395results about "Acid electrolytes" patented technology

Described are aqueous rechargeable hydrogen batteries operating in the full pH range (e.g., pH: −1 to 15) with potential for electrical grid storage. The pH-universal hydrogen batteries operate with different redox chemistry on the cathodes and reversible hydrogen evolution / oxidation reactions (HER / HOR) on the anode. The reactions can be catalyzed by a highly active ruthenium-based electrocatalyst. The ruthenium-based catalysts exhibit comparable specific activity and superior long-term stability of HER / HOR to that of state-of-the-art Pt / C electrocatalyst in the full pH range. New chemistries for aqueous rechargeable hydrogen batteries are also provided.

The invention belongs to the field of secondary batteries, and particularly relates to an aqueous zinc ion battery electrolyte additive and an electrolyte. The additive is a beta-diketone organic reagent. When the additive is added into the zinc salt-containing electrolyte, dendritic crystal growth and hydrogen evolution corrosion of zinc can be remarkably inhibited, so that the cycle performance and coulombic efficiency of the zinc ion battery are improved. According to the invention, the zinc ion battery has good cycle performance, is easy for industrial production, and has an application prospect in the technical field of energy storage.

The invention discloses a flow battery electrolyte, preparation thereof and a flow battery. The electrolyte comprises a positive electrode electrolyte and a negative electrode electrolyte, the positive electrode electrolyte contains vanadium ions, the negative electrode electrolyte contains titanium ions and chromium ions, and both the positive electrode electrolyte and the negative electrode electrolyte contain acid and compounds containing sulfonic acid groups. The preparation method of the electrolyte comprises the following steps: mixing acid and a sulfonic acid group-containing compound to obtain a solvent, dissolving a vanadium compound by adopting the solvent, and filtering to obtain first filtrate; adjusting the average valence state of vanadium ions to be 4, filtering and taking filtrate to obtain a positive electrode electrolyte; dissolving a titanium compound and a chromium compound by adopting the solvent, and filtering to obtain a second filtrate; and adding water into the second filtrate, and adjusting the concentrations of titanium ions and chromium ions to obtain the negative electrode electrolyte. The electrolyte, a positive electrode, an ion conduction membrane and a negative electrode are further assembled into the flow battery. The electrolyte and the flow battery have the characteristics of high energy density and low cost.

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 belongs to the technical field of electrochemical batteries, and particularly relates to an aqueous electrolyte capable of being used for a high-rate tin metal negative electrode and a tin-manganese battery. The aqueous electrolyte comprises an acidic solvent, a tin salt and various high-valence metal salts / charged water-soluble polymers, and can also comprise a manganese salt. According to the method, high-valence metal salt / charged water-soluble polymer is added into the aqueous electrolyte, the repulsive force of double electric layers is adjusted by using introduced charged particles, and the distribution of an electric field and a concentration field at an interface is homogenized, so that efficient ion transmission and uniform and compact tin deposition behaviors are realized. Meanwhile, the charged particles can effectively inhibit related side reactions on the manganese positive electrode side, so that the tin metal negative electrode and the tin-manganese battery can have long cycle life and excellent rate capability at the same time. In addition, the water-based electrolyte is low in raw material price and small in dosage, the reaction process is simple and mild, and the water-based electrolyte has good application and development prospects.

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.

A lead-acid battery includes: a positive electrode; a negative electrode; and an electrolyte solution. The positive electrode includes a positive current collector and a positive electrode material. The negative electrode includes a negative current collector and a negative electrode material. The positive electrode material contains lead dioxide. The electrolyte solution contains water and sulfuric acid. A content of lead dioxide in the positive electrode material is 70% by mass or more and 82% by mass or less in a virtual full charge state where the lead-acid battery is assumed to be in a full charge state (100%).

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.

Described herein are thermoelectrochemical cells which have high Seebeck coefficients, as well as various implementations for said thermoelectrochemical cells. For instance, in some embodiments, the presently described thermoelectrochemical cell may be used to convert low grade heat into electrical energy. In some embodiments, the output electrical energy may have an oscillatory nature. The magnitude of the output energy and the characteristics of the oscillations may be tuned by adjusting electrode pore sizes, thermoelectrochemical cell temperature gradient and the material of at least one of the electrode, electrolyte and separator.

The present invention provides a method and use of preparing vanadium electrolyte by extracting vanadium without ammonium and liquid circulation, and the method of preparing vanadium electrolyte by extracting vanadium without ammonium and liquid circulation comprises the following steps: step 1, sodium roasting; step 2, leaching and filtration; step 3, acidification and impurity removal; step 4, reduction; step 5, extraction-stripping and vanadium extraction; step 6, cooling and crystallization; step 7, valence state adjustment of vanadium electrolyte. The vanadium-containing raw materials of the present invention include but are not limited to stone coal, vanadium slag, and vanadium-titanium magnetite. The method of preparing vanadium electrolyte by extracting vanadium without ammonium and liquid circulation of the present invention has the advantages of short production process, low energy consumption, and no wastewater discharge, and can achieve the effect of green and efficient vanadium extraction, providing support for China's goal of achieving carbon neutrality.

