40 results about "Lithium acetate" patented technology

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The invention discloses a polydopamine modified metatitanic acid type lithium ion sieve and a preparation method thereof, and belongs to the technical field of lithium ion sieves, the preparation method comprises the following steps: grinding and uniformly mixing lithium acetate dihydrate and titanium dioxide in an organic solvent, and calcining the mixture at 650-800 DEG C for 3-5 hours to prepare a Li2TiO3 precursor; the preparation method comprises the following steps: putting dopamine hydrochloride, aminated crown ether and a Li2TiO3 precursor into a tris (hydroxymethyl) aminomethane solution with the pH value of 8-9, carrying out a constant-temperature oscillation reaction, carrying out suction filtration, and drying at low temperature, so as to obtain the polydopamine modified metatitanic acid type lithium ion sieve. According to the lithium ion sieve, the adsorption effect on lithium ions can be improved, the lithium extraction efficiency is improved, and the problem of low adsorption capacity of a lithium ion sieve in the prior art is solved.

The invention discloses a preparation method for synthesizing a lithium battery positive electrode material by a solvent-free solid-phase method, particularly relates to the technical field of electrochemistry, and relates to the preparation method for synthesizing the lithium battery positive electrode material by the solvent-free solid-phase method. The lithium battery positive electrode material synthesized by the solvent-free solid-phase method is prepared from lithium acetate, nickel cobaltate, manganese cobaltate and a composite functional agent; the preparation raw materials of the lithium battery positive electrode material synthesized by the solvent-free solid phase method comprise the following components in parts by mass: 100 parts of lithium acetate, 74.3-97.2 parts of nickel cobaltate, 4.0-18.5 parts of manganese cobaltate and 6.8-14.6 parts of a composite functional agent, by adopting lithium acetate as a clean lithium source and combining with a solvent-free solid-phase synthesis method assisted by a composite functional agent, organic solvent pollution and harmful gas emission are eliminated from the source, and the lithium acetate is decomposed at a low temperature without solid residues by utilizing the characteristic of lithium acetate without solid residues and cooperating with a reducing atmosphere generated by decomposition of organic components in the functional agent, so that the lithium-ion battery cathode material is obtained. And the problem of pollution caused by high-temperature decomposition of the lithium salt in the traditional process is effectively avoided.

This invention discloses a process for preparing ultrafine glass powder using a spray pyrolysis method in the field of glass encapsulation materials. The process first prepares a homogeneous solution A using boric acid, aluminum nitrate nonahydrate, alkaline earth metal nitrates, lithium acetate, sodium acetate, and potassium acetate. Tetraethyl orthosilicate is dissolved in anhydrous ethanol to obtain solution B. A rare earth transition metal composite oxide nanoclusters encapsulated with a silica shell hybrid inorganic modifier is dispersed in anhydrous ethanol to obtain suspension C. Solution B and suspension C are mixed, and deionized water and hydrochloric acid are added to adjust the pH. After pre-hydrolysis and cooling, triethyl borate is added dropwise for co-condensation, and then mixed with solution A. After adjusting the pH and aging, the mixture is ultrasonically atomized and spray pyrolyzed to obtain ultrafine glass powder. The glass powder obtained by this invention has small particle size, high sphericity, and can be continuously produced.

The invention discloses a low-temperature early-strength low-viscosity liquid accelerator and a compound production process thereof, and relates to the technical field of concrete admixtures. The accelerator is formed by compounding a basic framework component, a rheological stabilizing component and a low-temperature early strength component. The basic framework component comprises an inorganic aluminum salt coagulant, anhydrous magnesium sulfate, diethanol amine and water; the rheological stabilizing component comprises liquid polyaluminum sulfate, an amphoteric inner salt viscosity reducer and cationic nano silicon dioxide sol; the low-temperature early-strength component comprises water-soluble organic aluminum salt, zirconyl sulfate, lithium acetate and water. The amphoteric inner salt viscosity reducer is matched with the cationic nano silicon dioxide sol, so that the rheological stability of the accelerator under a low-temperature condition is improved; through cooperation of the water-soluble organic aluminum salt, the zirconyl sulfate and the lithium acetate, the early strength development capability of the accelerator under a low-temperature condition is improved.

