62 results about "Electrolytes sodium" patented technology

The invention belongs to the technical field of sodium ion batteries, and discloses a sodium ion battery non-aqueous electrolyte and a sodium ion battery. The non-aqueous electrolyte of the sodium-ion battery comprises a non-aqueous organic solvent, electrolyte sodium salt and an additive, wherein the additive comprises a conventional additive and an acid anhydride substance with a structure as shown in a formula (I) and / or a formula (II). The acid anhydride additives with the structures shown in the formula (I) and the formula (II) in the electrolyte can form passive films on a positive-negative electrode interface, metal ion dissolution is inhibited, negative electrode active sites are covered, structural collapse caused by dissolution of metal ions in a positive electrode material is effectively avoided, catalytic reduction reaction of a solvent on the negative electrode interface is avoided, and the service life of the electrolyte is prolonged. Therefore, the dynamic performance and thermodynamic performance of the sodium-ion battery are improved, and the cycle performance, high-temperature performance and calendar life of the sodium-ion battery are improved.

The invention discloses a modified current collector and a preparation method thereof, a positive plate and a negative-electrode-free sodium ion battery, and relates to the technical field of sodium ion batteries. The aluminum oxide and the solid electrolyte sodium titanium aluminum phosphate grow on the aluminum metal three-dimensional substrate in situ, so that a higher ion conduction rate can be provided, the injection amount of the electrolyte can be reduced, the growth of dendritic crystals can be reduced, and the safety performance of the battery can be improved. The solid electrolyte (sodium aluminum titanium phosphate) and the artificial SEI film (sodium carbonate / sodium fluoride) are formed on the surface of the three-dimensional current collector, so that the deposition of sodium metal in a three-dimensional substrate is facilitated, and sodium dendrites can be prevented from growing on the surface of the current collector so as to prevent the diaphragm from being punctured. The solid electrolyte, the artificial SEI membrane and the cathode-free metal battery are used together, so that the effects of reducing the cost, prolonging the cycle life and improving the battery capacity density and safety are achieved.

An electrolyte, a sodium secondary battery and an electric device. The electrolyte comprises a first sodium salt and a first solvent, wherein the first sodium salt comprises sodium trifluoromethanesulfonate, and the first solvent has a structure as shown in formula I, with the mass ratio of the first sodium salt to the first solvent being 0.01-0.4. The electrolyte has a good low-temperature ionic conductivity, which is beneficial for improving the low-temperature cycling performance and low-temperature coulombic efficiency of the battery.

The invention discloses a sodium-ion battery electrolyte and a preparation method thereof, and relates to the technical field of sodium-ion batteries, the electrolyte comprises a sodium salt, a composite solvent, an additive and an auxiliary agent, the sodium salt is formed by compounding sodium bis (fluorosulfonyl) imide, sodium bis (trifluoromethanesulfonyl) imide and modified sodium bis (oxalato) borate, and the composite solvent is formed by compounding sulfolane, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol and 1, 3-butanediol. The auxiliary agent is nano-scale ZIF-8, the additive is 1, 3-propylene glycol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, the additive is modified 1, 3-propane sultone, trimethyl phosphate and hydroquinone dimethyl ether, and the auxiliary agent is nano-scale ZIF-8. According to the electrolyte, sodium bis (oxalato) borate is modified after being treated by hydrogen peroxide and has efficient hydrofluoric acid resistance, meanwhile, hydrofluoric acid generated by the reaction of fluorine-containing sodium salt and water in the electrolyte can be specifically removed by utilizing an auxiliary agent of the nano ZIF-8 and a synergistic effect formed by the sodium salt and the auxiliary agent, and damage of the hydrofluoric acid to a negative electrode SEI film is avoided; and the cycle life of the sodium ion battery is prolonged.

This invention relates to a sodium-supplementing material capable of simultaneously replenishing active sodium and sodium hexafluorophosphate, and its preparation and application. The sodium-supplementing material comprises the following raw material components by weight percentage: 10-50% elemental phosphorus, 50-90% sodium fluoride, and 1-5% Ketjen Black. Compared with existing technologies, the phosphorus-based bifunctional sodium-supplementing separator and sodium-supplementing cathode provided by this invention not only possess higher theoretical capacity, effectively compensating for irreversible capacity loss during the first cycle of the battery, but also generate NaPF6 in situ under electrochemical conditions through the synergistic reaction of red phosphorus and sodium fluoride, achieving simultaneous replenishment of active sodium and electrolyte sodium salts, thereby improving the initial coulombic efficiency and long-term cycle performance of the battery.

