125 results about "Desolvation" patented technology

The invention relates to a continuous production process and device of vinylene carbonate, chloroethylene carbonate, tertiary amine and a solvent are continuously fed in a reactor for dechlorination reaction, and temperature is controlled by a tubular heat exchanger; the reaction liquid continuously overflows from a side overflow port to enter a middle receiving tank, a vinylene carbonate crude product is obtained after desolvation, the vinylene carbonate crude product enters a melt crystallizer for melt crystallization after being purified by a low-component removal tower, a high-component removal tower and a rectifying tower, and a vinylene carbonate product with the purity of 99.99% or above is obtained; a reaction by-product tertiary amine hydrochloride settles to the lower part of the reactor, is discharged from the bottom of the reactor after being subjected to countercurrent washing by inputting a solvent through a salt leaching cavity, enters a neutralization kettle, is neutralized by liquid caustic soda and then is subjected to liquid separation, an organic phase enters a recovery system to be dehydrated, and then sequentially passes through a solvent recovery tower to recover the solvent and a tertiary amine recovery tower to recover tertiary amine; and the solvent and the tertiary amine can be recycled. The continuous production of the vinylene carbonate is realized, the consumption of raw materials is reduced, and the yield and the production efficiency are improved.

The invention provides a low-temperature sodium-ion battery containing a modified negative electrode as well as a preparation method and application of the low-temperature sodium-ion battery. The low-temperature sodium-ion battery comprises a positive electrode, a negative electrode and an electrolyte, the negative electrode comprises negative electrode slurry, and the negative electrode slurry comprises an active substance, conductive carbon, sodium carboxymethyl cellulose and butadiene styrene rubber; the active substance comprises modified hard carbon; the modified hard carbon is prepared by oscillating and mixing hard carbon with a single-walled carbon nanotube, graphite carbon and soft carbon to obtain physical coating, further oscillating and mixing with the doped modified precursor powder, and calcining at high temperature to complete element doping and chemical coating; and the electrolyte comprises an additive selected from trimethylsilyl nicotinate, methyl 4-hydroxy-3-methoxycinnamate and the like. On one hand, the adhesive force of the negative electrode slurry on the current collector is improved, on the other hand, the solvent formula is optimized, the desolvation ability of sodium ions in the electrolyte is improved, the viscosity is reduced, and the additive is added to modify an electrode surface interface film, so that the charge-discharge performance of the battery at low temperature is improved.

The invention discloses an electrolyte suitable for high-rate charge-discharge and low-temperature circulation and a lithium metal battery, and belongs to the technical field of lithium batteries. The electrolyte comprises the lithium salt, the additive and the cosolvent mixture, the cosolvent mixture is composed of the methyl acetate, the methyl difluoroacetate and the fluoroethylene carbonate, and due to the synergistic effect of a mixed solvent system, the electrolyte can have high high voltage resistance and oxidation resistance; meanwhile, a low-impedance electrode electrolyte phase interfacial film rich in inorganic matter LiF can be formed, rapid desolvation of Li < + > is promoted, the rate capability and the low-temperature performance of the battery are further remarkably improved, and the battery can also normally work at the high rate of-30 DEG C and 2C. The preparation raw materials of the electrolyte are cheap and easy to obtain, the preparation process is simple and convenient, and a thought is provided for industrial production of the low-temperature electrolyte.

The invention discloses a method for accurately measuring trace calcium in high-purity magnesium metal by combining membrane desolvation and triple quadrupole mass spectrometry, which comprises the following steps: (1) sequentially adding water to wet a high-purity magnesium sample and adding acid to dissolve the sample to obtain a digestion solution, and adding an internal standard solution into the digestion solution; (2) preparing calcium element solutions with multiple concentration gradients, adding the internal standard solution, fixing the volume, and shaking uniformly; (3) sequentially carrying out atomization treatment and membrane desolvation treatment on the prepared solution to respectively obtain dry aerosol of the to-be-detected solution and the standard solution; and (4) carrying out scanning determination on the dry aerosol of the solution to be detected and the standard solution in the step (3) by using a triple quadrupole mass spectrometer, and calculating to obtain the calcium content in the high-purity magnesium sample. According to the method, the 24Mg16O polyatomic interference brought by the matrix element and the mass spectrum interference of the working gas Ar on the to-be-detected element 40Ca are removed through membrane desolvation and triple quadrupole mass spectrometry, so that the trace calcium element in the high-purity magnesium sample can be accurately determined, and the lower determination limit can reach ppb level.

