159results about "Alkaline accumulators" patented technology

The present invention discloses a method for preparing a high-ionic conductivity cement-based structured electrolyte and the electrolyte, comprising: mixing a polymer solution, cement, and fine sand to obtain a polymer-cement slurry; subjecting the polymer-cement slurry to low-temperature, sealed curing, and then allowing it to stand at room temperature to obtain a cement-based structured electrolyte. The present invention utilizes a controlled phase separation technique to enable elastic phase separation of the polymer network prior to cement hydration. During the hydration process, the cement adaptively forms the backbone of the polymer network, resulting in a good interface between the two, capable of forming continuous, high-conductivity ion channels. The preparation process is simple to operate and highly reproducible.

A surface-treated steel sheet including: a steel sheet; and a nickel-cobalt-iron diffusion layer formed on the steel sheet as an outermost layer. When the intensities for Ni, Co and Fe are consecutively measured from a surface of the nickel-cobalt-iron diffusion layer in the depth direction by radio frequency glow discharge optical emission spectrometry, and the concentration of Ni, Co and Fe at each of depth positions are determined based on the intensities for Ni, Co, and Fe, a Co concentration gradient ΔPCo ranging from a depth position DCo_MAX to a depth position DCo_15% is 33% by mass / 0.1 μm or less. A depth position at which the concentration of Co is maximum is defined as DCo_MAX and a depth position located closer to the steel sheet than the depth position DCo_MAX and at which the concentration of Co is 15% of the maximum value is defined as DCo_15%.

Generally described herein are multiphase electroactive materials and associated articles (e.g., electrodes), systems (e.g., electrochemical devices), and methods. In certain embodiments, an electroactive material comprises a first component and a second component that is softer than the first component. The first component and the second component may be intermixed such that the second component is dispersed throughout a bulk of the first component. In some embodiments, the first component comprises a first alkali metal (e.g., metallic lithium) and the second component comprises a second alkali metal (e.g., metallic sodium) and a third alkali metal (e.g., metallic potassium).

The invention provides a preparation method of a cobalt-based intermetallic carbide material and application of the cobalt-based intermetallic carbide material in a preparation method of an electrocatalytic nitrate reduction electrolytic tank or a zinc-nitrate battery. The preparation method of the cobalt-based intermetallic carbide material comprises the following steps that cobalt chloride hexahydrate, indium chloride tetrahydrate, dicyandiamide and ketjen black are ground and mixed and then put into a tubular furnace for thermal annealing reduction, and the cobalt-based intermetallic carbide material is obtained. According to the method, cobalt-based intermetallic carbide material Co3InC0.75 powder is prepared into slurry, the slurry is dropped on carbon paper to be used for an electro-catalysis reaction, the material strengthens nitrate adsorption and water decomposition and inhibits a hydrogen evolution reaction, and therefore the performance of electro-catalysis of nitrate reduction to produce ammonia is improved.

The present invention discloses a diazine-based organic negative electrode material for aqueous alkaline batteries and its application, relating to the field of battery technology. This type of organic negative electrode has an electrochemical redox active center with a nitrogen-nitrogen double bond (N=N), including but not limited to azobenzene; azobenzene modified with at least one of halogen, methyl, and nitro functional groups; benzo[c]cinnoline; and benzo[c]cinnoline modified with at least one of halogen, methyl, and nitro functional groups. The organic negative electrode material provided by the present invention can operate stably under various alkaline conditions and is compatible with nickel hydroxide positive electrodes and air positive electrodes. The material has excellent rate performance and long-term cycle stability, and its wide source makes it suitable for large-scale application.

The invention relates to the technical field of battery positive electrode materials, and discloses a secondary zinc-manganese battery positive electrode material, a preparation method and a secondary zinc-manganese battery, the secondary zinc-manganese battery positive electrode material comprises manganese dioxide, graphite, calcium stearate, polypyrrole and a niobium pentoxide nanometer material, the polypyrrole is coated on the surface of the manganese dioxide in an in-situ polymerization mode, and the niobium pentoxide nano material is integrated in the polypyrrole coated manganese dioxide composite material in an in-situ growth mode. According to the secondary zinc-manganese battery positive electrode material provided by the invention, a stable conductive network and an ion channel are constructed by adopting a manganese dioxide / polypyrrole / niobium pentoxide composite material, so that the conductivity and the structural stability of the positive electrode material at a low temperature are remarkably improved.

