57 results about "Sodium hexafluorophosphate" patented technology

The present invention discloses a sodium ion battery negative electrode sheet, the negative electrode sheet is a porous graphite film structure, the diameter of the pores is from 2 to 30 microns, the distance between the centers of the circles of the pores is 5 to 50 microns, mass ratio of carbon atoms in the porous graphite film is greater than 99%, the negative electrode sheet may be used directly as the sodium ion battery negative electrode sheet, can avoid the use of a conductive agent, a binder and a metal collector, and has high capacity, corrosion resistance and good conductivity. The present invention also discloses a sodium ion battery using the negative electrode sheet, the sodium ion battery comprises a positive electrode sheet, a negative electrode sheet, a separator and an electrolyte, the sodium ion battery electrolyte solvent is one or more than one of diethanol dimethyl ether, dimethyl ether tetraethanol, and tetrahydrofuran, the electrolyte is one of sodium perchlorate, sodium hexafluorophosphate, sodium tetrafluoroborate and sodium trifluoromethanesulfonate, and the sodium ion battery is simple in production process and good in charging and discharging cycle stability, and has good prospects in the new energy field.

A material (hereinafter referred to as “positive electrode material”) including sodium manganate powder as a positive electrode active material, carbon black powder as a conductive agent, and polytetrafluoroethylene as a binder is prepared. The positive electrode material is mixed in an N-methylpyrrolidone solution to produce slurry as a positive electrode mixture. A working electrode is produced by applying the slurry on a positive electrode collector. A negative electrode containing tin or germanium is produced. The non-aqueous electrolyte is produced by adding sodium hexafluorophosphate as an electrolyte salt in a non-aqueous solvent produced by mixing ethylenecarbonate and diethyl carbonate.

The invention discloses a novel co-extraction system for extraction of lithium from high magnesium-lithium ratio bittern. The novel co-extraction system comprises an extraction agent and a co-extraction agent. The co-extraction agent is a mixture of one or more of potassium hexafluorophosphate, sodium hexafluorophosphate, magnesium hexafluorophosphate, calcium hexafluorophosphate, potassium fluoborate, sodium fluoborate, magnesium fluoborate and calcium fluoborate. The novel co-extraction method for extraction of lithium from high magnesium-lithium ratio bittern comprises extraction, back extraction, deposition for magnesium removal and deposition for lithium acquisition, wherein aiming at bittern with a magnesium-lithium ratio greater than 100, an elution process is used between extraction and back extraction. The novel co-extraction system has simple processes and a high lithium extraction rate, effectively reduces a magnesium-lithium ratio of bittern, has obvious advantages than the traditional ferric trichloride extraction system, can be used for extraction of lithium from salt lake bittern and is especially suitable for solving the problem of high difficulty of extraction of lithium from salt lake bittern with a high magnesium-lithium ratio.

The invention relates to a composite sodium-storage positive electrode for a solid-state secondary sodium battery and a preparation method for the composite sodium-storage positive electrode. The composite sodium-storage positive electrode comprises an electrode active substance selected from any one kind of sodium manganate and sodium-titanium phosphate, and a sodium ion conductor selected from any one kind of sodium perchlorate and sodium hexafiuorophosphate. The preparation method is simple in preparation process and low in cost; and the prepared solid-state secondary sodium battery operating at the room temperature is high in energy density and high in safety.

The invention discloses an electrolyte with a high solvent-sodium salt ratio and a sodium ion battery. The electrolyte comprises sodium salt, a solvent and an additive, wherein the molar ratio of the solvent to the sodium salt is (20: 1)-(70: 1), and the addition amount of the additive accounts for 0.5%-5% of the mass of the electrolyte; the sodium salt comprises one or more of sodium perchlorate (NaClO4), sodium tetrafluoroborate (NaBF4), sodium hexafluorophosphate (NaPF6), sodium hexafluoroarsenate (NaAsF6), sodium trifluoroacetate (CF3COONa), sodium tetraphenylborate (NaB(C6H5)4), sodium trifluoromethanesulfonate (NaSO3CF3), sodium bis (fluorosulfonyl) imide (Na[(FSO2)2N]) or sodium bis (trifluoromethanesulfonyl) imide (Na[(CF3SO2)2N]).

