225 results about "Lithium fluoride" patented technology

The invention discloses a preparation method of a carbon composite material doped with multiple metal elements. The preparation process comprises the following steps: S1, dispersing a porous carbon precursor, organic lithium fluoride, an organic rare earth compound and an organic catalyst in a solvent, performing hydrothermal reaction, and drying to obtain a porous carbon precursor loaded with lithium / rare earth element / catalyst; s2, uniformly mixing the obtained material with an activating agent and a doping agent, and activating at the temperature of 900-1100 DEG C to obtain multi-metal element doped porous carbon; and S3, carrying out reduction treatment and surface passivation treatment on the multi-metal element doped porous carbon to obtain the multi-metal element porous carbon composite material. According to the obtained material, lithium-doped and rare earth-doped porous carbon is utilized to improve the electronic conductivity of the material and increase the interlayer spacing of the carbon material, a carbon nanotube is grown by utilizing a catalyst to improve the conductivity of the material and reduce expansion, and through reduction and passivation treatment, the surface activity of the material is reduced, and the first efficiency is improved.

The invention discloses an ultralow-temperature high-toughness non-magnetic steel flux-cored wire for a controllable nuclear fusion device and a preparation method of the ultralow-temperature high-toughness non-magnetic steel flux-cored wire. A special stainless steel strip is adopted to wrap a metal powder type flux core, and the flux core accounts for 29.6%-30.4% of the total mass of the flux-cored wire; the flux core comprises the following components: 14%-18% of electrolytic manganese, 21%-23% of chromium metal, 0.3%-1.0% of ferrotitanium, 4.4%-5.0% of nitrided ferrochromium, 27.5%-28.5% of nickel powder, 0.5%-1.0% of 52 # ferrosilicon, 8%-9% of molybdenum powder, 0.1%-0.3% of lithium fluoride and the balance of atomized iron powder. The problems that an existing non-magnetic steel welding material is insufficient in toughness and high in magnetic conductivity at the ultralow temperature of-269 DEG C are solved by optimizing flux-cored alloy elements of (nickel-chromium-nitrogen) synergistic stable austenite, matching with a manufacturing process of sealed baking and roller die drawing forming of powder at the temperature of 120-140 DEG C and a welding process protected by argon (Ar) with the purity of 99.999%. The AKV2 of a welded joint is larger than or equal to 34J at the temperature of-269 DEG C, the tensile strength is larger than or equal to 620 MPa, the relative permeability is smaller than or equal to 1.02, the problems that nitrogen of an existing solid welding wire is difficult to control, and hardening is easy can be solved, and the welding wire is completely matched with the extreme working condition of a controllable nuclear fusion device.

The present invention relates to a method for improving the yield of a lithium solution through concentration and crystallization, and, more specifically, to improving the yield of a lithium solution by reacting a low-concentration lithium solution with a fluorine compound so as to prepare lithium fluoride, and then concentrating and crystallizing a filtrate.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

The invention provides a solid electrolyte, a preparation method and a lithium battery, the solid electrolyte comprises a nitrate ion liquid-based metal organic framework C, polyoxyethylene and LiTFSI, the nitrate ion liquid-based metal organic framework C accounts for 3wt% of the polyoxyethylene, and the molar ratio of the polyoxyethylene to the LiTFSI is 10: 1; wherein the nitrate ion liquid-based metal organic framework C has a nitrogen-containing heterocyclic ring, and nitrate ions and Zn ions are coordinated on the nitrogen-containing heterocyclic ring. In the solid electrolyte provided by the invention, nitrogen-containing heterocyclic cations in the nitrate ionic liquid-based metal organic framework have a binding effect on TFSI-anions in the lithium salt, and meanwhile, dissociation of the lithium salt is promoted, so that lithium fluoride is generated in situ. Moreover, nitrate ions obtain electrons on the surface of the lithium metal negative electrode, and the electrons and lithium ions form lithium nitride in situ on the SEI layer, so that deposition of dead lithium is reduced, and finally, the interface stability of the battery is remarkably improved.