The application discloses a low-temperature-resistant electrolyte for alkaline batteries and a preparation method thereof, and relates to the technical field of electrolytes. The application comprises the following raw materials in mass fraction: glycerol triacetate 11-13 parts, potassium hydroxide aqueous solution 100-150 parts, fluorine-containing additive 1-5 parts, and organic dispersion 21.3-28 parts; the organic dispersion is prepared from ethylene glycol, tetrabutylammonium trifluoromethanesulfonate, hybrid nanosheet and glycerol triacetate. The hybrid nanosheet prepared from hexagonal boron nitride, cerium ammonium nitrate, urea and polyethylene glycol 400 effectively improves the ion conductivity and cycle stability maintenance rate of the electrolyte at low temperature. The introduction of the components such as glycerol triacetate and fluorine-containing additive in the application further improves the performance maintenance rate of the electrolyte at low temperature, and simultaneously reduces the viscosity of the electrolyte at low temperature. Therefore, the application has a more extensive application prospect.

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 discloses aquadag for an alkaline battery and application of the aquadag. The aquadag comprises the following raw materials in percentage by weight: 12-16% of graphite powder, 5-8% of conductive carbon black, 1-2% of graphene, 15-18% of epoxy resin, 30-50% of butanone and 10-20% of cyclohexanone. The preparation method of the aquadag comprises the following steps: (1) uniformly stirring butanone and cyclohexanone to obtain a composite solvent; (2) adding solid epoxy resin into the composite solvent, and stirring at 800-1000 rpm to completely dissolve the solid epoxy resin; (3) slowly adding graphite powder and conductive carbon black graphene into the composite solvent, and dispersing at a high speed of 1100-1200 rpm for 45-50 min to obtain a mixture; and (4) carrying out ball milling on the mixture, sieving with a 200-mesh sieve, and discharging to obtain the aquadag. The graphene is doped into the aquadag, so that the technical effect of improving the comprehensive performance of the battery is achieved.

A sealing assembly for a battery cell includes a grommet having an opening with an inner surface. A peg has a peg head and a shaft extending from the peg head. The shaft includes a first portion having a larger diameter and a second portion having a smaller diameter, and the shaft extends through the opening in the grommet. The shaft and the grommet form a first interference fit at a distal end of the opening. A trap gap is formed between the distal end of the opening and the peg head. The trap gap defines a trap for a sealant. A sealant is disposed on the shaft and at least partially in the trap.

Systems and methods of operating aluminum-air electrochemical cells are provided, in which, following operation of the electrochemical cell(s), the alkaline electrolyte is removed from the cell(s) and a mixture of water with oxygen-rich organic solvent(s) is introduced to protect the aluminum anodes from corrosion by the electrolyte residues. For example, the cell(s) may be flooded with the mixture and then drained, or the mixture may be circulated through the cell(s). During stand-by, the mixture may be used to flood or to be circulated through the cell(s) and drained, to further enhance the operability of cell(s) during operation.

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 a low-temperature-resistant negative electrode zinc paste and a low-temperature alkaline zinc-manganese battery containing the zinc paste. The negative electrode zinc paste comprises the following components in parts by weight: 60-65 parts of zinc powder, 1-2 parts of a composite conductive agent, 0.1-0.3 part of a composite corrosion inhibitor and 35-38 parts of a low-temperature electrolyte; the low-temperature electrolyte comprises a multi-element nonionic surfactant system, a multi-element nano anti-freezing agent system and a mixed solution A, the 3.9 ohm discharge capacity of the battery under the condition of-40 DEG C is larger than or equal to 60% compared with the capacity retention rate at normal temperature, the interface impedance amplification is smaller than or equal to 15%, the hydrogen evolution amount is reduced by 80% on year-on-year basis, the process is compatible with an existing production line, and the battery is suitable for polar scientific investigation and electronic equipment in plateau and cold regions.