The invention discloses a preparation method of sodium hexafluorophosphate, which comprises the following steps: step 1, dissolving phosphorus pentoxide in a certain proportion in a hydrogen fluoride solution to generate a hexafluorophosphoric acid solution; step 2, slowly adding a sodium source in a certain proportion into the hexafluorophosphoric acid solution prepared in the step 1; step 3, heating the solution after the reaction in the step 2, and removing water and unreacted hydrogen fluoride by nitrogen stripping; and 4, heating and concentrating the mother liquor obtained in the step 3, dissolving the obtained sodium hexafluorophosphate crude product into a poor solvent for recrystallization, and cooling and drying to obtain sodium hexafluorophosphate with the purity of 99.87% or above. According to the method, sodium hexafluorophosphate is synthesized, reactants are a hydrogen fluoride solution, phosphorus pentoxide and a high-purity sodium source, common impurities in industrial production do not exist, the purity is high, raw materials are easy to obtain, the reaction is simple, the reaction process is easy to control, few three wastes are generated, the obtained product can be applied to a sodium ion battery, and dependence on a lithium ion battery is relieved.

The invention provides a water-retention gel electrolyte , a preparation method thereof, and a water-based supercapacitor and a preparation method and application thereof, and relates to the field of gel electrolytes and supercapacitors. The water-retention gel electrolyte provided by the invention is prepared from an electrolyte aqueous solution and an oxygen-containing functional group polymer. The electrolyte in the electrolyte aqueous solution is one or more of lithium perchlorate, bis(trifluoromethane)sulfonimide lithium salt, lithium hexafluorophosphate, lithium nitrate, sodium chloride, sodium perchlorate, bis(trifluoromethane)sulfonimide sodium salt, sodium hexafluorophosphate, sodium nitrate, potassium chloride, potassium perchlorate, bis(trifluoromethane)sulfonimide potassium salt, potassium hexafluorophosphate and potassium nitrate. The oxygen-containing functional group polymer is one or more of polyvinylpyrrolidone, polyethylene glycol, polyvinyl alcohol, carboxymethyl cellulose and polyacrylamide. The water-based supercapacitor based on the water-retention gel electrolyte has ultra-long cycle life at the normal temperature, and can be normally charged and discharged at the high temperature of 120 DEG C and stably circulated.

The invention in particular relates to a method for separating and detecting daclatasvir hydrochloride and optical isomers thereof. The method for separating and determining daclatasvir hydrochlorideand optical isomers thereof (impurities) by using liquid chromatography is characterized by comprising the following steps: adopting a chiral chromatographic column taking cellulose tris(3,5-dimethylphenylcarbamate) as a filler, and taking a mixed solution which takes sodium hexafiuorophosphate, potassium hexafluorophosphate, formic acid, acetic acid, phosphoric acid or aqueous phosphate solutionas an aqueous phase and takes acetonitrile or methanol as an organic phase as a mobile phase. According to the separating and detecting method disclosed by the invention, the daclatasvir hydrochlorideand optical isomers thereof (impurities) can be effectively separated, the degree of separation reaches 3.0 or higher, and complete baseline separation is realized, so that the quality of the daclatasvir hydrochloride can be accurately and effectively controlled. With the adoption of the separating method disclosed by the invention, the time of separating and detecting the daclatasvir hydrochloride and optical isomers thereof is within 30-80 minutes. The method disclosed by the invention has the advantages of being simple, rapid, accurate and the like.

The invention discloses an organelle-targeted aggregation-induced emission material and a preparation method thereof. The method comprises the following steps: 1) taking a triphenylamine borate and anaryl bromide compound as raw materials, fully and completely dissolving in a toluene solution, adding a potassium carbonate solution and ethanol solvent, taking tetrakis (triphenylphosphine) palladium as a reaction catalyst, carrying out nitrogen reaction, adding extraction, washing, removing of solvent, and carrying out column chromatography purification to obtain a target material; wherein whenthe aryl bromide compound in the step 1 is 2,5-dibromopyridine and 2, 5-dibromopyrazine, a product obtained in the step 1 and methyl iodide are taken as raw materials and are dissolved in toluene,heating reaction is carried out, toluene solvent is removed, then sodium hexafluorophosphate and acetonitrile are added to be fully dissolved, stirring is carried out for 12-24 hours at the room temperature, and a target fluorescent product can also be obtained after water washing, solvent removal under reduced pressure and recrystallization. The preparation and purification cost is low; the producthas excellent fluorescence emission performance, and can realize specific targeting imaging performance research of a plurality of organelles in cells.

