246results about "Acid electrolytes" patented technology

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.

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 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.

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.

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 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 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.

The high-voltage metal-free battery includes a cathode including a cathode electroactive material including at least one of an organic compound, an oxide, a hydroxide, an oxyhydroxide, a sulfide, and combinations thereof; an anode including an anode electroactive material including at least one of an organic compound, an oxide, a hydroxide, an oxyhydroxide, a sulfide, and combinations thereof; a catholyte in contact with the cathode but not in contact with the anode; and an anolyte in contact with the anode but not in contact with the cathode. The catholyte has a pH less than 4, and the anolyte has a pH greater than 10. The battery includes a separator having ion-selective properties.

The present invention discloses a lead-acid battery pack, which includes a first power supply module and a second power supply module. The first power supply module and the second power supply module are connected in series. The voltage of the battery pack is U. The first power supply module includes battery cells, and the number of battery cells in the first power supply module is M. The second power supply module includes battery cells, and the number of battery cells in the second power supply module is N. The sulfuric acid density in the battery cells of the battery pack is ρ. The number of battery cells N in the second power supply module is less than the number of battery cells M in the first power supply module. The lead-acid battery pack of the present invention can improve the battery life.

A lead acid battery includes a positive electrode comprised of a grid filled with a lead-based active mass. A negative electrode is comprised of a base material. A spacer maintains a distance between the positive and negative electrodes. The battery further includes an active metal and an electrolyte solution. In a process of discharge, the active metal is dissolved in the electrolyte solution, and in a process of charge, the active metal is deposited onto the base material.

The application discloses an electrolyte additive, an electrolyte and a battery, the electrolyte additive comprising a first additive and a second additive, the first additive comprising a compound shown in formula 1: wherein R1 and R2 are each independently selected from at least one of H, a phenyl group, a halogen, a C1-C6 hydrocarbon group, a C1-C6 halogenated hydrocarbon group, wherein R1 and R2 are not H at the same time; R3, R4 and R5 are each independently selected from at least one of a C1-C3 hydrocarbyl group, an oxygen atom, 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 an oxygen atom; and the second additive comprising a compound shown in formula 2: thereby, adding the electrolyte additive to the electrolyte of the battery can improve the fast-charging performance of the battery and can improve the high-temperature cycle performance.

Stable and high performance positive and negative electrolytes compositions to be used in red ox flow battery systems are described. The red ox flow battery system, comprises: at least one rechargeable cell comprising a positive electrolyte, a negative electrolyte, and an ionically conductive membrane positioned between the positive electrolyte and the negative electrolyte, the positive electrolyte in contact with a positive electrode, and the negative electrolyte in contact with a negative electrode. The positive electrolyte consists essentially of water, a first amino acid, an inorganic acid, an iron precursor, a supporting electrolyte, and optionally a boric acid. The negative electrolyte consists essentially of water, the iron precursor, the supporting electrolyte, and a negative electrolyte additive. The iron precursor is FeCL2, FeCL3, FeSO4, FE2(SO4)3, FeO, Fe, Fe2O3, or combinations thereof. The supporting electrolyte is LiCl, NaCl, Na2SO4, KCI, NH4CI, or combinations thereof. The negative electrolyte additive is boric acid or a combination of the boric acid and a second amino acid.

Described herein are carbo-ionic cultures and extracts and applications thereof. The carbo-ionic cultures are grown in media containing an organic component and an inorganic component and the proportions and compositions of these components can be tailored to produce carbo-ionic extracts with specific properties such as, for example, the ability to provide power to a light emitting diode (LED) with a specific voltage. The carbo-ionic cultures and extracts have further uses including enhancing the growth of plants, including plants grown from tissue culture, and as supplemental nutrients for cultures of industrially, commercially, and / or scientifically-important microorganisms. Also described herein are microbial electric circuits comprising the carbo-ionic cultures and extracts described herein as well as applications of those circuits.

According to one approach, a secondary battery is provided. The secondary battery includes a negative electrode, a positive electrode, and an aqueous electrolyte. The negative electrode includes a negative electrode active material-containing layer containing a titanium-containing oxide. At least a part of the surface of the negative electrode active material-containing layer has a film containing an aluminum-containing compound. The aqueous electrolyte contains zinc ions, and a heterocyclic compound containing aromatic ring(s) and heteroatom(s). The weight ratio of zinc ions to the heterocyclic compound in the aqueous electrolyte is within the range from 0.4 to 250.

The invention provides an aqueous cadmium ion-vanadium dioxide battery as well as a preparation method and application thereof, and relates to the field of ocean energy storage. The battery comprises a negative electrode, a positive electrode, a diaphragm and an aqueous electrolyte, the negative electrode is metal cadmium or cadmium-based alloy; the active material of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the aqueous electrolyte is an aqueous solution containing cadmium salt; the total concentration of the cadmium salt in the aqueous electrolyte is 1-4 mol / L. The aqueous vanadium dioxide-cadmium metal secondary battery disclosed by the invention has the advantages of safe aqueous electrolyte system, high rate capability, ultra-long cycle life and the like, and has remarkable advantages when being applied to ocean energy storage.

To provide: battery separators for enhanced flooded lead-acid batteries, such as enhanced flooded start / stop batteries, that do not undergo stratification while in use and / or that exhibit reduced or significantly reduced levels of stratification while in use; and lead-acid batteries, vehicles, and related methods.SOLUTION: A battery separator for enhancing acid mixing in a flooded lead-acid battery comprises: a porous backweb and a plurality of broken ribs extending from at least one side of the backweb; and at least a portion of the plurality of broken ribs being defined by an angular orientation to enhance acid mixing especially during battery movement with the separator positioned parallel to start and stop motion of the battery.SELECTED DRAWING: Figure 26D

The invention discloses a method for preparing an electrolyte by utilizing stone coal vanadium ore. The method comprises the following steps: S1, pretreatment and leaching: carrying out crushing and acid leaching treatment on raw ore; s2, purification and impurity separation: filtering the leachate by adopting a chemical precipitation method to remove precipitates; s3, extraction and back extraction process: adopting a two-stage counter-current extraction process; s4, process optimization and innovation: using digital twin modeling to synchronize actual production data in real time; and S5, finally tempering the electrolyte. In the leaching stage, the ore is heated to 100 DEG C within 10 minutes by virtue of a microwave-assisted acid leaching technology, the reaction time is greatly shortened to 30 minutes from the conventional reaction time, the leaching rate is as high as 95% or above, and meanwhile, the energy consumption is reduced by 45%; and after the leaching aid is added, the vanadium leaching rate is increased from 60% to 90% or above. In the purification step, the molar ratio of calcium to aluminum is accurately controlled to be 1: 0.3, and under the condition that the pH value is 1.5-2.0, the impurity removal rate exceeds 95%, the vanadium loss is lower than 1%, and hydrolysis loss is effectively avoided.

The present invention relates to the assembly of a negatively charged dendrite-inhibiting ionomer membrane for aqueous rechargeable zinc metal batteries (AZMB) made by crosslinking sulfonated polyvinyl alcohol (PVS) and polyvinyl alcohol (PVA).