169 results about "Battery electrolyte" patented technology

This invention proposes a lithium-ion battery electrolyte and its application. The electrolyte comprises at least the following components: a fluorinated solvent, including 2,2-difluoroethyl acetate, fluoroethylene carbonate, and 2,2-difluoroethyl ethyl carbonate; a lithium salt, including a first lithium salt comprising lithium hexafluorophosphate; and an additive, including a first additive comprising lithium difluorobis(oxalato)phosphate. The lithium-ion battery electrolyte and its application proposed in this invention can improve the electrolyte's high-voltage resistance and kinetic performance, reduce battery impedance, and enhance the battery's fast-charging performance and high-temperature cycle stability.

This invention relates to the field of aqueous metal battery technology, specifically to an aqueous tin metal battery electrolyte containing metal sulfate additives, its preparation method, and its application. The electrolyte is based on an alkaline electrolyte (such as KOH) and soluble tin salts (such as SnSO4, SnCl2), with added metal sulfates such as Li2SO4, ZnSO4, K2SO4, MnSO4, or Na2SO4 as additives at a concentration of 0.01 mol / L to 0.5 mol / L. The metal cations preferentially adsorb onto the surface of the metal anode to form an electrostatic shielding layer, regulating metal ion deposition behavior, inhibiting the formation of "dead tin," and significantly improving the battery's cycle stability and coulombic efficiency.

The application discloses a kind of aqueous sodium-ion battery electrolyte hydration cell desolvation path screening method, comprising the following steps: step 1: constructing and optimizing the structure model of anion and cation of electrolyte dissolution in electrolyte and aqueous sodium-ion battery electrolyte system model: step 2: the ion hydration cell structure evolution in electrolyte is simulated;Step 3: extracting and optimizing steady-state ion hydration cell from the simulation results of step 2;Step 4: the desolvation path of steady-state ion hydration cell obtained in step 3 is analyzed, and the best path of steady-state ion hydration cell desolvation is obtained.The present application takes the ion hydration mechanism in aqueous sodium-ion battery electrolyte as the core, combines classical molecular dynamics, ab initio molecular dynamics, density functional theory, and studies the steady-state ion hydration cell configuration of electrolyte under different concentrations by multi-scale simulation and screens its desolvation path, to provide theoretical guidance for high-performance aqueous sodium-ion electrolyte design.

The present invention relates to compounds for electrolytes, compounds for electrolyte additives, electrolyte substances, electrolyte additives, electrolytes for secondary batteries, and secondary batteries, and provides an electrolyte for secondary batteries containing a novel compound or its isomer.

This invention belongs to the field of lithium-ion battery flame retardant technology, specifically relating to a flame-retardant electrolyte, its preparation method, and its application. The electrolyte comprises: lithium salt, carbonate organic solvent, co-solvent, and flame-retardant additive; the concentration of lithium salt in the electrolyte composed of lithium salt and carbonate organic solvent is 0.5–5 mol / L; the volume ratio of carbonate electrolyte to flame-retardant additive is 100:(1–30); the volume ratio of co-solvent to flame-retardant additive is (4–120):(1–5); the co-solvent is a solvent capable of dissolving the flame-retardant additive, and the flame-retardant additive is a perfluorohexane derivative. This invention proposes introducing a co-solvent that does not interact with lithium ions into the electrolyte. Through the bridging effect of the co-solvent, the insoluble flame retardant is introduced into the conventional electrolyte. The flame-retardant electrolyte prepared by this method does not deteriorate its electrochemical performance due to the addition of the flame retardant, thus solving the problem of incompatibility between the flame-retardant performance and electrochemical performance of lithium-ion battery electrolytes.