The invention discloses a method for recycling and regenerating a positive electrode material of a waste lithium iron phosphate battery, and relates to the technical field of positive electrode materials of lithium iron phosphate batteries. When the lithium iron phosphate battery positive electrode material is prepared, recycled lithium carbonate, recycled iron oxide red, ammonium dihydrogen phosphate, lithium fluoride, cerium nitrate hexahydrate, lanthanum nitrate hexahydrate and glucose are mixed and calcined to prepare doped modified lithium iron phosphate; coating the surface of the doped modified lithium iron phosphate with polyaniline to prepare polyaniline-coated lithium iron phosphate; and mixing the polyaniline-coated lithium iron phosphate, a conductive agent and a binder, and coating an aluminum foil with the mixture to prepare the positive electrode material of the lithium iron phosphate battery. The lithium iron phosphate battery positive electrode material prepared by the invention has good cycle performance.

The application provides a method for separating lithium salt and carbonate organic solvent from lithium battery waste electrolyte, belongs to the technical field of waste liquid comprehensive utilization, and is used for lithium ion battery production and lithium battery recycling processes, wherein part of waste electrolyte is generated, mainly containing carbonate organic solvent and lithium salt; the application first separates the carbonate and lithium salt by adopting thin film evaporation; after neutralization, the light component carbonate solvent enters a rectification system to realize the separation of carbonates, and various carbonate products meeting the national standard requirements are obtained; after high-temperature incineration cracking and removal of residual organic impurities, the heavy component lithium salt is recycled in the form of lithium fluoride; the process realizes comprehensive utilization of the waste electrolyte, and avoids waste of lithium elements and carbonate solvents.

This invention provides a method and apparatus for preparing lithium bis(fluorosulfonyl)imide. The preparation method includes the following steps: (1) mixing bis(fluorosulfonyl)imide with lithium fluoride and reacting by heating to obtain a lithium bis(fluorosulfonyl)imide solution; (2) subjecting the lithium bis(fluorosulfonyl)imide solution to vacuum treatment to obtain the lithium bis(fluorosulfonyl)imide. This invention solves the problem of excessive acid content in lithium bis(fluorosulfonyl)imide products by using physical methods and a suitable reaction apparatus for acid removal.

The invention discloses a low-melting-point high-transference-number electrolyte material for a fluorine ion thermal battery and a preparation method thereof.The preparation method comprises the steps that lithium fluoride, sodium fluoride and potassium fluoride are mixed in proportion and subjected to first calcination treatment for 4-6 h at the temperature of 500-600 DEG C, an obtained product is rapidly cooled, and powdery ternary fluoride eutectic salt is obtained; mixing cesium fluoride with the ternary fluoride eutectic salt in proportion, performing secondary calcination heat treatment for 4-6 hours at the temperature of 600-700 DEG C, and then quickly cooling to obtain powdery quaternary fluoride eutectic salt; and mixing the quaternary fluoride eutectic salt with magnesium oxide of which the mass is 0.8-1.2 times that of the quaternary fluoride eutectic salt, carrying out third calcination treatment at 400-600 DEG C for 3-5 hours, and then rapidly cooling and crushing. By adding the high-atomic-number cation salt, the fluorine ion transference number of the fused salt is improved, the multi-element eutectic salt is obtained, the salt melting point is reduced, the working temperature range of the fluorine ion thermal battery is widened, and the specific energy of the battery is improved.

The application belongs to the technical field of microwave absorption, and relates to a wave-absorbing material capable of being inkjet printed and a preparation method thereof. The wave-absorbing material capable of being inkjet printed comprises MXene nanosheets, two-dimensional inorganic nanosheets, water and ethanol, wherein the mass ratio of the two-dimensional inorganic nanosheets / MXene nanosheets is 1-40%, and the volume ratio of the water / ethanol is 0.2-0.8. The preparation method of the wave-absorbing material comprises the following steps: MXene nanosheets are prepared by placing MXene precursor powder in a mixed solution of concentrated hydrochloric acid and lithium fluoride powder for etching; two-dimensional inorganic nanosheets are prepared by mixing layered oxide ceramic powder with acid solution for ion exchange and then carrying out intercalation reaction; and MXene / two-dimensional inorganic composite nanosheet ink is obtained by uniformly dispersing the two kinds of nanosheets in a water / ethanol mixed solvent. The preparation method has low cost, is simple and convenient to operate, and is environmentally friendly, and can realize large-scale production. The prepared wave-absorbing material has good stability, can be integrated on the surface of various rigid and flexible electronic devices in the form of inkjet printing, and can effectively reduce electromagnetic wave pollution.

