239results about "Alkaline electrolytes" patented technology

The invention provides an alkaline zinc-iron flow battery negative electrode electrolyte and a preparation method thereof, a nucleophilic additive for preparing the alkaline zinc-iron flow battery negative electrode electrolyte is potassium sodium tartrate, and the potassium sodium tartrate has two carboxylic acid groups with strong electronegativity and is used for regulating and controlling a solvation structure of zinc ions. According to the nucleophilic additive provided by the invention, the desolvation energy of zinc ions is increased, so that the deposition kinetics of zinc is slowed down, and uniform deposition of zinc is promoted. And the additive can form a shielding layer at the tip of the zinc deposit, so that the growth of zinc dendrites is inhibited, and the stability and reversibility of the zinc deposit are improved.

Aiming at the problems that the high-temperature stability of an existing nickel-zinc battery is reduced and the cycle life of the battery is shortened due to hydrogen evolution reaction or zinc corrosion, the invention provides the electrolyte for the nickel-zinc battery and the nickel-zinc battery thereof. The electrolyte for the nickel-zinc battery comprises a first additive and a second additive, the first additive comprises borate, and the second additive comprises one or two of villiaumite and chlorine salt. According to the electrolyte for the nickel-zinc battery provided by the invention, the first additive can form a barrier structure on a zinc negative electrode interface, and the first additive and the second additive are synergistic, so that the stability of the zinc negative electrode interface can be enhanced, a stable interface film is formed on the negative electrode interface, and side reactions such as hydrogen evolution reaction or zinc corrosion are inhibited; therefore, the cycle life of the battery is prolonged, and the high-temperature performance and the safety performance of the battery are improved.

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

A method for producing soda ash from flue gases involves capturing and processing the gases to remove contaminants and produce a high-purity soda ash. The process involves passing flue gas through a carbon capture system, where nitrates and sulfates are removed from the gas. The gas is then scrubbed with a rich caustic, causing a chemical reaction that removes carbon dioxide. The resulting product is then separated into a purified Na2CO3 product, essentially pure soda ash.

The disclosure relates to an aqueous electrochemical device comprising a negative electrode, a positive electrode, a separator and an aqueous electrolyte having an alkaline pH, wherein onto the positive electrode is disposed at least one layer of nanoparticles capable of being used to form a local hydronium ion rich environment at the positive electrode during operation of the device, and / or the capacity ratio between the negative electrode and the positive electrode is less than 1 so as to substantially avoid production of oxygen at the positive electrode. The electrochemical device may find particular use in large-scale energy storage.

The present disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe2+ and Fe3+“green rusts related compounds”.

Provided is a hydroxide ion-conducting separator excellent in alkali resistance and capable of further effectively suppressing short circuiting caused by zinc dendrites. The LDH compound separator includes a porous substrate made of a high molecular material and a layered double hydroxide (LDH) compound that seals the pores of the porous substrate. The average porosity of the central portion in the thickness direction of the LDH compound separator is lower than the average porosity of the portion near the surface of the LDH compound separator.

To provide an electrochemically active cathode material for a battery.SOLUTION: An electrochemically active cathode material includes a non-stoichiometric beta-delithiated layered nickel oxide. The non-stoichiometric beta-delithiated layered nickel oxide has a chemical formula. The chemical formula is LixAyNi1+a-zMzO2*nH2O. In the formula, x is approximately 0.02 to 0.20, y is approximately 0.03 to 0.20, a is approximately 0.02 to 0.2, z is approximately 0 to 0.2, and n is approximately 0 to 1. In the chemical formula, A is an alkali metal. The alkali metal includes potassium, rubidium, cesium, and any combination thereof. In the chemical formula, M comprises an alkaline earth metal, a transition metal, a non-transition metal, and any combination thereof.SELECTED DRAWING: Figure 1

The rechargeable battery cell can include an electrode having a plurality of three-dimensional channels defined therethrough, at least 90% of the three-dimensional channels having pores between 50 nanometers and 400 microns in size. An ion exchange material can be disposed to define an interface with at least a portion of the electrode. In some embodiments, the electrode includes a zinc (Zn)-containing anode and a cathode including at least one of nickel hydroxide (Ni(OH)2), nickel oxyhydroxide (NiOOH), manganese dioxide (MnO2), copper oxide, and bismuth oxide.

To provide an alkaline electrochemical battery.SOLUTION: Alkaline electrochemical cells are provided, wherein dissolved zinc oxide or zinc hydroxide is included at least in the free electrolyte solution, and / or solid zinc oxide or zinc hydroxide is included in the anode, so as to slow formation of a zinc oxide passivation layer on a zinc electrode. Methods for preparing such cells are also provided.SELECTED DRAWING: Figure 1

We provide long-term and ultra-long-term (overall, ≥8 hours) energy storage systems. [Solution] Various embodiments may include a battery comprising a first electrode, an electrolyte, and a second electrode ionically conductively connected to the first electrode via the electrolyte. The first electrode comprises direct reduced iron ("DRI") pellets and a conductive material. The conductive material may be scattered between individual DRI pellets. The conductive material has a higher electrical conductivity than the DRI pellets.