This application relates to the field of synthesis technology of lithium-ion battery electrolyte additives, specifically to a synthesis process of 1,3-propanedisulfonyl fluoride. The synthesis process includes the following steps: S1. Adding 1,3-propanedisulfonyl chloride and potassium fluoride to a reaction vessel; S2. Adding distilled water as a reaction solvent to the reaction vessel and refluxing under stirring; S3. After the reaction solution has settled and separated into layers, separating and collecting the oil phase, adding toluene and activated carbon to the oil phase, and refluxing for decolorization; S4. Performing a first crystallization treatment on the decolorized solution, followed by filtration, and washing the filter cake obtained from the filtration; S5. Collecting the filtrate obtained after the first washing and performing a second crystallization treatment, followed by filtration again; S6. Vacuum drying the filter cake obtained in steps S4 and S5 to obtain 1,3-propanedisulfonyl fluoride. This application features mild reaction conditions, simple operation, low cost, and environmental friendliness.

The application provides a preparation method of a full-solid-state lithium battery electrolyte and an integrated battery for energy storage, and belongs to the technical field of lithium ion secondary batteries, and can at least partially solve the problems of insufficient comprehensive performance of solid-state electrolyte, large solid-solid interface impedance, poor cycle stability, poor high-voltage adaptability and high safety risk of existing full-solid-state lithium batteries, and the application comprises the following steps: preparing a polydopamine functionalized graphene oxide aqueous solution, preparing a lithiated polyionic liquid ethanol aqueous solution, preparing a Co-N-C dispersion, preparing an electrolyte film based on the above-mentioned solutions, then preparing a positive electrode and a negative electrode, sequentially stacking the positive electrode, the electrolyte film and the negative electrode, realizing close adhesion of the solid-solid interface through hot pressing, performing gradient heat curing treatment after assembly, finally adopting aluminum plastic film packaging to obtain an integrated battery. The integrated battery prepared in the application can effectively reduce the interface impedance, improve the cycle stability and high-voltage adaptability, reduce the safety risk, and optimize the comprehensive performance.

The application relates to a structural battery electrolyte with excellent impact resistance and a preparation method and application thereof, wherein the structural battery electrolyte is prepared by compounding main raw materials such as colloidal nanoparticles, shear thickening additives, lithium salts, fluoroacetonitrile (FAN), polymer precursors, initiators and the like through chemical action. The colloidal nanoparticles account for 2 wt%-30 wt% of the total amount of the electrolyte, the shear thickening additives account for 0.2 wt%-2 wt% of the total amount of the electrolyte, and the lithium salt / FAN=1.0-1.5 M. The application adds colloidal nanoparticles and polymer additives into a fluoroacetonitrile (FAN) solution containing lithium salts, realizes the shear thickening performance of the electrolyte by using the "particle cluster" theory, and further endows the battery with the ability of resisting impact and preventing thermal runaway. The shear thickening electrolyte prepared by the application has excellent impact resistance, high conductivity and excellent stability, provides a new idea for the preparation and optimization of the impact-resistant structural electrolyte, and is favorable for improving the safety of lithium metal batteries.

A formulation graph convolution network (F-GCN) with multiple GCNs assembled in parallel and connected to filters and an external learning architecture is able to predict the effectiveness of a formulation. Input into the multiple GCNs are molecular structures of formulants, which are processed as molecular graphs and output as molecular descriptors. The molecular descriptors are filtered by normalized ratios or fractions of the ingredient molecules in a formulation, such as a battery electrolyte or solvent. A formulation descriptor combines the filtered molecular descriptors to arrive at a predicted performance for the formulation, such as the battery capacity for an electrolyte formulation, by an external learning architecture. F-GCN may use a pre-trained GCN with physico-chemical properties of known molecular structures.

The application discloses a water-based zinc ion battery electrolyte, a preparation method and application thereof. The water-based zinc ion battery electrolyte contains a zinc salt, ethylene glycol ether and water. The zinc salt is selected from at least one of ZnSO4, ZnCl2 and Zn(OTf)2. In the water-based zinc ion battery electrolyte, the mass content of the ethylene glycol ether is 1-20 wt%. The concentration of the zinc salt is 3M.

