43 results about "Sodium perchlorate" patented technology

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.

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 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 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 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.

This invention discloses a wide-temperature-range, long-life sodium-ion battery electrolyte, its preparation method, and its applications. The invention uses sodium perchlorate as the sodium salt, synergistically with low-viscosity, low-melting-point methyl acetate to ensure high ionic conductivity of the electrolyte over a wide temperature range. Simultaneously, dimethyl sulfite and fluoroethylene carbonate synergistically construct an inorganic-rich SEI film, significantly improving interfacial stability and cycle performance. The Na||NVP battery, after reversible charge-discharge at 60°C, maintained a discharge specific capacity retention of 88.33% of the initial capacity after 400 stable cycles. Under low-temperature conditions, reversible charge-discharge at currents of 0.1C and 0.3C resulted in stable cycles of 300 and 380 cycles, respectively. The preparation method of this invention is simple, low-cost, easy to implement, requires minimal equipment investment, and is suitable for mass production.

The application discloses a kind of porous composite polymer solid electrolyte and preparation method and solid sodium ion battery thereof.The porous composite polymer solid electrolyte of the application is made of deep eutectic solvent, additive, polymer solution and sodium superionic conductor;The deep eutectic solvent is composed of sodium ion-containing hydrogen bond acceptor and hydrogen bond donor, the sodium ion-containing hydrogen bond acceptor is selected from any one of sodium hexafluorophosphate, sodium tetrafluoroborate, sodium dihydrogen phosphate, sodium difluoro oxalate borate, sodium bis-trifluoromethyl sulfonamide, sodium bisfluorosulfonamide, sodium perchlorate, sodium nitrate, sodium chloride and sodium difluorophosphate;The additive is ethylene carbonate and propylene carbonate;The polymer solution is composed of polymer and organic solvent;The mass ratio of sodium superionic conductor and polymer is 1: (2-5).The porous composite polymer solid electrolyte of the application has excellent ion conductivity, flame retardancy, strong mechanical properties and excellent safety.

The invention discloses a method for measuring residual quantity of residual impurities DMAP and EDU in synthesis of antitumor drugs, and belongs to the technical field of drug analysis. According to the method, high performance liquid chromatography is adopted for detection; dimethyl sulfoxide is used as a solvent to dissolve the sample for detection; detection conditions of the high performance liquid chromatography are as follows: a chromatographic column is an octadecyl bonded silica gel column; the mobile phase A is a sodium perchlorate buffer solution or a potassium hexafluorophosphate buffer solution; the mobile phase B is acetonitrile; the detector is an ultraviolet detector; the detection wavelength for detecting the DMAP is 278 to 282 nm, and the detection wavelength for detecting the EDU is 198 to 202 nm; a gradient elution mode is adopted. The method is used for detecting DMAP and EDU residues in the raw material medicine, is high in sensitivity and accuracy, does not need a special column, can meet the control limit of the ICH guidance principle on genotoxic impurities and general impurities of the raw material medicine, provides reliable guarantee for impurity control of the raw material medicine, and further guarantees the safety of clinical medication.

The invention discloses a preparation method and application of a nano-porous ceramic rare earth-based denitration and dechlorobenzene catalyst. The catalyst takes a composite oxide of titanium dioxide and magnesium oxide as a carrier, takes a composite oxide of nickel oxide and cerium dioxide as an active component, takes bacillus subtilis as a structure-directing agent and takes magnesium powder as a combustion agent; according to the invention, sodium perchlorate is taken as an initiator, ammonium bicarbonate is taken as a pore-forming agent, and a biological template method, a freezing pore-forming method, a self-propagating high-temperature synthesis method and an impregnation loading method are combined for preparation. The catalyst synthesized by the invention has the advantages of large specific surface area, sufficient exposure of active sites and the like, and can realize simultaneous denitration and chlorobenzene removal of complex flue gas in the non-electric industry.