The invention provides a non-aqueous electrolyte and a lithium ion battery. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive. The additive comprises a compound A as shown in a structural formula I; wherein R1 and R2 are respectively and independently selected from oxygen, sulfur or NR5, R3 and R4 are respectively and independently selected from NR6R7, R5 is C1-C5 alkyl silicon group, and R6 and R7 are respectively and independently selected from C1-C5 alkyl silicon group, C1-C5 alkyl group, substituted C1-C5 alkyl group, phenyl or substituted phenyl. The compound A comprises a cyclic (oxygen, sulfur and nitrogen) phosphamide structure and a trimethylsilyl structure, the trimethylsilyl structure can remove moisture in the electrolyte, and the cyclic (oxygen, sulfur and nitrogen) phosphamide structure is reduced on a negative electrode interface to form a polar solid electrolyte interface film of lithium salt containing oxygen or sulfur and phosphorus and nitrogen; the interfacial film has good lithium ion conductivity and toughness, the charge transfer resistance of the lithium ion battery is reduced, desolvation of lithium ions is promoted, and the high-rate cycle performance of the lithium ion battery is improved. The structural formula I of the # imgabs0 # is shown in the specification.

The invention relates to the field of new energy materials, and discloses a high-rate low-temperature-resistant electrolyte adaptive to a high-density polyphenylene sulfide solid diaphragm, a preparation method and a lithium battery, and an organic solvent of the electrolyte comprises acyclic carbonate, cyclic carbonate, a cosolvent and a film-forming additive. The cosolvent is linear ester of which the freezing point is lower than-40 DEG C; the acyclic carbonate which can generate weak dipole adsorption or repulsive interaction with the surface of high-crystallization polyphenylene sulfide is selected as the acyclic carbonate, and the solvent can form a solvation cluster with Li < + > in the electrolyte and can accelerate Li < + > desolvation on the surface of the PPS solid diaphragm, so that Li < + > smoothly passes through a sulfur channel, and the rate capability of the battery is improved; the linear ester with low freezing point makes up the defect that the freezing point of cyclic carbonate and acyclic carbonate is too high, so that the battery can normally work at-20 DEG C, and the low-temperature performance of the electrolyte is improved. By adding the film-forming additive, the safety of the battery is improved, and the cycle life of the battery is prolonged.

An electrolyte for a sodium-ion secondary battery, a sodium-ion secondary battery, and an electric apparatus. The electrolyte for the sodium-ion secondary battery comprises a metal sodium salt and a solvent, wherein the desolvation energy of a sodium ion-solvent complex formed by sodium ions of the metal sodium salt and the solvent is less than or equal kJ / mol. In this way, the reaction kinetics of the sodium-ion secondary battery at a low temperature can be improved, and the low-temperature performance of the sodium-ion secondary battery is improved.

The invention provides a preparation method of diphenyl ethyoxyl phosphine and a product thereof. Taking diphenyl phosphonium chloride and absolute ethyl alcohol as raw materials, petroleum ether as a solvent and triethylamine as an acid-binding agent; the reaction process comprises the following steps: reacting diphenyl phosphine chloride with ethanol to generate diphenyl ethyoxyl phosphine and hydrogen chloride, and reacting hydrogen chloride with triethylamine to generate triethylamine hydrochloride. And after the reaction is finished, separating triethylamine hydrochloride separated by crystallization from the liquid organic phase through centrifugation, taking the obtained triethylamine hydrochloride as a co-product, carrying out desolvation treatment on the obtained liquid organic phase to obtain a diphenylethoxyphosphine crude product, and rectifying to obtain the high-quality diphenylethoxyphosphine. The preparation process provided by the invention is mild in reaction condition, simple and convenient to operate and low in requirements on equipment and energy consumption; the raw materials are wide in source and low in cost, and the solvent and the acid-binding agent can be recycled, so that the method has the advantage of environmental protection. The prepared diphenyl ethyoxyl phosphine is high in purity and good in yield, and has a wide industrial application prospect.

