135results about How to "Reduce decomposition" patented technology

The invention discloses an arylamine compound, a composition containing the arylamine compound and an organic light-emitting device. The structure of the arylamine compound is as shown in the following formula (1): # imgabs0 # formula (1). Wherein ring A is selected from substituted or unsubstituted phenanthrene ring; b is selected from structural substituents as shown in the following formula (2); # imgabs 1 # formula (2). And ring C is selected from a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring and a substituted or unsubstituted phenanthrene ring. The arylamine compound provided by the invention has a series of excellent physical and chemical characteristics, and has a good application prospect in the photoelectric field. Specifically, the arylamine compound has excellent photoelectric stability, can effectively resist performance degradation caused by illumination and current change, and ensures stable output of the device in long-time operation. The light-emitting diode has the advantages of low sublimation temperature, low driving voltage, high light-emitting efficiency and long device service life.

The invention relates to a metal additive modified Pt-loaded CeO2 catalyst, preparation and application thereof in CO oxidation, and belongs to the technical field of industrial catalysis. The preparation process of the catalyst mainly comprises the following steps: respectively dissolving cerium salt, platinum salt and auxiliary metal salt in deionized water to prepare corresponding precursor solutions; then, mixing the three solutions, and dropwise adding ammonia water under a stirring condition until yellow precipitates are generated; and finally, drying and washing the precipitate, and calcining the solid powder in a proper atmosphere to obtain the assistant metal modified Pt / CeO2 catalyst. La, Pr, Nd or Sm auxiliary metal is introduced into the Pt / CeO2 catalyst, so that the CO catalytic oxidation performance of the catalyst can be improved, and the poisoning resistance of the catalyst in an SO2-containing environment can be enhanced. The method has important significance in the actual industrial application, especially in the catalytic oxidation process under the condition of treating complex flue gas.

The invention provides an electrolyte, which comprises a lithium salt and an organic solvent, and the organic solvent comprises a cyclic non-coordination solvent represented by the following formula (I) # imgabs0 # (I), in the formula (I), R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are respectively and independently selected from a hydrogen atom, a chlorine atom, a bromine atom, a fluorine atom, a C1-C3 alkyl group, a C1-C3 alkoxy group, a fluorine-substituted C1-C3 alkyl group or a fluorine-substituted C1-C3 alkoxy group. The electrolyte provided by the invention can be applied to the lithium metal secondary battery, and can significantly improve the cycle stability and safety of the battery and prolong the cycle life of the battery; meanwhile, decomposition of the coordination type solvent can be effectively inhibited, and uniform deposition of metal lithium dendrites is realized, so that the stability of the electrolyte is improved; and moreover, the high-temperature storage gas production inhibition effect is obvious.

The invention relates to a double-layer coated silicon-carbon composite material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: adding a porous carbon precursor with a particle size D50 of 5-10 [mu] m into a chemical vapor deposition furnace, and introducing monosilane for 100-800 min for silicon deposition to obtain a silicon-carbon composite material; introducing acetylene gas, and reacting for 50 to 500 minutes to obtain a primary carbon-coated silicon carbon composite material; dissolving lithium nitrate in absolute ethyl alcohol, adding the primary carbon-coated porous silicon-carbon composite material, stirring and dispersing, dropwise adding an ammonium dihydrogen phosphate solution into the solution, and reacting at 60-80 DEG C for 1-3 hours; and carrying out suction filtration, cleaning and drying on the reacted material to obtain the porous silicon-carbon composite material with the double-layer coating structure. Through the double-layer coating structure, the electrochemical stability and mechanical stability of the material are improved, and meanwhile, the application scene of the silicon-carbon negative electrode material at low temperature is expanded.