The utility model relates to a double-sub-single-layer OLED device with different middle spacing layers. The double-sub-single-layer OLED device comprises an ITO anode, an m-MTDATA hole injection layer, a C545T light-emitting layer, an NPB hole transport layer or an Alq hole transport layer, a DCM2 light-emitting layer, an Alq electron transport layer and an aluminum and lithium fluoride composite cathode which are arranged in sequence. The C545T light-emitting layer and the DCM2 light-emitting layer are both of a sub-single-layer structure. The OLED device overcomes the defect of quenching caused by high doping concentration in the traditional process, also avoids the defect that the doping concentration is low and is difficult to control, has a simple structure, is easy and convenient to manufacture, and can be widely applied to preparation of OLED devices.

The invention provides a preparation method of lithium hexafluorophosphate with low fluorine emission, and relates to the technical field of preparation of lithium hexafluorophosphate, the preparation method comprises the following steps: by taking anhydrous lithium fluoride as a lithium source in a closed reaction kettle, adding a carbonic ester and nitrile mixed organic solvent system, and adding ammonium pentafluorophosphate or an organic complex thereof as a phosphorus-containing precursor, in-situ generation and directional reaction of the fluorine-phosphorus-containing active substance are realized by controlling the slow release rate of the precursor. The solid weakly-alkaline fluorine trapping agent is arranged in the system and can dynamically adsorb or complex generated hydrofluoric acid and other fluorine-containing byproducts, so that fluorine dissipation is reduced. The reaction process is divided into three continuous windows of low-activity pre-reaction, directional main reaction and activity stabilization by regulating and controlling the reaction temperature, the stirring rate and the solvent polarity in stages, so that controllable reaction and uniform conversion of fluorine-containing phosphorus substances are ensured. And after the reaction is finished, gradually carrying out cooling crystallization, solid-liquid separation and drying to obtain a high-purity lithium hexafluorophosphate product. Therefore, generation and emission of hydrofluoric acid are remarkably reduced.

The application provides a purification method of lithium fluoride, high-purity lithium fluoride, lithium hexafluorophosphate, an electrolyte and a device, and the purification method of the lithium fluoride comprises the following steps: performing water washing treatment on the lithium fluoride to be purified at 0-50 DEG C to obtain a mixture containing a first solid-phase product; performing ultrasonic treatment on the mixture at 20-25 kHz to obtain a second solid-phase product through filtration; performing fluorination reaction on the second solid-phase product with electronic-grade anhydrous hydrofluoric acid to obtain a third liquid-phase product; performing ion exchange on the third liquid-phase product by using a chelating resin at 0-80 DEG C, and then performing cooling evaporation crystallization, and obtaining a fourth solid-phase product through filtration; and performing cleaning treatment on the fourth solid-phase product by using inert gas at 150-250 DEG C to obtain high-purity lithium fluoride. The high-purity lithium fluoride obtained by the purification method has low content of lithium carbonate and other impurities, and is beneficial to improving the performance and stability of subsequent products.

This invention belongs to the field of lithium-ion battery electrolyte material preparation technology, and provides a solid lithium hexafluorophosphate with low fine crystal content and its preparation method. The preparation method involves adding lithium fluoride to anhydrous hydrogen fluoride to form anhydrous hydrogen fluoride slurry. A portion of the anhydrous hydrogen fluoride slurry and phosphorus pentafluoride gas are fed into a primary continuous reaction crystallizer. The resulting slurry is subjected to low-temperature fractionation to form a first stream and a second stream. The second stream enters a secondary continuous growth crystallizer and continues to react with phosphorus pentafluoride gas, followed by solid-liquid separation to obtain a solid wet product and mother liquor. The first stream, another portion of the anhydrous hydrogen fluoride slurry, and a portion of the mother liquor enter a pre-conditioning section, and the resulting pre-conditioned stream is returned to the feed end of the primary continuous reaction crystallizer. The solid wet product is then subjected to low-temperature washing and programmed vacuum drying to obtain the final product. This method, through the combination of fractional reflux, mother liquor participation in pre-conditioning, and continuous growth processes, reduces fine crystal entrainment and improves particle size distribution stability.

