28 results about "Zinc bromide" patented technology

The invention belongs to the technical field of electrochemical energy storage, and provides a negative electrode electrolyte, a preparation method thereof and a zinc-bromine flow battery. The negative electrode electrolyte comprises the following components: zinc bromide, supporting electrolyte, a negative electrode additive and water, and the negative electrode additive comprises malic acid; and the concentrations of the zinc bromide, the supporting electrolyte and the malic acid in the negative electrode electrolyte are 2.0 to 2.5 mol / L, 2.0 to 3.0 mol / L and 0.02 to 0.04 mol / L respectively. Zinc dendrites and hydrogen evolution reaction are effectively inhibited, and cooperative improvement of coulombic efficiency, voltage efficiency and energy efficiency is achieved. Therefore, the malic acid is introduced into the negative electrode electrolyte, so that the zinc dendrite and hydrogen evolution reaction in the zinc-bromine flow battery can be effectively inhibited, and the cooperative improvement of coulombic efficiency, voltage efficiency and energy efficiency is realized.

The invention discloses a novel sodium ion battery halide solid electrolyte, and belongs to the technical field of electrolyte materials, the molecular formula of the halide solid electrolyte is NaXTaCl5FX, X is equal to 1-3, the halide solid electrolyte is weighed according to the molar ratio of tantalum chloride to sodium fluoride under the protection of argon, and electrolyte matrix mixed powder is obtained through high-energy ball milling; carrying out ball milling on nano silicon dioxide and zinc bromide according to a molar ratio to prepare a sintering aid; the electrolyte matrix mixed powder is pressed into a biscuit piece, and the biscuit piece is subjected to heat treatment in argon to obtain a halide electrolyte matrix; and finally, grinding the halide electrolyte matrix, doping a sintering aid, tabletting, sintering and ball-milling to obtain the novel sodium-ion battery halide solid electrolyte. And densification and structural stability of the material are synergistically realized, and finally the solid electrolyte with high ionic conductivity and wide electrochemical window is obtained.

The present invention discloses a method and system for producing hexafluorobutadiene, which includes the following steps: In step (1), an organic solution of bromotrifluoroethylene and zinc powder are respectively introduced into a first reactor containing an initiator, zinc powder, and an organic solvent, followed by a second reactor, and reacted to obtain a trifluorovinylzinc bromide solution. The reaction solution is then introduced into a precipitator to separate excess zinc powder, resulting in a zinc-free trifluorovinylzinc bromide solution. The excess zinc powder is then filtered and reused. In step (2), the trifluorovinylzinc bromide solution obtained above and a pre-prepared composite catalyst solution are introduced into a third reactor and subjected to a coupling reaction to obtain crude hexafluorobutadiene. In step (3), the crude hexafluorobutadiene obtained above is purified to obtain a product with a purity of ≥ 99.9%.

The preparation method comprises the following steps: after a micro electrode is prepared through 3D printing, iodine is loaded on the surface of the micro electrode to form an iodine positive electrode; preparing a zinc negative electrode matched with the iodine positive electrode in shape through laser engraving; uniformly mixing water, hyaluronic acid, hydrophilic silicon dioxide, zinc perchlorate and zinc bromide to form a gel electrolyte; and sequentially laminating the iodine positive electrode, the gel electrolyte and the zinc negative electrode on the substrate, and packaging to obtain the wide-temperature-range micro zinc-iodine battery. According to the gel electrolyte disclosed by the invention, hyaluronic acid and hydrophilic silicon dioxide lock water through hydrogen bonds formed between hyaluronic acid and hydrophilic silicon dioxide and water molecules, evaporation of water at a high temperature is inhibited, perchlorate inhibits solidification of water at a low temperature by destroying hydrogen bond structures between water molecules in a gel network, and a wide temperature range of a miniature battery is realized; meanwhile, bromide ions in the electrolyte are transmitted to a positive electrode through an interface to excite a four-electron reaction of iodine, so that the energy density of the micro zinc-iodine battery is improved.

