292results about "Acid electrolytes" patented technology

The invention provides a preparation method of a vanadium electrolyte for an all-vanadium redox flow battery, the vanadium electrolyte and application. The method comprises the following steps: (1) dissolving concentrated sulfuric acid in water to obtain a sulfuric acid solution with a preset concentration, then adding vanadium pentoxide into the sulfuric acid solution, and reacting to obtain a first vanadium solution; (2) the temperature of the first vanadium solution is kept to be the preset temperature, low-valence vanadium oxide is added into the first vanadium solution for reaction, water or hydrochloric acid is supplemented in the reaction process, a second vanadium solution is obtained, and the low-valence vanadium oxide is vanadium oxide with the valence of 3-3.5; and (3) filtering the second vanadium solution to obtain the vanadium electrolyte. The method provided by the invention can save energy consumption, reduce cost and improve dissolution efficiency.

The invention discloses an aqueous all-iron flow battery negative electrode electrolyte and an aqueous all-iron flow battery, and belongs to the fields of an electrochemical energy storage technology and a flow battery. The aqueous total iron flow battery negative electrode electrolyte comprises an iron ion-containing active substance, a first complexing agent, a second complexing agent and hydrogen evolution inhibitor, a supporting electrolyte and water, and the first complexing agent and the second complexing agent and hydrogen evolution inhibitor are simultaneously combined to iron ions to form a stable chelate with a saturated six-coordinate structure. The first complexing agent is selected from triethanolamine or analogues thereof, and the second complexing agent and hydrogen evolution inhibitor is selected from organic acids having a chelation effect and salts thereof. According to the invention, two complexing agents are combined with the same iron ion at the same time to form a stable six-coordinate structure, so that the problems of capacity fading, low energy efficiency and poor cycling stability caused by iron separation and hydrogen separation due to dissociation of organic matters and ferrous ions in the operation process of the battery are effectively relieved.

The invention belongs to the technical field of flow batteries, particularly relates to the technical field of flow batteries, and particularly relates to an electrolyte for a chromium-cerium flow battery as well as a preparation method and application of the electrolyte. The electrolyte comprises a positive electrode electrolyte and a negative electrode electrolyte, the positive electrode electrolyte and the negative electrode electrolyte are both acidic aqueous solutions, the positive electrode electrolyte contains cerium (III) ions, and the negative electrode electrolyte contains chromium (III) ions. The cost of the electrolyte is lower than that of an existing redox flow battery, and the battery based on the electrolyte is high in voltage and good in cycling stability.

Compounds with redox molecular cores and branched molecular tails comprising ionic functionalities for uses as electrolytes in redox flow batteries are described, as well as methods of synthesis and use thereof. The compounds have redox active perylene diimide or ferrocene molecular core decorated with the branched molecular tails having multiple ionic functionalities to improve water solubility of the molecular core, and, as such, its performance as the electrolyte.

The invention discloses an electrolyte for water system energy storage and a preparation method and application thereof, and belongs to the technical field of electrochemical energy storage, the electrolyte for water system energy storage comprises a mixed salt and a mixed solvent, the mixed salt comprises a metal salt and an organic salt; the mixed solvent comprises water and an aprotic organic solvent; the organic salt is trifluoromethanesulfonate containing imidazole cations. Through the ion-solvent synergistic effect, an anion-rich and water-poor double-electrode-layer structure is formed on an electrode interface, dendritic crystal growth and side reaction are remarkably inhibited, and meanwhile high ionic conductivity is kept. The aqueous battery prepared from the electrolyte has good cycling stability and excellent practical performance under the conditions of low N / P ratio and low current density.

The invention discloses an aqueous electrolyte, a preparation method thereof and an aqueous battery, belongs to the technical field of aqueous batteries, and solves the problems of high polarization potential and short cycle life of an aqueous zinc ion battery in the prior art. The aqueous electrolyte comprises the following components: zinc salt, an additive and water; wherein the additive comprises sulfonate, acetate and halide. The aqueous battery adopting the aqueous electrolyte is long in cycle life and low in polarization potential.

