58 results about "Sodium perchlorate" patented technology

The invention relates to a BIPB synthesis method, which is characterized by comprising the following steps: S1, raw material feeding: adding tert-butyl hydroperoxide into a reaction flask, adding di-(2-hydroxyisopropyl) benzene under a stirring condition, fully reacting, and adding trifluoromethanesulfonic acid; step S2, condensation reaction: after the trifluoromethanesulfonic acid is completely added and fully reacts, adding water to terminate the reaction, and standing after stirring at controlled temperature; s3, post-treatment alkali washing: separating the reaction liquid after standing, retaining an upper organic phase, sequentially carrying out alkali washing and water washing on the organic phase, discharging reaction wastewater in a layered manner, retaining the upper organic phase, pouring out the organic phase, cooling, solidifying the organic phase, and crushing to obtain a finished product. Compared with the prior art, the preparation method has the advantages that trifluoromethanesulfonic acid is used as the catalyst, no auxiliary means are needed, side reactions and harmful substances generated by reaction of sulfuric acid, sodium perchlorate and the like are avoided, higher-quality BIPB can be obtained, the yield of BIPB is increased, the preparation method is safer and more environmentally friendly, and the cost is greatly reduced.

The invention belongs to the technical field of sodium-ion batteries, and particularly relates to a sodium salt composition, a sodium-ion battery electrolyte and application thereof, and a sodium-ion battery. The sodium salt composition provided by the invention comprises any five or more of sodium bis (trifluoromethanesulfonyl) imide, sodium hexafluorophosphate, sodium difluoro (oxalato) borate, sodium fluoborate, sodium nitrate, sodium perchlorate and sodium difluorophosphate, and the solvation configuration of the sodium ion battery electrolyte prepared from the sodium salt composition is an aggregate with a multi-polar solvation shell layer, and a positive electrode surface solid electrolyte interface film (CEI) and a negative electrode surface solid electrolyte interface film (SEI) which are rich in inorganic matters can be formed, so that the positive electrode and the negative electrode are effectively protected, and the cycling stability and the rate capability of the sodium ion battery are improved.

The application provides a zinc phosphide negative electrode material, which comprises a zinc sheet substrate and a zinc phosphate protective layer; the zinc phosphate protective layer is obtained in situ on the surface of the zinc sheet by immersing the zinc sheet in a phosphoric acid solution; the phosphoric acid solution comprises phosphoric acid, zinc oxide, sodium fluoride, zinc nitrate, sodium perchlorate, organic ammonium and ammonia water. The zinc phosphide negative electrode material has good reversible deposition / dissolution performance, excellent energy storage performance, high stability and can be stably cycled for a long time.

The invention belongs to the field of sodium metal batteries, and particularly relates to a sodium metal battery and a high-entropy electrolyte thereof, the electrolyte comprises a high-entropy sodium salt and an ether solvent; the high-entropy sodium salt is a combined sodium salt containing more than four of a sodium salt A and a sodium salt B; wherein the sodium salt A comprises three sodium salts compounded by a formula 1 # imgabs0 # NaBH4 and NaFSI; the sodium salt B comprises at least one of sodium hexafluorophosphate, sodium bis (trifluoromethylsulfonyl) imide, sodium difluoro (oxalato) borate, sodium tetrafluoroborate, sodium nitrate, sodium bis (oxalato) borate, sodium difluorophosphate, sodium silicate and sodium perchlorate. The electrolyte provided by the invention can adapt to the characteristics of a sodium metal battery system, and can meet the application requirements of high magnification and wide temperature range.

