42 results about "Zinc bromide" patented technology

The invention provides a double-phase diaphragm-free zinc-bromine battery electrolyte, a preparation method and application, belongs to the technical field of energy storage batteries, and aims to solve the problems that an organic solvent of an existing double-phase diaphragm-free zinc-bromine battery electrolyte has safety risks, the solubility of active substances is not high, and the service life of the battery is prolonged. And when a specific ionic liquid is used as an organic phase, the bromine fixation function is single. Imidazole bromine salt and zinc bromide are jointly dissolved in water, and an ionic liquid phase and a water phase are formed by adjusting the adding amount of the zinc bromide. The solubility of the bromine species in the ionic liquid phase is far greater than that in the water phase, and the imidazole bromine salt can be complexed with the bromine species to form a polybromine complex, so that the ionic liquid phase can be used as a positive electrode electrolyte of a two-phase zinc-bromine battery. The raw materials of the prepared dual-phase electrolyte all participate in the electrode reaction of the zinc-bromine battery, bromine species are dissolved and fixed in an ionic liquid phase under the condition that other organic solvents or ionic liquid is not introduced, diffusion of the bromine species to a water phase is reduced, and the self-discharge phenomenon of the zinc-bromine battery is reduced. And the preparation method of the electrolyte is simple, greatly simplifies the manufacturing process of the battery, and is easy to popularize and apply.

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 runner structure for improving the mass transfer performance of a zinc-bromine flow battery positive electrode and a design method of the runner structure, and belongs to the field of flow batteries. Aiming at the problem of non-uniform two-phase flow mass transfer of positive electrode electrolyte (a zinc bromide solution and an organic bromine complex) of a zinc-bromine flow battery, a scheme of arranging rib plate structures which are arranged in a staggered manner on the inner wall of a snake-shaped flow channel of the bipolar plate is provided. The rib plate structure increases flow velocity change, enhances turbulence disturbance and promotes two-phase uniform mixing; meanwhile, the pressure drop of the runner is increased, and the infiltration amount of electrolyte to the electrode is improved. Simulation results show that under the conditions that the electrolyte inlet flow velocity is 0.1 m / s and the electrode permeability is 1 * 10 <-11 > m < 2 >, the average volume fractions of bromine complexes in the electrode with the size of 2 cm * 2 cm are increased by 140% (the included angle between the bromine complexes and the flow direction is 45 degrees) and 123% (the included angle between the bromine complexes and the flow direction is 135 degrees) respectively compared with a traditional S-shaped flow channel, and the relative standard deviation of reactant phase holdup is reduced by 4.3% and 7.9% respectively. The mass transfer condition of the positive electrode electrolyte of the zinc-bromine flow battery is remarkably improved, and the positive electrode electrolyte can be applied to a large-scale energy storage zinc-bromine flow battery system.

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 present invention relates to the technical field of organic chemistry, and discloses a preparation method of 9-phenanthrene formic acid, wherein the preparation method comprises the following steps: using phenanthrene as a main raw material, iron bromide or zinc bromide as a catalyst, reacting with hydrobromic acid and hydrogen peroxide at 20 to 50 ° C to generate 9-bromophenanthrene, 9-bromophenanthrene reacts with cyanide under a catalyst to generate 9-nitrile phenanthrene, and then hydrolyzing under alkaline conditions to obtain 9-phenanthrene formic acid. The present invention uses cheap and readily available raw materials such as phenanthrene, hydrobromic acid, hydrogen peroxide and sodium cyanide to prepare 9-phenanthrene formic acid, with low production cost, high conversion rate, good product quality, mild reaction conditions, low equipment requirements, and can be used for large-scale industrial preparation of 9-phenanthrene formic acid.

The invention provides a preparation method of buracametacin hydrochloride and an intermediate compound shown as a formula II thereof. The preparation method of the compound as shown in the formula II comprises the following steps: in the presence of a reducing agent, a compound as shown in the formula I is subjected to a reduction reaction to generate the compound as shown in the formula II. The reducing agent is selected from sodium borohydride and / or lithium borohydride, lewis acid also exists in the reaction system, and the lewis acid is also selected from zinc bromide, zinc chloride, boron trifluoride, aluminum chloride, ferric chloride or a combination thereof. The preparation method disclosed by the invention is low in reducing agent price, mild in reaction, relatively high in product yield and purity, and suitable for industrial large-scale production. # imgabs0 #

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.