The invention discloses a cubic ZIF-67 / MXene wave-absorbing material as well as a preparation method and application of the cubic ZIF-67 / MXene wave-absorbing material. The preparation method comprises the following steps: reacting lithium fluoride, concentrated hydrochloric acid and deionized water to generate hydrofluoric acid, and etching an MAX phase to obtain MXene; the preparation method comprises the following steps: dispersing CoCl2. 6H2O, cetyl trimethyl ammonium bromide (CTAB) and MXene in deionized water to form a solution A; dispersing 2-methylimidazole in deionized water to form a solution B; quickly pouring the solution A into the solution B, stirring and reacting, centrifuging, freeze-drying and annealing to obtain the cubic ZIF-67 / MXene wave-absorbing material. The material is of a multi-layer sandwich structure, the reflection loss at 16.69 GHz can reach-20.79 dB, the matching thickness is 1.87 mm, the effective absorption bandwidth (RL is smaller than or equal to-10 dB) is 6.19 GHz (11.81-18.00 GHz), and the Ku wave band is covered. The method is environment-friendly in process, low in cost, simple and convenient to operate and suitable for large-scale production, and has application prospects in the fields of microwave absorption, infrared stealth and photocatalysis.

The application discloses an interface control liquid for prelithiation electrodes, a preparation method and application, and the interface control liquid comprises a solvent and a metal salt; the solvent comprises one or more of an ether solvent, an ester solvent, a ketone solvent, a hydrocarbon solvent, a nitrile solvent or deionized water; the metal salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium bisoxalate borate, lithium bisfluorosulfonimide, lithium bistrifluoromethylsulfonimide, lithium perchlorate, lithium fluoride and lithium chloride; the concentration of the metal salt is 0.001 g / mL-10 g / mL; the prelithiation electrode is obtained by supplementing lithium to an electrode by a chemical prelithiation solution; the interface control liquid is used for modifying the prelithiation electrode, the metal salt of the interface control liquid reacts with the chemical prelithiation solution remaining on the surface of the prelithiation electrode, and a solid electrolyte layer containing inorganic lithium salt is generated on the surface of the prelithiation electrode; wherein, the content of the inorganic lithium salt is between 5% and 90%.

The utility model belongs to the technical field of lithium fluoride reaction kettle feeding, and particularly relates to a lithium fluoride reaction kettle feeding device which comprises a support, and a raw material barrel and a conveying pipe are fixedly connected to the side wall of the support. A control valve is arranged at the bottom of the second hose; the bottom of the control valve is fixedly connected to the top of the conveying pipe; a conveying stud is rotationally connected into the conveying pipe, and one end of the conveying stud is fixedly connected with a driven gear. A first driving gear is meshed with the side wall of the driven gear, and a second motor is arranged at the end part of the first driving gear; raw materials required by a lithium fluoride reaction kettle are preloaded by arranging the raw material cylinder, the conveying stud is arranged to guide the raw materials, and the second motor is arranged to provide power for conveying the raw materials, so that the feeding accuracy of the powder raw materials is improved, the problem that the feeding amount of a traditional automatic feeding device is not easy to control is solved, and the production efficiency is improved. And the labor cost can be reduced.