The present invention relates to an electrolyte containing vanadium ions, and a secondary battery comprising same, and, more specifically, to an electrolyte containing vanadium ions, the electrolyte having concentrations of vanadium ions and an acidic solution that are adjusted to be different in a cathode electrolyte and an anode electrolyte, which are used in a secondary battery using an electrolyte containing vanadium ions, so as to lower the self-discharge rate of a secondary battery, thereby enabling performance to be enhanced.

The invention discloses an electrolyte additive, an electrolyte and a battery, the electrolyte additive comprises a first additive and a second additive, the first additive comprises a compound shown as a formula 1: # imgabs0 #, R1 and R2 are respectively and independently selected from at least one of H, phenyl, halogen, C1-C6 alkyl, C1-C6 halogenated alkyl and # imgabs1 #, and R1 and R2 are not H at the same time; r3, R4 and R5 are respectively and independently selected from at least one of C1-C3 alkylene groups, oxygen atoms, O = S = O, C = O and S = O, at least one of R3, R4 and R5 is selected from O = S = O, C = O and S = O, and at least one of R3, R4 and R5 is selected from oxygen atoms; and the second additive comprises a compound shown as a formula 2: # imgabs2. The electrolyte additive is added into the electrolyte of the battery, so that the fast charging performance of the battery can be improved, and the high-temperature cycle performance can be improved.

The invention discloses an electrolyte additive and application thereof, and particularly relates to application in an aqueous zinc battery. The electrolyte additive is trans-aconitic acid (TAA), the trans-aconitic acid and electrolyte salt are added into water to form an electrolyte, and the electrolyte is applied to the aqueous zinc battery. The trans-aconitic acid is used as an electrolyte additive, so that the electrolyte is safe and environment-friendly; the trans-aconitic acid molecule contains three carboxylic acid groups and one unsaturated double bond, has strong coordination ability with metal ions, can effectively regulate and control the solvation structure of the metal ions, and can participate in formation of a stable solid electrolyte interface, inhibition of side reaction and the like; the electrolyte containing the trans-aconitic acid as the additive is applied to the water-based zinc battery and has remarkable effects on hydrogen evolution reaction, corrosion inhibition, zinc dendrite growth and the like of the battery, and the water-based zinc battery with super-long cycle life is obtained.

The invention discloses an all-vanadium redox flow battery electrolyte containing an imidazole phosphate ionic liquid additive and application of the all-vanadium redox flow battery electrolyte, and belongs to the technical field of all-vanadium redox flow battery energy storage. According to the invention, an imidazole phosphate ionic liquid additive is added into the electrolyte of the all-vanadium redox flow battery, and the concentration of the additive in the electrolyte is 0.01 g / L-5 g / L. The cation in the imidazole phosphate ionic liquid additive is imidazole cation, the anion in the imidazole phosphate ionic liquid additive is phosphate anion, the imidazole cation is one or two or more of 1-ethyl-3-methylimidazole, 1-vinyl-3-methylimidazole, 1-butyl-3-methylimidazole and 1-hydroxyethyl-3-methylimidazole, the anion in the imidazole phosphate ionic liquid additive is phosphate anion, and the cation in the imidazole phosphate ionic liquid additive is one or more of 1-ethyl-3-methylimidazole, 1-vinyl-3-methylimidazole, 1-vinyl-3-methylimidazole, 1-butyl-3-methylimidazole and 1-hydroxyethyl-3-methylimidazole. And the phosphate anions are one or two or more of phosphate, hydrophosphate, dihydric phosphate and pyrophosphate. The method is simple in process operation, energy-saving, environment-friendly and low in cost, and meanwhile, stable operation of the electrolyte in the battery can be realized.