The invention discloses a lithium-doped silicon-carbon composite material, a preparation method and application, and belongs to the technical field of preparation of lithium ion battery negative electrode materials. According to the lithium-doped silicon-carbon composite material disclosed by the invention, metal lithium is doped in porous carbon, and nano silicon is deposited on the surface of the porous carbon, so that the resistivity of the composite material is reduced; the rate capability of the lithium ion battery is improved; the surface of the nanometer silicon is coated with carbon twice through passivation gas and carbon source gas, so that the defects of the surface of the nanometer silicon are reduced, and the nanometer silicon is prevented from being in direct contact with an electrolyte, thereby reducing the side reaction of a negative electrode interface of the lithium ion battery, reducing the decomposition of the electrolyte, reducing the gas production and improving the first efficiency.

The invention relates to the technical field of biological prevention and treatment, and discloses a composition for preventing and treating rice sheath blight disease, which is prepared from the following raw materials in parts by weight: 80 to 90 parts of validamycin, 30 to 45 parts of traditional Chinese medicine extract paste, 10 to 20 parts of traditional Chinese medicine raw medicine, 15 to 19 parts of white carbon black, 10 to 17 parts of copper sulfate, 12 to 16 parts of chitosan, 9 to 15 parts of gibberellin, 5 to 9 parts of tebuconazole, 1 to 5 parts of compound sodium nitrophenolate, 2 to 4 parts of emulsifier and 1 to 3 parts of synergist. Gleditsia sinensis, sanguisorba officinalis, flos rhododendri mollis and sapindus mukorossi peel in the traditional Chinese medicine raw medicines are used for synergistically killing bacteria, enhancing the immunity of plants and delaying the decomposition of validamycin, and meanwhile, extracts of honeysuckle, dandelion, croton and artemisia annua in the traditional Chinese medicine extract are complementary with validamycin in the aspects of sterilization, virus resistance and plant resistance improvement; therefore, the effect of validamycin is more durable, the duration of single application is longer, and the manpower and material resource cost is saved.

The invention provides a flame-retardant additive for an electrolyte and application, and relates to the technical field of lithium ion batteries. Specifically, the flame-retardant additive comprises a compound formed by connecting a nitrogen-containing six-membered ring and a phosphorus-containing five-membered ring through double bonds, and the compound further comprises hydroxyl, carboxyl and a plurality of fluorine atoms and at least comprises four fluorine atoms. When the electrolyte is prepared based on the flame-retardant additive, raw materials including a lithium salt, an organic solvent, a conductive additive and a film-forming additive are also adopted. The flame-retardant additive disclosed by the invention has an excellent flame-retardant effect, strong applicability and good stability, can improve the electrochemical performance of an electrolyte or a battery to a certain extent, and has a good application prospect.

The invention discloses a deepwater net cage fish feeding control method and system, and the method comprises the steps: generating a cultured fish detail list in a target deepwater region according to the fish information, and carrying out the multi-round spiced salt denoising processing of the obtained image data of the target deepwater culture region, inputting the underwater light data into the water body thermal stratification model to obtain each deepwater hierarchy and short wave radiation data corresponding to each deepwater hierarchy; and analyzing and identifying the image data through an AI graph identification algorithm to obtain fish growth data, constructing a feeding amount control model according to a cultured fish detail list, the fish growth data and the short-wave radiation data, and generating a culture visualization report to realize feeding control of fishes in the target deepwater culture area. Fish growth and health are analyzed through image data, a feeding control model is constructed and optimized according to data such as the ammonia nitrogen content, the dissolved oxygen content and short wave radiation, feeding amount control is optimized, the fish growth speed is increased, the fish growth quality is improved, and long-term sustainable breeding is achieved.

The invention relates to the field of agriculture, and discloses a method for improving carbon sequestration, emission reduction and humification of manure compost. According to the method disclosed by the invention, two kinds of tailing residues (twinkling and basalt) are properly added in the manure composting process, so that negative influence on composting is avoided, and the effects of promoting carbon sequestration and emission reduction of manure composting and increasing the humification coefficient (especially basalt) can be achieved. Compared with the conventional manure composting process, the basalt is added, so that the decomposition of compost organic matters can be remarkably reduced, the total organic carbon content is increased, and the emission of CO2 and CH4 in the composting process is greatly reduced, thereby being beneficial to reducing the emission of greenhouse gases and realizing the full utilization of waste resources.

