85results about "Alkaline accumulators" patented technology

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.

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.

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.

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.

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 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.

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.

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.

This electrolyte solution for alkali metal secondary batteries contains a nonaqueous solvent, an alkali metal salt that is dissolved in the nonaqueous solvent, and an alkaline earth metal salt that is dissolved in the nonaqueous solvent.

A secondary battery includes: a positive electrode that intercalates and deintercalates lithium ions; a negative electrode that contains a negative electrode active material that intercalates and deintercalates the lithium ions; and an electrolyte that contains an aqueous solvent. The negative electrode active material contains a titanium-containing compound, and the electrolyte has a pH of 11 or more. When a surface of the negative electrode is analyzed by X-ray photoelectron spectroscopy, a proportion of a sum of detection amounts of each of lithium, titanium, tin, zirconium, bismuth, and indium with respect to a sum of detection amounts of all metal elements is 99 atomic % or more.

The present disclosure relates to a composite electrode comprising a polymer containing carbon particles infiltrated by gallium or a gallium-indium alloy, a cathode electrode comprising silver oxide and a styrene-isoprene block copolymer (Ag 2 O-SIS) and a cathode current collector, and an anode electrode comprising gallium, carbon and a polymer and an anode current collector, a stretchable battery, wherein each of the cathode current collector and the anode current collector comprises a first current collector made of a composite material containing liquid metal eutectic gallium-indium (EGaIn), silver (Ag) and a styrene-isoprene block copolymer (SIS), and a second current collector layer made of carbon black (CB) and a styrene-isoprene block copolymer (SIS). The present disclosure also relates to a method for obtaining a composite electrode and a stretchable battery.

Provided is an anode including a metal porous body having a foam structure, a lithium-philic film formed on a surface of the metal porous body, and lithium impregnated into pores of the metal porous body.

This lithium ion secondary battery (1) has a negative electrode (12), a positive electrode (10), an aqueous electrolyte (16) containing a lithium salt, and a separation layer (14) arranged between the negative electrode (12) and the positive electrode (10). The aqueous electrolyte (16) is in contact with the positive electrode (10), and the separation layer (14) includes a non-aqueous solid electrolyte A in which a matrix polymer, the lithium salt and a hydrophobic ionic liquid are compounded.

The present application provides a method for preparing a positive electrode slurry, a positive electrode plate, a secondary battery, and a power consumption device. The method for preparing a positive electrode slurry includes a first stirring, a second stirring, a third stirring, and a fourth stirring, and during the first stirring, a positive electrode active material and an adhesive are mixed and stirred to prepare a dry mixture, during the second stirring, an adhesive and a solvent are mixed and stirred to prepare an adhesive liquid, during the third stirring, the dry mixture and the adhesive liquid are mixed and stirred to prepare a primary slurry, and during the fourth stirring, a positive electrode active material, a conductive agent, a solvent, and the primary slurry are mixed and stirred to prepare a positive electrode slurry, and the adhesive used in the first stirring is the same as the adhesive used in the second stirring.

The application provides a metal organic polyhedral cross-linked gel electrolyte and a preparation method and application thereof, and belongs to the technical field of secondary batteries and polymer electrolytes.The metal organic polyhedral cross-linked gel electrolyte is composed of a chemical cross-linked network, a zinc salt and a solvent; the chemical cross-linked network is constructed by a first polymer and a metal organic polyhedron through coordination bonding; and the metal organic polyhedral cross-linked gel electrolyte further comprises a second polymer interpenetrating in the chemical cross-linked network to form a semi-interpenetrating network structure.The cross-linked network structure of the gel electrolyte is stable and uniform, and structural defects of a traditional MOPs-based electrolyte are completely avoided; mechanical properties and toughness are synergistically improved, zinc negative electrode dendrite growth is effectively inhibited; low-temperature electrochemical performance is excellent, and application limitations of zinc-based batteries under extreme working conditions are broken through; an electrochemical cycle life is super-long, and excellent long-term service stability is exhibited; and dual-function characteristics are combined, and the preparation efficiency and use safety of zinc-based batteries are improved.

Th present disclosure relates to the field of energy storage devices such as lithium-ion batteries, sodium-ion batteries, and sodium anode-free batteries. More specifically, the present disclosure provides room temperature sodium-based batteries with an anode-free configuration, where no anode active material is present upon cell assembly and in its discharged state.

The present invention relates to a hydrogel and use thereof. More specifically, the present invention relates to a hydrogel comprising water and a polymer matrix, wherein the polymer matrix comprises a copolymer of a monofunctional monomer having a hydrophilic group and one ethylenic unsaturated group, and a polyfunctional monomer having no ester bond, and having an amide group and 3 to 6 ethylenic unsaturated groups, 40 to 95 parts by mass of the water, and 5 to 60 parts by mass of the polymer matrix are contained in 100 parts by mass of the hydrogel, and the hydrogel shows a swelling degree of 650% or less, when the hydrogel is immersed in a 4M aqueous KOH solution under a temperature of 25°C for 14 days, and use thereof.

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.

An electrolyte composition for a Zn-MnO2 electrochemical device, the electrolyte comprising water, zinc sulfate, and urea; a use of the electrolyte composition; and an electrochemical device comprising the electrolyte.

A nitrogen-containing branched polymer, an anion exchange membrane, and a method for preparing an anion exchange resin are provided. A molecular structure of the nitrogen-containing branched polymer includes a nitrogen-containing heterocycle, a branched structure, and an aryl group. The number of branching site of the branched structure is not less than 3. The aryl group is connected to the branching site of the branched structure through the nitrogen-containing heterocycle. The aryl group and the branched structure satisfy a relationship: A:B=80-99:1-20. A polydispersity index of the nitrogen-containing branched polymer is not greater than 2.6. A weight-average molecular weight of the nitrogen-containing branched polymer is in a range of 40,000 g / mol-500,000 g / mol.

There is provided an LDH separator including a porous substrate and a hydroxide ion-conductive layered compound that is a layered double hydroxide (LDH) and / or a layered double hydroxide (LDH)-like compound, filling up pores of the porous substrate. The proportion of the hydroxide ion-conductive layered compound in the LDH separator is 25 to 85% by weight.

The seal assembly for a battery cell includes a grommet having an opening with an inner surface. The nail has a nail head and a stem extending from the nail head. The stem includes a first portion having a larger diameter and a second portion having a smaller diameter, and the stem extends through the opening in the grommet. The stem 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 nail head. The trap gap defines a trap for a sealant. The sealant is disposed on the stem and is at least partially located within the trap.

An electrolyte composition for a Zn-MnO2 electrochemical device said electrolyte comprising water, zinc sulphate and urea, its use and an electrochemical device comprising said electrolyte.