101results about "Gel electrodes" patented technology

The present invention provides an electrode in which an electrode active material particles as being interconnected are applied on current collector, wherein the interconnected surface of electrode active material particles is coated with a polymer, the polymer being present as an independent phase, while maintaining a pore structure formed among the interconnected electrode active material particles as well as an electrochemical device including the electrode. Also, the present invention provides a method for manufacturing an electrode coated with a polymer present on an interconnected surface of electrode active material as an independent phase, while maintaining a pore structure formed among the electrode active material particles, which comprises the steps of: (a) coating slurry for an electrode including an electrode active material on a current collector and drying it to form an electrode; and (b) dipping the electrode obtained from step (a) into a solution containing the polymer dissolved therein and a method for manufacturing an electrochemical device comprising the electrode obtained by the above method. The electrode coated with a polymer as an independent phase provides an electrochemical device with improved safety and prevents degradation of performance of an electrochemical device.

The present invention provides an alkaline battery having good heavy-loading discharge characteristics even after long-term storage at high temperatures. The alkaline battery of the present invention comprises a positive electrode containing manganese dioxide and nickel oxyhydroxide as an active material, a negative electrode containing zinc as an active material, and an alkaline electrolyte. The positive electrode further contains at least one compound selected from the group consisting of an oxygen-containing zinc compound, an oxygen-containing calcium compound, an oxygen-containing yttrium compound, and an oxygen-containing titanium compound.

A gel film or an isolated gel film comprising sheets of graphene or chemically converted graphene at least partially separated by a dispersion medium, such as water, and arranged in a substantially planar manner to form an electrically conductive matrix.

An electrochemical cell includes an anode, a semi-solid cathode, and a separator disposed therebetween. The semi-solid cathode includes a porous current collector and a suspension of an active material and a conductive material disposed in a non-aqueous liquid electrolyte. The porous current collector is at least partially disposed within the suspension such that the suspension substantially encapsulates the porous current collector.

A secondary battery comprising a power generating part and a charging part, wherein the power generating part comprises an acidic medium in which a first electrode is disposed and a basic medium in which a second electrode is disposed; the acidic medium and the basic medium are disposed adjacent to each other; at least one of the acidic medium or the basic medium includes at least one reactive substance; and the charging part comprises a reactive substance regenerating device which regenerates the reactive substance from power-generation products produced by electric power generation in the power generating part.

A lithium polymer secondary battery comprising a negative electrode, a positive electrode and an electrolyte layer between both electrodes, wherein the negative electrode and the positive electrode each has a solid electrolyte prepared by incorporating an organic electrolytic solution into a polymer, the polymer is obtained by solidifying a precursor solution containing vinylene carbonate and a content of vinylene carbonate in the precursor solution for the positive electrode is smaller than that in the precursor solution for the negative electrode.

The present invention provides an alkaline battery having good heavy-loading discharge characteristics even after long-term storage at high temperatures. The alkaline battery of the present invention comprises a positive electrode containing manganese dioxide and nickel oxyhydroxide as an active material, a negative electrode containing zinc as an active material, and an alkaline electrolyte. The positive electrode further contains at least one compound selected from the group consisting of an oxygen-containing zinc compound, an oxygen-containing calcium compound, an oxygen-containing yttrium compound, and an oxygen-containing titanium compound.

The invention described herein is directed to a method of manufacturing an anode composition for use in an electrochemical cell, in which the anode comprises an electrochemically active material, the method comprising the steps of mixing the electrochemically active material with an alkaline electrolyte solution, an organic surfactant, an indium compound, and a gelling agent, such that the indium compound or a portion thereof is added in an alkaline environment.

A sulfonic acid type organic surfactant is incorporated into the gelled anode of an alkaline electrochemical cell, optionally with an organic phosphate ester surfactant. When the two surfactants are provided in a gelled anode in combination, discharge leakage is reduced and gel gassing is suppressed relative to that of gels lacking both surfactants. Additionally, cell discharge performance is improved relative to that of cells lacking both surfactant additives.

In order to provide a positive electrode material mixture for an alkaline battery, the positive electrode material mixtures having small weight variations, a granulated mixture with favorable fluidity is used which comprises graphite and a positive electrode active material containing at least one of manganese dioxide and nickel oxyhydroxide, and has an angle of repose of 20 to 43 degrees.