This invention discloses a method for modifying an electrolyte for aqueous zinc-ion batteries and its application, belonging to the field of zinc anode protection technology for aqueous zinc-ion batteries. This invention employs a simple and efficient method, adding melamine and 1,5-naphthalenedisulfonic acid as electrolyte additives, thereby significantly improving the electrochemical performance of aqueous zinc-ion batteries. Experimental tests showed that at a current density of 1 mAh / cm², [the performance was improved]. 2 Surface capacity is 1mAh / cm 2 Under the specified conditions, the method of this invention increases the cycle life of the battery from 250 hours to 2500 hours, a tenfold increase. This technical solution is simple and effective, has broad application prospects, and provides a new solution for the commercial application of aqueous zinc-ion batteries.

This application relates to the field of fine chemical separation and purification technology, and particularly to a method for purifying vinyl sulfate. The method for purifying vinyl sulfate includes the following steps: dissolving crude vinyl sulfate in an organic solvent to prepare a solution; evaporating a portion of the organic solvent in the solution to prepare a concentrated crystallization solution, wherein the evaporation of the organic solvent further includes a step of ultrasonic treatment of the solution; and cooling the concentrated crystallization solution for crystallization. This purification method can prepare high-purity vinyl sulfate with a high yield. Furthermore, the purified vinyl sulfate crystal product meets the requirements for lithium-ion battery electrolyte additives in terms of chlorine content, moisture content, and acidity.

An electrolyte for a lithium secondary battery according to embodiments of the present disclosure may include a composite membrane including a lithium salt, an organic polymer, and an inorganic electrolyte, and a flame retardant compound including a phosphorus-containing functional group. The weight ratio of the flame retardant compound to the composite membrane may be 0.004 to 0.3. Accordingly, the flame retardancy and electrical properties of the secondary battery may be improved.

The application discloses a preparation method of acetic acid 2,2-difluoroethyl ester and belongs to the technical field of battery electrolyte additives. The application takes alkali metal acetate and 2,2-difluoro-1-chloroethane as reaction raw materials, prepares acetic acid 2,2-difluoroethyl ester in dimethyl sulfoxide, and then adopts a post-treatment process of extracting the reaction liquid first and then distilling, so that the problem that the interaction between dimethyl sulfoxide and the product is difficult to distill is effectively avoided, and problems, such as the decomposition of dimethyl sulfoxide at high temperature to reduce the purity of the product and the combination of the decomposition product and the product, are also avoided. Meanwhile, the reaction condition of the application is mild, the operation is simple, a complex catalytic system is not needed, and the application does not depend on specific reaction equipment, so the application has a good large-scale industrial production prospect.

This invention discloses a sodium-ion battery electrolyte, belonging to the field of sodium-ion battery technology, comprising an organic solvent, a sodium salt, and additives; the organic solvent includes ethylene carbonate, propylene carbonate, methyl ethyl carbonate, and ethyl acetate; the sodium salt includes sodium hexafluorophosphate and sodium difluorosulfonylimide; the additives include fluoroethylene carbonate, vinylene sulfate, sodium difluorophosphate, sodium difluorooxalate borate, and tris(trimethylsilane)phosphate. The sodium-ion battery electrolyte of this invention, through precise adjustment of the solvent and sodium salt ratio, maintains high conductivity at extremely low temperatures, significantly raising the lower limit operating temperature of the battery to -70°C. Simultaneously, through the synergistic effect of the sodium salt and additives, a high-temperature resistant SEI film rich in inorganic components is formed, reducing side reactions at high temperatures and raising the upper limit operating temperature of the battery to 85°C, achieving a wide temperature range application of the battery from -70°C to 85°C.