The invention discloses non-aqueous electrolyte for inhibiting sodium-ion battery swelling as well as a preparation method and application thereof. The non-aqueous electrolyte comprises a sodium salt,an organic solvent and a first functional additive, wherein the molecular formula of the first functional additive is R1R2R3C3H3O3S; the content of the first functional additive in the non-aqueous electrolyte is 0.001-30wt%; the sodium salt refers to one or more of sodium hexafluorophosphate, sodium tetrafluoroborate, sodium hexafluoroarsenate, sodium borate dioxalate, sodium ditrifluoromethyl sulfonamide, sodium trifluoromethanesulfonate, sodium difluorosulfonimide or sodium perchlorate; the organic solvent refers to one or more of cyclic carbonate, chain linear carbonate, carboxylic ester or cyclic lactone.

The invention discloses a preparation method of a high-performance fishing net. The preparation method comprises operating steps as follows: (1), after being soaked with hot water for 3-5 h, the fishing net formed through weaving is immediately placed in a soaking solution at the temperature of 0 DEG C for 20-30 min, and the soaking solution is prepared from components in parts by weight as follows: 15-19 parts of sodium hexafluorophosphate, 7-10 parts of 1-chlorooctane, 6-8 parts of ammonium pentaborate and 220-250 parts of water; (2), after being taken out, the fishing net is soaked in a modifier for 6-8 h and then is dried, and a finished product is obtained. The preparation method of the high-performance fishing net is simple to operate, low in cost, safe and environmentally friendly, the raw materials are easily available, large-scale industrial production can be realized, the prepared high-performance fishing net is excellent in mechanical performance and anti-oxidative, particularly, the treated fishing net is free of odorous pungent smell, and the quality of the fishing net is greatly improved.

The invention discloses a method for utilizing plastic bottles to prepare non-woven fabric. The method includes the steps of (1) after the plastic bottles are cut into shreds, conducting treatment for removing taints and oil, putting the plastic bottle shreds into warm water, adding sodium hexafluorophosphate into the water, and taking out the plastic bottle shreds to conduct drying treatment after 25-35 min; (2) after the dried plastic bottle shreds are blended with addictives, conducting prilling, and then conducting melt-blow spinning to obtain finished products, wherein the weight ratio of the plastic bottle shreds to the addictives is 50-55 to 1. The method for utilizing the plastic bottles to prepare the non-woven fabric has the advantages of being simple in process procedures, capable of reducing production costs of the non-woven fabric effectively, and providing a new approach to development and utilization of waste plastic, and the non-woven fabric prepared according to the method is excellent in mechanical properties and long in service life.

A supercapacitor according to the present invention includes a negative carbon-comprising electrode which does not intercalate sodium, and a positive carbon-comprising electrode. An electrolyte composition comprises sodium hexafluorophosphate and a non-aqueous solvent comprising at least one selected from the group consisting of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, and tetraethylene glycol dimethyl ether. The supercapacitor has an electrochemical voltage window of from +0.0 V to 3.5 V (full cell voltage). The electrolyte has an electrochemical voltage window of from +0.05 V to 3.9 V vs. Na/Na+. A method of making and a method of operating a supercapacitor is also disclosed.

A rolled foil of surface roughened copper as thick as 26 μm for example having a surface formed into an irregular shape with copper precipitated thereon by an electrolytic method is prepared as a negative electrode collector. Tin (Sn) or germanium (Ge) is deposited on the rolled foil described above, so that a negative electrode active material layer is formed. Note that the deposited tin or germanium is amorphous. The arithmetic mean roughness Ra in the surface-roughened rolled foil described above is preferably not less than 0.1 μm nor more than 10 μm. A non-aqueous electrolyte is produced by adding sodium hexafluorophosphate as an electrolyte salt in a concentration of 1 mol/l to a non-aqueous solvent produced by mixing ethylene carbonate and diethyl carbonate in the ratio of 50:50 by volume.