An electrolyte of a static zinc-based battery, includes a) zinc bromide in molar concentration from 1.5M to 3.0M, b) tetraethylammonium bromide as a bromine complexing agent in half of the molar concentration of the zinc bromide, c) a glycol based anti-freezing agent in molar concentration from 1.0M to 2.0M, d) zinc chloride as supporting ionic conducting agent in molar concentration from 1.0M to 4.0M, and e) an additional supporting ionic conducting agent in molar concentration from about 2.0M to 4.0M. The electrolyte minimizes the self-discharge of the static zinc-based battery and improves the energy density of the static zinc-based battery.

The application provides a kind of alkaline zinc iron liquid flow battery electrolyte and its application, belong to liquid flow battery technical field.The negative electrode electrolyte of the application is prepared into suspension by dissolving zinc bromide in strong alkali solution;The concentration difference exists in the alkali concentration of positive and negative electrode electrolyte, and the alkali concentration of positive electrode electrolyte is lower than that in negative electrode electrolyte.The use of positive and negative electrode electrolyte of the application can effectively alleviate the migration problem of alkaline zinc iron liquid flow battery electrolyte, improve the energy density of negative electrode electrolyte, widen the applicable temperature range of battery, and improve the reliability of battery.

The application belongs to the technical field of electrochemical energy storage, and provides a negative electrolyte, a preparation method thereof and a zinc-bromine flow battery. The components of the negative electrolyte include zinc bromide, a supporting electrolyte, a negative electrode additive and water, the negative electrode additive includes malic acid, the concentrations of the zinc bromide, the supporting electrolyte and the malic acid in the negative electrolyte are 2.0-2.5 mol / L, 2.0-3.0 mol / L and 0.02-0.04 mol / L respectively. The zinc dendrite and hydrogen evolution reaction are effectively inhibited, and the synergistic improvement of coulombic efficiency, voltage efficiency and energy efficiency is realized. Therefore, by introducing malic acid into the negative electrolyte, the zinc dendrite and hydrogen evolution reaction in the zinc-bromine flow battery can be effectively inhibited, and the synergistic improvement of coulombic efficiency, voltage efficiency and energy efficiency is realized.

The application discloses a kind of non-fiber flame-retardant polyamide compositions and preparation method and application thereof, and it is related to the technical field of engineering plastics.A kind of non-fiber flame-retardant polyamide composition includes the following weight parts of components: polyamide resin 55-81 parts;Bromine flame retardant 19-42 parts;Zinc borate 4-12 parts;Antimony white 1-12 parts;Zinc bromide 0.1-0.6 parts;The viscosity of the polyamide resin is 2.4-2.7.The non-fiber flame-retardant polyamide composition of the application can reach 5VA flame-retardant grade, while improving the flame-retardant property without affecting its appearance gloss and mirror effect.

The application discloses a method for preparing 4-halogen-2-methyl-2-butenoic acid alkyl ester, which is prepared by a Reformatsky reaction with halogenated acetaldehyde and 2-bromine zinc propionate as raw materials. The reaction has mild conditions, good economy, no toxicity and harm, and high safety factor, and is suitable for industrial large-scale production. The Reformatsky S reaction and the subsequent dehydration reaction generate mainly inorganic solid waste zinc halide as well as a small amount of organic by-products, and the reaction solvent can be recycled, so that the pollution is very small.

The invention belongs to the technical field of zinc-bromine batteries, and particularly relates to an electrolyte for a zinc-bromine battery, the electrolyte comprises a positive electrolyte and a negative electrolyte, the positive electrolyte and the negative electrolyte are both composed of an additive, zinc bromide, a supporting electrolyte and deionized water; the additive is 1-ethyl-2, 3-dimethylimidazolium bromide, and the concentration of the additive is 0.5 mol / L to 2.0 mol / L; the concentration of the zinc bromide is 1.0 mol / L to 5.0 mol / L; the molar ratio of the additive to the zinc bromide is (0.1: 1)-(1.0: 1); and the concentration of the supporting electrolyte is 1.0 mol / L to 5.0 mol / L. The additive can remarkably regulate and control the zinc deposition behavior and improve the reversibility of zinc deposition / stripping, so that the long-cycle stability of the battery is greatly improved. After the additive is applied to the zinc-bromine battery, the coulombic efficiency is still kept not lower than 99.8% after 500 cycles under the current density of 5 mA / cm < 2 >.