The invention provides a high-temperature-resistant high-density solid-free water-based completion fluid as well as a preparation method and application thereof. The water-based completion fluid is prepared from the following components in parts by weight: 29 to 42 parts of water, 22 to 38 parts of phosphate, 12 to 17 parts of potassium formate, 8 to 12 parts of zinc bromide, 3 to 7 parts of calcium chloride, 0.5 to 2 parts of a flow pattern regulator, 2 to 3 parts of a corrosion inhibitor and 1 to 2 parts of a filtrate reducer, the flow pattern conditioning agent comprises a Dristemp and / or a Driscal D, and the flow pattern conditioning agent comprises a Dristemp and a Driscal D; the filtrate reducer is polyanionic cellulose; and the density of the water-based completion fluid is 1.6-2.2 g / cm < 3 >. The high-temperature-resistant high-density solid-free water-based completion fluid disclosed by the invention realizes good high-temperature resistance, and still has good viscosity, fluidity, temperature resistance and corrosion resistance after being subjected to hot rolling for 16 hours at the high temperature of 220 DEG C.

An electrolyte of a static zinc-based battery, includes zinc bromide in a molar concentration ranging from 1.5 M to 3.0 M, a mixture of two or more quaternary ammonium salts as a bromine complexing agent in a range of 30% to 55% of the molar concentration of the zinc bromide, a glycol based anti-freezing agent in molar concentration ranging from 0.1 M to 2.0 M; and one or more additional supporting ionic conducting agents selected from a group comprising of zinc chloride, potassium chloride, magnesium chloride, lithium chloride, calcium chloride, or a combination thereof. Each of the one or more additional supporting ionic conducting agents or their combination is in a molar concentration ranging from 0.5 M to 2 M.

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 invention provides a preparation method of hexafluorobutadiene, which comprises the following steps: 1) carrying out electrophilic addition reaction on chlorotrifluoroethylene and liquid bromine at normal temperature and normal pressure to generate 1, 2-dibromo-1-chloro-1, 2, 2-trifluoroethane; 2) mixing zinc powder, 1, 2-dibromo-1-chloro-1, 2, 2-trifluoroethane and an aprotic polar solvent, and carrying out a reaction so as to obtain a zinc reagent containing 1-chloro-2-bromo-1, 2, 2-trifluoroethyl zinc bromide and 1, 2-dibromo-1, 2, 2-trifluoroethyl zinc chloride; 3) adding a catalyst and a zinc reagent, and carrying out a self-coupling reaction to generate an intermediate product containing 1, 4-dibromo-2, 3-dichloro-1, 1, 2, 3, 4, 4-hexafluorobutane and 1, 2, 3, 4-tetrabromo-1, 1, 2, 3, 4, 4-hexafluorobutane; 4) dehalogenating the intermediate product to generate hexafluorobutadiene; the method has the effects of simple reaction process, relatively low risk, relatively mild reaction conditions and relatively high yield.

The application relates to a high-concentration aqueous zinc-ion battery electrolyte, aiming to improve the electrochemical performance of the battery, in particular the low-temperature ion transport capacity, the working temperature range and the cycle life. The electrolyte comprises zinc bromide, lithium bromide and deionized water, wherein the concentration of the zinc bromide is 5-12 mol / L, the concentration of the lithium bromide is 10-24 mol / L, and the molar ratio of the two is 1:(0.2-5). By adding lithium bromide as an additive, the long-range ordered local cluster network of zinc bromide is broken, a high-entropy electrolyte is formed, and the ion conductivity and the electrochemical performance are significantly improved. Experimental results show that the electrolyte exhibits excellent ion conductivity and coulomb efficiency at different temperatures, and is suitable for a wide working temperature range.

The application belongs to the field of liquid flow batteries, and particularly relates to a zinc-bromine liquid flow battery electrolyte for inhibiting zinc dendrites and a preparation method and application thereof; the zinc-bromine liquid flow battery electrolyte for inhibiting zinc dendrites comprises the following steps: mixing zinc bromide, zinc perchlorate, 4-methyl-4-ethyl bromide morpholine and ammonium isethionate, dissolving them in water to obtain solution A; dissolving Pb(NO3)2 and BiCl3 in concentrated hydrochloric acid respectively, ultrasonic oscillation dissolving, diluting with water, and mixing to obtain solution B; mixing and stirring solution A and solution B to obtain the zinc-bromine liquid flow battery electrolyte for inhibiting zinc dendrites. The application can effectively inhibit the generation of zinc dendrites in the zinc-bromine liquid flow battery, and the zinc dendrite in-situ growth observation pool prepared by the application can directly observe the in-situ growth process of zinc deposition, without disassembling the battery, so that the experimental time is greatly saved, the experimental efficiency is improved, and the experimental cost is reduced.