The invention relates to the field of sodium ion batteries, and discloses an electrolyte and a sodium ion battery. The electrolyte comprises a sodium salt, an organic solvent, a fluorine-containing additive and an optional flame retardant; wherein the sodium salt comprises main sodium salt and auxiliary sodium salt; the main sodium salt is sodium hexafluorophosphate and / or sodium perchlorate; the auxiliary sodium salt is selected from at least one of sodium difluoro (oxalato) borate, sodium bis (trifluoromethylsulfonyl) imide, sodium bis (fluorosulfonyl) imide, sodium tetrafluoroborate, sodium trifluoromethanesulfonate, sodium carbonate, sodium fluoride, sodium difluorophosphate and sodium bis (oxalato) borate; in the electrolyte, the molar ratio of the auxiliary sodium salt in terms of sodium element to the main sodium salt in terms of sodium element is 1: (2-20). According to the electrolyte, the main sodium salt and the auxiliary sodium salt are matched with the fluorine-containing additive, so that the first coulombic efficiency, the normal-temperature cycle retention rate and the cycle retention rate at the temperature of 45 DEG C of the prepared battery are remarkably improved.

The invention discloses an electrolyte for a NaNixFeyMnzO2 sodium ion battery. The electrolyte comprises the following components: an organic solvent, a sodium salt and a Fe < 3 + > inhibition type additive, the organic solvent is composed of two or three of cyclic carbonate, chain carbonate and chain ether; the sodium salt is one or more of sodium hexafluorophosphate, sodium perchlorate and sodium tetrafluoroborate; and the Fe < 3 + > inhibition type additive is one or two of total thia-15-crown-5 and nitrogen-containing benzene-15-crown-5. The invention further discloses a preparation method of the catalyst. According to the invention, by introducing total thia-15-crown-5 or / and nitrogenous benzo-15-crown-5 as the Fe < 3 + > inhibition type additive, the high-temperature performance of the NaNixFeyMnzO2 sodium ion battery can be remarkably improved from the following three aspects: the high-temperature cycle life is remarkably prolonged, the cycle index is improved from 250-350 times of the existing system to 600-700 times when the battery discharge retention rate is reduced to 80% at 60 DEG C and 1C charge-discharge rate, and the battery performance is greatly improved. The cycling stability is improved by 1.2 to 1.8 times; in the storage process, the amount of gas (CO2 and CH4) generated by electrolyte decomposition is reduced by 70%.

This invention discloses a hierarchical porous HKUST-1 material for efficient iodine capture and its hydrothermal synthesis method. The synthesis process involves sequentially dissolving a template agent, carboxylic acid, and sodium perchlorate in water, then adding a copper source and an organic ligand. The mixture is reacted at 90°C for 24 hours. After the reaction, the solid is separated by centrifugation, the template agent is removed by Soxhlet extraction, and the material is dried to obtain the hierarchical porous HKUST-1 material. The hierarchical porous HKUST-1 material synthesized by this invention has ordered mesopores with a size of 8-20 nm, which promotes rapid iodine transfer within the material and provides more storage space, thereby achieving efficient iodine capture.

The invention discloses a closed-loop circulation system for centrifugal mother liquor in a perchlorate production process. The closed-loop circulation system comprises a crystallizer, a centrifugal head tank, a centrifugal machine, a mother liquor intermediate tank, a cyclone hydraulic separator, a mother liquor storage tank, a mother liquor mixing tank and a plurality of material conveying pipelines. Crystal mush discharged from the crystallizer sequentially enters the centrifugal head tank and the centrifugal machine to realize solid-liquid separation, mother liquor discharged from a liquid phase of the centrifugal machine is temporarily stored in the mother liquor middle tank and then is subjected to secondary solid-liquid separation by the cyclone hydraulic separator, and clear liquor used for reflowing a front-end refining section and mixed liquor used for returning to a crystallization section are obtained. And the mixed liquid is mixed with sodium perchlorate electrolyte from an electrolysis section in the mother liquid mixing tank and then conveyed back to the crystallizer by a crystallizer feeding pump. By means of the structure, soluble sodium perchlorate can be recycled, insoluble impurities are discharged at the crystallization section, full-amount closed-loop circulation of centrifugal mother liquor is achieved, the impurities are prevented from entering a refining section, and the operation stability of the system is improved.