The invention discloses a porous composite polymer solid electrolyte, a preparation method thereof and a solid sodium ion battery. The porous composite polymer solid electrolyte is prepared from a deep eutectic solvent, an additive, a polymer solution and a sodium super-ion conductor, the deep eutectic solvent is composed of a sodium ion-containing hydrogen bond receptor and a hydrogen bond donor, wherein the sodium ion-containing hydrogen bond receptor is selected from any one of sodium hexafluorophosphate, sodium tetrafluoroborate, sodium bis (oxalato) borate, sodium difluoro (oxalato) borate, sodium bis (trifluoromethanesulfonyl) imide, sodium bis (fluorosulfonyl) imide, sodium perchlorate, sodium nitrate, sodium chloride and sodium difluorophosphate; the additives are ethylene carbonate and propylene carbonate; the polymer solution is composed of a polymer and an organic solvent; the mass ratio of the sodium super-ion conductor to the polymer is 1: (2-5). The porous composite polymer solid electrolyte disclosed by the invention has excellent ionic conductivity and flame retardance, relatively strong mechanical property and excellent safety.

The invention discloses a low-temperature high-ionic-conductivity ether-ester composite sodium ion electrolyte and a preparation method thereof, and belongs to the technical field of energy storage battery materials, the electrolyte comprises ethylene glycol dimethyl ether, ethylene carbonate and methyl ethyl carbonate as basic solvents, and two brand-new modified compounds, namely methyl-2-(2, 2, 3, 3-tetrafluoropropoxy)-1, 2, 3, 4, 4-tetramethyl-1, 3, 4, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4- According to the invention, 2, 3-dioxolane-4-yl phosphonate and cyclo (2-hydroxypropyl-2 '-hydroxyethyl) sulfate are used as auxiliary materials, and fluoroethylene carbonate, sodium bis (fluorosulfonyl) imide and sodium perchlorate are used as auxiliary materials. Wherein the freezing point of fluoroether phosphonate is reduced through a fluorinated chain segment, and a phosphonic acid group promotes ion dissociation and stabilizes an interfacial film; the cyclic hydroxyl sulfonate inhibits molecular association through a cyclic structure, hydroxyl reduces the viscosity of a solvent, and sulfonate groups optimize the conductivity of an interfacial film. The prepared low-temperature high-ionic-conductivity ether-ester composite sodium ion electrolyte is high in ionic conductivity at low temperature, stable in interfacial film and long in cycle life.

The utility model discloses an anode demoulding mould for producing sodium perchlorate by electrolysis method, which relates to the field of sodium perchlorate anode material production, and comprises Ti4O7 powder and a pressing mould for pressing the Ti4O7 powder, the pressing mould comprises a supporting seat and a fixing block, a mixed material can be placed in a material pressing disc, and the material pressing disc can be pressed by starting an air cylinder. The telescopic end of the air cylinder extends downwards, the multiple round blocks are driven to extrude the mixed material in the material pressing disc to form the sheet-shaped electrode material, when the round blocks extrude the mixed material, the telescopic rod and the spring can be extruded at the same time, and after extrusion is completed, the telescopic end retracts, so that the sheet-shaped electrode material is formed. And the elastic force of the spring and the telescopic rod can automatically drive the lifting plate and the pressed sheet-shaped material to ascend, so that the material is prevented from being adhered to the interior of the material pressing disc, and the problem that the material is difficult to take out is reduced.

According to the sodium chlorate solution filter provided by the utility model, the structure of the sodium chlorate solution filter is improved, so that the filtering effect and the filtering efficiency of the sodium chlorate solution filter are improved. The sodium chlorate solution filter comprises a shell, a solution inlet pipe, a solution outlet pipe and a plurality of filter sticks, wherein the solution inlet pipe and the solution outlet pipe are communicated with the shell, the filter sticks are arranged in the shell, each filter stick comprises a supporting cylinder with an inner cavity, a plurality of liquid inlet holes are formed in the cylinder wall of each supporting cylinder, and the filter screens cover the liquid inlet holes; and the inner cavity of the supporting cylinder is directly or indirectly communicated with the solution outlet pipe. By the adoption of the sodium chlorate solution filter, the temperature resistance of the sodium chlorate solution filter can be remarkably improved, and the filtering effect and efficiency of the filter are improved.