The invention relates to the technical field of zinc metal battery negative electrodes, in particular to a preparation method of a zinc metal battery negative electrode protective layer capable of regulating and controlling double electric layers, which comprises the following steps: pre-roasting commercial diatomite at a certain temperature, immersing into an alkali solution, fully stirring for reaction, washing to be neutral, and drying; roasting the dried diatomite again, removing impurities and residual alkali, and sieving for later use; fully mixing the treated diatomite with a binder polyvinylidene fluoride and a conductive agent Super-P, and adjusting the concentration of the slurry by using a solvent N-methyl pyrrolidone; constructing the slurry on a zinc foil in a spin coating manner to obtain a zinc metal battery negative electrode; the zinc metal battery negative electrode protective layer is provided with micron / nano holes serving as zinc ion migration channels, in addition, polar bonds, namely Si-O bonds and holes, constructed by a diatomite roasting and alkali treatment process can synergistically adjust a double electrode layer on the surface of a zinc negative electrode, so that the zinc ion desolvation process is accelerated, and the cycle life is greatly prolonged. The preparation process is extremely low in cost and suitable for large-scale production.

The present invention provides a method for identifying Euryale ferox Salisb. and stir-fried Euryale ferox Salisb. and its application. The identification method includes the following steps: (1) Mix the sample to be tested with a solvent for reflux extraction, collect the filtrate, mix it with an organic solution and let it stand still. Then take the supernatant for desolvation, dissolve the residue with an organic solution and filter it to obtain the test solution A; (2) Perform liquid chromatography detection on the test solution A obtained in step (1), compare the detection result with the characteristic chromatogram, and judge whether the sample to be tested is Euryale ferox Salisb. or stir-fried Euryale ferox Salisb. The identification method provided by the present invention for Euryale ferox Salisb. and stir-fried Euryale ferox Salisb. has high accuracy and strong characteristics, and is of great significance for the quality control of clinical Euryale ferox Salisb. and stir-fried Euryale ferox Salisb. decoction pieces.

The invention relates to the technical field of negative-electrode-free lithium batteries, in particular to a composite modification layer for a negative electrode current collector and a preparation method and application of the composite modification layer. The composite modification layer for the negative electrode current collector is prepared by the following steps: carrying out pre-lithiation treatment on montmorillonite by utilizing lithium salt and oxalic acid to obtain a first solution; performing pre-lithiation treatment on polystyrolsulfon acid by using lithium hydroxide, and mixing with an alcohol solvent to obtain a second solution; uniformly mixing the first solution and the second solution to obtain a mixed solution; and performing planar two-dimensional spraying on the surface of the negative electrode substrate by using the mixed solution, and after drying, forming a composite modification layer on the surface of the negative electrode substrate. The preparation method solves the problems that solvent molecules of a traditional modification layer are gathered due to polar groups, the desolvation process is hindered, SEI rich in organic matter is formed, and transmission of lithium ions on the surface of the modification layer is hindered.

The invention belongs to the technical field of sodium secondary batteries, and particularly relates to a sodium battery electrolyte and a sodium metal / negative-electrode-free sodium battery, the sodium battery electrolyte comprises the following components: a sodium salt and an ether solvent; the ether solvent is a multi-chain ether solvent or a cyclic ether solvent; wherein the multi-chain ether solvent is chain ether containing a branched chain; according to the invention, the multi-chain ether solvent or the cyclic ether solvent is introduced, and the ability of the multi-chain ether solvent or the cyclic ether solvent to form a multipoint coordination configuration with sodium ions can be hindered on the basis that branched chains in the multi-chain ether and a cyclic structure of the cyclic ether have a relatively large steric hindrance effect, so that the dissociation degree of the sodium salt is slightly reduced, and the dissociation efficiency of the sodium salt is improved. According to the present invention, the sodium ion desolvation difficulty is significantly reduced, the sodium ion rapid desolvation is achieved, and particularly the desolvation advantage in the low temperature environment of-70-60 DEG C is significant, such that the efficient reversible deposition-stripping of the sodium metal at the low temperature is achieved, the formation of the sodium dendrite is avoided, and the application of the sodium metal battery under different environmental conditions is improved.