The invention discloses a waste lithium iron phosphate battery recovery processing method, and belongs to the technical field of battery material recovery, the waste lithium iron phosphate battery recovery processing method comprises the following steps: (1) stirring and mixing a positive electrode material of a waste lithium iron phosphate battery, phosphoric acid, lithium monohydrogen phosphate and lithium dihydrogen phosphate in water to obtain a mixed solution; (2) adjusting the pH value of the mixed solution to be acidic, adding hydrogen peroxide, stirring, adding ferrite, and stirring to obtain slurry; (3) adding lithium acetate, vanadium nitrate, niobium pentoxide, polyacrylic acid or citric acid, carbon nanotubes and polytetrafluoroethylene emulsion into the slurry, stirring and mixing, dispersing, and drying to obtain a precursor; and (4) crushing the precursor, and then carrying out gradient calcination in a nitrogen-hydrogen mixed gas atmosphere to obtain the lithium iron phosphate material. The obtained lithium iron phosphate material can be directly used for preparing a lithium iron phosphate battery, and has high specific capacity and good cycle stability.

The application discloses a lithium acetate-polyethylene glycol mediated protoplast lipid nanoparticle delivery method and belongs to the technical field of biology. 2+ )concentration to improve the PEG formula, successfully delivers the lipid nanoparticle (LNP) to the protoplast of oil palm, coconut and other palm crops, the mRNA of the nanoparticle is wrapped with enhanced green fluorescent protein (eGFP), and the fluorescent protein can be directly expressed in the protoplast with the mRNA as a template without a promoter. After the LNP is delivered to the protoplast of the palm crops by the method, green fluorescent signals are detected by laser confocal microscopy. The method can be used for directly delivering target gene mRNA to the protoplast of the palm crops, and can also deliver CRISPR / Cas system protein and the like for gene editing technology research.

This invention discloses a low-temperature early-strength, low-viscosity liquid accelerator and its compounding and production process, relating to the field of concrete admixture technology. The accelerator is compounded from a basic skeleton component, a rheological stabilizing component, and a low-temperature early-strength component. The basic skeleton component includes an inorganic aluminum salt accelerator, anhydrous magnesium sulfate, diethanolamine, and water; the rheological stabilizing component includes liquid polyaluminum sulfate, an amphoteric internal salt viscosity reducer, and cationic nano-silica sol; the low-temperature early-strength component includes water-soluble organic aluminum salt, zirconium oxysulfate, lithium acetate, and water. This invention improves the rheological stability of the accelerator under low-temperature conditions through the combination of the amphoteric internal salt viscosity reducer and the cationic nano-silica sol; and improves the early strength development ability of the accelerator under low-temperature conditions through the combination of the water-soluble organic aluminum salt, zirconium oxysulfate, and lithium acetate.

The invention discloses a preparation method of a low-temperature fired infrared porous ceramic plate. The preparation method comprises the following steps: (1) preparing composite oxide powder; (2) preparing coating powder; (3) soaking the coated powder in an aqueous solution of lithium acetate, filtering, drying and calcining to obtain modified powder; and (4) uniformly mixing celsian powder, quartz powder, barium aluminum silicate powder, the composite oxide powder, the modified powder and sodium tripolyphosphate to obtain mixed powder, adding water to adjust the water content, pressing into a plate blank, drying, calcining, and cooling along with a furnace to obtain the infrared porous ceramic plate. The ceramic plate prepared by the method has good far infrared ray emissivity and strength, the application performance of the ceramic material in the aspects of decoration, heat preservation, air purification and the like is improved, and the durability of the ceramic is improved.