The application provides a preparation method of hexafluorobutadiene, 1) under normal temperature and pressure, chlorotrifluoroethylene and liquid bromine are subjected to an electrophilic addition reaction to generate 1,2-dibromo-1-chloro-1,2,2-trifluoroethane; 2) zinc powder and 1,2-dibromo-1-chloro-1,2,2-trifluoroethane are mixed with an aprotic polar solvent to generate a zinc reagent containing 1-chloro-2-bromo-1,2,2-trifluoroethane zinc bromide and 1,2-dibromo-1,2,2-trifluoroethane zinc chloride; 3) a catalyst is added, and the zinc reagent is subjected to a self-coupling reaction to generate an intermediate product containing 1,4-dibromo-2,3-dichloro-1,1,2,3,4,4-hexafluorobutane and 1,2,3,4-tetrabromo-1,1,2,3,4,4-hexafluorobutane; 4) the intermediate product is subjected to dehalogenation to generate hexafluorobutadiene; and the method has the effects of simple reaction process, low danger, relatively mild reaction conditions and high yield.

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.

An electrolyte (102) of a zinc-bromine static battery (104), comprising zinc bromide in molar concentration from 1.5 to 3.0 M; a mixture of two or more quaternary ammonium salts in 30 to 55 % of the molar concentration of the ZnBr2; a glycol based anti-freezing agent in molar concentration 0.1 to 2.0 M; and one or more additional supporting ionic conducting agents selected from zinc chloride, potassium chloride, magnesium chloride, lithium chloride and calcium chloride, where each or the combination are present in a molar concentration 0.5 to 2 M. The ammonium salts may be selected from tetrapropylammonium bromide (TPAB) or chloride or tetrabutylammonium bromide (TBAB) or chloride along with tetraethylammonium bromide (TEAB) or chloride. The anti-freezing agent may be selected from monoethylene glycol, propylene glycol, 1,3-butylene glycol, polyethylene glycol 200, polyethylene glycol 400, or a combination thereof. The electrolyte may be free of pH maintaining agents and buffering agents.

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 application relates to a method for synthesizing 3-oxacyclic terpene through an oxonium ion initiated tandem polyene cyclization reaction, discloses that (E)-(6-(benzyloxy))-4-methylhex-3-en-1-yl) benzene and derivatives thereof are used as substrates, zinc bromide is used as a catalyst, T + BF4 ‑ As an oxidant, 1,2-dichloroethane is used as a solvent, and activated molecular sieve is used as a water removing agent, and 3-oxacyclic terpene compounds are obtained under the condition of 70 DEG C. The method has good functional group tolerance, and provides an efficient and novel preparation method for 3-oxacyclic terpene compounds.

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 present invention discloses a zero-dimensional hybrid luminescent material with high-efficiency luminescent performance, its preparation method and application, and belongs to the field of solid-state light-emitting and diode display technology. Its technical scheme is as follows: the molecular formula of compound 1 is [H2MPPZ]ZnBr4; the molecular formula of compound 2 is [H2APM]ZnCl4, and the preparation steps are as follows: 1) when preparing compound 1, 1-phenylpiperazine and zinc bromide are dissolved in a mixed solution of methanol, ethylene glycol and hydrobromic acid; when preparing compound 2, N-aminopropylmorpholine and zinc chloride are dissolved in a mixed solution of methanol, ethylene glycol and hydrochloric acid; 2) the reaction vessel containing the mixed solution is sealed and placed in a constant temperature blast drying oven, the reaction is completed, filtered, washed, and dried to obtain a zero-dimensional hybrid luminescent material with high-efficiency luminescent performance. The zero-dimensional hybrid luminescent material with high-efficiency luminescent performance prepared by the present invention has high luminous intensity and good stability, and has potential applications in the fields of solid-state light-emitting and diode display.

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.