The invention provides an additive for a sodium-ion battery electrolyte, the electrolyte and a sodium-ion battery, the additive comprises a first additive and a second additive, the first additive is a compound as shown in a formula I, and the second additive is a compound as shown in a formula II. Compared with the prior art, the sodium-ion battery electrolyte comprises at least two additives, so that the cycle performance and the rate capability of the battery can be obviously improved. Specifically, the first additive can spontaneously react with trace water and hydrofluoric acid in the electrolyte, so that the hydrolysis of sodium hexafluorophosphate is inhibited, the corrosion of hydrofluoric acid, phosphorus pentafluoride and other products on the positive electrode material is prevented, the stability of the material and the electrolyte is improved, and the electrochemical performance of the sodium-ion battery is improved; the second additive can form a stable interfacial film on the surfaces of the positive electrode and the negative electrode, and an organic sodium-rich interfacial film formed on the positive electrode can effectively inhibit transition metal in the positive electrode from being dissolved into electrolyte, so that the loss of active substances is reduced, and the resistance is improved.

The invention relates to a bipolar sodium ion battery and a preparation method thereof, the bipolar sodium ion battery comprises a plurality of bipolar pole pieces, a diaphragm and an electrolyte, the plurality of bipolar pole pieces are sequentially stacked, each bipolar pole piece comprises an aluminum foil, an insulating strip and an insulating layer, the aluminum foil is provided with a first surface and a second surface which are oppositely arranged, each of the first surface and the second surface comprises a positive electrode region, a bending region and a negative electrode region which are sequentially arranged, the positive electrode region is coated with a positive electrode active layer, and the negative electrode region is coated with hard carbon; the positive electrode active layer comprises a transition metal oxide, a Prussian blue material, a polyanion compound or an amorphous material; the aluminum foils can be folded along the bending area, so that the positive electrode region and the negative electrode region are arranged oppositely; the insulating strip is arranged in the bending region; the insulating layer is clamped between the positive active layer and the hard carbon; a diaphragm is arranged between every two adjacent bipolar pole pieces; and the electrolyte is used for conducting electricity for the positive electrode active layer and the hard carbon and comprises sodium hexafluorophosphate. The bipolar sodium ion battery is high in energy density and long in service life.

The invention discloses a method for electrolytic wax removal from an automobile covering part. The method comprises the following operation steps: 1, an electrolytic wax removal solution is prepared, 4-trimethylsilyl styrene, sodium methallyl sulfonate, diethylene glycol chloroformate, a nonionic surfactant, a diffusion agent, tetrabutyl ammonium fluoride, sodium hexafluorophosphate and water are uniformly mixed, and then are continuously stirred for 30-40 minutes by adopting the rotate speed of 400-500 r/min; and 2, electrolysis is carried out, a workpiece is subjected to cathode electrolysis for 2-4 minutes, and is subjected to anode electrolysis for 1-2 minutes, then the workpiece is washed by hot water at the temperature of 50-60 DEG C, and the electrolytic wax removal is completed. The method for the electrolytic wax removal from the automobile covering part has the advantages that the electrolytic wax removal solution is green and environment-friendly, the wax removal effect is remarkable so that the wax on the workpiece surface can fall off quickly, and the service life of the wax removal solution can be effectively prolonged.

The invention discloses an anti-freezing agent for concrete and a preparation method of the anti-freezing agent. The anti-freezing agent for concrete is prepared from raw materials in parts by weightas follows: 12-18 parts of methylpentanolone, 8-12 parts of succinimide, 5.4-6.6 parts of mushroom alcohol, 4.6-6.2 parts of sodium hexafluorophosphate, 3.8-5.4 parts of tri-isopropanolamine, 2.4-4 parts of expanded perlite and 1.5-3.5 parts of N-vinyl pyrrolidone. The anti-freezing agent is prepared from methylpentanolone, succinimide, mushroom alcohol, sodium hexafluorophosphate, tri-isopropanolamine, expanded perlite and N-vinyl pyrrolidone with the preparation method, can normally work at the temperature of subzero 30 DEG C, notably improves the anti-freezing performance when used in concrete, can improve the compressive strength and water reduction performance of the concrete and has good compatibility with the concrete. The preparation method adopts a simple preparation process and is convenient to operate, prone to industrial production and worth popularization.