The invention discloses heat-resistant saccharomyces cerevisiae of a heterozygous human DNA methylation system as well as a construction method and application of the heat-resistant saccharomyces cerevisiae. The construction method comprises the following steps: determining a to-be-knocked-in saccharomyces cerevisiae target gene locus CAN1, and carrying out annular PCR amplification by taking a target sgRNA sequence as a homologous arm and an original gRNA plasmid as a template to obtain a gRNA plasmid; constructing a to-be-knocked-in gene segment, and transferring the constructed gRNA plasmid, the segment 1 and the segment 2 into BY4741-Cas9 saccharomycetes through a saccharomyces cerevisiae lithium acetate conversion method; the CRISPR plasmid is lost by adopting an iteration method to obtain a saccharomyces cerevisiae strain which is integrated into a genome and has DNA methylation modification, and the saccharomyces cerevisiae strain is named as yHL006. The invention constructs a saccharomyces cerevisiae chassis strain capable of stably expressing a DNA methylation system. Any auxotrophic selection marker is not occupied, and the complete amino acid synthesis capability and corresponding gene loci of the yeast are completely reserved. The heat stress resistance phenotype of the DNA methylation strain is verified, and the heat resistance of the yeast can be improved by the introduced DNA methylation system.

The application belongs to the technical field of novel green energy, and particularly discloses a kind of imitated honeycomb hydrogel, moisture power generation device and application, wherein the imitated honeycomb hydrogel is prepared by cross-linking sodium dodecyl benzene sulfonate, lithium acetate and acrylamide monomers at high temperature, the moisture power generation device comprises bottom electrode, imitated honeycomb hydrogel and top electrode from bottom to top.The imitated honeycomb hydrogel can absorb moisture in the environment and transfer ions during the power generation process through the interaction between hydrophilic groups and water molecules, and then absorb the energy generated by the phase change of water molecules to generate electric energy.The moisture power generator has high flexibility and high current density output.The complete imitated honeycomb hydrogel can be repeatedly bent to a large extent without being damaged, and the repeated bending at different angles shows its excellent mechanical strength, and electric energy can be generated at multiple bending angles, with the characteristics of no pollution, clean, sustainable, almost unlimited power generation conditions, etc.

The invention provides a piezoelectric composite material compositely integrated by high-performance piezoelectric conductive hydrogel and a biphase bone scaffold. The piezoelectric composite material is formed by compositing piezoelectric hydrogel, conductive hydrogel and a tricalcium phosphate / hydroxyapatite biphase scaffold, the piezoelectric hydrogel is formed by wrapping glycine nanofibers with a modified polymer; the conductive hydrogel is formed by complexing a polymer solution containing lithium acetate, borate ions and a hydroxyl compound. The pressure-responsive self-generating composite material which is high in conductivity, high in voltage, high in support and biodegradable is formed by integrating the pressure-conductive hydrogel and the biphase bone scaffold, construction of a composite hydrogel system which is high in voltage, high in conductivity, high in support strength and biodegradable is achieved, and the application requirement of a high-performance bone repair material system is met.

The invention relates to a construction method of a metallothionein yeast surface display engineering strain capable of efficiently enriching copper ions. According to the method, the metallothionein yeast surface display engineering strain is constructed based on a saccharomyces cerevisiae cell surface display technology. According to the method, a metallothionein gene CUP1 after codon optimization is connected to a saccharomyces cerevisiae expression vector pYD1 through the steps of double digestion, connection, transformation and the like, and a recombinant display plasmid pYD1-CUP1 is successfully constructed. A lithium acetate method is adopted to convert the recombinant display plasmid pYD1-CUP1 into tryptophan auxotroph saccharomyces cerevisiae EBY100, a plurality of recombinant transformants are obtained through MD plate screening, and screening and verification are carried out. The engineering yeast strain constructed by the method can improve the display efficiency of metallothionein on the surface of saccharomyces cerevisiae cells and enhance the enrichment capacity of the engineering strain on copper ions, so that inorganic copper is replaced by copper-enriched yeast, the side effect of copper is reduced, and the absorption and utilization rate of livestock and poultry on copper is improved.