The invention discloses an artificial SEI material and a preparation method and application thereof, and a battery rate capability evaluation method, the artificial SEI material comprises a polymer, the polymer is formed by polymerizing at least one cyclic carbonate monomer and at least one hydrophobic solvent type monomer, and the ionic conductivity of the artificial SEI material is 3 * 10 <-5 > S / cm to 7.2 * 10 <-5 > S / cm. The artificial SEI material is prepared by carrying out polymerization reaction on a cyclic carbonate monomer and a hydrophobic solvent type monomer. The high-polarity carbonyl functional group in the cyclic carbonate unit can selectively react with lithium ions, so that a solvation sheath is weakened, a desolvation energy barrier is reduced, and the transmission efficiency of the lithium ions is improved. And the hydrophobic solvent type monomer unit forms a polymer skeleton which is insoluble in the electrolyte, so that the chemical stability is ensured. The copolymer has high ionic conductivity and structural stability, and provides a material basis for improving the fast charging performance of the lithium ion battery.

The invention relates to a novel method for synthesizing dichloropyridazinone, which is characterized in that the pyridazinone is generated through the reaction of tert-butylhydrazine and furfuryl acid under the condition of a non-water-soluble organic solvent by changing the initial raw materials of the reaction, the reaction product acetic acid can be recycled, and the reaction solvent and the subsequent synthesis of pyridaben are the same solvent, so that the desolvation process and the crystallization process are omitted, and the yield is improved. The method avoids high-temperature decomposition of a heat-sensitive material intermediate dichloropyridazinone, greatly improves the production field environment, effectively improves the comprehensive yield of a finished product, and is more suitable for industrial production.

The present application relates to the field of pesticide chemical industry technology, and discloses a post-treatment method for a saflufenacil-containing reaction solution. The post-treatment method includes the following steps: (1) after phase separation of a saflufenacil-containing reaction solution, performing desolvation treatment on an organic phase, and then adding a first organic solvent for stirring; (2) after the stirring is completed, performing filtration, leaching an obtained filter cake with a second organic solvent, and obtaining saflufenacil after drying. The post-treatment method provided by the present application can simply and efficiently treat the saflufenacil-containing reaction solution, with a product yield of over 90% and a content of about 98%.

In order to solve the problems that the high-temperature cycle life and the low-temperature cycle life of the battery are short due to the fact that an electrolyte used by an existing lithium metal battery contains a strong-strong solvent pair or a strong-anti-solvent pair in LHCE, the invention provides a high and low temperature resistant electrolyte and a lithium metal battery. The high and low temperature resistant electrolyte comprises an organic solvent, the organic solvent comprises a strong solvating solvent and a weak solvating solvent, the weak solvating solvent is 4-methyl-1, 3-dioxane, and the strong solvating solvent is ethylene glycol dimethyl ether. At low temperature, due to the dipole interaction of MeDX-DME, a layered solvation structure is formed, and the interaction of Li < + >-DME is weakened, so that the Li < + > desolvation energy is reduced, the Li < + > transmission kinetics is increased, and the low-temperature cycle life of the battery is prolonged; and at high temperature, due to the dipole interaction of MeDX-DME, a layered solvation structure is formed, so that the ring-opening reaction of MeDX is slowed down, the generation of side reactions is reduced, the high-temperature stability of the electrolyte is improved, and the high-temperature cycle life of the battery is prolonged.

A heating device and a mass spectrometry device of a nanoelectrospray source, the heating device comprising: a support body and a heating body arranged on the support body, the heating body being configured to apply a heating effect to an ion transmission path and being provided with an ion transmission channel for the passage of ions or charged droplets; an ion inlet of the ion transmission channel corresponding to an ion outlet of the nanoelectrospray source, and an ion outlet of the ion transmission channel corresponding to an ion inlet of the mass spectrometer. The heating device can significantly improve the atomization and desolvation capability of the nanoelectrospray source, improve the signal response and repeatability, reduce the ion cluster background noise formed by solvent molecules, improve the sensitivity, and avoid the spray stop and signal loss caused by the heat-sensitive drying of the nanoelectrospray ion source at the end of the spray needle.

The invention discloses a novel sodium ion low-temperature electrolyte and a sodium ion battery, and relates to the technical field of sodium ion batteries. The non-polar cosolvent is used as a first component of the electrolyte, the non-polar cosolvent is used for reducing a desolvation energy barrier of sodium ions, the ether solvent is used as a second component of the electrolyte, the ether solvent is used for providing a wider liquid temperature range and higher low-temperature ionic conductivity, and the sodium salt is used for providing cations in the electrolyte, so that the electrolyte is more stable in performance. The non-polar solvent is dichloromethane. According to the invention, dichloromethane is introduced as a non-polar eutectic base, the dichloromethane has weak solvation ability to sodium ions, the desolvation energy barrier of the sodium ions can be reduced, the reductive decomposition product of DCM may participate in formation of an inorganic interface layer rich in NaCl, and the mechanical stability and ionic conductivity of SEI are improved; therefore, the charge-discharge cycle capacity retention ratio of the battery in a low-temperature environment is improved.