The invention discloses a data query statement generation method and device, a storage medium and electronic equipment. The method comprises the following steps: creating an initial knowledge graph corresponding to a current database, and dividing the knowledge graph into a plurality of communities by utilizing a preset clustering algorithm; generating a community summary label and an entity summary label corresponding to an entity in the initial knowledge graph; updating the initial knowledge graph based on the community summary tag and / or the entity summary tag to obtain an updated knowledge graph; matching the current questioning question with a community summary label in the updated knowledge graph, and obtaining a target community summary label related to the current questioning question; and based on the target community summary label and triple information composed of the entity, the attribute and the relationship corresponding to the target community summary label, obtaining a data query statement which is matched with the current questioning question and aims at the current database. The technical problem that it is difficult to accurately generate a local database query statement based on a large model system in related technologies is solved.

The invention provides a dietary fiber composition for reducing weight and regulating intestinal flora in a targeted manner as well as a preparation method and application of the dietary fiber composition. The composition is prepared from the following raw materials in parts by weight: 20 to 30 parts of inulin, 15 to 25 parts of germinated brown rice powder, 10 to 20 parts of pectin, 8 to 15 parts of guar gum, 12 to 20 parts of beta-glucan, 15 to 25 parts of konjac glucomannan, 10 to 20 parts of multi-element dietary fiber powder, 5 to 10 parts of compound probiotic powder, 3 to 8 parts of bitter gourd polypeptide, 3 to 8 parts of folium mori extract and 2 to 5 parts of protein hydrolysate. Multi-element dietary fiber powder, prebiotics and the like are combined, endogenous GLP-1 is stimulated, the characteristics that the protein nutrient is not easily absorbed by people, but can be utilized by intestinal flora to generate SCFA and stimulate GLP-1 secreted by L cells at the far end of the intestinal tract are fully exerted, the requirements of most people for weight losing and weight control can be met, the protein nutrient can serve as a source of DDP-IV inhibitory peptide, decomposition of the endogenous GLP-1 is slowed down, and the weight losing and weight control effects are achieved. A more lasting effect of endogenous GLP-1 is ensured; a hot extrusion embedding technology and an airflow cutting technology are adopted, so that more nutrient substances can be effectively reserved in intestinal tracts at the same time, and nutrients are provided for flora.

The invention relates to the technical field of adhesives, and discloses an environment-friendly water-based adhesive and a preparation method thereof. The water-based adhesive prepared by the preparation method disclosed by the invention is prepared from the following raw materials in parts by weight: 20 to 30 parts of polyethylene glycol adipate glycol, 3 to 8 parts of modified polyacrylic acid, 13 to 18 parts of isophorone diisocyanate, 3 to 6 parts of a modified chain extender, 0.005 to 0.02 part of a catalyst, 0.2 to 0.5 part of propylene glycol, 0.1 to 0.3 part of triethylamine, 3 to 6 parts of acetone and 50 to 70 parts of deionized water. The waterborne polyurethane adhesive is synthesized by adding auxiliaries such as modified polyacrylic acid and a modified chain extender, so that the adhesion, heat resistance, water resistance and the like of the adhesive are improved, and meanwhile, the waterborne polyurethane adhesive has certain environmental protection performance.