This invention discloses LiMn 0.6 Fe 0.4 This research relates to PO4 / C, its preparation method, and its applications, belonging to the field of electrode material preparation technology. A LiMn... 0.6 Fe 0.4 The preparation method of PO4 / C is as follows: manganese acetate, ferrous sulfate, ammonium dihydrogen phosphate, lithium acetate, and citric acid are dissolved in water to prepare a suspension; the suspension is ball-milled to form a nanoscale dispersion to obtain a ball-milled suspension; the ball-milled suspension is subjected to a hydrothermal reaction to obtain LiMn. 0.6 Fe 0.4 PO4 / C. This invention uses low-cost manganese acetate, ferrous sulfate, ammonium dihydrogen phosphate, lithium acetate, and citric acid as raw materials. When prepared via a hydrothermal method, no surfactants such as PEG are required. The resulting LiMn... 0.6 Fe 0.4 PO4 / C has small particle size, large specific surface area and high stability.

The invention provides an LATP solid electrolyte, a preparation method and application thereof, and a solid-state battery. According to the preparation method of the LATP solid electrolyte, brand new soluble salts including titanyl sulfate, aluminum hydroxide, lithium acetate and ammonium dihydrogen phosphate are firstly and completely dispersed in water and then stably guided into a spray dryer through the characteristic of high dispersity of an aqueous solution, and a uniformly mixed precursor is separated out through continuous dehydration in the spray drying process, so that the LATP solid electrolyte is prepared. And carrying out high-temperature sintering to obtain the LATP electrolyte. The rapid synthesis method of the LATP solid electrolyte can be realized, the sanding time of the precursor can be greatly shortened, and the production cost is reduced.

The invention relates to the field of electronic materials, and particularly discloses a low-gradient zinc oxide varistor and a preparation method thereof. The invention relates to a low-gradient zinc oxide piezoresistor disc, which is prepared from the following raw materials in parts by weight: 88 to 96 parts of zinc oxide, 1.5 to 3 parts of antimony trioxide, 2 to 5 parts of bismuth trioxide, 0.2 to 1.8 parts of nickel oxide, 0.1 to 0.9 part of cobalt sesquioxide, 0.1 to 0.4 part of manganese oxide, 0.02 to 0.07 part of chromium sesquioxide, 0.15 to 0.18 part of lithium acetate, 1.2 to 1.8 parts of dispersing agents, 1.8 to 2.5 parts of binding agents, 0.12 to 0.15 part of aluminum nitrate and 0.001 to 0.003 part of silver nitrate. Under the synergistic effect of all the components, by adjusting the use ratio of all the components, the potential gradient of the resistor disc can be reduced, the large-current endurance capacity of the resistor disc is improved, and the change of electrical performance after impact is reduced.

The present invention discloses a modification method of a titanium-based lithium ion sieve, using a titanium source and a lithium source as basic raw materials, doping a modifier, wherein the modifier is selected from any one of sulfur powder, thiourea, urea, ammonium sulfide, hexamethylenetetramine, and selenium powder; a modified lithium metatitanate precursor is prepared by solid phase synthesis, sol-gel synthesis, or hydrothermal synthesis. The titanium source is selected from any one of titanium dioxide, industrial metatitanic acid, tetrabutyl titanate, titanium tetrachloride, isopropyl titanate, titanium sulfate, and titanium nitrate. The lithium source is selected from any one of lithium hydroxide, lithium chloride, lithium carbonate, lithium acetate dihydrate, lithium oxalate, lithium fluoride, lithium bromide, lithium nitrate, and lithium sulfate. The modification method of the present invention further improves the adsorption capacity and adsorption rate of the titanium-based lithium ion sieve by doping with non-metallic ions nitrogen, sulfur, or selenium.