This utility model belongs to the technical field of battery electrolyte addition equipment, specifically relating to an automatic batch battery electrolyte addition device. It includes an infeed conveyor belt, an outfeed conveyor belt, a tray transfer assembly, a tray gripping arm, and an automatic dispensing head. The tray gripping arm and the automatic dispensing head are respectively positioned above both ends of the tray transfer assembly. The infeed conveyor belt and the outfeed conveyor belt are respectively positioned on the front and rear sides of the tray transfer assembly corresponding to one end of the tray gripping arm. The tray transfer assembly includes a tray holder, which is slidably fitted onto a reciprocating guide rail. This utility model can quickly complete the batch addition process of battery electrolyte and output material plates containing batteries one by one, facilitating subsequent assembly processes, helping to avoid electrolyte leakage, and improving battery production quality and efficiency.

The application discloses a polymer electrolyte for a lithium metal battery and a preparation method and application thereof, and relates to the technical field of battery electrolyte materials. + The desolvation energy barrier at the electrode interface is reduced, the ionic conductivity of the electrolyte is significantly enhanced, and the lithium ion can be guided to form a stable solid electrolyte interface film in cooperation with the lithium ion, so that the uniform lithium ion flow is achieved, the uncontrollable growth of lithium dendrites is significantly inhibited, the side reaction consumption of the electrolyte in the cycle process is greatly reduced, and the long-period stability of the battery is effectively ensured, and the application is suitable for large-scale popularization and application in lithium metal batteries.

The application discloses a water-based zinc ion battery electrolyte containing a chain polyether additive and application thereof, and belongs to the technical field of water-based zinc ion batteries. By adding 0.05-0.5 mol / L of an ether additive in the electrolyte of a water-based zinc ion battery, triple synergistic effects are realized: the solvation structure of zinc ions is adjusted, free water is reduced, and hydrogen evolution and side reactions are inhibited; zinc is induced to preferentially grow along a (002) crystal surface, dendrites are inhibited, and corrosion resistance is improved; and the ether additive participates in the formation of a dense and stable SEI film to block water molecules from contacting the zinc negative electrode. The electrolyte is suitable for Zn||Zn symmetric batteries, Zn||Cu asymmetric batteries and full battery systems such as Zn||vanadium-based positive electrodes, can significantly improve the cycle life and coulombic efficiency of the batteries, and has important practical value.

This invention belongs to the field of battery electrolyte additive technology, specifically disclosing a benzenesulfonate ester additive and its application in sodium-ion battery electrolytes. It is a compound with the structural formula shown in formula (I): The phenyl group in the benzenesulfonate ester additive of this invention improves the overcharge protection performance of the battery, and the sulfonate ester group can form a stable inorganic SEI film and improve oxidation stability. Combining these two functional units in sodium-ion battery electrolyte additives can not only effectively improve the battery's high voltage resistance, operating temperature range, safety, and cycle stability, but also promote the application of low-cost, high-safety, and long-cycle sodium-ion secondary batteries in the energy storage field, thus solving many performance shortcomings of existing sodium-ion secondary battery electrolytes.

Electrolyte formulations for lithium-ion batteries are disclosed that enable high-voltage operation, improved cycle life, reduced impedance, and enhanced safety. The formulations comprise an aprotic organic solvent, a lithium salt, and an epoxide functionalized organic compound, and may further include additives such as organosulfur compounds, alkyl nitriles, fluorinated aliphatic esters, cyclic carbonates, partially fluorinated phenyl phosphate esters, and fluorinated cyclic phosphazenes. These components synergistically stabilize the cathode electrolyte interface (CEI), mitigate oxidative decomposition at elevated voltages, and impart flame-retardant properties. Electrochemical energy storage devices incorporating these formulations exhibit superior performance under high-voltage and high-temperature conditions, making them suitable for applications such as electric vehicles, aerospace systems, and grid storage.