The invention discloses lead-free perovskite Cs2NaHoBr6 as well as a fractal structure, a preparation method and application thereof, and belongs to the technical field of photoluminescence and fractal crystal growth. The lead-free perovskite Cs2NaHoBr6 is successfully synthesized through a novel solvent boiling method, and compared with a traditional fluorescence thermal quenching perovskite material, the lead-free perovskite shows thermally enhanced red light and near infrared light emission under excitation of ultraviolet light, blue light and near infrared light, has up-conversion and down-conversion luminescence capabilities, and can be used for preparing a luminescent material. The emission peak intensity is in positive correlation in the range of 293-593 K, and an abnormal heat quenching resistance behavior is shown. Cs2NaHoBr6 powder is dissolved in an anti-solvent, and a fractal structure pattern with preferred orientation and self-similarity characteristics is prepared by using an in-situ solution crystallization method, so that the temperature sensing performance of the compound is remarkably improved, the relative sensitivity of the compound is enhanced from 1.14% K <-1 > to 2.60% K <-1 >, and the compound shows a good application prospect in the aspect of non-contact optical temperature measurement.

The invention relates to the field of lithium ion batteries, in particular to a high-silicon negative electrode battery electrolyte charging and discharging control system which comprises a high-silicon negative electrode battery, a detection module, a data processing module and an adjustment control module. By collecting the resistance and temperature of the SEI film on the surface of the high-silicon negative electrode battery and the concentration of the electrolyte additive in real time, comprehensive monitoring of the charging and discharging process of the battery is achieved, through multi-stage judgment of the data processing module, the electrolyte state of the high-silicon negative electrode battery in the charging and discharging process is effectively managed, the charging and discharging efficiency is improved, and the battery quality is improved. According to the method, parameters can be automatically adjusted according to different working conditions, the adaptability is high, the application range is wide, charging and discharging currents are intelligently adjusted by monitoring the state of the SEI film, a proper SEI film is controlled to be formed, and the service life of the battery is effectively prolonged by predicting additive consumption and supplementing additives in time, so that the high-silicon negative electrode battery works in the optimal state.

The invention discloses an efficient preparation method of trioctyl phosphate, which specifically comprises the following steps: mixing a catalyst and isooctyl alcohol, dropwise adding phosphorus oxychloride under a low-temperature condition (5-15 DEG C), keeping the temperature at 15 DEG C for 0.5 hour after dropwise adding, starting vacuum, and keeping the temperature for 2-3 hours to remove a large amount of HCl generated by reaction; under the conditions that the temperature is 60-80 DEG C and the vacuum degree is 0.098 MPa or above, reaction liquid obtained after heat preservation is completed enters a film evaporator through a peristaltic pump, diester acyl chloride which does not completely react in the reaction liquid is rapidly reacted through a film scraper to generate trioctyl phosphate, meanwhile, generated HCl is rapidly taken out, integrated synthesis is achieved, side reactions are reduced, and crude trioctyl phosphate is obtained; and carrying out dealcoholization, neutralization, light component removal and molecular distillation on the crude product to obtain a trioctyl phosphate finished product. The method is simple in process, and in a crude product obtained after esterification synthesis, the byproduct dioctyl phosphate is less, the purity is high, and the reaction is rapid; and mass production can be carried out by using existing equipment.

The invention relates to the technical field of soldering flux processing, in particular to a high-humidity type halogen-free soldering flux and a preparation method. The high-humidity type halogen-free scaling powder is prepared from, by weight, 20%-30% of a film-forming agent, 4%-8% of an active agent, 5%-10% of palm wax, 0.5%-1% of a corrosion inhibitor, 2%-5% of a thixotropic agent, 0.2%-0.6% of dimethylamine hydrochloride, 1%-2% of chlorinated rare earth salt, 5%-10% of a modifier and the balance solvent, and the modifier is obtained by mixing castor oil, octadecanamide and glycerin. The wettability of the halogen-free soldering flux prepared through the compound formula in the welding process is greatly improved, a molten pool is more stable, and welding defects are reduced. Meanwhile, due to the introduction of the modifier, especially the mixture of castor oil, octadecanamide and glycerol, the thermal stability of the scaling powder is improved, the risk that a traditional active agent is decomposed at high temperature is reduced, release of harmful gas and formation of residues are reduced, and the welding quality is guaranteed.