The invention relates to a stable determination kit for a multi-parameter electrolyte analyzer. The stable determination kit comprises a solution A and a solution B, the solution A is prepared from the following components: 80 to 160 mmol / L of sodium chloride, 2 to 10 mmol / L of potassium chloride, 1 to 10 mmol / L of lithium acetate, 0.1 to 5 mmol / L of magnesium acetate, 0.1 to 4 mmol / L of anhydrous calcium chloride, 10 to 100 mmol / L of anhydrous sodium acetate, 50 to 100 mmol / L of buffer solution, 0.1 to 10 g / L of preservative, 0.1 to 10 g / L of stabilizer and 0.1 to 10 g / L of surfactant. The solution B is prepared from the following components: 10 to 100 mmol / L of sodium chloride, 2 to 10 mmol / L of potassium chloride, 1 to 10 mmol / L of lithium acetate, 0.1 to 5 mmol / L of magnesium acetate, 0.1 to 4 mmol / L of anhydrous calcium chloride, 10 to 100 mmol / L of anhydrous sodium acetate, 50 to 150 mmol / L of buffer solution, 0.1 to 10 g / L of preservative, 0.1 to 10 g / L of stabilizer and 0.1 to 10 g / L of surfactant. The content of K < + >, Na < + >, Cl <->, Ca < 2 + >, Li < + >, Mg < 2 + > and pH in a sample can be tested at the same time, the accuracy, repeatability and recovery rate are not affected when the sample is stored for 24 months at the temperature of 2-37 DEG C, and the raw materials are easy to obtain.

The application belongs to the technical field of electrode materials, and discloses an in-situ preparation method of a lithium iron phosphate-lithium-rich manganese-based dual-phase electrode material, which utilizes melamine, formaldehyde, ammonium polyphosphate and a mixture to prepare in-situ polymerization double-layer coated modified ammonium polyphosphate; after lithium hydroxide monohydrate is dissolved, glacial acetic acid and an aqueous solution of the in-situ polymerization double-layer coated modified ammonium polyphosphate are added and uniformly mixed to obtain a lithium acetate and ammonium polyphosphate mixed suspension; nano lithium-rich manganese-based compound powder and an organic carbon source are sequentially added to the mixed suspension of lithium acetate and ammonium polyphosphate to obtain organic carbon source coated lithium iron phosphate-lithium-rich manganese-based dual-phase precursor powder, and the powder is calcined; after inorganic carbon source and the obtained calcined product are uniformly mixed, a binder is added, and drying and pressing are performed to obtain the lithium iron phosphate-lithium-rich manganese-based dual-phase electrode material. The preparation method is simple, low in cost, high in efficiency, and the prepared lithium iron phosphate-lithium-rich manganese-based dual-phase electrode material has good water resistance.

This invention relates to the field of electrode materials technology, specifically to a method for preparing a manganese-rich precursor for cathode materials. The invention first synthesizes a manganese-nickel bimetallic organic framework using nickel acetate tetrahydrate and manganese acetate tetrahydrate as metal sources and 3,3',5,5'-biphenyltetracarboxylic acid and 2-aminoterephthalic acid as ligands. Then, through the action of a main complexing agent and a co-complexing agent, manganese acetate tetrahydrate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, and lithium acetate tetrahydrate are deposited on the surface of the manganese-nickel bimetallic organic framework to obtain the manganese-rich precursor for cathode materials. Lithium-ion batteries prepared using this manganese-rich precursor exhibit high coulombic efficiency, excellent cycle stability, and rate performance.

The invention provides a method for regenerating a lithium iron manganese phosphate positive electrode material and application of the lithium iron manganese phosphate positive electrode material. The method comprises the following steps: providing lithium manganese iron phosphate powder to be recycled; mixing the lithium manganese iron phosphate powder, tannic acid and lithium acetate, and carrying out hydrothermal reaction to obtain an intermediate for defect repair; mixing the defect-repaired intermediate, a lithium source, a manganese source, a phosphorus source, a carbon source and a doped metal oxide, and then performing post-treatment to obtain precursor microspheres; and sintering the precursor microspheres to obtain the regenerated lithium iron manganese phosphate positive electrode material. According to a synergistic regeneration mechanism of tannic acid and lithium acetate provided by the invention, accurate removal of surface impurities and in-situ repair of bulk phase lithium vacancies are synchronously realized, so that low-cost and low-energy-consumption regeneration of the waste lithium iron manganese phosphate positive electrode material is completed, and efficient repair of a microstructure is completed; finally, the regenerated lithium manganese iron phosphate positive electrode material with a stable structure and excellent electrochemical performance is obtained.