This invention relates to an electrolyte insulating layer for all-solid-state batteries, its production equipment, and its preparation process. The preparation process is characterized by the following polarization treatment: heating the electrolyte while applying a DC voltage; after the electrolyte transforms from a solid to a liquid state and is fully polarized, rapidly cooling the electrolyte to room temperature while simultaneously stopping the application of the DC voltage, thus completing the polarization of the electrolyte; the polarization treatment process is repeated multiple times; the electrolyte used in each polarization treatment is different; the electrolyte obtained from the previous polarization treatment is used as a dielectric in the subsequent polarization treatment. All-solid-state batteries made using the electrolyte insulating layer of this invention can effectively improve the polarizability of the battery electrolyte, thereby more effectively increasing the energy storage per unit volume of the battery.

This invention discloses a non-flammable phosphate ester-based lithium-ion battery electrolyte with high electrochemical compatibility, belonging to the field of lithium-ion battery electrolyte technology. This invention constructs a dual regulatory mechanism of negative electrode micro-interfacial chemistry and solvation structure. Utilizing the specific characteristic that the decomposition potential of selected halogenated aromatic compounds is higher than that of phosphate ester solvents, this invention induces the formation of a dense and highly rigid solid electrolyte interfacial film on the negative electrode surface during the first charge-discharge cycle, achieving physical barrier properties. Furthermore, this additive effectively reconstructs the interfacial solvation structure of lithium ions, weakening the coordination effect of phosphate esters and promoting rapid desolvation of lithium ions. Under the action of this dual regulatory mechanism, the graphite stripping problem caused by phosphate ester co-intercalation-decomposition is fundamentally blocked. While achieving reversible intercalation and deintercalation of lithium ions in graphite and maintaining intrinsic flame-retardant properties, it also significantly improves the battery's reversible capacity, long cycle life, and comprehensive high and low temperature performance, showing broad application prospects.

This invention discloses a high-stability, low-temperature lithium-ion battery electrolyte, its preparation method, and a lithium-ion battery. The high-stability, low-temperature lithium-ion battery electrolyte of this invention comprises a solvent system and composite additives. By mass percentage, the solvent system comprises 94%–96% and the composite additives comprise 4%–6% of the liquid system. The solvent system includes ethylene carbonate, dimethyl sulfite, and carboxylic acid esters in a mass ratio of 35–45:30–40:10–30. The composite additives include siloxane additives and fluoroethylene carbonate in a mass ratio of 2–3:2–3. This invention, through the synergistic design of the solvent system, endows the electrolyte with excellent low-temperature ion conductivity. Simultaneously, by utilizing the synergistic effect of the siloxane composite additives and film-forming additives, it significantly improves the stability of the electrode / electrolyte interface, enabling the lithium-ion battery to exhibit good charge-discharge performance and cycle stability in the low-temperature range of -40℃ to 25℃.

This application relates to the field of new energy technology, and particularly to a quasi-solid-state battery electrolyte membrane, its preparation method, and the quasi-solid-state battery itself. The preparation method includes the following steps: mixing a polymer matrix, a bifunctional reactive liquid crystal monomer, a lithium salt, a mixed solvent, functional additives, and a photoinitiator to obtain a precursor solution, wherein the mixed solvent includes a first solvent and a second solvent; providing a substrate with a thermal conductivity not exceeding 0.3 W / m·K; coating the substrate with the precursor solution to form a wet film; controlling the surface temperature of one side of the wet film to T1 and the surface temperature of the other side to T2; wherein T1-T2 is 25℃~40℃; evaporating the first solvent and retaining at least a portion of the second solvent to form a dry film; photocuring the dry film; removing the substrate to obtain the quasi-solid-state battery electrolyte membrane. The above method can achieve an asymmetric component gradient distribution structure of "polymer enrichment (high stability) on the negative electrode side and liquid crystal enrichment (high conductivity) on the positive electrode side," thereby improving battery cycle performance.