The present application relates generally to processes, systems, and compositions for disposal of liquid elemental mercury (Hg0) collected during processes such as crude and natural gas processing. In one embodiment, the application pertains to a process for converting Hg0 to HgS. The process comprises electrolytically oxidizing an aqueous composition comprising Hg0 to form dissolved Hg2+ in the presence of a composition comprising acetylacetone; sodium perchlorate; and perchloric acid. The formed dissolved Hg2+ is reacted with Na2S to form HgS. The formed HgS may be separated using a solid-liquid separation process.

The invention provides an electrolyte of a high-safety sodium ion battery, which comprises the following components: a solvent which takes propylene carbonate (PC) as a main solvent and contains ethylene carbonate (EC) and dimethyl carbonate (DMC); the coalescing agent is fluoroethylene carbonate (FEC) and 1, 3-propane sultone (1, 3-PS); conducting salt: sodium perchlorate (NaClO4); additives: acesulfame sodium and a proper amount of sodium nitrate. The sodium ion battery provided by the invention has more excellent properties.

The present invention provides a uranium-containing tellurium tungstate, a preparation method and an application thereof, belonging to the technical field of new polyacid chemistry materials. The chemical formula of the present invention is [H2N(CH3)2] 14 Na4[(UO2)2(H2O)2(Te3W 21 O 75 H)2]·18H2O, belonging to the monoclinic system, space group P21 / n, and the unit cell parameters are: #imgabs0# α = γ = 90°, β = 89.899°, #imgabs1# Z = 4. After stirring sodium tungstate, sodium perchlorate and sodium tellurite in an aqueous solution, dimethylamine hydrochloride is added and the pH is adjusted, and then uranyl nitrate is added for a water bath reaction followed by post-treatment to obtain the uranium-containing tellurium tungstate. The uranium-containing tellurium tungstate of the present invention has a clear structure and good stability, and has photochromism. Its preparation process is simple and easy to operate.

The invention provides a preparation method and application of a mesoporous material Ce / Ti-UiO-66-NH2, and the preparation method comprises the following steps: 1) mixing a certain amount of template agent, ceric ammonium nitrate, terephthalic acid, TMB, acetic acid and sodium perchlorate, dissolving in deionized water, and reacting to obtain Ce-UiO-66; (2) adding a certain amount of tetrabutyl titanate into a N, N-dimethylformamide solution containing Ce-UiO-66, and carrying out hydrothermal reaction, so as to obtain a Ce / Ti-UiO-66 solid; and (3) carrying out ultrasonic treatment on a certain amount of 2-aminoterephthalic acid and the Ce / Ti-UiO-66 solid in a methanol solution to obtain a Ce / Ti-UiO-66-NH2 solid. According to the method, simple and convenient synthesis of mesoporous Ce-UiO-66 can be achieved, the problem that in the prior art, a mesoporous Ce-UiO-66 synthesis method is difficult is solved, the metal titanium ion-doped and amino-loaded Ce / Ti-UiO-66-NH2 mesoporous material is prepared, and meanwhile, a new material is provided for the fields of photocatalysis and the like.

The utility model relates to the technical field of sodium chlorate production, and discloses an electrolyte circulation adjusting device for sodium chlorate production, which comprises a bottom plate, the top of the bottom plate is fixedly connected with an operation box, the rear side of the operation box is fixedly connected with a filter assembly for cleaning, the top of the operation box is fixedly connected with a motor, and the motor is fixedly connected with a motor. The driving end of the motor is fixedly connected with a sector gear, the operation box is rotationally connected with a circular gear, the exterior of the circular gear is in meshed connection with the exterior of the sector gear, the interior of the circular gear is fixedly connected with a rotating column, and the exterior of the rotating column is fixedly connected with a rotating disc. Two containing barrels are fixedly connected to the interior of the rotating disc, and a fixing frame is fixedly connected to the top of the operation box. According to the utility model, the production quality and stability of sodium chlorate can be improved, and the product quality problem caused by material quantity fluctuation can be reduced.