The application relates to the field of electronic materials, and particularly discloses a low-gradient zinc oxide varistor disc and a preparation method thereof; the low-gradient zinc oxide varistor disc comprises the following raw materials in parts by weight: 88-96 parts of zinc oxide, 1.5-3 parts of diantimony trioxide, 2-5 parts of bismuth trioxide, 0.2-1.8 parts of nickel oxide, 0.1-0.9 parts of cobalt trioxide, 0.1-0.4 parts of manganese oxide, 0.02-0.07 parts of chromium trioxide, 0.15-0.18 parts of lithium acetate, 1.2-1.8 parts of a dispersing agent, 1.8-2.5 parts of a binding agent, 0.12-0.15 parts of aluminum nitrate and 0.001-0.003 parts of silver nitrate; under the synergistic action of the components, the use ratio of the components is adjusted, the potential gradient of the varistor disc is reduced, the large-current resistance of the varistor disc is improved, and the change of the electrical performance after impact is reduced.

The application relates to the technical field of energy storage and conversion materials, and particularly relates to a preparation method of a sodium-based double-ion battery composite positive electrode material with super-high rate capability, which comprises the following steps: S1: taking tetrabutyl titanate as a Ti source, uniformly mixing the tetrabutyl titanate with graphite powder, and placing the mixture in anhydrous ethanol to obtain a solid-liquid mixture; S2: continuously stirring the solid-liquid mixture in a water bath pot magnetic stirrer until the anhydrous ethanol is completely evaporated to obtain a sample; S3: uniformly mixing the sample with a certain proportion of a lithium source (one of lithium hydroxide monohydrate, lithium acetate, lithium carbonate or lithium oxalate) to obtain a mixed sample; and S4: heating and keeping warm of the sample under an inert protective atmosphere to obtain a sodium-based graphite double-ion battery composite positive electrode material coated with Li2TiO3. The sodium-based graphite double-ion battery composite positive electrode material coated with Li2TiO3 provided by the application has excellent rate capability, can realize stable cycle of 100C super-high rate charging and discharging, and specifically can realize 86% of fast charging and discharging capacity in 36s.

A method for constructing a lithium-rich manganese cathode material with an amorphous protective layer and a locally spinel-disordered phase periodically alternating composite structure involves adding lithium acetate, nickel acetate, cobalt acetate, manganese acetate, and citric acid monohydrate complexing agent to deionized water and mixing thoroughly. Then, aminosulfonic acid is added and stirred until homogeneous, yielding a precursor salt solution. The precursor salt solution is then subjected to spray pyrolysis to prepare precursor powder. Finally, the precursor powder is calcined at high temperature in a muffle furnace to obtain modified lithium-rich manganese-based cathode material powder. The advantages are: this method helps reduce side reactions during cycling and improves the efficiency of lithium-rich manganese cathode materials. + Improving the diffusion rate and suppressing harmful phase transitions during cycling can significantly enhance the stability of materials, slow down voltage decay, and improve cycling performance and voltage retention.

The invention relates to the technical field of electrode materials, in particular to a preparation method of a manganese-rich precursor for a positive electrode material. According to the invention, nickel acetate tetrahydrate and manganese acetate tetrahydrate are taken as metal sources, 3, 3 ', 5, 5'-biphenyltetracarboxylic acid and 2-aminoterephthalic acid are taken as ligands, a manganese-nickel bimetal organic framework is synthesized, and the manganese-nickel bimetal organic framework is synthesized under the action of a main complexing agent and an auxiliary complexing agent. And depositing manganese acetate tetrahydrate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate and lithium acetate tetrahydrate on the surface of the manganese-nickel bimetal organic framework to obtain the manganese-rich precursor for the positive electrode material. The lithium ion battery prepared from the manganese-rich precursor has relatively high coulombic efficiency and excellent cycling stability and rate capability.