The utility model discloses a kind of feeders of decomposition furnace, it is related to cement production equipment technical field, including: decomposition furnace body;First feed pipe, the first feed pipe is connected and is set at the top of decomposition furnace body;First motor, the first motor is set at the top of first feed pipe, the output shaft of the first motor is penetrated to the top wall of first feed pipe and is connected with rotating shaft, the bottom of the rotating shaft is connected with dispersion disc, the diameter of the dispersion disc is greater than the diameter of first feed pipe, the top of the dispersion disc is uniformly distributed with multiple poking plate;Second feed pipe;The utility model is scattered by rotating dispersion disc and multiple poking plate under the action of centrifugal force, to prevent material more concentrated in the process of discharging, to improve the overall decomposition effect.

The present invention provides a kind of biological organic fertilizer and its production method and application, belongs to the field of biological organic fertilizer technology, and the production method of the biological organic fertilizer comprises the following steps: S1, by weight, 0.8-1 parts of seaweed crushed material, 7.5-8 parts of straw and 1-1.3 parts of human and animal feces are mixed to obtain a basic material; S2, a composite bacterial agent is added to the basic material obtained by S1, the mass of the composite bacterial agent is 0.2-0.3% of the mass of the basic material, mixed, uniformly ventilated, composted for 25-28d, and a biological organic fertilizer is obtained; the composite bacterial agent includes Bacillus licheniformis, nitrogen-fixing bacteria and micro-rhizomucor. The present invention ensures that the fertilizer release rate of the obtained fertilizer is fast and the action time is long, and the growth needs of short-growth cycle vegetables and long-growth cycle vegetables can be better taken into account.

The invention provides a unit positioning mechanism and an image forming apparatus. The unit positioning mechanism includes a first unit, a second unit, and a positioning member, the positioning member having a cylindrical portion, a hook portion, and a restricted portion, the second unit having a unit side portion, a support shaft, and a restricting portion, the hook portion restricting rotation of the second unit by engaging with the boss portion, and the restricted portion restricting rotation of the second unit by engaging with the support shaft. The restricting portion overlaps the restricted portion from the outside in the predetermined direction in a state in which the hook portion is engaged with the boss portion, and is provided with a torsion coil spring having a coil spring portion disposed in the cylindrical portion, a first arm portion, and a second arm portion, the torsion coil spring being engaged with the positioning member via the first arm portion, and the unit-side portion being engaged with the second arm portion. A force is applied to the positioning member in a direction in which the hook portion engages with the boss portion.

The invention discloses a flame-retardant board and a preparation method thereof, and relates to the technical field of composite boards. The flame-retardant plate is prepared from the following raw materials: collagen fiber powder and a plate material, the collagenous fiber powder is prepared from the following raw materials: collagenous fibers, protease and a metal salt tanning agent. The preparation method comprises the steps of protease treatment, metal salt treatment, collagen fiber powder preparation and plate preparation. The ignition time of a product plate can be effectively prolonged, so that the flame-retardant effect is exerted, and longer window time is provided to prevent, stop and delay the occurrence of a fire; and when a fire occurs, longer fire extinguishing, rescue and escape time can be provided.