The application discloses a wide-temperature-range micro zinc-iodine battery and a preparation method thereof, and comprises the following steps: after a micro electrode is prepared through 3D printing, an iodine anode is formed by loading iodine on the surface of the micro electrode; a zinc cathode matching the shape of the iodine anode is prepared through laser engraving; water, hyaluronic acid, hydrophilic silicon dioxide, zinc perchlorate and zinc bromide are uniformly mixed to form a gel electrolyte; the iodine anode, the gel electrolyte and the zinc cathode are sequentially laminated on a substrate, and then the wide-temperature-range micro zinc-iodine battery is obtained after packaging. In the gel electrolyte, the hyaluronic acid and the hydrophilic silicon dioxide lock water through hydrogen bonds with water molecules, inhibit the evaporation of water at high temperature, and the perchlorate ion inhibits the freezing of water at low temperature by destroying the hydrogen bond structure between water molecules in the gel network, so that the wide-temperature-range micro battery is realized; meanwhile, the bromide ion in the electrolyte is transmitted to the anode through the interface to excite the four-electron reaction of iodine, so that the energy density of the micro zinc-iodine battery is improved.

The application belongs to the technical field of batteries, and discloses a local high-concentration ionic liquid electrolyte, a preparation method thereof and an assembled high-voltage zinc-tellurium battery. The electrolyte comprises an ionic liquid, zinc bromide, zinc fluoride and an organic cosolvent; the ionic liquid is one or more of 1-vinyl-3-butyl imidazolium bromide, 1-ethyl-3-methyl imidazolium bromide, 1-propyl-3-methyl imidazolium bromide or 1-butyl-3-methyl imidazolium bromide. The local high-concentration ionic liquid electrolyte contains active species ZnBr4 2‑ , which can activate the positive-valence conversion of tellurium, play the effect of exciting and stabilizing the Te 0 / Te 4+ redox pair. The zinc-tellurium battery assembled thereby can realize the two-step conversion reaction of Te 4+ / Te and Te / Te 2‑ of the tellurium positive electrode, improve the energy output of the battery, increase the high-voltage discharge platform capacity ratio of the zinc-tellurium battery to 80.6%, and improve the rate performance of the zinc-tellurium battery.

The invention provides a preparation method of spirolactone, and relates to the technical field of organic synthesis. The preparation method of spirolactone provided by the invention comprises the following steps: taking 4-androstene-3, 17-diketone as a raw material, carrying out nucleophilic addition reaction on the 4-androstene-3, 17-diketone and an organic zinc reagent 3-tert-butoxy-3-oxypropyl zinc bromide, then carrying out elimination-lactonization under the catalysis of trifluoroacetic acid, and completing lactonization while removing tert-butyl; then sequentially carrying out etherification reaction and oxidative dehydrogenation reaction to obtain canrenone, and finally carrying out addition reaction on canrenone and thioacetic acid to obtain spirolactone. The preparation method provided by the invention provides a novel construction method of 21-carboxylic acid-gamma-lactone, the method is good in specificity, the total mass yield of spirolactone is greater than 92%, and the total mass yield is high; moreover, the HPLC purity of the spirolactone prepared by the preparation method provided by the invention is greater than 99.7%, which is far higher than the purity of the spirolactone prepared by the existing process.

The invention belongs to the technical field of flow batteries, and particularly relates to a zinc-bromine flow battery electrolyte as well as a preparation method and application thereof. The zinc-bromine flow battery electrolyte comprises zinc bromide, a supporting electrolyte, a bromine complexing agent, a sulphobetaine type additive, a first additive and water, the first additive is dimethyl sulfoxide, choline bromide, polyethylene glycol or 1, 2-propylene glycol. According to the zinc-bromine flow battery electrolyte, the shuttle effect of polybromide ions and the growth of zinc dendrites are effectively inhibited, the self-discharge rate of the battery is greatly reduced, and the coulombic efficiency, the voltage efficiency and the energy efficiency are also remarkably improved.