The invention provides a composite solid electrolyte and a preparation method and application thereof. The composite solid electrolyte is composed of a nitrile polymer solid electrolyte, a sodium salt, a plasticizer, an inorganic electrolyte and an interface coupling agent, wherein the interface coupling agent accounts for 0.5-2% of the total mass of the composite solid electrolyte. The preparation method comprises the following steps: sequentially dissolving and dispersing the components in an inert atmosphere, and finally preparing the high-performance interface modified composite solid electrolyte by combining ultrasonic treatment and vacuum drying technologies. The modified composite solid electrolyte effectively enhances the interfacial compatibility between the organic polymer component and the inorganic component, and overcomes the problem of poor interface bonding between the organic polymer component and the inorganic component. The preparation process is simple and easy to control, and the ionic conductivity of the prepared composite solid electrolyte is remarkably improved. The composite solid electrolyte is applied to an all-solid-state sodium battery, the cycling stability and the rate capability of the battery are greatly improved, and the composite solid electrolyte shows good application prospects and market potential.

The application discloses a kind of sodium ion battery electrolyte and preparation method thereof, it is related to sodium ion battery technical field, the electrolyte includes: sodium salt, composite solvent, additive and auxiliary agent, the sodium salt is sodium difluorosulfurylimide, sodium bis-trifluoromethanesulfonimide and modified sodium borate dihydroxide dioxalate compound composition, composite solvent is sulfolane-1,3-propanediol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, additive is modified 1,3-propane sulfone lactone, trimethyl phosphate and hydroquinone dimethyl ether, auxiliary agent is nano ZIF-8.This electrolyte sodium borate dihydroxide dioxalate is modified after hydrogen peroxide treatment, with high-efficiency anti-hydrofluoric acid capacity, while using the auxiliary agent of nano ZIF-8, sodium salt and auxiliary agent form synergistic effect can be targeted to remove hydrogen fluoride sodium salt and moisture reaction generated in electrolyte hydrofluoric acid, avoid the damage of hydrofluoric acid to negative electrode SEI film, and then improve the cycle life of sodium ion battery.

The invention provides an electrolyte, a battery and electric equipment, the electrolyte comprises an electrolyte sodium salt, an additive and an organic solvent, the additive comprises a dispersant, a wetting agent and an electrolyte membrane stabilizer, and the electrolyte membrane stabilizer comprises at least one of an alkali metal halide, a sodium compound and an aluminum compound. The electrolyte provided by the invention can inhibit the dissolution of an electrolyte membrane, improves the first efficiency and capacity of the battery, and is beneficial to improving the high-temperature cycling stability of the battery.

An electrolyte for secondary batteries includes an electrolyte salt, an organic solvent, and an additive, where the additive includes an amine compound and a sulfur-containing compound with a boiling point not greater than 70° C., where a mass percentage of the sulfur-containing compound in the electrolyte is 0.06% to 8%, optionally 0.08% to 6%, and a mass ratio of the sulfur-containing compound to the amine compound is 1:(0.08-13), optionally 1:(0.1-11), or further optionally 1:(0.5-2.5).

The invention provides a preparation method of a high-safety composite gel electrolyte, a sodium ion battery and a preparation method thereof, and the preparation method comprises the following steps: dissolving an electrolyte sodium salt in an organic solvent to prepare a mixed solution; adding a polymer monomer, a cross-linking agent and an initiator into the mixed solution to prepare an electrolyte; the preparation method comprises the following steps: dissolving polyvinylidene fluoride co-hexafluoropropylene in dimethylformamide, then adding black phosphorus nanosheets and graphene nanosheets, carrying out primary ultrasonic treatment, and then removing a solvent to prepare a polyvinylidene fluoride co-hexafluoropropylene coated black phosphorus / graphene material; and adding the polyvinylidene fluoride co-hexafluoropropylene coated black phosphorus / graphene material into the electrolyte, and carrying out secondary ultrasonic treatment to prepare the composite gel electrolyte. According to the invention, the liquid electrolyte of the sodium-ion battery is solidified into a gel state, so that the electrolyte loses fluidity, the problems that the electrolyte of the existing sodium-ion battery is easy to leak and burn are solved, and the use requirements of the sodium-ion battery are met.