To provide a hydrogen storage alloy negative electrode that improves cycle life characteristics and low-temperature charge characteristics.SOLUTION: A hydrogen storage alloy negative electrode includes a hydrogen storage alloy and yttrium fluoride as an additive. The mass of yttrium fluoride is 0.1 mass part or more and 0.2 mass part or less per 100 mass parts of hydrogen storage alloy powder.SELECTED DRAWING: Figure 1

The application discloses a preparation method and application of an alkaline zinc-based flow battery electrolyte, and comprises the following steps: firstly, dissolving a hydroxide solid in deionized water to obtain an alkaline aqueous solution; secondly, dissolving a zinc oxide solid in the alkaline aqueous solution obtained in the step (I) to obtain an alkaline aqueous solution containing a zincate; and finally, dissolving a sugar alcohol and a chloromethane in the alkaline aqueous solution containing the zincate obtained in the step (II) to obtain an alkaline electrolyte. By introducing different concentrations of the sugar alcohol and the chloromethane into the alkaline electrolyte containing the zincate, the double electric layer and the solvation structure of the zinc negative electrode are regulated, the self-corrosion and the hydrogen evolution side reaction problems of the zinc negative electrode under the strong alkaline (pH>14) condition are effectively inhibited, the alkaline electrolyte has good zinc compatibility, high stability and relatively fast reaction kinetics, and has great potential in the development and application of the alkaline zinc-based flow battery.

The present invention relates to a method for electrolysis of water (1 ) by means of a device (7) comprising a reversible cell for the production of hydrogen and oxygen. A solution of potassium hydroxide (KOH) is fed into the cell at a concentration of between 35% and 55% w / v, at a temperature of between 150°C and 374°C, and in a condition of minimum pressure of between 2.2 bar and 129.1 bar. The method provides for I) preparing in the mixer the aqueous alkaline solution of KOH having a concentration of potassium hydroxide (KOH) of between 35% and 55% w / v; II) heating said aqueous alkaline solution to a temperature of between 150°C and 374°C; III) increasing the pressure to maintain the aqueous alkaline solution in the liquid phase at a minimum pressure condition of between 2.2 bar and 129.1 bar; IV) passing the water through the hydrophobic layer (3) of each electrode and reaching the respective catalyst layer (5) to catalyse a reduction phase of said hydrogen or an oxidation phase of said oxygen and the porous electrode layer (4) to carry out said reduction and said oxidation respectively; V) collecting gaseous hydrogen and oxygen released from phase IV).

Alkaline electrochemical cells are provided, wherein methods to decrease or eliminate shorting in batteries by preventing zinc oxide reaction precipitate from creating a conductive bridge between the two electrodes. The alkaline electrochemical cell comprising dissolved zinc oxide or zinc hydroxide in at least the electrolyte solution, and / or solid zinc oxide particles or zinc hydroxide in the anode, a silicon donor in the anode, and / or a bilayer separator optimally comprising a high-density layer and a low-density layer.

The invention discloses an all-alkaline manganese-based open-circuit flow battery and a construction method thereof. In the flow battery, a charging negative electrode catalyst is used as a charging negative electrode, and the charging negative electrode catalyst and a nitrate-containing charging negative electrode electrolyte form a charging negative electrode module; the discharge negative electrode catalyst is used as a discharge negative electrode, and forms a discharge negative electrode module with the ethylene glycol-containing discharge negative electrode electrolyte; using an inert catalyst as an inert positive electrode, and forming a positive electrode module with the positive electrode electrolyte containing the alkaline redox ion pair; the positive electrode module is arranged between the charging negative electrode module and the discharging negative electrode module, and the diaphragms are arranged between the adjacent modules. The additive is low in cost, high in safety, stable and long-acting, and the manganese element is used as an active substance, so that the cost is greatly reduced; the alkaline electrolyte is safer than the acidic electrolyte, so that the problem of equipment corrosion is reduced; the alkaline positive electrode electrolyte is coupled with the organic matter oxidation reaction, so that the loss caused by acid-base neutralization is avoided, and the stability of the open-circuit flow battery is effectively improved.