The present application belongs to the technical field of waste resource recycling, and particularly relates to a method for recovering lithium from waste liquid. The method comprises the following steps: mixing hydrochloric acid desorption liquid and sodium hydroxide to perform a precipitation reaction, reacting the sodium hydroxide with impurities in the hydrochloric acid desorption liquid to generate precipitates insoluble in water, and then performing solid-liquid separation, so as to remove calcium, magnesium, iron and other impurity ions in the waste liquid and obtain an alkali metal solution; then, carbon dioxide is introduced into the alkali metal solution to perform carbonization and pyrolysis, and lithium resources in the solution are chemically transformed into lithium carbonate, so as to recover the lithium resources. The method for recovering lithium from hydrochloric acid desorption liquid provided by the present application effectively extracts lithium resources from hydrochloric acid desorption liquid which needs to be discharged to a sewage treatment station by an enterprise, and converts the lithium resources into lithium carbonate raw materials for producing high-purity industrial product lithium fluoride, thereby effectively reducing the operating cost of the enterprise and enhancing the competitiveness of the enterprise in the lithium fluoride market.

The invention discloses single-crystal lithium iron phosphate and a preparation method and application thereof, and belongs to the technical field of battery materials, the method comprises the following steps: S01, treating and recycling a lithium iron phosphate positive plate, a separation current collector and an active component feed liquid by using hydrogen peroxide, heating the active component feed liquid and phosphoric acid to react, and cooling to age iron phosphate crystals to obtain a lithium iron phosphate crystal; filtering, collecting solids and washing to obtain iron phosphate crystals; s02, mixing the iron phosphate crystals with glucose, and sintering the mixture for the first time at 400-680 DEG C in an inert gas atmosphere to obtain an iron phosphate precursor; and mixing the iron phosphate precursor, glucose, lithium carbonate and lithium fluoride, sanding, drying, and further sintering for the second time at 700-750 DEG C in an inert gas atmosphere to obtain the single-crystal lithium iron phosphate. The monocrystal lithium iron phosphate is uniform in particle size distribution, high in product purity and high in compaction density, and can be applied to the field of high-compaction high-performance long-circulation energy storage.

The invention provides a waste lithium ion battery electrolyte recovery process and equipment, and relates to the technical field of solid waste resourceful treatment.The waste lithium ion battery electrolyte recovery process comprises the following steps that S1, a completely-discharged waste lithium ion battery is decomposed in an inert gas glove box, scraps such as adhesive tape are removed, the battery is immersed in a dimethyl carbonate solution, ultrasonic stirring, standing and filtering are conducted, and the waste lithium ion battery is obtained; a mixed solution is obtained; and S2, the mixed solution is transferred into a vacuum distillation device to be distilled, dimethyl carbonate and an electrolyte are obtained, and dimethyl carbonate can be circularly used for extraction of other waste electrolytes. According to the scheme, through dimethyl carbonate extraction and vacuum distillation, efficient recovery of the electrolyte is finally achieved, lithium salt is recovered in the form of lithium fluoride, key metal of the lithium battery is recovered, fluoride and phosphate can serve as high-purity products to be reused, the resource utilization efficiency is improved, and emission of toxic gas is avoided.

The invention discloses an electrolyte and a battery, and belongs to the technical field of electrolytes. The electrolyte comprises a multifunctional additive, and the multifunctional additive comprises fluorinated esters containing unsaturated bonds and sulfonic acid groups or sulfuric acid groups. Compared with a traditional film-forming additive, the multifunctional additive can preferentially form a film, so that a thinner and more compact solid electrolyte interface film can be formed, and the problem that an oxygen free radical-electrolyte solvent intermediate generates reducing gas at a negative electrode is solved. The multifunctional additive can form films on a negative electrode and a positive electrode, and is beneficial to reducing decomposition and oxygen release of a positive electrode lithium supplement agent in a cyclic storage process. The multifunctional additive contains sulfonic acid or sulfuric acid groups, so that the impedance of the battery can be reduced, and the high-temperature cycle and storage performance of the battery can be improved; the fluorine element contained in the electrolyte tends to generate lithium fluoride during film forming, so that the lithium ion diffusion energy barrier is reduced, the mechanical stability of a solid electrolyte interface film is improved, the formation of lithium dendrites is avoided, and the electrochemical performance is improved.