The invention provides an in-situ growth solid electrolyte current collector, a preparation method and application thereof, and a negative-electrode-free sodium ion battery, and relates to the technical field of batteries. According to the preparation method of the in-situ growth solid electrolyte current collector, the surface of the current collector is coated with the binder-free conductive agent sol, TiO2 seeds are introduced, in-situ growth of the solid electrolyte sodium titanium aluminum phosphate is completed, the preparation method is simple and convenient, the solid electrolyte sodium titanium aluminum phosphate is grown on the prepared current collector in situ, and the in-situ growth solid electrolyte current collector has good application prospects. A higher ion conduction rate can be provided, the electrolyte injection amount is reduced, the growth of dendritic crystals is reduced, and the safety performance of the battery is improved; and the current collector also contains an ultrathin conductive agent coating and does not contain a binder, so that the uniform deposition of sodium ions is facilitated. The in-situ growth solid electrolyte current collector is used for preparing a negative-electrode-free sodium ion battery, the cost can be effectively reduced, the cycle life can be prolonged, and the energy density and the safety of the battery can be improved.

The invention discloses an electrolyte for regulating and controlling a stability mechanism of a sodium metal battery as well as a preparation method and application of the electrolyte. The electrolyte comprises an organic solvent, electrolyte sodium salt and an additive, wherein the additives are fluoro carbonates and sulfones. According to the invention, additives are added into the electrolyte, and the two additives are subjected to division and cooperation at the positive electrode side and the negative electrode side: a fluoro-carbonic ester reinforced solid electrolyte interface (SEI) and a sulfone stable positive electrode electrolyte interface (CEI), and complementation and cooperation are realized through solvation regulation and interface adsorption; by using the electrolyte added with the additive, the overall interface stability of the sodium metal battery can be remarkably improved, good electrochemical performance is ensured, the battery can efficiently and stably circulate, and excellent rate capability is shown. The electrolyte is prepared by adopting a low-cost and simple method, and the extremely stable sodium metal battery is obtained.

This application provides a sodium secondary battery electrolyte, a sodium secondary battery, and an electric apparatus. The sodium secondary battery electrolyte is provided, and the electrolyte includes a diluent, where the diluent includes alkane with a general formula CnH2n+2, where n is 8 to 13. The diluent can improve high-temperature cycling performance of a battery, reduce high-temperature gas production of the battery, and enhance electrochemical performance and safety performance of the battery at high temperature.

The application discloses a sodium supplement modification method for a negative-electrode-free sodium battery and the negative-electrode-free sodium battery. A composite positive electrode sodium supplement agent is added in a positive electrode active material; the composite positive electrode sodium supplement agent is composed of a sodium-rich layered oxide of a sodium ion battery and sodium carbonate; the mass of the composite positive electrode sodium supplement agent is 0.5wt%-10wt% of the total mass of the positive electrode active material; meanwhile, an electrolyte sodium supplement agent is added in an electrolyte; the added amount of the electrolyte sodium supplement agent is 1wt%-4wt% of the total mass of the electrolyte; and the mass ratio of the added amount of the electrolyte sodium supplement agent to the added amount of the composite positive electrode sodium supplement agent is in the range of 0.2-2:1. Through the cooperation of the electrolyte sodium supplement and the positive electrode sodium supplement, the application realizes rapid sodium supplement, continuous sodium supplement and interface optimization, effectively compensates for the irreversible sodium loss in the first charge-discharge process of the negative-electrode-free sodium battery, significantly improves the first coulomb efficiency, the energy density and the cycle stability of the battery, and promotes the large-scale application of the negative-electrode-free sodium battery.

This application provides an electrolyte for a sodium secondary battery, a sodium secondary battery, and an electric device. An electrolyte for a sodium secondary battery is provided, where the electrolyte includes an additive, and the additive includes a sulfate ester compound or a sulfonate ester compound. In this application, through the addition of an additive, including a sulfate ester compound or a sulfonate ester compound, in the electrolyte, the high-temperature cycling performance of the battery can be improved, the high-temperature gas generation phenomenon of the battery can be alleviated, and the electrochemical performance and safety performance of the battery can be improved.