The utility model provides a kind of automatic quantitative liquid injection equipment, including filling machine, filling machine includes pedestal and the liquid storage cylinder of being set on pedestal, the pedestal of filling machine is also provided with adjustable ration cylinder, the lower part of liquid storage cylinder is provided with control valve, adjustable ration cylinder is communicated with control valve, the inside sliding of adjustable ration cylinder is provided with plunger rod, the outside of adjustable ration cylinder is provided with first telescopic push rod, first telescopic push rod can pull plunger rod and the capacity of adjustable ration cylinder filled is adjusted, the utility model can adjust the capacity of adjustable ration cylinder by first telescopic push rod, cooperate control valve to realize the filling operation of different battery electrolyte capacity, more convenient and accurate and efficient, greatly improve the accuracy and filling efficiency of battery electrolyte filling.

The utility model belongs to battery production equipment technical field especially relates to a kind of battery electrolyte filling quantitative mechanism. Including chassis, buffer mechanism, liquid injection mechanism, drive mechanism and control platform. Buffer mechanism includes buffer guide rod, buffer limit ring, elastic buffer and buffer guide plate. Liquid injection mechanism includes injection needle, liquid injection cylinder and injection piston. Drive mechanism includes motor board, servo motor, motor shaft, coupling, screw rod and nut. Motor board is connected to buffer guide rod, motor shaft is connected to servo motor, coupling is connected with motor shaft and screw rod respectively, nut is threadedly connected to screw rod, nut is movably arranged in liquid injection cylinder, and is connected with injection piston. Control platform is electrically connected with servo motor. The battery electrolyte filling quantitative mechanism provided in the application can play a buffering role during the liquid injection process through the buffer spring in the buffer mechanism, reducing the impact force on the battery during liquid injection, avoiding damage to the battery and improving the service life of the battery.

This application relates to the field of battery production equipment technology, and discloses a battery electrolyte injection fixture and a battery production line. The battery electrolyte injection fixture includes a driving device, a first clamping part, and a second clamping part. The driving device is drivenly connected to the first and second clamping parts. The first clamping part has a first clamping surface, and the second clamping part has a second clamping surface. The first and second clamping surfaces are disposed opposite to each other. The first clamping surface is a curved surface convex towards the second clamping surface. When the driving device drives the first and second clamping parts to clamp the battery cell, the battery cell has a first sidewall and a second sidewall along a first direction. The first clamping surface corresponds to the first sidewall, and the second clamping surface corresponds to the second sidewall. At least a portion of the first sidewall is intermittently abutted by the corresponding portion of the first clamping surface. The purpose of this technical solution is to improve the uniformity of electrolyte wetting inside the battery cell, shorten the wetting time, and improve the overall battery performance.

The application discloses a quasi-solid-state sodium battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium metal batteries. The quasi-solid-state sodium battery electrolyte provided by the application comprises a photocuring agent, a sodium ion electrolyte and a two-dimensional material; the two-dimensional material comprises one or more of fluorinated graphene, titanium nitride, boron nitride, silicon disulfide, tungsten disulfide and silicon carbide. The quasi-solid-state sodium battery electrolyte provided by the application has good mechanical strength and mechanical stability, can reduce the resistance of the quasi-solid-state sodium battery electrolyte, and improve the ionic conductivity; when the quasi-solid-state sodium battery electrolyte is applied to a sodium metal battery, the sodium metal battery has higher specific capacity under small and large rates, and can maintain long-time cycle stability.

This utility model discloses a reinforced injection needle mechanism, belonging to the field of battery electrolyte injection production technology. The reinforced injection needle mechanism includes an injection cylinder with a rotating structure, and an injection needle tube fixedly connected to the outlet end of the injection cylinder. Its key feature is that it further includes a reinforcing structure fixedly connected to the injection cylinder at one end. The reinforcing structure is arranged around the circumference of the injection needle tube, and the length of the reinforcing structure is less than the length of the injection needle tube. This utility model, by forming a ring of reinforcing structure on the injection needle tube, on the one hand, maintains the standard length of the injection needle tube inserted into the injection hole, preventing air bubbles or electrolyte backflow; on the other hand, it prevents the injection needle tube from colliding with the injection hole during the alignment process, thus preventing deformation of the injection needle tube.