Provided herein hybrid organic-inorganic redox active materials and related composites, compositions, electrode materials, electrodes electrochemical cells, batteries, methods and systems, which, can be used as to provide high performance cathode active materials in high capacity, high energy density, safe, and long-lasting electrochemical cells and batteries when coupled with Li, Na, K, graphite, lithiated graphite, in situ lithiated graphite, silicon, lithiated silicon, in situ lithiated silicon, silicon-graphite, in situ lithiated silicon-graphite, hard carbon, sodiated hard carbon, graphite-silicone, lithiated graphite-silicon etc. anodes in non-aqueous electrolytes.

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.

The invention belongs to the technical field of battery positive electrode material preparation, and particularly relates to a cross-linked conjugated polymer, a preparation method and application in an alkali metal battery. When the cross-linked conjugated polymer is used as a positive electrode, the cross-linked conjugated polymer shows excellent performance in lithium, sodium and potassium ion batteries: the average discharge voltage is as high as 3.4-3.5 V, which is beneficial for improving the energy density of the battery; under extremely high current density, high capacity exceeding 120mAh. G <-1 > can still be released, and extremely fast dynamic characteristics are shown; and under the harsh test condition, the capacity retention ratio still reaches up to 85%-90%.

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.

To provide a zinc fuel which can be manufactured by regeneration of zinc oxide, is easy to handle and store, and is easy to secure contact with a current collector, and to provide its manufacturing method.SOLUTION: The zinc fuel 2 has a support 3 whose surface is formed by a current collector 5, and a negative electrode active material layer 4 covering the surface of the support 3. The negative electrode active material layer 4 is a generated zinc layer formed by dendritic crystals of zinc or a zinc alloy deposited on the surface of the support 3, in which some of the dendritic crystals are crushed and densified, and voids are provided between the crushed dendritic crystals. For example, a long sheet 6 is used as the support 3, and the sheet 6 is immersed in the zinc deposition bath 21 to deposit dendritic crystals on the surface by electrolysis of zinc oxide. The sheet 6 is drawn out from the zinc deposition tank 21, and after a negative electrode active material layer 4 is formed by densifying the generated zinc layer by a press mechanism 23, it is wound in a roll shape to manufacture the zinc fuel 2.SELECTED DRAWING: Figure 4

The invention relates to a preparation method of a negative electrode material applied to a nickel-zinc battery. The preparation method comprises the following steps: dissolving a complexing agent in a solvent to obtain a first solution; adding zinc and / or zinc oxide particles into the first solution to obtain a first mixture; adding a water-soluble barium salt to the first mixture to obtain a second mixture; dissolving a precipitating agent in a solvent to obtain a second solution; adding the second solution into the second mixture for reaction to obtain a third mixture; a step for performing solid-liquid separation on the third mixture and washing and drying the collected solids; the molar ratio of the complexing agent to the barium element in the soluble barium salt is (1-2.5): 1. According to the preparation method, a precipitation method regulated by a complexing agent is adopted, soluble barium salt and the complexing agent are complexed in advance, then the precipitating agent is slowly added, and a uniform coating layer is generated on the surface of zinc and / or zinc oxide particles in situ.

The invention provides a benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative and a preparation method and application thereof.The benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative is of an asymmetric multi-carbonyl quinone phenazine structure, contains a plurality of oxidation-reduction active sites and can show excellent oxidation-reduction performance, molecules of the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative are of a conjugated structure, hydrogen bonds exist between the molecules, and the structure of the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative can be used for preparing the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative. And the material is difficult to dissolve in an electrolyte, and has stable electrochemical performance in an ion battery. The preparation method of the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative comprises the following steps: carrying out condensation reaction on a 2, 3-diaminonaphthalene-1, 4-diketone derivative and 2, 3, 5, 6-tetrahydroxy-1, 4-benzoquinone to obtain an intermediate; and then oxidizing the intermediate to obtain the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative disclosed by the invention.