The invention provides a heat treatment method of battery black powder, and belongs to the technical field of lithium battery recovery. The heat treatment method of the battery black powder comprises the following steps: pretreating the battery black powder to obtain a pretreated material; the temperature of the pretreatment is 100 to 400 DEG C; the pretreatment time is 10 to 120 minutes; mixing the pretreated material with an oxidizing agent, and roasting to obtain a black powder roasted material; the oxidizing agent is at least one of potassium permanganate, sodium peroxide, ferric oxide and sodium perchlorate; and the black powder roasting material is subjected to acid leaching, and a metal salt solution and solid-phase slag are obtained. Pretreatment is carried out at the temperature of 100-400 DEG C, so that volatile substances in the battery black powder are completely volatilized, and roasting is facilitated; an oxidizing agent is adopted for intensifying roasting, and organic components can be removed easily; graphite carbon can be oxidized into CO2 through roasting, the CO2 becomes loose and porous, follow-up leaching is facilitated, and therefore the solid-phase slag amount is reduced.

The invention relates to the technical field of electrocatalytic reduction of carbon dioxide, and discloses a method for preparing methylal by electrocatalytic reduction of carbon dioxide. According to the method, an H-type electrolytic tank is adopted as a reactor, and the H-type electrolytic tank comprises a cathode chamber and an anode chamber; a working electrode in the cathode chamber is a tin-based catalyst, the cathode chamber and the anode chamber are separated by a proton exchange membrane, and an electrolyte of the cathode chamber and the anode chamber is a sodium perchlorate-methanol solution; the method comprises the following steps: under an electrocatalytic reduction condition, introducing carbon dioxide into the cathode chamber, and carrying out electrocatalytic reduction to obtain methylal; and carrying out electrocatalytic oxidation on methanol in the electrolyte in the anode chamber to obtain methylal. The method for preparing methylal by electrocatalytic reduction of carbon dioxide provided by the invention has the advantages of high methylal selectivity, mild reaction conditions, environmental friendliness and the like.

The invention relates to the technical field of sodium perchlorate preparation, and discloses a plate net type electrolytic bath for sodium perchlorate preparation, the plate net type electrolytic bath comprises an electrolytic bath body and two top covers, the top covers on the two sides are clamped to the top of the electrolytic bath body, and air outlet pipes are fixedly connected to the middles of the top covers on the two sides; a bubble uniform precipitation triggering assembly used for uniformly regulating and controlling gas precipitated from the cathode and the anode is arranged in the electrolytic bath body; an anode protection adjusting assembly used for releasing the concentration of chlorine around the anode in real time is arranged in the side, close to the anode, of the gas outlet pipe; the positions and forms of hydrogen and chlorine generated in the cathode chamber and the anode chamber are detected through the ultrasonic sensor, the distance between the cathode plate and the anode plate is adjusted, heat in the electrolytic bath is neutralized, bubble aggregation of two gases in the cathode chamber and the anode chamber is avoided, uniform separation of the gases is facilitated, and the production efficiency is improved. And meanwhile, meshes of the nickel wire meshes on the two sides are treated through linkage adjustment, and normal proceeding of the subsequent electrolysis process is guaranteed.

The invention provides an electrolyte for a sodium-ion battery, and the electrolyte comprises a solvent which is a mixture of propylene carbonate (PC), fluoroethylene carbonate (FEC) and methyl trifluoroethyl carbonate (FEMC); the conductive salt is a mixture of sodium perchlorate (NaClO4) and sodium hexafluorophosphate (NaPF6); the additive comprises sodium nitrate (NaNO3) and acesulfame sodium. The sodium ion battery provided by the invention has higher cycling stability.