The invention provides a method for preparing isopulegol from citral, which is characterized in that citral is used as an initial raw material, a non-metal carbon material is used as a catalyst, a chiral pyridine or pyrrole compound and zinc bromide are added as cocatalysts, and under the action of a hydrogen atmosphere containing carbon monoxide, the citral is subjected to a hydrogen cyclization reaction to prepare the isopulegol. The method provided by the invention realizes direct synthesis of isopulegol from citral, and is mild in reaction condition, high in conversion rate and selectivity, and suitable for industrial production and application.

The invention relates to the field of the oil production industry, and more particularly to heavy well kill fluids containing at least one of the compounds: calcium bromide, barium bromide, magnesium bromide, strontium bromide, zinc bromide, calcium iodide, barium iodide, magnesium iodide, strontium iodide and zinc iodide, and to methods for producing same. The invention discloses a method which makes it possible to broaden the range of components that can be used to produce heavy kill fluids. The claimed method makes it possible to produce a heavy well kill fluid using accessible salt solutions, wherein the resulting fluid has the necessary properties for effectively killing wells. The claimed method includes mixing solutions of salts at a molar ratio of 0.5-1.3:2, evaporating the resulting mixed solution to a density of 1400-2650 kg / m3, cooling the evaporated solution to a temperature of less than 25°C to form a precipitate, and filtering the evaporated solution to obtain a filtrate in the form of a heavy well kill fluid.

The invention relates to a zinc ion battery electrolyte and a zinc metal negative electrode passivation layer constructed by the same. A reference electrolyte is prepared from any one or more of zinc sulfate, zinc bromide, zinc nitrate, zinc chloride, zinc perchlorate, zinc trifluoromethanesulfonate, bis (trifluoromethanesulfonimide) zinc salt and zinc acetate according to any proportion; and the electrolyte additive is 3, 3 '-thiodipropionic acid or 3, 3'-dithiodipropionic acid. The electrolyte provided by the invention generates a passivation layer capable of being repaired in situ through in-situ chemical reaction with a zinc metal electrode. The passivation layer effectively solves the problems of zinc dendrite, zinc corrosion and the like, remarkably enhances the tolerance of a zinc metal electrode to surface defects, and improves the cycle performance and the service life of the water-based zinc ion battery. In addition, the additive provided by the invention is wide in source, green and pollution-free, and meanwhile, the zinc ion battery provided by the invention is simple in preparation process, low in cost and easy to industrialize.

A zinc bromide electrochemical cell comprises an anode assembly, a cathode assembly, and a container. The anode assembly comprises an anode pouch comprising a first insulating microporous membrane. An anode is enclosed in the anode pouch. The cathode assembly comprises a cathode pouch comprising a second insulating microporous membrane. A cathode is enclosed in the cathode pouch. A first plurality of protrusion elements are on the first insulating microporous membrane. A second plurality of protrusion elements are on the second insulating microporous membrane.

The application discloses a preparation method of hexafluorobutadiene, and comprises the following steps: under the action of a catalyst, trifluorobromoethylene and trifluorovinyl zinc bromide are coupled in a reactor to obtain hexafluorobutadiene, wherein the catalyst is a cuprous salt catalyst, and the reaction temperature is 25-150 DEG C. The application has the advantages of simple operation, low raw material cost, high product yield and the like.