To provide a technology that can suppress the elution of Al from a current collector into an aqueous electrolyte when an Al-containing current collector is used in a non-aqueous battery.SOLUTION: A non-aqueous battery includes a positive electrode, an aqueous electrolyte, and a negative electrode. One or both of the positive electrode and the negative electrode have a current collector containing Al. The current collector is in contact with the aqueous electrolyte. The aqueous electrolyte contains water and potassium polyphosphate dissolved in the water. At least one of protons, hydroxide ions, and polyphosphate ions contained in the aqueous electrolyte acts as carrier ions, and the aqueous electrolyte does not have a freezing point at a temperature of -40°C or higher.SELECTED DRAWING: Figure 1

The disclosure provides redox flow batteries that have long-duration or long-lifetime for energy storage applications. The water-soluble perylene diimide based molecules can be used as energy storage materials in the anode chambers. The water-soluble ferrocene- based molecules can be used as energy storage materials in the cathode chambers. The redox flow batteries have negligible crossover rates across the membranes.

The invention discloses an electrolyte for a lead storage battery, which is prepared by adding anhydrous sodium sulfate, magnesium sulfate, sodium tetraborate decahydrate, ferrous sulfate heptahydrate, perfluorooctyl amine sulfonate and disodium ethylene diamine tetraacetate into the electrolyte according to a certain mass percent, the chelate is of a spatial network structure and can lock a positive active material and effectively delay falling of the positive active material, especially a surface active material, and conductive particles are uniformly distributed in the spatial network structure, so that the conductivity of the system is greatly improved, the charging efficiency is improved, and the water loss of the battery is reduced; the added sodium tetraborate decahydrate has a further buffering effect on the corrosion of the grid, and the formula delays the corrosion of the positive grid from multiple aspects; therefore, the cycle life of the lead storage battery, especially the lead storage battery for an electric bicycle, is prolonged, and the capacity of the battery can be ensured by adding the perfluorooctyl sulfonic acid amine.

This invention belongs to the field of vanadium redox flow batteries, specifically relating to a vanadium redox flow battery precursor, a vanadium redox flow battery, and a method for preparing the same. The vanadium redox flow battery precursor of this invention includes a positive electrode electrolyte precursor and a negative electrode electrolyte precursor; the positive electrode electrolyte precursor includes vanadium ions, an inorganic acid, a positive electrode side reaction inhibitor precursor, and a solvent; wherein the positive electrode side reaction inhibitor precursor is aniline; the inorganic acid includes hydrochloric acid; the negative electrode electrolyte precursor includes vanadium ions, an inorganic acid, a negative electrode side reaction inhibitor precursor, and a solvent; wherein the negative electrode side reaction inhibitor precursor is a metal compound; the metal compound is selected from one or more of tin compounds, bismuth compounds, and antimony compounds; the inorganic acid includes hydrochloric acid.

Compounds with redox molecular cores and branched molecular tails comprising ionic functionalities for uses as electrolytes in redox flow batteries are described, as well as methods of synthesis and use thereof. The compounds have redox active perylene diimide or ferrocene molecular core decorated with the branched molecular tails having multiple ionic functionalities to improve water solubility of the molecular core, and, as such, its performance as the electrolyte.

The invention discloses an additive for a vanadium battery electrolyte, the electrolyte and a preparation method of the electrolyte. The additive comprises an inorganic additive and an organic additive, the inorganic additive comprises magnesium aluminum silicate and modified nano silicon dioxide; the organic additive is prepared from diethylenetriamine and chitosan. The mass ratio of the inorganic additive to the organic additive is 3: (1.5-2.5); the mass ratio of the magnesium aluminum silicate to the modified nano silicon dioxide is 1: (1.2-1.5); the mass ratio of the diethylenetriamine to the chitosan is (0.8-1): 3.5. By utilizing the synergistic effect of the components of the additive, the oxidation of divalent vanadium ions can be effectively inhibited, the self-agglutination of pentavalent vanadium ions is prevented, the precipitation of the pentavalent vanadium ions is prevented, the stability of the vanadium battery electrolyte is greatly improved, the added additive has no influence on the acidity and viscosity of the vanadium battery electrolyte, and the service life of a vanadium battery electrolytic stack is prolonged.