The invention discloses a preparation method of an infant milk powder-based chlorate and perchlorate standard sample, which comprises the following steps: step 1, accurately weighing sodium chlorate and sodium perchlorate high-purity substances, and adding into first-grade water to prepare chlorate and perchlorate solutions; step 2, quantitatively weighing matrix milk powder, adding primary water to restore the matrix milk powder into an emulsion, accurately and quantitatively adding chlorate and perchlorate solutions, and performing high-pressure homogenization to obtain an emulsion solution; step 3, drying the emulsion solution in the step 2 in a spray dryer with low air inlet temperature to obtain milk powder; and step 4, performing vacuum drying on the milk powder in the step 3 at low temperature until the water content in the milk powder does not exceed 2.0%. The invention also discloses a baby milk powder base chlorate and perchlorate standard sample which has the characteristics of uniformity, stability and accurate fixed value, and can be used for accurately and stably performing quality control on the detection process of the baby milk powder base chlorate and perchlorate.

The invention discloses a sodium-based ion eutectic solid electrolyte and an application thereof in a high-performance sodium metal battery, and belongs to the field of electrochemical energy storage. The electrolyte is formed by cocrystallizing sodium perchlorate and succinonitrile according to a molar ratio of 1: (2.6-3.2); an ordered-disordered coexisting crystal structure is constructed on the molecular scale: Na < + > and part of SN molecules and ClO4 <-> respectively occupy regular coordination skeleton sites, and extra SN molecules fill lattice gaps in an orientation disordered manner, so that a continuous three-dimensional sodium ion transmission channel is established, and anions are effectively fixed; naClO4 (SN) x can be subjected to in-situ fusion-infiltration-resolidification after the battery is assembled, electrode pores and interface gaps are fully filled, interface impedance is reduced, collaborative optimization of ion migration efficiency and interface compatibility is realized through eutectic structure design and an in-situ fusion process, and the performance of the battery is improved. The invention provides a solid electrolyte solution for safe and efficient operation of the sodium metal battery, and has a wide application prospect.

The invention discloses a method and a system suitable for producing sodium perchlorate in a high-altitude low-pressure low-oxygen environment, which can adapt to different low-pressure low-oxygen environments through three-stage ceramic membrane gradient filtration and electrolytic pressure enhanced oxygen supply without additional auxiliary equipment, and realize the purposes that the yield is greater than or equal to 85%, the product purity is greater than or equal to 99.6%, the chloride content is less than or equal to 0.12%, and the product purity is greater than or equal to 99.6%. The core defects that in the prior art, the high-altitude yield is low, impurity removal is not thorough, and adaptability is poor are effectively overcome. Salt lake potassium and lithium extraction waste tail salt is used as a main raw material, salty mud is recycled to be used as a building material, the mother liquor recycling rate is larger than or equal to 96%, no solid waste or waste water is discharged, tail gas reaches the standard, and the green development requirement is met. And the equipment investment is reduced by 13-15%, the annual maintenance cost is reduced by 29-36%, the energy consumption per ton of products is reduced to 820-845 kWh, and the economical efficiency is outstanding. Core equipment is mature, parameters can be adjusted along with the altitude through a built-in database, high-altitude low-maintenance scenes can be adapted, large-scale production can be achieved, product indexes are superior to industrial standards, and market competitiveness is high.

This invention discloses a qualitative and quantitative analysis method for heparin-like components in the biopharmaceutical field. The method includes using a liquid chromatograph, an SAX strong anion exchange column, sodium dihydrogen phosphate solution as mobile phase A, and mobile phase B consisting of mobile phase A containing sodium perchlorate, with gradient elution for monitoring and analysis. This invention improves the separation of heparin-like components by screening chromatographic packing materials, optimizing the chromatographic method, and optimizing the detection wavelength. It allows for accurate qualitative analysis of up to five heparin components using a simple liquid chromatography method. Furthermore, this invention incorporates the simulated separation function of the Glycomapping glycosylation software to reconstruct the elution peaks of components that do not reach baseline separation, and then achieves quantitative analysis of each separated component based on the external standard method. This qualitative and quantitative analysis method provides a feasible solution for component identification and content determination in heparin-like samples, and offers an important means for heparin quality control.