The invention discloses LiMn0. 6Fe0. 4PO4 / C as well as a preparation method and application thereof, and belongs to the technical field of electrode material preparation. The invention relates to a preparation method of LiMn0. 6Fe0. 4PO4 / C. The preparation method comprises the following steps: dissolving manganese acetate, ferrous sulfate, ammonium dihydrogen phosphate, lithium acetate and citric acid in water to prepare a suspension; carrying out ball-milling treatment on the turbid liquid to form nanoscale dispersion to obtain a turbid liquid after ball-milling; and carrying out hydrothermal reaction on the turbid liquid after ball milling to obtain LiMn < 0.6 > Fe < 0.4 > PO4 / C. According to the preparation method, low-cost manganese acetate, ferrous sulfate, ammonium dihydrogen phosphate, lithium acetate and citric acid are taken as raw materials, when a hydrothermal method is adopted for preparation, surfactants such as PEG do not need to be added for assistance, and the prepared LiMn0. 6Fe0. 4PO4 / C is small in particle size, large in specific surface area and high in stability.

The invention discloses a construction method of a saccharomyces cerevisiae surface display engineering strain for efficiently expressing aflatoxin oxidase, which is characterized in that an aflatoxin oxidase gene Afo after codon optimization is connected to a saccharomyces cerevisiae expression vector pYD1 through the steps of double enzyme digestion, connection, transformation and the like, and a recombinant display plasmid pYD1-Afo is successfully constructed. A lithium acetate method is adopted to convert the recombinant display plasmid pYD1-Afo into tryptophan auxotroph saccharomyces cerevisiae EBY100, a plurality of recombinant transformants are obtained through MD plate screening, and screening and verification are carried out. And determining the whole-cell enzyme activity of the recombinant strain with the aflatoxin oxidase displayed on the surface by using enzyme-linked immunosorbent assay, and screening out the strain with high enzyme activity. The engineering yeast strain constructed by the method not only can obviously improve the detoxification efficiency, but also can reduce the cost and the pollution to the environment.

The application discloses a method for preparing trifluoromethyl and amino substituted 1,2,4-triazole compounds, which comprises the following steps: adding palladium acetate, lithium acetate, trifluoroethyl imine hydrazide and isocyanide into an organic solvent, and stirring at 90-110 o C for 8-16 hours, and after the reaction is completed, post-treatment is performed to obtain the trifluoromethyl and amino substituted 1,2,4-triazole compounds. The preparation method is simple in operation, the starting material is cheap and easy to obtain, the amount of the palladium acetate catalyst is small, the reaction is carried out in an air atmosphere, no anhydrous and anaerobic operation is needed, the reaction can be scaled up to a gram level, and the application of the method is widened.

The invention belongs to the technical field of batteries, and particularly relates to a method for regulating and controlling reconstruction of spinel on the surface of a lithium-rich manganese oxide positive electrode material and application. The chemical formula of the lithium-rich manganese oxide positive electrode material is Li1. 2Ni0. 132Co0. 172Mn0. 492 O2. The preparation method comprises the following steps: firstly, mixing lithium acetate dihydrate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, manganese acetate tetrahydrate, ammonium fluoride and citric acid monohydrate, adding the mixture into deionized water to prepare a precursor solution, and then preparing the ammonium fluoride modified lithium-rich manganese-based positive electrode material in one step by utilizing a spray drying method. The original structure is not damaged, the peak of (003) moves towards the low-angle direction, the interlayer spacing of the crystal face of (003) is enlarged, meanwhile, the particle size can be reduced, the content of specific spinel on the surface can be regulated and controlled, and lithium ion transportation is facilitated. The first discharge specific capacity of the lithium-rich manganese oxide positive electrode material prepared by the method is up to 289.77 mAh / g under the current density of 20 mA / g, and the capacity retention rate is up to 81.84% after 300 cycles under the current density of 200 mA / g.

The application provides a LATP solid electrolyte, a preparation method and application thereof, and a solid-state battery. The preparation method of the LATP solid electrolyte is characterized by using new soluble salts, titanyl sulfate, aluminum hydroxide, lithium acetate and ammonium dihydrogen phosphate, which are completely dispersed in water, and then introduced into a spray dryer through the high dispersibility of the aqueous solution, and continuously dehydrated and precipitated in the spray drying process to obtain a mixed precursor, and then sintered at high temperature to obtain the LATP electrolyte. The application can realize the rapid synthesis of the LATP solid electrolyte, greatly reduce the sanding time of the precursor, and reduce the production cost.