Alkaline electrochemical cells having extended service life and acceptable gassing and corrosion properties are disclosed. An amphoteric surfactant can be incorporated into the gelled anode mixture of an alkaline electrochemical cell, optionally with an organic phosphate ester surfactant or a sulfonic acid type organic surfactant or both. Zinc particles having a defined distribution of particle sizes can also be incorporated into a zinc anode. The electrolyte included in the anode mixture can have a reduced hydroxide concentration.

The present disclosure relates generally to an alkaline electrochemical cell, such as a battery, and in particular to an improved gelled anode suitable for use therein. More specifically, the present disclosure relates to a gelled anode that improves anode discharge efficiency by adjusting physical properties such as apparent density.

Methods of preparing sulfate salts of heteroatomic compounds using dialkyl sulfates as a primary reactant are disclosed. Also disclosed are methods of making ionic liquids from the sulfate salts of the heteroatomic compound, and electrochemical cells comprising the ionic liquids.

Methods of preparing sulfate salts of heteroatomic compounds using dialkyl sulfates as a primary reactant are disclosed. Also disclosed are methods of making ionic liquids from the sulfate salts of the heteroatomic compound, and electrochemical cells comprising the ionic liquids.

The portable power supply device in accordance with the present invention comprises at least one Zinc-Air battery module composed of at least one battery unit and a power transmission interface. In an embodiment, the power transmission interface can be selected from a charging connector, a charging socket or a charging cable with a linking connector. The portable power supply device can be connected to a portable electronic device through the power transmission interface, and can be applied to be the main power or the backup charging power for the portable electronic device. In an embodiment, the battery unit can be a primary Zinc-Air battery, rechargeable Zinc-Air battery, Zinc-Air battery with replaceable zinc plate, or Zinc-Air battery with replaceable zinc gel, and supply the voltage from 0.8V to 24V for well power charging to the portable electronic device. The power transmission interface is coupled to at least one pair of conductors of the Zinc-Air battery module, and for transmitting electric current generated by the Zinc-Air battery module. The Zinc-Air battery module and the battery unit are simultaneously made of at least one flexible material through integrated molding.

The present disclosure generally relates to an alkaline electrochemical cell comprising an additive for improved discharge performance. The additive is a finely dispersed superabsorbent material comprising particles having a substantially uniform shape and a small particle size relative to typical materials used in alkaline cells. The superabsorbent material results in enhanced discharge performance of the alkaline cell by increasing access of zinc to the electrolyte.

The invention relates to a preparation method of a silicon dioxide / titanium dioxide composite aerogel material, and also relates to application of silicon dioxide / titanium dioxide composite aerogel in a lithium battery negative electrode material. The silicon dioxide / titanium dioxide composite aerogel comprises nanoparticles of silicon dioxide and titanium dioxide and composite particles of the silicon dioxide and the titanium dioxide. The obtained silicon dioxide / titanium dioxide composite aerogel sample is low in density, stable in mechanical property and high in hydrophily. The preparation process is simple, is low in cost and is suitably used for achieving industrial production. The lithium battery negative electrode material prepared from the material has the advantages of high specific capacity and stable cycle performance. The composite aerogel has high porosity and favorable mechanical property, the volume change of an electrode material during the cyclic process is reduced, the problem of particle aggregation during the cyclic process is solved, thus, the electrochemical cycle stability is improved, and the composite aerogel is the lithium battery negative electrode which has wide application prospect.

A high-capacity enclosed nickel-zinc primary battery excellent in characteristics such as capacity maintenance factor, energy density, and high-efficient discharge characteristics, an anode using it, and a production method for them. An enclosed nickel-zinc primary battery which uses as an anode an anode active material of nickel hydroxide compound, such as nickel oxyhydroxide, particles and uses zinc alloy gel as a cathode material, wherein a ratio of anode theoretical capacity to cathode theoretical capacity is 1.0-1.6, and a ratio of alkali electrolyte to anode theoretical capacity is 1.0-1.6 ml / Ah.

The invention relates to a gel electrolyte precursor and application thereof. The gel electrolyte precursor comprises a gel skeleton monomer, a flexible additive, a polymerization initiator and a lithium salt. The gel skeleton monomer comprises an acrylonitrile monomer. An elastic porous gel electrolyte can be obtained by mixing the gel electrolyte precursor with an electrolyte, and carrying out in-situ polymerization gelatinization and baking. A semi-solid battery assembled by the gel electrolyte can absorb electrolyte in the battery and reduce the existence of free electrolyte in the battery, and meanwhile, the absorbed electrolyte and the elastic porous state gel electrolyte form a new gel electrolyte, so that the electrolyte is ensured to have high conductivity, and the electrical property of the battery is ensured; and meanwhile, the use amount of the electrolyte is reduced, and an acrylonitrile polymer formed by the acrylonitrile monomer in the in-situ polymerization and gelatinization process has good flame retardant property and high voltage resistance, so that the purpose of improving the safety performance of the battery is achieved.