The invention discloses a three-dimensional cross-linked polymer electrolyte as well as a preparation method and application thereof, belongs to the technical field of batteries, and particularly relates to the three-dimensional cross-linked polymer electrolyte which comprises a three-dimensional cross-linked polymer formed by polymerizing an alkenyl-containing compound and sodium salt dispersed in the three-dimensional cross-linked polymer, the alkenyl-containing compound comprises an alkenyl-containing carbonic ester solvent, and the sodium salt comprises one or more of sodium hexafluorophosphate, sodium bis (trifluoromethanesulfonyl) imide, sodium perchlorate, sodium tetrafluoroborate, sodium bis (oxalato) borate, sodium oxalato difluoroborate and sodium bis (fluorosulfonyl) imide. The three-dimensional cross-linked polymer electrolyte disclosed by the invention can be used for preparing a battery, and the prepared battery is good in cycling stability and high in capacity retention ratio.

The application discloses a deep eutectic electrolyte and application thereof in a water-based sodium ion battery, which is prepared by mixing sodium perchlorate monohydrate, water and urea and stirring into a transparent solution, so as to obtain the deep eutectic electrolyte. 0.44 The dissolution of Mn in the MnO2 (NMO) helps to maintain the structural integrity of the NMO, and further improves the cycle performance and coulombic efficiency of the battery.

The application belongs to the technical field of sodium ion batteries, and particularly relates to a sodium salt composition, a sodium ion battery electrolyte and application thereof, and a sodium ion battery. The sodium salt composition provided by the application comprises any five or more of sodium bistrifluoromethylsulfonimide, sodium hexafluorophosphate, sodium difluoro(oxalato)borate, sodium fluoroborate, sodium nitrate, sodium perchlorate and sodium difluorophosphate. The solvation configuration of the sodium ion battery electrolyte prepared by using the sodium salt composition is an aggregate with a multi-polar solvation shell, can form an inorganic matter-rich positive electrode surface solid electrolyte interface film (CEI) and a negative electrode surface solid electrolyte interface film (SEI), effectively protects the positive electrode and the negative electrode, and improves the cycle stability and rate performance of the sodium ion battery.

The invention relates to the field of sodium-ion batteries, in particular to a wide-temperature-range sodium-ion battery electrolyte suitable for a hard carbon negative electrode and a preparation method and application of the wide-temperature-range sodium-ion battery electrolyte. The wide-temperature-range sodium-ion battery electrolyte suitable for the hard carbon negative electrode comprises sodium salt, an organic solvent and an additive, wherein the sodium salt is selected from sodium perchlorate; the organic solvent is composed of a solvent A and a solvent B, the solvent A is selected from propylene carbonate, and the solvent B is selected from ethyl propionate; the additive is selected from fluoroethylene carbonate. The sodium ion solvation structure is regulated and controlled by regulating and controlling the salt concentration, the cosolvent proportion and the additive proportion, then an interface passivation layer is precisely regulated and controlled, electrochemical decomposition is inhibited, interface impedance is reduced, the wide-temperature-range cosolvent electrolyte is developed, stable and reversible charging and discharging of a sodium ion battery at the temperature of 50 DEG C below zero to 70 DEG C are achieved, and the application scene of the battery is widened.

This invention discloses a novel method for detecting isomer impurities in dopamine agonists. The method employs high-performance liquid chromatography (HPLC), using a cyclodextrin-packed column, with sodium perchlorate buffer as mobile phase A and acetonitrile as mobile phase B. The test solution is injected into the HPLC system for isocratic elution. This invention overcomes the technical bias of requiring forward chromatography for isomer detection and separation, creatively exploring a method for analyzing and detecting isomer impurities in pramipexole hydrochloride tablets using reverse chromatography. The method offers advantages such as high specificity, high accuracy, good durability, and low reagent hazard, effectively filling a gap in the quality standards for pramipexole hydrochloride tablets. It provides a technical reference for the quality control of pramipexole hydrochloride tablets, ensuring medication safety.