This invention belongs to the field of polymer synthesis and microchemical technology, and discloses a method for synthesizing hydroxyl-terminated polybutadiene in a continuous flow microchannel reactor. The preparation method includes mixing butadiene, anhydrous ethanol, 30% hydrogen peroxide, and an antioxidant under nitrogen protection to obtain a raw material liquid, which is then pumped into the microchannel reactor via a high-pressure metering pump. The mixture undergoes preheating initiation and polymerization reactions sequentially, with viscosity monitored by an online viscometer. After the reaction, the product is obtained through gas-liquid separation, sedimentation and stratification, washing, vacuum solvent removal, and filtration. This invention utilizes a microchannel reactor, which provides precise temperature control and stable pressure. Segmented temperature control and online viscosity adjustment prevent reactor blockage, resulting in high product conversion and yield, and uniform molecular weight distribution. By adding auxiliary devices to optimize the process, continuous and stable production is achieved, making it more efficient, environmentally friendly, and controllable.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The invention provides a method for extracting and determining tea polyphenol in a tobacco extract. The method for extracting and determining the tea polyphenol in the tobacco extract comprises the following steps: preparing a standard solution of a tea polyphenol substance; adding a methanol aqueous solution into the tobacco extract, and fixing the volume to obtain a tea polyphenol diluent; sealing the tea polyphenol purified liquid, and performing ultrasonic extraction to obtain a tea polyphenol extracting solution; preparing a disodium ethylene diamine tetraacetate stabilizing solution, and fixing the volume of the tea polyphenol extracting solution by using the disodium ethylene diamine tetraacetate stabilizing solution to obtain a tea polyphenol purified solution; adding a PSA adsorbent into the tea polyphenol purified liquid, carrying out centrifugal standing to obtain a to-be-detected liquid, and carrying out instrumental analysis on the to-be-detected liquid. Through ultrasonic extraction, the loss of tea polyphenol substances is less, the preparation of a to-be-detected solution is simple, and the analysis time is short; by adding the disodium ethylene diamine tetraacetate and the PSA adsorbent, the interference of other substances on the detection of the tea polyphenol substances is reduced, so that the detection of the tea polyphenol substances in the tobacco extract is more accurate.

This invention belongs to the field of battery materials technology, and discloses a single-crystal lithium nickel manganese oxide material, its preparation method, and a lithium-ion battery. The single-crystal lithium nickel manganese oxide material contains Li... x Ni 2‑x The percentage content of O2 is C≤1.6%, C=(I LixNi2‑xO2 / (I LixNi2‑xO2 +I LiNi0.5Mn1.5O4 ))×100%, I LixNi2‑xO2 For Li in the XRD refinement results x Ni 2‑x The diffraction peak intensity corresponding to O2, I LixNi2‑xO2 +I LiNi0.5Mn1.5O4 To add LiNi to the XRD refinement results 0.5 Mn 1.5 O4 and Li x Ni 2‑x The diffraction peak intensity of the O2 two-phase model indicates a grain size of 5–11 μm. The aforementioned single-crystal lithium nickel manganese oxide material was prepared via a lithium-deficient high-temperature sintering and lithium-replenished low-temperature sintering process. Li x Ni 2‑x Large-particle monocrystalline lithium nickel manganese oxide materials with low O2 content avoid electrolyte decomposition under high voltage, thus preventing the generation of HF and Li. x Ni 2‑x The O2 reaction can effectively improve the cycle stability of the battery. Simultaneously, the high compaction density of monocrystalline lithium nickel manganese oxide material can enhance the battery's energy density, thermal stability, mechanical properties, and durability. The method for preparing monocrystalline lithium nickel manganese oxide material in this invention is relatively simple, reliable, and effective, and can utilize existing production lines.

The present invention provides a positive electrode mixture layer and a lithium-ion secondary battery that can improve the charge / discharge cycle life. The positive electrode mixture layer contains an active material, a solid electrolyte, and a binder. The active material contains a compound that contains Li, Ni, Mn, Co, and O, and the solid electrolyte contains an oxide that has a garnet-type structure and contains Li, La, and Zr. The positive electrode mixture layer contains an ionic liquid that contains an imidazolium cation and a sulfonyl imide anion. The proportion of the number of Ni atoms with respect to the total number of Li, Ni, Mn, Co, and O atoms that exist in one molecule of the compound is 12.5% or less. The amount of oxide with respect to the positive electrode mixture layer is 1-25 vol%.