The present invention relates to a method for manufacturing a zinc negative electrode of a zinc-ion secondary battery and a zinc-ion secondary battery, the method comprising: a step of forming an artificial coating layer on the surface of a zinc negative electrode by a chemical reaction performed by immersing zinc metal in an inorganic metal salt solution; and a washing and drying step. The present invention can provide a negative electrode of an aqueous zinc-ion secondary battery, which is a safe and eco-friendly next-generation battery for an electric vehicle and an ESS, and a method for manufacturing same.

The invention discloses a preparation method of an aqueous iron ion secondary battery assembled in an atmospheric environment, which comprises the following steps: step 1, adding an acidic aqueous solution into deionized water for solution acidification, and adding Fe < 2 + > salt as a solute; 2, carrying out acidity fine adjustment on the solution obtained in the step 1 by using an acidic aqueous solution to obtain an acidic Fe < 2 + > electrolyte with the pH value of 1-4; and 3, assembling the electrolyte obtained in the step 2, foam iron and VOPO4. 2H2O in an atmospheric environment to form the water-based iron ion secondary battery. The Fe < 2 + > salt electrolyte prepared by the invention can be directly used for assembling the water-based iron ion secondary battery in an atmospheric environment without depending on a glove box in an oxygen-free environment, so that the production cost and the process complexity are greatly reduced; the Fe < 2 + > salt electrolyte prepared in the invention can be directly stored in air, and has the advantage of long-term stable storage; and the cycle life of the battery exceeds 5000 hours.

Disclosed is a novel active material operatable in an aqueous battery. The aqueous battery of the present disclosure includes a positive electrode, an aqueous electrolyte solution and a negative electrode. The positive electrode includes a positive electrode active material, and the negative electrode includes a negative electrode active material. One of or both the positive electrode active material and the negative electrode active material include(s) a composite oxide. The composite oxide contains Na, at least one transition metal element of Fe, Ti, Ni and Mn, and O. The aqueous electrolyte solution contains water and potassium polyphosphate dissolved in the water.

The present invention relates to the technical field of energy storage battery electrolytes, and specifically discloses a method for preparing an iron-chromium flow battery electrolyte. The method uses high-purity iron powder, hydrochloric acid and chromic anhydride as raw materials, and generates ferric chloride and chromium trichloride through chemical reactions under specified conditions. After the reaction is completed, high-purity iron powder is continued to be added to convert all trivalent iron into divalent iron, and finally the required chromium chloride and hydrochloric acid remainder are supplemented, so as to directly prepare the required qualified iron-chromium flow battery electrolyte. The present invention can simply and efficiently prepare the required iron-chromium flow battery electrolyte, and simplifies the production process and reduces the production cost compared to the traditional chloride salt compounding process. The preparation method of the present invention has a simple process, saves time and labor, and has no emissions, which is more environmentally friendly.

The invention relates to the technical field of a lead-acid storage battery electrolyte, and provides a lead-acid storage battery electrolyte composite additive, an electrolyte and a preparation method thereof. The electrolyte composite additive is prepared from the following components: hexadecyl trimethyl ammonium bromide, stannous mono-sulphate, organic sodium phosphonate and 1, 8-diazabicyclo [5.4. 0] undec-7-ene. The electrolyte composite additive provided by the invention solves the problems of fast battery capacity fading and short battery life of a lead-acid battery in a low-temperature environment, and improves the low-temperature resistance of the lead-acid battery.

The invention relates to a vanadium battery electrolyte and application thereof, the vanadium battery electrolyte comprises tetravalent vanadium ions and pentavalent vanadium ions, the electrolyte further comprises sulfuric acid and an additive, and the additive comprises one or more of dopamine, 4-amino-L-phenylalanine, poly L-phenylalanine and poly L-cysteine. The vanadium battery electrolyte provided by the embodiment of the invention is used as the positive electrode electrolyte of the vanadium battery, and the efficiency of the vanadium battery can be improved.

A peeling device (1) includes: an electrolyte sheet (11) attached to a concrete surface; a first electrode (12) connected to the electrolyte sheet (11); a second electrode (13) connected to an exposed reinforcing steel rod; a potential control unit (14) that applies a voltage to the second electrode (13), with the first electrode (12) being taken as a reference electrode, to control the potential generated in the second electrode (13) to fall in a predetermined range; and a current measurement unit (15) that continuously measures the current value of a current flowing from the second electrode (13) to the first electrode (12).