To provide long and ultra-long duration energy storage systems.SOLUTION: There are provided a battery, a bulk energy storage system including the battery, and / or a method of operating the bulk energy storage system including the battery. The battery may include a first electrode, an electrolyte, and a second electrode, wherein one or both of the first electrode and the second electrode comprise direct reduced iron ("DRI"). The DRI may be in the form of pellets. The pellets may comprise at least about 60 wt.% iron by elemental mass, based on the total mass of the pellets. One or both of the first electrode and the second electrode comprises from about 60% to about 90% iron and from about 1% to about 40% of a component comprising one or more of materials selected from a group of SiO2, AI2O3, MgO, CaO, and TiO2.SELECTED DRAWING: Figure 1

Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The positive electrode material includes a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, etc. The composite positive electrode material prepared by the embodiments of the present disclosure has the advantage of a high discharge platform, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery.

An alkaline storage battery includes a positive electrode. The positive electrode includes a positive electrode mixture. The positive electrode mixture contains a nickel compound and a metal compound. The nickel compound is a positive electrode active material The metal compound is a compound of at least one metal element selected from the group consisting of titanium, niobium, tungsten, vanadium, molybdenum, zirconium, and tantalum. A ratio Wm / Wn of a mass Wm of the metal compound contained in the positive electrode mixture to a mass Wn of the nickel compound contained in the positive electrode mixture in terms of nickel hydroxide ranges from 0.2 / 100 to 5.0 / 100. The metal compound contains iron at a mass ratio ranging from 10 ppm to 10000 ppm. A ratio We / Wp of a mass We of the alkaline electrolyte to a mass Wp of the positive electrode mixture ranges from 0.35 to 1.0.

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.

A technique for the electrochemical synthesis of rechargeable battery cathode precursor materials using porous carbon elements is disclosed. The porous carbon elements act as air cathodes for the reduction of oxygen. The reduced oxygen species can oxidize transition metal anodes, thereby promoting room-temperature redox reactions with transition metals, including those that are generally corrosion-resistant, such as nickel. The transition metal reaction product(s) can be further processed into rechargeable battery cathode materials without the synthesis of hazardous waste products.

An electrolyte composition for a Zn-MnO2 electrochemical device said electrolyte composition comprising water, a zinc salt, and a combination of additives, wherein the combination of additives comprises an organic additive and an additive of formula (I), its use and an electrochemical device comprising said electrolyte.

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.

Systems, apparatuses, and / or the like are provided. In some embodiments, an electrochemical cell may include a container, a ring-shaped cathode disposed within the container, wherein the ring-shaped cathode defines an open interior, an anode disposed within the open interior of the ring-shaped cathode, a separator disposed between the cathode and the anode, an electrolyte solution, and a current collector electrically connected with a portion of the container, wherein the current collector is positioned at least partially within the anode. For example, current collectors may include a base including a first material that is fixedly attached to the portion of the container and a zinc component composed of a second material and fixedly attached to the base.

A battery includes an air cathode, an anode, an aqueous electrolyte, and a housing, wherein, the housing includes one or more air access ports defining a total vent area, the battery exhibit a current density, a ratio of current density to total vent area is greater than about 100 mA / mm2, and the aqueous electrolyte comprises an amphoteric fluorosurfactant.

The system comprises a fuel cell including electrodes, a fuel inlet for introducing a non-carbon binding fuel into the fuel cell, an air inlet, an electrolyte inlet, and an outlet for outlet of deplenished electrolyte.

The invention discloses a defect-engineered nanosheet material for an alkaline aqueous battery as well as a preparation method and application of the defect-engineered nanosheet material, and belongs to the technical field of nano materials and electrochemical energy storage. The method comprises the following steps: firstly, dissolving 1, 3, 5-benzene tricarboxylic acid and bismuth nitrate pentahydrate in methanol, and carrying out hydrothermal reaction to obtain a bismuth-based metal-organic framework precursor; and then dispersing the precursor and ammonium halide in deionized water, and carrying out ion etching reaction through oil bath heating to obtain the bismuth oxyhalide nanosheet material. The prepared material has a self-supported hierarchical porous nanosheet structure, the surface of the material has wrinkles and pore channels, and the material contains oxygen vacancies and low-valence bismuth defects. The material can be used as a negative electrode to be applied to an alkaline aqueous battery, and after the material, a positive electrode material and alkaline electrolyte are assembled into a battery, the battery has high specific capacity, excellent rate capability and good cycle stability. The preparation method is simple in process and mild in condition, and the material performance can be optimized by adjusting etching parameters.

Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The key points of the technical solution of the present disclosure is one of positive electrode active material of a low-cost alkaline secondary battery and s a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, a composite positive electrode material including manganese dioxide and layered hydroxide, or a composite positive electrode material including manganese dioxide, conductive material, and one of layered hydroxide, partially oxidized layered hydroxide, or layered hydroxide. A method for preparing a zinc negative electrode material for the low-cost alkaline secondary battery and a zinc nickel secondary battery using the negative electrode material are provided. The composite positive electrode material prepared by the present disclosure has the advantage of a high discharge platform, high capacity, and good cycling stability, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery and improves the cycling life.