The invention provides a multi-modified lithium-rich manganese-based positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a lithium-rich manganese-based precursor, a lithium source, lithium fluoride, niobium pentoxide and a fluxing agent to obtain a mixed material, and carrying out first sintering treatment on the mixed material to obtain a first sintered material; mixing the primary sintering material with a carbon source, and performing secondary sintering treatment to obtain a secondary sintering material; and mixing the secondary sintering material with lithium metaphosphate, and carrying out third sintering treatment to obtain the multi-modified lithium-rich manganese-based positive electrode material. The lithium-rich manganese-based positive electrode material is subjected to multiple modification, so that the problem of structural stability of a material body is solved, the interface effect is improved, surface passivation can be realized, and no extra resistance is generated for ion and electron transmission.

The invention discloses a method for separating phosphorus pentafluoride-hydrogen chloride mixed gas, which comprises the following steps of: introducing the phosphorus pentafluoride-hydrogen chloride mixed gas into a reaction kettle by taking a perfluoropolypropyl ether fluorinated solution as a solvent and lithium fluoride as a raw material, so that the phosphorus pentafluoride and the lithium fluoride react to generate lithium hexafluorophosphate, and hydrogen chloride is discharged in a gas phase manner; heating the generated lithium hexafluorophosphate to decompose the lithium hexafluorophosphate into phosphorus pentafluoride and lithium fluoride, discharging the phosphorus pentafluoride in a gas phase manner, and retaining the lithium fluoride in the perfluoropolypropyl ether fluorinated solution for recycling; the solvent and raw materials provided by the invention can be recycled for multiple times, the whole process flow is greatly simplified, and efficient and stable separation of HCl and phosphorus pentafluoride is realized.

The invention provides a lithium niobate film modulator, a preparation method thereof and a contact hole forming method, and the preparation method of the lithium niobate film modulator comprises the following steps: S1, providing a lithium niobate film on an insulator, and etching to obtain a lithium niobate waveguide; s2, a silicon oxide layer and a metal layer are sequentially deposited on the lithium niobate waveguide, patterning processing is carried out on the metal layer to obtain a barrier layer, and the barrier layer comprises at least two modulation electrodes; s3, continuously depositing a protective layer on the barrier layer, and etching the protective layer to the surface of the barrier layer to form at least two contact holes; and S4, depositing metal in the contact hole, and patterning a metal connecting wire. The barrier layer is arranged between the lithium niobate waveguide and the contact hole in advance, so that the etching depth of the contact hole can be effectively controlled, and etching by-products such as lithium fluoride and the like can be prevented from being generated in a high aspect ratio contact hole process.

The invention relates to a process for recovering an electrolyte and co-producing potassium hexafluorophosphate, which comprises the following steps: 1) taking the electrolyte, adding potassium fluoride and potassium carbonate solid, stirring for 0.5-1.5 hours at room temperature, and then stirring for 4-6 hours at 40-50 DEG C; 2) after stirring is finished, carrying out solid-liquid separation, and recovering the solvent from the obtained filtrate in a rectification manner; 3) performing solid-liquid separation to obtain a solid, adding acetonitrile, and stirring at 20-25 DEG C for 30-60 minutes; 4) after stirring, filtering and washing to obtain a lithium fluoride solid; and carrying out rotary evaporation on the obtained filtrate at 60-70 DEG C to obtain a crude potassium hexafluorophosphate solid. According to the process, a step-by-step extraction and hydrolysis process route is adopted, operation is easy, industrial production is easy to achieve, energy consumption and cost are reduced, and the potassium hexafluorophosphate solid is produced while the electrolyte is recycled; and guidance is provided for electrolyte recovery and potassium hexafluorophosphate synthesis in the future.

The application relates to the technical field of sensors, and particularly discloses a magnesium-based metal ceramic sensitive element for a breathing pump and a preparation method thereof. The sensitive element is prepared by sintering a magnesium-based metal ceramic composition, and the raw materials include a magnesium-zinc-calcium medical magnesium alloy matrix phase, a dual-phase ceramic functional phase compounded by fluorophosphate calcium and magnesium boride, a low-temperature sintering fluxing compatible phase compounded by lithium fluoride and calcium fluoride, a potassium fluozirconate interface bridging modification component and a high-purity indium conductive stabilization component. The sensitive element is prepared through inert atmosphere raw material mixing, drying, powder pre-activation, cold isostatic pressing, double sealing and protection, stepwise low-temperature pulse discharge sintering, forming processing, surface passivation and working condition pre-stabilization treatment. The sensitive element is suitable for medical breathing pump sensing, has good conductivity, creep resistance and biocompatibility, and is suitable for high-frequency alternating working conditions; the preparation method is controllable, can realize low-temperature densification sintering, and guarantees the stability of the element structure and performance.