The invention belongs to the technical field of peanut planting, and particularly relates to a peanut strip rotary tillage stubble cleaning seeder and a seeding method.The peanut strip rotary tillage stubble cleaning seeder is characterized in that one end of a seeding frame is fixedly connected with a fixing frame, a transmission shaft set is arranged on the inner side of the fixing frame, and the end, away from the fixing frame, of the seeding frame is rotationally connected with a plow column; a plurality of soil ploughing blades are fixedly connected to the annular side of the plow column, a stirring and dispersing column is rotationally connected to the center of the seeding frame and close to one end of the plow column, a plurality of linkage columns are fixedly connected to the annular side of the stirring and dispersing column, and the transmission end of the transmission shaft set is in meshed connection with the linkage columns. Soil scattered by the ploughing blade is further vibrated and scattered through the stubble cleaning assembly, rhizomes of crops in the previous batch in the soil are picked out, the cultivated soil is finer, the number of the rhizomes in cultivated land is reduced, decomposition and consumption of nutrients in the soil by the residual rhizomes are reduced, and unbalance of the soil nutrients is reduced.

The invention belongs to the technical field of battery materials, and discloses a coated negative electrode material as well as a preparation method and application thereof. The coated negative electrode material comprises graphite and a coating layer coated on the surface of the graphite, the coating layer is prepared from alginate and metal salt. The coating layer formed by the alginate and the metal salt can slow down decomposition of sulfide electrolyte on the graphite surface, so that the first coulombic efficiency of the battery is improved. In addition, the interface stability between sulfide and graphite is well improved.

The present invention provides a battery cell and a preparation method thereof. The preparation method of the battery cell comprises: the preparation of the battery cell, wherein the positive electrode sheet is obtained by coating the positive electrode slurry on the positive electrode current collector, drying and laminating, the positive electrode slurry comprises a positive electrode active material and a lithium supplement, and after encapsulation and before liquid injection, the preparation method further comprises a catalyst preparation step, and the process of the catalyst preparation step comprises: sequentially injecting a catalyst precursor solution into the battery cell obtained after encapsulation, standing treatment, applying a current or voltage treatment to the battery cell after standing, and removing the catalyst precursor solution; the process of applying a current or voltage treatment to the battery cell after standing makes the catalyst precursor react and adhere to the surface of the positive electrode sheet to form a catalyst; the voltage range is ‑2.5~0 V. The above method of the present application makes the synthesis process of the catalyst compatible with the preparation process of the battery cell, eliminating the equipment and process for preparing the catalyst separately, simplifying the process and reducing the cost.

The present invention relates to a preparation method and positive electrode material of a multi-coated lithium-rich manganese-based battery positive electrode material, belonging to the technical field of battery positive electrode materials. The present invention adopts a sol-gel method to prepare a lithium-rich manganese-based material, and adopts a wet chemical method to prepare a multi-coated lithium-rich manganese-based material: overcome the defects of the existing coated modified lithium-rich manganese-based positive electrode material in alleviating the dissolution of transition metals, inhibiting surface and interface side reactions, and improving the synergy of ion transmission performance, and provide a multi-coated lithium-rich manganese-based material and a preparation method composed of an inert oxide, a fast ion conductor, and a high-stability phosphate. The present invention inhibits the occurrence of surface and interface side reactions, reduces electrolyte decomposition, and enhances cycle stability, and the non-continuous island coating discontinuously forms a protective layer on the surface of the material, leaving many uncovered areas, which helps to maintain a high lithium ion transmission efficiency, thereby improving the charge and discharge performance of the battery.

The invention discloses a method for degreasing and sintering a photocuring molded ceramic green body. The method comprises the following steps: cleaning and post-curing the photocuring molded ceramic green body; then the treated ceramic body is placed in an atmosphere sintering furnace, the whole process of degreasing and sintering is continuously completed, the whole process is an integrated process of a low-temperature degreasing slow release stage, a medium-temperature transition connection stage and a high-temperature sintering stage which are sequentially conducted, and the ceramic part with the solid ceramic can be obtained. According to the method for integrally and continuously completing degreasing and firing of the ceramic green body, the microstructure evolution of the ceramic green body is more coherent, the defects of cracking, bubbling, deformation and the like of the ceramic green body are greatly reduced, meanwhile, the process is simplified, and the efficiency is improved.