The invention discloses trioxymethylene-containing sodium ion battery two-component electrolyte as well as a preparation method and application thereof. The two-component electrolyte consists of a component A and a component B, the component A comprises electrolyte sodium salt, an electrolyte solvent and trioxymethylene; the component B comprises Lewis acid or a Lewis acid precursor. The two-component electrolyte is divided into a component A containing trioxymethylene and a component B containing an initiator. The two components are stable after being independently placed and can be stored for a long time. And when the battery needs to be used, the component A and the component B are mixed and added into the battery for use. A new thought is provided for storage and transportation of the trioxymethylene-containing sodium ion battery electrolyte, and industrial production of the trioxymethylene-containing semi-solid sodium ion battery is facilitated.

The invention provides a green and efficient preparation method of an anthelmintic albendazole sulfoxide, which is characterized in that water is used as a green oxygen source, an anodic oxidation reaction is driven by electric energy at room temperature, albendazole sulfoxide is synthesized with high selectivity, and sulfone by-products generated by excessive oxidation are effectively avoided. According to the method, albendazole, cheap electrolyte sodium bromide, dimethyl sulfoxide and water are mixed into homogeneous reaction liquid, inert gas protection is not needed, and the homogeneous reaction liquid is introduced into an electrochemical microchannel continuous reactor to achieve oxidation. Compared with a traditional hydrogen peroxide oxidation method and a low-temperature chemical oxidation method, the method does not need to use a stoichiometric oxidizing agent, is mild in reaction condition, effectively avoids related safety and environmental risks, meets the requirements of green and sustainable development, and has a good industrial application prospect.

An embodiment of this application provides an electrolyte for a sodium-ion battery, a sodium-ion battery cell, a secondary battery, and an electric apparatus, belonging to the field of battery technology. The electrolyte includes a first additive, and the first additive includes a compound represented by general formula (I), where R1, R2, R3, and R4 each independently include at least one of a single bond or an alkylene group having 1 to 4 carbon atoms, R5 includes (II) or (III), R6 includes at least one of (IV), (V), and (VI), and R7 includes at least one of a single bond, an alkylene group having 1 to 3 carbon atoms, and an alkoxyalkylene group having 1 to 3 carbon atoms. A technical solution of the embodiment of this application can improve performance of the sodium-ion battery.

The present invention discloses a modified current collector and a preparation method thereof, a positive electrode sheet and a negative electrode-free sodium ion battery, and relates to the technical field of sodium ion batteries. The present invention in situ grows aluminum oxide and a solid electrolyte sodium aluminum titanium phosphate on a three-dimensional aluminum metal substrate, which can provide a faster ion conduction rate, reduce the injection amount of the electrolyte, reduce the growth of dendrites, and increase the safety performance of the battery. The solid electrolyte (sodium aluminum titanium phosphate) and the artificial SEI film (sodium carbonate / sodium fluoride) are formed on the surface of the three-dimensional current collector, which is conducive to the deposition of sodium metal inside the three-dimensional substrate, and can prevent sodium dendrites from growing on the surface of the current collector to prevent puncturing the diaphragm. The solid electrolyte, artificial SEI film and negative electrode-free metal battery are used together, so the effect of reducing costs, extending cycle life, and improving battery capacity density and safety is achieved.

The invention belongs to the technical field of organic electrochemical oxidation, and relates to a clean and efficient method for preparing phosphine oxide compounds through electrochemical oxidation. Mixing an organic phosphine compound I with an electrolyte, water and a solvent to obtain a mixed solution; and electrifying the mixed solution for electrochemical reaction to prepare the phosphine oxide compound II. According to the invention, electrolyte sodium chloride and water which are cheap and easy to obtain are used as oxygen sources, and green and efficient preparation of phosphine oxide compounds with various structures and various electrical properties is realized at room temperature. Compared with an oxidation method which is widely used at present, the method has the advantages that an oxidizing agent and a catalyst do not need to be added, inert gas protection is not needed, the reaction process is safe and high in cleaning efficiency, and the post-treatment and separation process is simple. According to the invention, green electrons are used as an oxidizing agent, so that complex oxidation systems, such as a hydrogen peroxide system, a metal oxide catalytic oxidation system and an organic catalyst oxidation system, which are widely used nowadays are avoided.