The application discloses a non-hydrogen-evolution non-aqueous electrolyte zinc-bromine battery, which comprises a positive electrode, a negative electrode, an electrolyte and a diaphragm. The positive electrode is a porous conductive support electrode, and the surface of the positive electrode is coated with a composite slurry containing a bromine complexing agent and activated carbon; the negative electrode is a zinc foil; the electrolyte is a non-aqueous organic electrolyte, which comprises a mixed solvent of acetonitrile and tetrahydrofuran, zinc bromide main salt, lithium bis-trifluoromethanesulfonimide or lithium bis-fluoromethanesulfonimide conductive salt and an alkyl or benzyl bromide ammonium cationic surfactant complexing agent. The application adopts an aprotic organic solvent, avoids the electrolytic reaction of water, solves the hydrogen evolution problem of a traditional water-based zinc-bromine battery, eliminates the safety hazard, and significantly improves the solubility and ionic conductivity of zinc bromide in a mixed solvent system. The complexing agent in the positive electrode and the electrolyte can effectively complex bromine and reduce self-discharge. The coulombic efficiency of the battery is stable at more than 92%, the capacity retention rate is greater than 90% after 100 cycles, and the battery exhibits excellent safety performance and cycle stability.

The present application provides a method for producing hexafluorobutadiene. The method includes the following steps: In step (1), a trifluorovinyl zinc bromide solution, a catalyst, and a first organic solvent are placed in a pressure-resistant reactor, and the reactor is purged with an inert gas. Then, bromotrifluoroethylene is added and reacted to obtain hexafluorobutadiene. Here, a polar aprotic organic solvent is used as the first organic solvent. In step (2), after the reaction is complete, the gaseous material is passed through a circulating shower system containing a second organic solvent to absorb excess bromotrifluoroethylene and fluorine-containing olefin impurities, and the unabsorbed hexafluorobutadiene crude product is purified by rectification. Here, the second organic solvent is selected from polar aprotic organic solvents and ionic liquids.

The application discloses an application of a tripyridyl triazine zinc bromide complex in preparation of a photoelectric / radiation detector and belongs to the technical field of semiconductor photoelectric materials and devices. The application opens up a new use of a known material, the tripyridyl triazine zinc bromide complex, and realizes regulation of carrier transport performance by using free radicals generated by photoinduced electron transfer (PIET) in the ZnBr2(2-TPT) complex for the first time, breaks through the traditional cognition that the material is only used for optical discoloration, and successfully applies the material to the field of electrical detection. The photoelectric / radiation detector based on the tripyridyl triazine zinc bromide complex has high-performance detection performance: the detector prepared based on the ZnBr2(2-TPT) complex has extremely low dark current (originating from high resistance of the material in a dark state) and significant photocurrent response, realizes high on-off ratio and high sensitivity, and can effectively detect weak ultraviolet light and high-energy X rays.

The present disclosure provides various characteristics of a method for the production of an ultra-pure zinc bromide and zinc chloride fluid blend in a reactor system, having reduced metal impurities for the use in battery electrolyte blends, by reacting chlorine with a mixture of zinc bromide and zinc. The method disclosed can be used in continuous flow or batch processing and uses a zinc bromide to aqueous solution as catalyst in a reaction with chlorine. Chlorine, whether in liquid or gas form, added into a reactor at a controlled rate reacts with bromide to generate bromine in a much faster rate that when the zinc bromide to aqueous solution would not be present. Any un-reacted zinc is then filtered out which will ultimately result in the ultra-pure zinc bromide and zinc chloride fluid blend.

This invention discloses a synthesis process for hexa(trimethylsilylacetylenol)benzene, comprising the following steps: Step 1: Trimethylsilylacetylenol reacts with alkyllithium to generate lithium trimethylsilylacetylenol; Step 2: Lithium trimethylsilylacetylenol reacts with anhydrous chlorine / zinc bromide to generate trimethylsilylacetylenol chloride / zinc bromide; Step 3: Trimethylsilylacetylenol chloride / zinc bromide reacts with hexabromobenzene to generate hexa(trimethylsilylacetylenol)benzene; Step 4: Purification of hexa(trimethylsilylacetylenol)benzene. The method disclosed in this invention raises the reaction temperature to -10 to -40°C (ice-salt bath or cold solvent bath), reducing the energy consumption required for the reaction, which is beneficial for the large-scale and industrial application of the reaction. The use of heating promotes complete dissolution of zinc chloride, which is beneficial for increasing the yield. This invention employs a recrystallization purification method suitable for industrial application, which is more convenient, faster, and more environmentally friendly, and provides stable yield, making industrial application possible.