A preparation process of 5-ethylidene-2-norbornene, including: introducing dicyclopentadiene into a dicyclopentadiene decomposition reactor to thermally decompose the dicyclopentadiene; introducing a product of the above step into a cyclopentadiene purification tower; introducing 1,3-butadiene, a solvent, and cyclopentadiene separated from the top of the cyclopentadiene purification tower into a Diels-Alder reactor to react the same; introducing a product of the immediate above step into a 1,3-butadiene removal tower to recover 1,3-butadiene from the top; introducing a mixture at the bottom of the 1,3-butadiene removal tower into a desolvation tower, and recycling a solvent and unreacted raw materials recovered from the top of the desolvation tower to the dicyclopentadiene decomposition reactor; introducing a mixture at the bottom of the desolvation tower into a 5-vinyl-2-norbornene separation tower to separate 5-vinyl-2-norbornene; and introducing the 5-vinyl-2-norbornene into an isomerization reactor to react the same.

The invention relates to the technical field of crystal structure prediction, and discloses a quantum algorithm-based energetic CxNyOz crystal structure prediction method, which comprises the following steps of: calculating an evaporation and diffusion dimensionless number and capillary pressure by obtaining surface tension, a contact angle, a geometric feature scale, temperature, partial pressure, a diffusion coefficient and an evaporation rate; establishing a residual solvent mole fraction and solvent chemical potential sequence; constructing a binary layer occupancy model Hamiltonian containing layer occupancy energy, adjacent layer action energy, a capillary pressure volume term and a molecular polarity action term, and obtaining a hierarchical occupancy number by using a quantum approximation optimization algorithm; calculating interlayer respiration and shear frequency and mode volume sensitivity based on a quantum variation algorithm; and finally, the lattice spacing and the prediction result are obtained through cost functional minimization, and accurate prediction and quantitative analysis of the structure of the energetic crystal under the unbalanced desolvation condition are realized.

The invention belongs to the field of mass spectrometric detection, and provides a mass spectrometric detection chip preparation system and method. The system comprises an ion generation module, a solvent removal transmission module and an ion landing module, and sample transmission lines among the three modules are on the same straight line; the ion generation module is used for generating charged sample liquid drops, and the charged sample liquid drops enter the solvent removal and transmission module under the combined action of a first electric field and a first airflow channel; the solvent removal and transmission module is used for carrying out desolvation operation on the charged sample liquid drops to obtain charged sample molecules; and the charged sample molecules land on a target plate of the ion landing module under the combined action of the second electric field and the second airflow channel. The system has the advantages of being convenient to operate, simple in working mode switching, high in ion transmission efficiency, low in sample consumption and the like, and various types of mass spectrum detection chips can be prepared.

The invention relates to preparation and application of an adsorption material and device for alkane substances released by flowering of plants and a perfuming material. Attapulgite powder which is low in cost and easy to obtain is selected as an adsorption material for C12-C17 intermediate alkane emitted during flowering of plants, and rotary evaporation is performed for 10-20 h under the conditions that the temperature is 50-70 DEG C and the pressure is-0.12--0.08 MPa, so that micropores and spaces are increased, and the adsorption efficiency is improved. The material can be directly applied after adsorption, procedures of elution, concentration and desolvation of solvents such as ethanol are omitted, efficiency is improved, pollution is reduced, resources are saved, and more intermediate alkane substances are reserved. In addition, three application modes are found in cigarettes, the effect is clear, the cigarette quality can be improved, and high-value utilization of plant resources is achieved.

