104 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 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.

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 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.

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 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 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 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.

This invention discloses a method for preparing long-term stable ultra-high purity silica sol. The method involves preparing silica sol using an alkoxide method, followed by forced cyclic desolvation. By adding conjugate acid-base ionic dispersants, the pH and thermal stability of the silica sol are maintained. The prepared silica sol is then modified and subjected to high-pressure aging to ultimately obtain an ultra-high purity silica sol with a mass fraction of over 20%, a primary particle size between 30-150 nm, a secondary particle size between 50-350 nm, and an association degree between 1.7-2.3. The silica sol has a metal ion content of less than 1 ppm, a loss of less than 5% during preparation, and exhibits excellent polishing performance.

The invention discloses an ethyl cellulose aqueous dispersion and a preparation method thereof, and belongs to the technical field of ethyl cellulose aqueous dispersion preparation. The method comprises the following steps: dissolving ethyl cellulose in a solvent to obtain an ethyl cellulose solution; the preparation method comprises the following steps: sequentially adding a plasticizer, oleic acid, ammonia water and a suspending aid into an ethyl cellulose solution under mechanical stirring, and then adding water to obtain an oil-in-water type crude emulsion; carrying out spray desolvation on the oil-in-water type crude emulsion, and adjusting the solid content and the pH value to obtain a semi-finished product; and homogenizing the semi-finished product to obtain the ethyl cellulose aqueous dispersion. The invention also discloses the ethyl cellulose aqueous dispersion prepared by the method. The method provided by the invention can effectively solve the problems of difficult desolvation in the preparation process of the existing solvent method, influence on film formation of the ethyl cellulose aqueous dispersion due to addition of a defoaming agent, and unstable drug release rate and drug effect caused by the influence on the film formation of the ethyl cellulose aqueous dispersion.

The invention relates to a continuous preparation method of a nitroimino triazine compound, and belongs to the technical field of organic chemistry. The method comprises the following steps: performing continuous reaction on raw materials through a tubular reactor, adding a stabilizer and a dehydrating agent into a reaction solution for dehydration-desolvation, and after dehydration, thoroughly removing the dehydrating agent from the material to prepare a triazine intermediate solution. According to the method, a distillation mode is adopted for dehydration, and compared with a traditional crystallization process, mother liquor cannot be generated, so that impurity accumulation cannot be caused, the purity of the triazine intermediate can be effectively improved under the condition that the utilization rate of raw materials is guaranteed, and the HPLC purity of the triazine intermediate is kept to be 99.0% or above. The problems that the yield and the purity are influenced by impurity accumulation or the utilization rate of raw materials is low in the prior art are solved.

The embodiment of the invention discloses an electrolyte and a battery, the electrolyte comprises a solute and a mixed solvent, the mixed solvent comprises a main solvent and a cosolvent, and the cosolvent comprises alkoxylated cyclic carbonate. When the alkoxylated cyclic carbonate is added into the electrolyte as a cosolvent, when the electrolyte is at a low temperature, a flexible chain segment of the alkoxylated cyclic carbonate can enhance the solvation ability of ions formed by dissociation of a solute in the electrolyte, and the desolvation time is shortened; and when the electrolyte is at a high temperature, the rigid carbonate cyclic structure of the alkoxylated cyclic carbonate can inhibit free radical chain reaction, reduce gas production and maintain high dielectric constant and interface stability at the same time, so that the self-adaptability of the electrolyte in a wide temperature range is improved.

This invention discloses a low-temperature fast-charging electrolyte suitable for graphite-based lithium-ion batteries. The electrolyte contains Li... + The solvated clusters are 1.5–3.0 nm in size, a size range that enables bulk / interfacial ion conduction and low Li- content. + A balance is struck between desolvation energy barrier and high interfacial stability. The electrolyte contains lithium salt, a non-aqueous organic solvent with strong / weak solvation capabilities, and film-forming additives. This balance is achieved by adjusting the lithium salt concentration and the number of solvent donors. The electrolyte operates at -60°C. o C remains liquid, -20 o The C-ion conductivity is higher than 3.5 mS / cm. Lithium-ion batteries using this electrolyte operate at -20°C. o C, at a 0.5C rate, stable cycling is achieved, with capacity retention not less than 85% after 150 cycles. This invention utilizes Li... + Solvated cluster size serves as a core guideline for electrolyte design, providing new insights for developing energy storage devices that combine low-temperature performance and fast-charging capabilities.

The invention discloses a solvent removal device, and relates to the technical field of petrochemical equipment, the solvent removal device comprises a solvent pump, the liquid outlet end of the solvent pump is communicated with an extraction tower and a colloid separator, the liquid inlet end of the solvent pump is communicated with an air cooler, a buffer tank is arranged between the solvent pump and the air cooler, and the buffer tank is communicated with the colloid separator. A liquid inlet pipe and a liquid outlet pipe are arranged on the buffer tank, and a filtering detection assembly and a liquid outlet switching assembly are further arranged in the buffer tank. Through the arrangement of the air cooler, the buffer tank, the solvent pump and the filtering detection assembly, the air cooler and the buffer tank can separate out and separate deasphalted oil in a mixed solution, so that the purity of a solvent entering the solvent pump is improved, the solution density is reduced, and the power of the solvent pump is reduced; in addition, a second temperature sensor and a third temperature sensor are used for monitoring the temperature of the solution in the middle of the tank body and the temperature of the solution on the tank wall, and the control module can make the switching piece control the liquid outlet sequence of the solution in the buffer tank according to the temperature threshold value.

The present invention discloses a monofluoro-substituted ether solvent, an electrolyte containing the same, and their applications. The monofluoro-substituted ether solvent is a monofluoro-substituted ether compound having the general formula shown in Formula I, wherein R<subgt;1< / subgt> and R<subgt;2< / subgt> are each independently selected from a methyl group or a phenyl group. The structure of the monofluoro-substituted ether solvent is novel, with a methyl group or a phenyl group connected thereto. By connecting the methyl group or the phenyl group, there are fewer active sites on the carbon between the two oxygens in the structure, thereby obtaining higher stability. Moreover, the electrolyte formed by compounding it with conventional lithium salts in the art has a lower viscosity and a higher interfacial stability towards a lithium metal negative electrode. At the same time, under low-temperature conditions, such ether-based electrolytes have a lower desolvation energy, which helps to improve the low-temperature reaction kinetics of the battery and the low-temperature cycling performance of the battery.