The invention provides a modified electrolyte of a sodium-ion battery and the sodium-ion battery, relates to electric equipment, and relates to the field of sodium-ion batteries. The modified electrolyte of the sodium ion battery provided by the invention comprises an electrolyte solute and a basic electrolyte, and the electrolyte solute comprises acetylacetone salt; the basic electrolyte comprises sodium perchlorate, propylene carbonate and fluoroethylene carbonate; the acetylacetone salt comprises one or more of ferrous acetylacetonate, ferric acetylacetonate, manganese acetylacetonate and cobalt acetylacetonate. The structure collapse caused by the dissolution of transition metal ions in the circulation process of the Prussian blue material is inhibited through electrode liquid modification, so that the circulation stability is effectively improved.

The invention discloses a high-voltage sodium-ion battery electrolyte as well as a preparation method and application thereof, the electrolyte comprises sodium salt, a solvent, a diluent and an additive, and the sodium salt comprises main salt and auxiliary salt; the main salt comprises bis (fluorosulfonyl) imide sodium, and further comprises sodium hexafluorophosphate and at least one of bis (trifluoromethanesulfonyl) imide sodium, sodium tetrafluoroborate and sodium perchlorate; the auxiliary salt comprises sodium difluorophosphate; the solvent comprises a first solvent and a second solvent; the first solvent is fluoro-carbonic ester, and the second solvent is carboxylic ester or fluoro-carboxylic ester; the diluent is fluoroether or fluorobenzene; the concentration of the sodium salt in the electrolyte is 0.5-5.0 mol / L; the addition amount of the sodium bis (fluorosulfonyl) imide is more than 40wt% of the sodium salt; the molar ratio of the solvent to the sodium salt is less than 5: 1. According to the invention, the solvation structure of the electrolyte is regulated and controlled, the interface phase composition is optimized, the interface side reaction is effectively reduced, and the interface stability and the cycle life of the sodium-ion battery under high voltage are obviously improved and prolonged.

The present application relates to the technical field of hazardous waste treatment, and more particularly to a safe treatment method of discarded perchloric acid, comprising the following steps: step one, taking a certain amount of water, slowly adding perchloric acid to it to obtain pretreatment liquid A, reducing the danger and oxidizing property of the pretreated perchloric acid; step two, slowly adding sodium hydroxide solution to the pretreatment liquid A to neutralize the perchloric acid, so that sodium perchlorate is generated, obtaining mixed liquid B, and reducing the danger of high corrosiveness of the perchloric acid. In the present application, a safe treatment method of discarded perchloric acid is provided, which is a safe and stable treatment method for discarded perchloric acid. By controlling the reagent of the reaction system, the safe treatment of perchloric acid is realized through a multi-stage reaction process. The three wastes of the system are effectively collected and treated throughout the reaction process, so as to achieve a treatment method for safely operating the environment when disposing of perchloric acid.

The invention provides a water-based sodium-ion battery electrolyte and a preparation method and application thereof, and relates to the technical field of batteries, the electrolyte is composed of sodium perchlorate, water and an ether solvent, and has the characteristics of safety and non-combustibility. By accurately controlling the number and the state of water molecules in the electrolyte, most of the water molecules are bound in solvation sheaths of sodium ions, so that the number of free water molecules is reduced, and the phenomena of negative electrode hydrogen evolution and positive electrode active material degradation are effectively inhibited. In addition, the ether solvent can be decomposed on the positive electrode side in the first charging process to form a solid electrolyte layer, so that the influence of water molecules on the positive electrode active material is further inhibited. Based on the electrolyte provided by the invention, the aqueous sodium ion battery taking Na2FeFe (CN) 6 as a positive electrode and NaTi2 (PO4) 3 as a negative electrode shows excellent long cycle performance. The electrolyte is simple and convenient in preparation method, high in safety, low in cost and excellent in performance, and has important application value.