrode material is synthesized by taking vanadium pentoxide and a divalent manganese-based compound as raw materials; vanadium pentoxide is adopted as a precursor, the vanadium pentoxide is treated through a hydrothermal method and a calcination method, the defect-state manganese-vanadium oxide material with manganese vacancy and oxygen vacancy can be successfully prepared, and the material has excellent structural stability, good conductivity and high electrochemical activity. When the defect-state manganese vanadium oxide positive electrode material is applied to an energy storage battery, relatively high electrochemical performance and excellent cycling stability can be shown.

The invention relates to the technical field of transportation mechanical equipment, and provides a spiral blade replacement anti-deformation system and method. The system comprises a horizontal supporting and positioning device used for supporting and horizontally fixing a spiral mandrel from the lower portion in the process of removing old blades and welding new blades; the circulating cooling device is communicated with the interior of the spiral core shaft to form a cooling loop for circularly cooling the spiral core shaft; and the blade fixing device is detachably clamped at the joint of each spiral blade and the blade root and is used for pressing and fixing the joint after the new blade is welded. According to the method, the mandrel of the repaired spiral conveyor is not bent, the spiral line of the blade is smooth and complete, the operation stability and the material conveying efficiency of the repaired spiral conveyor are remarkably improved, and continuous and stable material conveying between vanadium oxide production procedures is guaranteed.

The invention relates to the technical field of optical imaging, and provides a multi-scene multispectral camera system, which comprises a visible light camera assembly, a short-wave infrared camera assembly, a long-wave infrared camera assembly, a display device, a power supply system and a cable, and is characterized in that the short-wave infrared camera assembly adopts an InGaAs uncooled infrared focal plane detector; the long-wave infrared camera assembly adopts a vanadium oxide uncooled infrared focal plane detector, and the display device is equipped with a gigabit network port and an HDMI interface. The detector product has the advantages of being low in power consumption, small in size, free of TEC and the like, is suitable for vehicle-mounted low-cost and low-power-consumption application occasions with low power consumption and sensitive size, ensures that the whole process is autonomous and controllable and stable in supply through localized integration, polaroid adjustment innovation and advanced image fusion technologies, and has a wide application prospect. The efficient and stable application of the multispectral camera in vehicle equipment is realized, and the image quality and the environmental adaptability are remarkably improved.

The invention provides a vanadium dioxide temperature compensation gas flow sensor, and belongs to the field of sensor manufacturing. The sensor comprises a silicon substrate, a silicon oxide and silicon nitride layer, a heat insulation cavity, a heat insulation gap, a chromium adhesion layer, a vanadium dioxide temperature measurement resistor, a platinum heating resistor, a platinum environment temperature measurement resistor, a platinum wire and a platinum electrode, wherein a heating resistor is arranged in the center of the silicon oxide and silicon nitride layer suspended above the cavity, four vanadium dioxide temperature measurement resistors are symmetrically distributed on two sides of the heating resistor to form a Wheatstone bridge, a heat insulation gap is formed between the heating resistor and the temperature measurement resistors, and platinum environment temperature measurement resistors are distributed on the upstream and the downstream of the cavity area. When no gas flows in, chip heat distribution is symmetrical, and upstream and downstream vanadium dioxide temperature measuring resistors have the same resistance value; when gas flows in, the resistance value of upstream vanadium dioxide is increased, the resistance value of downstream vanadium dioxide is decreased, the Wheatstone bridge outputs voltage, the relation between the voltage value and the gas flow is recorded, and then the flow is compensated and corrected according to the values of the environment temperature measuring resistor and the heating resistor to obtain the final gas flow value.

This invention relates to the field of nanomaterials technology, and discloses a vanadate composite material, its preparation method, and its application. A reaction solution containing a surfactant is prepared to generate bubbles. These bubbles then act as soft templates under rapid stirring and heating. Vanadium oxide is dispersed in this reaction solution and reacted at a specific temperature for a certain time, allowing the surfactant to intercalate the vanadium oxide, transforming it into vanadate. The surfactant then coats the outer surface of the vanadate, resulting in an in-situ surface-modified vanadate composite material. The surfactant layer of this composite material can regulate the reaction layer between the electrode surface and the electrolyte, preventing electrode material dissolution or structural collapse during the electrochemical reaction process, thus significantly improving the performance of electrochemical energy storage devices. The foaming effect of the surfactant ensures that the bubbles are uniformly dispersed in the liquid, acting as soft templates for the attachment and growth of vanadate crystals.