The invention provides a sodium-ion battery electrolyte, a preparation method and a sodium-ion battery, and belongs to the technical field of sodium-ion batteries. The sodium-ion battery electrolyte comprises an electrolyte sodium salt, an organic solvent and a functional additive, the electrolyte sodium salt comprises sodium difluorophosphate and sodium bis (fluorosulfonyl) imide; the organic solvent comprises cyclic carbonate, a sulfonate solvent and fluoroether. According to the invention, sodium difluorophosphate and sodium bis (fluorosulfonyl) imide are adopted as electrolyte sodium salts, so that a stable sodium ion conduction channel can be provided in the charging and discharging process of the battery, the battery is ensured to have good ionic conductivity, the charging and discharging efficiency of the battery is improved, and the performance of the electrolyte is remarkably improved by adding the functional additive.

The present invention provides an in-situ grown solid electrolyte current collector, a preparation method and application thereof, and a negative electrode-free sodium ion battery, and relates to the field of battery technology. The preparation method of the in-situ grown solid electrolyte current collector provided by the present invention is to complete the in-situ growth of solid electrolyte sodium aluminum titanium phosphate by coating a binder-free conductive agent sol on the surface of the current collector and introducing TiO2 seeds. The preparation method is simple and convenient. The solid electrolyte sodium aluminum titanium phosphate is in-situ grown on the prepared current collector, which can provide a faster ion conduction rate, reduce the injection amount of electrolyte, reduce the growth of dendrites, and increase the safety performance of the battery; the current collector also contains an ultra-thin conductive agent coating and does not contain a binder, which is conducive to the uniform deposition of sodium ions. The in-situ grown solid electrolyte current collector is used in the preparation of negative electrode-free sodium ion batteries, which can effectively reduce costs, extend cycle life, and improve battery energy density and safety.

The invention provides a sodium ion battery electrolyte and a sodium ion secondary battery, the electrolyte comprises an electrolyte sodium salt and a solvent composition, the solvent composition comprises an organic solvent and a functional impregnating compound, and the functional impregnating compound is trifluoromethyl benzene. According to the invention, by introducing the trifluoromethyl benzene as a functional agent and an impregnating compound, the wettability of the electrolyte on the diaphragm is improved, the desolvation energy of sodium ions is reduced, and the battery performance is greatly improved. And due to the addition of trifluoromethyl benzene, the compatibility of sulfone and carbonic ester solvents and a carbon negative electrode is particularly improved. In addition, the action mechanism of the trifluoromethyl benzene serving as the functional impregnating compound is completely different from that of a common surfactant, fluoro-ether and fluorobenzene, and the trifluoromethyl benzene has a very strong application prospect.

The present invention relates to a sodium secondary battery electrolyte and a sodium secondary battery. The sodium secondary battery electrolyte comprises an organic solvent, an electrolyte sodium salt and a fluorine-containing additive having a structure shown in formula (I), wherein R1, R2, R3, R4 and R5 are independently selected from -H, halogen, C1-C 20 Alkyl, halogenated C1~C 20 Alkyl, C6~C 26 Aryl or halogenated C6~C 26 Aryl. The sodium secondary electrolyte can reduce the irreversible decomposition reaction of the electrolyte, significantly improve the cycle stability, capacity retention rate and coulomb efficiency of the electrolyte, and can also significantly inhibit the increase of electrolyte acidity and chromaticity. When applied to sodium secondary batteries, it can induce the formation of a stable, low-impedance passivation film on the electrode surface, further improve the battery's cycle performance, and promote more uniform sodium plating and stripping on the sodium metal surface. It can also reduce the contact angle between the electrolyte and the electrode, improve wettability, and facilitate sodium ion transmission. #imgabs0#

The invention belongs to the field of solid polymer electrolytes, and particularly relates to a solid polymer electrolyte with a flexible interface as well as a preparation method and application of the solid polymer electrolyte. Mixing and dispersing cationized lignin, ionic liquid and electrolyte salt to obtain a mixed solution; the electrolyte salt is an electrolyte lithium salt or an electrolyte sodium salt for preparing the electrolyte; and in a water-free and oxygen-free environment, mixing and dispersing the mixed solution, an organic solvent and polyethylene oxide to obtain a dispersion solution, pouring the dispersion solution into a film, and carrying out vacuum drying to obtain the flexible solid polymer electrolyte. The solid electrolyte prepared from the lignin filler is high in interface flexibility, and the capacity retention rate of the assembled battery after long circulation is remarkably superior to that of a solid polymer electrolyte prepared from a conventional active filler.

