343results about "Alkaline electrolytes" patented technology

The invention discloses an alkali-soluble dihydroquinoline phenazine organic active substance, an electrolyte containing the same and an application of the electrolyte, the alkali-soluble dihydroquinoline phenazine organic active substance has a molecular structural formula shown in a formula (I), in the molecular structural formula, R1, R2, R3, R4, R5, R6, R7 and R8 are respectively and independently selected from-H,-OH,-COOH,-SO3H,-Ar,-PO3H,-OCxH2xCOOH,-OCyH2ySO3H and-OCzH2zPO3H, and at least one alkali-soluble group is contained. The active material has the advantage of multi-electron transfer, can accumulatively transfer 4 equivalent electrons, and has the potential of constructing a high-energy-density flow battery.

Provided is a novel composition, in particular, a composition comprising an inorganic-organic hybrid compound. The composition comprises an inorganic-organic hybrid compound and a hydrophobic resin, wherein the inorganic-organic hybrid compound comprises a polyvinyl alcohol-based resin to which a metal oxide is chemically bonded.

Systems and methods of the various embodiments may provide a refuelable battery for the power grid to provide a sustainable, cost-effective, and / or operationally efficient solution to energy source variability and / or energy demand variability. In particular, the systems and methods of the various embodiments may provide a refuelable primary battery solution that addresses bulk seasonal energy storage needs, variable demand needs, and other challenges.

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 present invention provides an alkaline button cell that has excellent load characteristics and high reliability.　An alkaline button cell which is obtained by having a positive electrode that has a positive electrode mixture layer containing silver oxide and a conductive assistant, a negative electrode that contains zinc particles, and an alkaline electrolyte solution contained in a battery container that is composed of an outer package can, a cover plate and a resin gasket, wherein: carbon black and graphite particles are contained as the conductive assistant in the positive electrode mixture layer; and the water content in the battery container is set to 0.63-1 g per 1 g of the zinc particles in the negative electrode.

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.

An electrochemical energy storage cell (100) comprises a housing with a metallic housing cup (140) and a housing lid (150). The housing cup (140) includes a circular cup base and a circumferential housing cup shell. The energy storage cell comprises a positive and a negative electrode (110, 120) arranged in the housing. One of the electrodes, preferably the positive electrode, is designed as a hollow cylindrical electrode (120) and encloses a cavity in which the other electrode (110), preferably the negative electrode, is arranged. The cup base has an annular first region (170) in which the hollow cylindrical electrode (120) rests on the cup base, and a circular central second region (180) enclosed by the first region (170).The energy storage cell is further characterized by the fact that the cup bottom has at least one notch (200) in the first annular area (170), which structurally weakens the cup bottom.

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).

Provided is a charging unit for a flow-type metal-air battery, which is capable of peeling off negative electrode active material particles from a negative electrode without consuming a large amount of power, and which does not require physical contact with a blade or the like, thereby having high durability. This charging unit for a flow-type metal-air battery is provided with: a first layer in which a first flow path is formed; a positive electrode facing the first flow path; a second layer in which a second flow path is formed; a negative electrode facing the second flow path; a diaphragm that separates the first flow path and the second flow path from each other; a positive electrode solution that flows through the first flow path; a negative electrode solution that flows through the second flow path; and a control unit that changes the flow rate of the negative electrode solution in the second flow path.

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.

Multiple embodiments provide a battery, a large-capacity energy storage system including the battery, and / or a method of operating the large-capacity energy storage system including the battery. In multiple embodiments, 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 include direct reduced iron ("DRI"). In multiple embodiments, the DRI may be in the form of a pellet. In multiple embodiments, based on the total mass of the pellet, the pellet may include at least about 60% by weight of iron by elemental mass. In multiple embodiments, one or both of the first electrode and the second electrode include about 60% to about 90% iron and about 1% to about 40% of a component, the component including one or more materials selected from SiO2, Al2O3, MgO, CaO and TiO2.

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.

According to one aspect, an electrochemical cell may include a first electrode including a metal-containing active material, a second electrode, and an electrolyte in ionic communication between the first electrode and the second electrode, the electrolyte including a gel and an additive, the gel including a polymer network and a liquid medium, the polymer network carried in the liquid medium, the additive suspended in the gel and accumulable at the metal-containing active material of the first electrode.

A nickel-zinc secondary battery includes a positive electrode, a negative electrode, and an alkaline electrolyte. The positive electrode includes a particle that includes a nickel composite hydroxide as a positive electrode active material, and the particle including the nickel composite hydroxide has a half-value width of a peak in a (101) plane appearing at 2θ=35 to 45° in an X-ray diffraction measurement of less than 0.8°.

Battery cells of this disclosure include a zinc anode and a cathode having acidified metal oxide nanomaterials combined with alkaline battery chemistry materials.

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.