The invention provides a solid electrolyte, a preparation method thereof and a lithium battery. The preparation method of the solid electrolyte comprises the following steps: providing raw materials including lithium chloride, indium chloride, yttrium chloride and lithium fluoride according to a stoichiometric ratio of Li3In1-mYmCl6-nFn, m being 0.05-0.4 and n being 0.15-0.45; grinding the lithium chloride, the indium chloride, the yttrium chloride and the lithium fluoride to prepare a precursor; and carrying out primary sintering at the temperature of 120-200 DEG C, and carrying out secondary sintering at the temperature of 240-280 DEG C. The positive ion-negative ion double-site cooperation strategy aims at breaking through the performance bottleneck of traditional doping, and the solid electrolyte has high ionic conductivity, wide voltage stability, low interface impedance and long cycle life at the same time.

The invention provides a gradient artificial SEI layer and a preparation method thereof, a negative electrode containing the SEI layer and a solid-state battery, the gradient artificial SEI layer comprises a surface layer, a middle layer and an inner layer which are sequentially stacked, the surface layer comprises lithium selenide and lithium fluoride, the middle layer comprises Li3PS4, and the inner layer comprises Li2S; in the gradient artificial SEI layer, the surface layer faces the solid electrolyte layer, and the inner layer faces the lithium negative electrode. The gradient artificial SEI layer can regulate and control the interface between the solid electrolyte layer and lithium metal and reduce the interface impedance, meanwhile, Li2S in the gradient artificial SEI layer is high in stability and not easy to decompose, the problems of chemical instability of the interface between the lithium metal negative electrode and the electrolyte and out-of-control interface impedance are solved, and the lithium metal negative electrode has good electrochemical performance. And finally, the cycle performance of the solid-state battery is improved and the interface impedance is greatly reduced.

The invention relates to the technical field of power cables, and provides a corrosion-resistant cross-linked polyethylene insulated power cable which comprises a conductor, a cross-linked polyethylene insulating layer, a metal shielding layer, an armor layer and an outer sheath layer from inside to outside. The outer sheath layer comprises the following components in parts by weight: 55-65 parts of polyethylene, 12-18 parts of polyvinyl chloride, 2-4 parts of ethylene-vinyl acetate, 20-24 parts of carbon black, 15-20 parts of a filler, 10-12 parts of a plasticizer, 2-4 parts of a corrosion inhibitor, 2-4 parts of an anti-aging agent, 12-15 parts of magnesium hydroxide, 24-30 parts of aluminum hydroxide and 1-2 parts of dicumyl peroxide; the filler comprises talcum powder, barium carbonate and pretreated magnesium oxide in a mass ratio of 2: 1: (0.6-1.3); the pretreated magnesium oxide is lithium fluoride coated magnesium oxide. Through the technical scheme, the problem of insufficient corrosion resistance of the crosslinked polyethylene insulated power cable in the prior art is solved.

This invention proposes a high-performance perovskite quantum dot light-emitting diode (LED) based on carbazole-phosphonic acid and its derivatives, and its fabrication method. The perovskite quantum dot emitting layer and / or hole functional layer incorporate an interface modification material with a carbazole-phosphonic acid structure as the core functional layer. The resulting LED device comprises an ITO anode, a lithium fluoride interface buffer layer, a zinc oxide electron transport layer, and a metal cathode. This invention utilizes a one-step solution-blending spin-coating method to prepare a modified functional layer with surface passivation and a microscopic PN junction space charge region structure. It also demonstrates a device fabrication method using commercially available MeO-2PACz materials to replace PEDOT:PSS. The device exhibits stable and efficient structure, high bandgap matching, and the fabricated perovskite quantum dot LED demonstrates high brightness, significantly suppressed efficiency roll-off, and excellent high-current operating stability, showing great application potential in large-area displays and solid-state lighting.