The invention discloses a synthesis method of 2-(2-(2-bromoethyoxyl) ethyoxyl) ethanol, which comprises the following step: by taking a compound 2-chloroethoxy-2-ethyoxyl diethanol as a raw material, under the action of zinc bromide, obtaining a target compound 2-(2-(2-bromoethyoxyl) ethyoxyl) ethanol. Zinc bromide adopted in the process serves as a bromine source and has the effect of Lewis acid, chlorine leaving groups are activated, and the reaction is completed efficiently. Finally, the preparation of the compound 2-(2-(2-bromoethyoxyl) ethyoxyl) ethanol through short steps, simple operation, low cost and relatively mild reaction conditions is realized.

The invention provides a method for preparing propylene carbonate through low-field nuclear magnetic imaging in-situ monitoring of propylene oxide and carbon dioxide, and belongs to the technical field of chemical engineering and material science. The method disclosed by the invention comprises the following steps: carrying out copolymerization reaction on divinyl benzene and vinyl imidazole to obtain polydivinyl benzene-vinyl imidazole; the preparation method comprises the following steps: carrying out quaternization reaction on bromoethanol and polydivinylbenzene-vinyl imidazole to obtain a polymerized ionic liquid containing a hydroxyethyl group; the method comprises the following steps: carrying out complexation reaction on polymeric ionic liquid and zinc bromide to obtain a catalyst containing Lewis acidity; the method comprises the following steps: introducing propylene oxide and carbon dioxide into a catalyst for reaction, and carrying out in-situ detection by adopting a low-field nuclear magnetic imaging system to obtain propylene carbonate. According to the low-field nuclear magnetic imaging in-situ monitoring technology, real-time monitoring can be carried out in the reaction process, dynamic changes of reaction raw materials and products are presented, and data can be rapidly obtained.

The embodiment of the invention discloses a preparation method of a solid electrolyte containing porous polybromine zinc ionic liquid, which comprises the following steps: reacting a nitrogen-containing heterocyclic ring and bromobutane in an environment of 55-65 DEG C according to a molar ratio of tertiary amine nitrogen to halogen atoms of 1: (1-1.1), recrystallizing, removing impurities, washing, and drying in vacuum to obtain bromine ionic liquid; reacting the bromine ionic liquid with zinc bromide according to a molar ratio of 2: 1 in an environment of 55-65 DEG C, recrystallizing, removing impurities, washing, and drying in vacuum to obtain bromine zinc ionic liquid; the preparation method comprises the following steps: polymerizing melamine and bromine zinc ionic liquid to obtain porous polybromine zinc ionic liquid; the porous polybromine zinc ionic liquid is used as a filler to be added into an electrolyte to prepare a solid electrolyte. According to the technical scheme provided by the invention, through the structural design of the polyion liquid, different nitrogen-containing heterocyclic rings and bromine zinc anions are introduced for in-situ growth of lithium bromide and lithium zinc alloy, so that the interface stability of the electrolyte and a lithium metal negative electrode is improved, and meanwhile, the migration of lithium ions is promoted.

The invention discloses a separation and recovery method for valuable materials in a crystalline silicon photovoltaic module. The method comprises the following steps: pretreating the crystalline silicon photovoltaic module; zinc bromide and water are used for preparing heavy liquid with the first density and the second density, the first density is smaller than the second density, the mixed material of the glass particles, the solar cell and the welding strip is placed in the heavy liquid with the first density for reselection and separation, and the solar cell is obtained; the remaining glass particle and solder strip mixed material is placed in heavy liquid with the second density to be subjected to reselection separation, and the glass particles and the solder strips are obtained respectively; and respectively carrying out ultrasonic washing on the glass particles, the solar cell and the solder strip obtained by reselection to obtain crude products of the glass particles, the solar cell and the solder strip. Based on the density sorting principle and the hydrometallurgy technology, efficient sorting of glass particles, solar cells and welding strips in the waste crystalline silicon photovoltaic module and effective recycling of valuable materials such as silicon wafers, silver and copper can be achieved.