The invention provides a preparation method of a CPAN-coated ZnO layer, which comprises the following steps: sequentially dissolving PAN, zinc salt, elemental sulfur or metal sulfide in an organic solvent, and then carrying out electrostatic spinning and annealing to prepare the CPAN-coated ZnO layer. Through compounding of PAN, zinc salt and elemental sulfur or metal sulfide, electrostatic spinning is combined with annealing, the CPAN-coated ZnO layer capable of inhibiting dendritic crystal growth, promoting lithium desolvation and inducing uniform deposition of lithium is obtained, after the CPAN-coated ZnO layer prepared by the scheme is used for a battery, the battery dynamic performance (the lithium ion transference number is 0.5-0.8, the lithium ion desolvation rate is 0.5-0.8, the lithium ion desolvation rate is 0.5-0.8, the lithium ion desolvation rate is 0.5-0.8, and the lithium ion desolvation rate is 0.5-0.8) is high. The interface exchange current density is 0.5 mAcm <-2 > to 1.5 mAcm <-2 >; and the cycle life is effectively prolonged.

The invention provides a continuous forming and gradient flooding method and device for a spherical energetic material. The method comprises the following steps: forming liquid medicine into uniform micro-drops through a micro-channel device, and sequentially feeding the uniform micro-drops into three stirring kettles which are connected in series: curing and forming in a first stirring kettle at 5-25 DEG C, overflowing into a second stirring kettle, carrying out low-temperature flooding at 40-60 DEG C so as to remove more than 80% of solvent, overflowing into a third stirring kettle, and completing high-temperature deep flooding at 70-90 DEG C, and finally cooling to room temperature through a cooling device. And the three stirring kettles realize continuous transfer through an overflow structure, and manual intervention is not needed. The device comprises a metering pump, a micro-channel device, three stirring kettles connected in series and a cooling device. Through the gradient strategy of low-temperature pre-desolvation and high-temperature deep desolvation, the contradiction between particle softening deformation and solvent residue in the traditional process is solved, the particle size distribution deviation of the spherical energetic material is smaller than or equal to 5%, the deformation rate is smaller than or equal to 2%, the solvent residue is smaller than or equal to 50 ppm, the production continuity is improved by 40% or above, and the method is particularly suitable for continuous production of temperature-sensitive energetic drugs.

The invention discloses a linear ether and cyclic ether mixed electrolyte for a wide-temperature-range sodium-ion battery as well as a preparation method and application of the linear ether and cyclic ether mixed electrolyte, and relates to a wide-temperature-range electrolyte as well as a preparation method and application of the wide-temperature-range electrolyte. The invention discloses a linear ether and cyclic ether mixed electrolyte for a wide-temperature-range sodium-ion battery. The linear ether and cyclic ether mixed electrolyte comprises sodium salt and an ether-based solvent, the sodium salt is sodium trifluoromethanesulfonate; the ether-based solvent is a mixed solution of straight-chain ether and cyclic ether; the straight-chain ether is diethylene glycol dimethyl ether; the cyclic ether is tetrahydrofuran or dimethyl tetrahydrofuran. The straight-chain ether and cyclic ether mixed electrolyte of the wide-temperature-range sodium-ion battery provided by the invention has a low freezing point, low viscosity, high ionic conductivity and high sodium ion transference number in a wide temperature range, and low desolvation energy, and can reduce the interface charge transfer impedance of an electrode-electrolyte, so that the performance of the battery is improved. Sodium ions can be quickly embedded and separated when reaching the electrode, so that the wide-temperature-range performance of the sodium ion battery is improved, and the sodium ion battery has excellent wide-temperature-range charge-discharge specific capacity, cycling stability and high-rate performance.

The embodiment of the invention discloses an electrolyte, a battery and an electric device. The electrolyte includes an aprotic organic solvent and an alkali metal salt dissolved therein, the aprotic organic solvent including: a cyclic ester that imparts excellent thermal stability and chemical stability with low ring tension and a stable conjugated structure; straight-chain ether is used for reducing the viscosity of the system and promoting ion transmission; and the weak coordination characteristic of the low-donor-number solvent (DN is less than or equal to 18) promotes more anions to enter a first solvation sheath of Li < + >, so that an anion-dominated solvation structure is formed, the desolvation energy barrier of lithium ions on an electrode interface is reduced, charge transfer is accelerated, and electrochemical polarization is reduced. The solvated structure induces to form a compact and stable SEI film rich in LiF and other high-ionic-conductivity inorganic components at the same time, side reaction is inhibited, deposition / dissolution kinetics of vanadium ions is synergistically improved, and lagging voltage reduction and overall electrochemical stability improvement are finally achieved by synergistically reducing interface impedance in the battery discharging process.