The invention discloses a resource recycling method of tailings of a quartz vein type lead-zinc mine, which comprises the following steps: grinding the tailings to-0.074 mm, putting the tailings, water and sodium hydroxide into a reaction kettle for heating and leaching at the leaching temperature of 220 DEG C, the reaction time of 120 minutes, the alkali residue mass ratio of 2: 1 and the liquid-solid ratio of 5: 1, carrying out solid-liquid separation to obtain leached residues and leached liquid, and recycling the leached residues and the leached liquid to obtain the quartz vein type lead-zinc mine tailings. And adding a certain amount of electrolyte sodium sulfate into the leachate, dropwise adding a prepared sulfuric acid solution at a certain stirring rate, controlling the pH value of the reaction endpoint, aging for a period of time at a constant temperature after the reaction is completed, filtering and repeatedly washing after the aging is completed, and finally drying a filter cake to obtain hydrated silicon dioxide, namely a white carbon black product. The product can meet the product requirements of the highest class A in the national standard GB / T10722. The technology of heating alkaline leaching and sulfuric acid precipitation is adopted, the technological process is short, the leaching rate of silicon dioxide is high, and a high-quality white carbon black product is obtained, so that recycling and reduction of a lead-zinc mine are achieved, and the development direction is pointed out for processing and utilization of high-silicon solid waste.

The invention discloses a sodium zirconium phosphate composite material for hemodialysis and a preparation method thereof, and belongs to the technical field of hemodialysis, the preparation method comprises the following steps: (1) modifying zirconium phosphate by using a sodium hydroxide solution to obtain modified zirconium phosphate; and (2) preparing a mixed suspension by using the modified zirconium phosphate, a nonionic surfactant, a polymer and an organic solvent, atomizing the mixed suspension into micro-droplets by using an electrostatic spraying method, and collecting the micro-droplets by using a nonionic surfactant aqueous solution to obtain the sodium zirconium phosphate composite material for hemodialysis, the method disclosed by the invention is simple in steps and easy to implement, and the prepared sodium zirconium phosphate composite material for hemodialysis is spherical or sphere-like in morphology, large in particle size and good in NH4 < + > removal effect, can be simply regenerated by using a proper electrolyte sodium chloride solution after being used, and can be recycled for multiple times.

The device comprises an electrolyte diaphragm tube, a positive stirring shaft and a negative shell, the electrolyte diaphragm tube is filled with sodium chloride and sodium tetrachloroaluminate, the positive stirring shaft is located in the electrolyte diaphragm tube and mixes the sodium chloride and the sodium tetrachloroaluminate, the negative shell is arranged outside the electrolyte diaphragm tube in a sleeving mode, and the positive stirring shaft is located in the negative shell and mixes the sodium chloride and the sodium tetrachloroaluminate. And the cathode shell is electrically connected with the electrolyte diaphragm tube through a conductive card. The device is applied to industrial production, sodium chloride powder can be continuously added for production, the sodium chloride powder is in full contact with molten sodium tetrachloroaluminate, the sodium chloride powder floats above the molten sodium tetrachloroaluminate, and the sodium chloride powder is in contact with the sodium tetrachloroaluminate only at an interface. And the problem of solid-solid contact between the electrolyte sodium chloride and the positive electrode material is effectively avoided, so that the electrolytic current efficiency is effectively improved.

The invention belongs to the technical field of sodium-ion batteries, and discloses a sodium-ion battery non-aqueous electrolyte containing sodium sulfonate and a sodium-ion battery. The non-aqueous electrolyte of the sodium-ion battery comprises a non-aqueous organic solvent, electrolyte sodium salt and additives, wherein the additives comprise a conventional additive and a sodium sulfonate additive with a structure as shown in a formula (I); in the imgabs0 #, R is selected from alkyl, alkenyl, alkynyl and halides thereof, aromatic hydrocarbon, fluoroalkyl, trimethylsilyl, ethyoxyl, cyano and sodium ions. According to the electrolyte, the sodium sulfonate additive with the structure shown in the formula (I) and other additives act together, so that the dynamic performance and thermodynamic performance of the sodium-ion battery are better improved, the cycle performance and high-temperature performance of the sodium-ion battery are improved, and the calendar life of the sodium-ion battery is prolonged.

The present application provides an electrolyte solution and a battery. The electrolyte solution comprises: an electrolyte sodium salt; and an organic solvent, the organic solvent being an isophthalate solvent and / or a terephthalate solvent, wherein the volume content of the organic solvent accounts for 50 vol% or above of the solvent in the electrolyte solution.