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 discloses an organic salt capable of inhibiting side reactions such as dendrites and corrosion as an aqueous zinc ion battery electrolyte, wherein the aqueous zinc ion battery electrolyte comprises a zinc salt, deionized water and an organic salt additive; the zinc salt is zinc sulfate; and the organic salt additive is sodium tartrate or sodium citrate. The organic salt additive provided by the present invention can be adsorbed on the surface of zinc in the electrolyte, improve the interface environment between the zinc negative electrode and the electrolyte, and destroy the original solvation shell of the zinc ion, thereby inhibiting the occurrence of side reactions such as dendrites and corrosion, and ultimately extending the service life of the aqueous zinc ion battery and improving the cycle stability. In addition, the additive provided by the present invention has a wide range of sources and low cost, and the preparation method is green and environmentally friendly.

An aqueous electrolyte solution for a proton battery of the present disclosure contains water and pyrophosphoric acid (H4P2O7) dissolved in water at a concentration of 6 mol or more per kilogram of water, and does not have a freezing point at −60° C. or higher. The proton battery of the present disclosure includes the aqueous electrolyte solution of the present disclosure. The proton battery of the present disclosure includes the aqueous electrolyte solution of the present disclosure.

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 relates to a new energy and energy storage technology, and discloses a water-based zinc battery, an electrode / electrolyte interface and a preparation method, the water-based zinc battery comprises the electrode / electrolyte interface, and the preparation method of the electrode / electrolyte interface is as follows: a hydrophilic positive electrode and a hydrogel electrolyte are mutually crosslinked under the action of an electrolyte to obtain the electrode / electrolyte interface. A quasi-solid interface is formed after the hydrophilic positive electrode and the hydrogel electrolyte are cross-linked, so that falling and dissolving of a binder can be effectively prevented, and the stability of the positive electrode is enhanced. And meanwhile, dendritic crystal growth of the zinc negative electrode is inhibited by virtue of the mechanical strength of the gel, and the cycle performance of the battery is improved.

The invention discloses a high-power lead-acid battery electrolyte and a preparation method thereof, and belongs to the technical field of electrochemistry. The lead-acid battery electrolyte comprises the following raw materials: 40 to 60 parts of sulfuric acid, 40 to 60 parts of deionized water, 5 to 10 parts of phosphoric acid, 0.5 to 2 parts of fumed silica, 0.5 to 1 part of lithium carbonate, 0.2 to 1 part of anhydrous sodium sulfate, 0.2 to 0.5 part of lithium iodide, 0.1 to 0.5 part of stannous mono-sulphate, 0.1 to 0.3 part of isopropanol, 0.1 to 0.2 part of acrylamide, 0.02 to 0.1 part of an auxiliary agent and 0.005 to 0.01 part of a defoaming agent. The additive containing the hindered phenol structure, the benzimidazole structure and the hydroxyl group has good compatibility with other raw materials, and can be uniformly dispersed and stably exist in the electrolyte, so that stable and effective effects of oxidation resistance, corrosion resistance and sediment removal are achieved. Therefore, by adding the additive into the electrolyte, the charge-discharge performance of the storage battery can be improved, and the service life of the storage battery can be prolonged.

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.

A water-based rechargeable zinc-manganese battery added with montmorillonite quasi-solid electrolyte comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, the electrolyte is the montmorillonite quasi-solid electrolyte, and the montmorillonite quasi-solid electrolyte is a gel electrolyte formed by dispersing montmorillonite powder in a zinc salt aqueous solution and uniformly stirring the montmorillonite powder and the zinc salt aqueous solution. The preparation method of the water-based rechargeable zinc-manganese battery comprises the following steps: (1) preparing a montmorillonite quasi-solid electrolyte: dispersing montmorillonite powder in a zinc salt aqueous solution, and uniformly stirring to form a gel electrolyte; (2) preparing a positive electrode; (3) preparing a negative electrode; and (4) sequentially stacking the prepared positive electrode, negative electrode and diaphragm, injecting montmorillonite quasi-solid electrolyte, and packaging into the battery. The montmorillonite-based solid electrolyte can effectively inhibit growth of zinc dendrites, reduce hydrogen evolution reaction, improve rate capability and effectively inhibit corrosion of a zinc negative electrode, has the advantages of low cost, simple preparation process, good safety performance and the like, and is suitable for large-scale energy storage.

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 invention discloses a method for preparing all-vanadium redox flow battery electrolyte with different valence states by utilizing multivalent vanadium oxide or a mixture thereof. According to the method, various vanadium oxides (such as vanadium tetraoxide, vanadium trioxide, vanadium pentoxide and vanadium oxides with unknown valence states) or mixtures thereof and vanadium oxides with uncertain proportions and random oxygen contents are used, and low-concentration dilute sulphuric acid is combined, so that the process flow is simplified, and the preparation of the high-purity electrolyte is realized. The method comprises the following specific steps: determining the concentration of vanadium ions and sulfuric acid of the required electrolyte, adding the raw materials according to the proportion for dissolving, and adjusting the valence state of the electrolyte through an electrolytic bath to finally obtain an electrolyte product meeting the commercialization requirement and simultaneously obtain products with additional values, such as hydrogen or oxygen. According to the method, the preparation cost and the energy consumption are reduced, electrolyte with various concentrations and valence states can be provided according to different requirements, and the method is suitable for different scenes.

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.