The invention provides a preparation method of a triazine ultraviolet light absorber 2, 4-bis (2, 4-dimethylphenyl)-6-(2-hydroxy-4-n-octyloxophenyl)-1, 3, 5-triazine, the preparation method comprises the following steps: 2-(2, 4-dihydroxyphenyl)-4, 6-bis (2, 4-dimethylphenyl)-S-triazine and 1-chloro-n-octane are used as raw materials for reaction preparation, before the reaction is carried out, the 2, 4-dihydroxyphenyl)-4, 6-bis (2, 4-dimethylphenyl)-S-triazine and 1-chloro-n-octane are added into the reaction kettle, and the reaction kettle is used for reaction to prepare the triazine ultraviolet light absorber 2, 4-bis (2, 4-dimethylphenyl)-6-(2, 4 the reaction system is desolventized in advance, and the moisture content is controlled to be 500 ppm or below; according to the preparation method disclosed by the invention, the moisture in the system is firstly removed by desolventizing in advance, so that the yield of the ultraviolet light absorber 2, 4-bis (2, 4-dimethylphenyl)-6-(2-hydroxy-4-n-octyl oxo phenyl)-1, 3, 5-triazine is effectively improved.

The invention relates to the technical field of zinc ion batteries, and discloses a preparation method of a flexible zinc ion battery, which comprises the following steps: step 1, preparing a mixed solvent of N, N-dimethylacetamide and lithium chloride, and dissolving a biomass material in the mixed solvent to form a viscous solution; 2, respectively coating the viscous solution on the surfaces of a zinc positive electrode and a manganese dioxide negative electrode, assembling into a battery structure, injecting an electrolyte, and triggering in-situ gelation of a substance material; and step 3, packaging the gelated battery to obtain the flexible zinc ion battery. According to the invention, a seamless electrode-diaphragm interface is realized, and non-uniform ion current distribution is eliminated; self-assembled double-layer SE I (the inner layer accelerates Zn < 2 + > desolvation and blocks electron tunneling, and the cellulose outer layer anchors water molecules to inhibit SE I dissolution); a positive electrode stable layer (hydrogel mediation inhibits MnO2 dissolution); the interface bonding between the in-situ formed gel electrolyte and the electrode is good, and the structural stability of the flexible battery under different deformations can be guaranteed.

The invention relates to the technical field of electrochemical energy accumulators, in particular to a functional diaphragm for prolonging the cycle life of a sodium metal non-cathode battery and a preparation method thereof.The functional diaphragm comprises a base membrane and a functional coating coated on the surface of the base membrane, and the functional coating comprises an A-face coating and a B-face coating which are distributed on the two sides of the base membrane; the A-surface coating comprises a lamellar fast sodium ion material and a solvent, and the B-surface coating comprises a lamellar fast sodium ion material, a high-molecular polymer and a solvent. The coating layers with different functions are constructed on the two sides of the diaphragm to synergistically improve the bulk phase migration rate and the interface desolvation rate of sodium ions, so that the growth of sodium dendrites is inhibited, the coulombic efficiency of the sodium metal non-negative electrode battery is improved, and the cycle life of the sodium metal non-negative electrode battery is prolonged.

The invention discloses a preparation method of a fast-charging electrolyte for a sodium-ion battery, and relates to the technical field of sodium-ion batteries. The specific preparation method comprises the following steps: mixing the main film-forming agent, the additive, the solvent and the sodium salt, and then performing ultrasonic dissolution to obtain the electrolyte. Fluoroethylene carbonate is used as a main film-forming agent and preferentially participates in the formation of a negative electrode solid electrolyte interface film, so that the interface impedance is reduced and the continuous decomposition of the electrolyte is inhibited; additives including triphenyl phosphate, isodecyl diphenyl phosphate, trineopentyl phosphate and 4-aminophenylboronic acid pinacol ester are introduced, so that a desolvation energy barrier of Na < + > at an interface is reduced, and a more stable and effective interface film is formed; propylene carbonate and methyl ethyl carbonate are used as solvents, so that the sodium ion transmission efficiency is ensured; high-concentration sodium salt is used for promoting formation of a solvation structure for anion aggregation; and finally, the button cell prepared from the prepared electrolyte can effectively support fast charging and has good electrochemical performance.