Particular embodiments described herein provide for a battery that includes a zinc anode, a manganese cathode, and an electrolyte. The electrolyte includes an acetate and a sulfate. In some examples, the acetate to sulfate ratio is about 1:1.

The invention discloses a preparation method of a composite oxide solid electrolyte, a current collector and a diaphragm, the composite oxide solid electrolyte comprises Li1. 3Al0. 3Ti1.7 (PO4) 3 and Li7La3Zr2O12, the preparation method comprises the following steps: adding LATP and LLZO into a planetary ball mill containing zirconium oxide and ethanol according to parts by mass for ball milling; drying and sanding; high-temperature sintering is conducted, and the sintering temperature is 800-1100 DEG C. In the preparation process of the composite solid electrolyte, the sintering temperature is lower than that of other types of solid electrolytes, and the composite solid electrolyte has higher ionic conductivity and lower electronic conductivity. When the microporous foil is used as the composite solid electrolyte, the surface of the microporous foil is coated with the composite solid electrolyte, so that the rate capability of the solid-state lithium ion battery can be remarkably improved. The composite solid-state electrolyte is coated on a current collector and a diaphragm, so that the safety performance of the solid-state lithium ion battery can be obviously improved.

The invention discloses an all-iron flow battery negative electrode electrolyte as well as a preparation method and application thereof, the negative electrode electrolyte is prepared from the following components: 1.8 to 3.6 mol / L of ferrous chloride, 0.25 to 1.5 mol / L of magnesium chloride, 0.05 to 0.15 mol / L of sodium chloride and the balance of water, and the pH (Potential of Hydrogen) is-1.0 to 0. According to the negative electrode electrolyte of the efficient all-iron flow battery, the extremely low pH of-1.0-0 is adopted, the problems of hydrogen evolution and poor reversibility of a deposition / dissolution reaction existing in a negative electrode of the all-iron flow battery are solved by regulating and controlling magnesium chloride on an inorganic interface in a strong acid environment, and the all-iron flow battery with high coulombic efficiency and long cycle life is obtained.

The invention relates to an aqueous battery. Disclosed is a novel active material capable of operating in an aqueous battery. This aqueous battery has a positive electrode, an aqueous electrolyte solution, and a negative electrode. The positive electrode contains a positive electrode active material, and the negative electrode contains a negative electrode active material. One or both of the positive electrode active material and the negative electrode active material include a composite oxide. The composite oxide comprises Na; a transition metal element selected from at least one of Fe, Ti, Ni and Mn; and O. The aqueous electrolyte solution contains water and potassium polyphosphate dissolved in the water.

Provided herein are phosphorus battery electrolyte additive chemicals for use in aqueous batteries that prevent self-discharge in the form of corrosion and hydrogen evolution, which increases the efficiency and extends the shelf-life of the batteries.

Provided herein is an electrolyte for a battery, the electrolyte comprising: a solvent comprising water and sulfuric acid; a vanadium salt; a deprotonation inhibitor for [VO2(H2O)3]+; and a V2O5 precipitation inhibitor. Provided also are batteries comprising the electrolyte, kits comprising components of the electrolyte, a method for stabilising vanadium salts in an electrolyte by adding a deprotonation inhibitor for [VO2(H2O)3]+; and a V2O5 precipitation inhibitor.

Provided are a sheet-shaped air battery with excellent storage characteristics and a patch equipped with the sheet-shaped air battery. [Solution] The sheet-type air battery of the present invention comprises a positive electrode with a catalyst layer, a negative electrode, a separator, and an electrolyte solution housed in a sheet-type outer casing, the positive electrode having a porous carbon sheet current collector and a catalyst layer held by the current collector, the negative electrode having an active material and a metal foil sheet as a lead part, and the electrolyte solution being an aqueous solution containing an electrolyte salt and having a pH of 3 or more and less than 12, and containing 3 to 30 mass % of a water-soluble high-boiling point solvent with a boiling point of 150°C or more in the total solvent.