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.

The aqueous electrolyte secondary battery contains an element and an aqueous electrolyte solution. The element includes a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate. A chemical oxygen demand in the aqueous electrolyte solution is 5 mg / L or more and 160 mg / L or less.

This invention relates to the field of battery cathode materials technology, and discloses a secondary zinc-manganese battery cathode material, its preparation method, and a secondary zinc-manganese battery. The secondary zinc-manganese battery cathode material includes manganese dioxide, graphite, calcium stearate, polypyrrole, and niobium pentoxide nanomaterials. The polypyrrole is coated onto the surface of the manganese dioxide via in-situ polymerization, and the niobium pentoxide nanomaterials are integrated into the polypyrrole-coated manganese dioxide composite material via in-situ growth. This invention provides a secondary zinc-manganese battery cathode material that, by employing a manganese dioxide / polypyrrole / niobium pentoxide composite material, constructs a stable conductive network and ion channels, significantly improving the conductivity and structural stability of the cathode material at low temperatures.

[Problem] To provide a means capable of improving discharging and charging efficiency of an aqueous secondary battery in which manganese dioxide is used as a positive electrode active material. [Solution] A substituted manganese dioxide, in which an oxygen element of manganese dioxide is substituted by one or more types of substitution elements, is used as a positive electrode active material of an aqueous secondary battery.

To provide a zinc battery capable of suppressing self-discharge and maintaining capacity for a long time period.SOLUTION: A battery 2 comprises an outer can 10, and an electrode group 22 accommodated in the outer can 10 together with alkali electrolyte. The electrode group 22 is configured by superposing a positive electrode 24 and a negative electrode 26 via a separator 28. The negative electrode 26 at least contains zinc powder. An average particle diameter of zinc particles configuring the zinc powder is 49 to 71 μm. When the liquid amount of the alkali electrolyte is defined as A, and a theoretical capacity of the negative electrode is defined as B, a ratio A / B of the liquid amount of the alkali electrolyte to the theoretical capacity of the negative electrode is 0.30 to 0.60 mL / Ah.SELECTED DRAWING: Figure 1

A method for manufacturing an electrochemical device that may be selected from the group consisting of: lithium ion batteries with a capacity greater than 1 mAh, capacitors, supercapacitors, resistors, inductors, transistors, photovoltaic cells, fuel cells, implementing a method for manufacturing an assembly comprising a porous electrode and a porous separator comprising a porous layer deposited on a substrate having a porosity comprised between 20% and 60% by volume, and pores with an average diameter of less than 50 nm.

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).

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 comprises solid zinc oxide particles in the anode and dissolved zinc oxide or zinc hydroxide in one or more of the catholyte, the anolyte, and the free electrolyte. Optimally, the solid zinc oxide particles have a large Brunauer, Emmett, and Teller (BET) surface area and / or a large median particle size (D50). The cells may also comprise a certain amount of surfactant in the separator.

A negative electrode structure for a secondary battery (10) includes: a body (12) that is in a form of a foil or a thin plate and contains zinc as a base material; and a non-electron conductive film (11) provided on at least a first surface of the body (12). The film (11) is stretchable. The film (11) includes: an opening portion (13) formed to expose a portion of a first surface of the body (12); and an electrode reaction inhibiting portion (14) that surrounds the opening portion (13) and inhibits an electrode reaction in the body (12). The film (11) is attached to the body (12) in a liquid-tight manner.

The present application provides a nitrogen-containing branched polymer, an anion exchange resin, an anion exchange membrane, and an electrochemical device. The nitrogen-containing branched polymer comprises a nitrogen-containing heterocyclic ring, a branched structure and an aryl, wherein the number of branching points of each branched structure is not less than 3, and the aryl is linked with the branching points of the branched structure by means of the nitrogen-containing heterocyclic ring. The molar ratio of the aryl to the branched structure in the nitrogen-containing branched polymer is A:B = 80-99:1-20. The nitrogen-containing branched polymer satisfies: PDI≤2.6, and has a weight-average molecular weight of 40,000 g / mol to 50,000 g / mol.