The present invention provides an electrode in which an electrode active material particles as being interconnected are applied on current collector, wherein the interconnected surface of electrode active material particles is coated with a polymer, the polymer being present as an independent phase, while maintaining a pore structure formed among the interconnected electrode active material particles as well as an electrochemical device including the electrode. Also, the present invention provides a method for manufacturing an electrode coated with a polymer present on an interconnected surface of electrode active material as an independent phase, while maintaining a pore structure formed among the electrode active material particles, which comprises the steps of: (a) coating slurry for an electrode including an electrode active material on a current collector and drying it to form an electrode; and (b) dipping the electrode obtained from step (a) into a solution containing the polymer dissolved therein and a method for manufacturing an electrochemical device comprising the electrode obtained by the above method.The electrode coated with a polymer as an independent phase provides an electrochemical device with improved safety and prevents degradation of performance of an electrochemical device.

A method of manufacturing an anode composition for use in an electrochemical cell in which the anode comprises an electrochemically active material, the method comprising the steps of mixing the electrochemically active material with an alkaline electrolyte solution, an organic surfactant, an indium compound, and a gelling agent, such that the indium compound or a portion thereof is added in an alkaline environment. In one embodiment, the surfactant is added after the electrolyte.

The invention discloses a method for preparing an antimony-doped tin dioxide aerogel three-dimensional electrode through normal pressure drying and belongs to the technical field of electrocatalytic electrode preparation, and by means of the method, electrocatalytic oxidation efficiency of traditional two-dimensional electrodes is improved. The method comprises the steps of firstly, preparing antimony-doped tin dioxide aerogel through a sol-gel method, then conducting methyl silanization with tetraethoxysilane, replacing hydroxy on the surface of alcogel with silicon oxygen bond, forming a silicon oxide frame structure among tin oxide oligomer, and conducting solvent exchange, normal pressure drying and calcination to obtain the antimony-doped tin dioxide aerogel which is of a mesoporous structure and large in specific surface area. The antimony-doped tin dioxide aerogel prepared through the method has a three-dimensional network structure formed by crosslinking of nanoparticles and is high in specific surface area and large in number of electrochemical activity points, the defects that aerogel prepared through a supercritical drying method is high in energy consumption and dangerousness, easy to break in water and the like are overcome, and high application value is achieved in the electrochemical catalysis field.

In an aspect, a method for making a metal-containing material comprises steps of: forming a metal-containing hydrogel from an aqueous precursor mixture using a photopolymerization; wherein the aqueous precursor mixture comprises water, one or more aqueous photosensitive binders, and one or more aqueous metal salts; and thermally treating the metal-containing hydrogel to form the metal-containing material; wherein the metal-containing hydrogel is exposed to a thermal-treatment atmosphere during the step of thermally treating; wherein a composition of the metal-containing material is at least partially determined by a composition of the thermal-treatment atmosphere during the thermally treating step.

The present disclosure generally relates to an alkaline electrochemical cell comprising an additive for improved discharge performance. The additive is a finely dispersed superabsorbent material comprising particles having a substantially uniform shape and a small particle size relative to typical materials used in alkaline cells. The superabsorbent material results in enhanced discharge performance of the alkaline cell by increasing access of zinc to the electrolyte.

The present invention relates to a metal-air cell charging apparatus, to a metal-air cell assembly, and to a metal-air cell charging system comprising same. The present invention provides a metal-air cell charging apparatus for charging a metal-air cell assembly including a secondary metal-air cell having a negative electrode gel, and a case for accommodating the secondary metal-air cell therein, wherein the metal-air cell charging apparatus comprises: a charging unit which generates, using an external power source, power to be supplied to the metal-air cell assembly, and supplies the thus-generated power to the metal-air cell assembly; and a humidifying air supply unit which generates humidifying air containing a predetermined amount of moisture, and supplies the humidifying air to the interior of the case via a humidifying air supply port connected to the metal-air cell assembly.