130 results about "Coated electrodes" patented technology

The invention relates to the field of electrode material preparation, in particular to a graphene local in-situ coated electrode material and a preparation method thereof. The preparation method comprises the following steps: mixing a powdery electrode material with graphite, wherein the mass ratio of the graphite to the powdery electrode material is (0.0001-0.01): 1; and then mechanical grinding is carried out, so that the graphite forms graphene in situ under the action of mechanical force, the surface of the electrode material is coated with the graphene in situ by utilizing the adsorption force of a newly-generated nano surface and mechanical work, and the graphene locally-modified composite electrode material is obtained. According to the preparation method, extremely low graphite consumption is controlled, in-situ generation and coating of graphene are realized by utilizing a mechanical grinding one-step method, complex steps such as independent preparation of graphene and high-temperature sintering are omitted, the process is simple, and the cost is low; and the complete shielding of an ion transmission channel is avoided while an electronic conductive network is effectively constructed, so that the capacity, the cycling stability and the rate capability of the electrode material are remarkably improved.

The invention provides a novel metal-based nano catalytic coating electrode and a preparation method thereof.The metal-based nano catalytic coating electrode comprises a metal matrix and a conductive mechanism, and the metal matrix is sequentially provided with a corrosion-resistant middle layer, a transition layer, a nano-doped ceramic oxide active layer and a porous enamel ceramic isolation layer from near to far; and the metal substrate is fixedly connected with the conductive mechanism. The metal base body is of a plate-shaped structure, a net-plate-shaped structure or a plate-column-shaped structure. The corrosion-resistant middle layer of the metal-based nano catalytic coating electrode can prevent the metal matrix from being passivated in the electrolysis process, so that the service life of the electrode is prolonged; the plated layer can be used as a bonding bridge between the metal matrix and the doped ceramic oxide layer, so that the stress generated by sudden change of temperature, crystal form and the like in the coating preparation process is reduced, and the bonding force between the coating and the metal matrix is greatly improved; the porous enamel ceramic isolation layer can effectively prevent a solution from scouring the doped ceramic oxide active layer, and the service life of the doped ceramic oxide active layer electrode is prolonged.

The invention relates to a fluoropolymer coating composition that can be used, for example, in coating electrodes and / or separators in electrochemical devices. The fluoropolymer coating composition preferably contains multiple fluoropolymer phases. The coated electrodes and / or separators have both excellent wet adhesion, excellent dry adhesion, and low leachables. Each of the fluoropolymer phases contains polymers having at least 10 weight percent, of a common fluoromonomer, making the polymer phases compatible with each other, and allowing for the phases to be distributed fairly homogeneously on a macroscopic level throughout the composition and dried coating formed from the composition.

The invention relates to the technical field of metal oxide coating electrodes, in particular to a carbon nano hybrid material loaded metal oxide coating electrode and a preparation method of the carbon nano hybrid material loaded metal oxide coating electrode. And dissolving metal ions by using the metal ions as a solvent, uniformly coating the metal ions on the surface of titanium or titanium alloy subjected to certain surface treatment, and carrying out heat treatment to obtain a target electrode. The preparation method is simple in process and convenient to operate, the prepared electrode can effectively prevent a corrosion medium from permeating into the coating due to the existence of the nano hybrid material, the service life of the electrode is greatly prolonged, and the electrocatalytic activity of the electrode can be improved by optimizing electron transmission.

Some embodiments of the electrode drying degree measuring device are configured to measure the degree of drying of the center and side portions of the active material layer dried by the top surface drying device, which is positioned behind the top surface drying device, with reference to the machine direction (MD) of the current collector, with reference to the machine direction of the current collector. Some embodiments of the present invention enable the quantification of the degree of drying of the active material layer of the top surface coated electrode and to derive a correlation between the process variables of the top surface coating device and the top surface drying device and the degree of drying of the active material layer of the top surface coated electrode. Some embodiments of the present invention enable a rapid response when the drying of the active material layer of the top surface coated electrode is not properly performed and can prevent contamination of rollers located in front of the top surface drying device with reference to the machine direction of the current collector and / or rollers facing the back surface coating device.

A battery cell and a manufacturing method therefor, a battery device, and an electric device. The battery cell comprises an electrode sheet and a separator; the electrode sheet comprises a current collector and an electrode film layer located on at least one side of the current collector; the separator comprises a base film and a coating layer located on at least one side of the base film; and the electrode film layer and / or the coating layer comprises a gel region and a non-gel region, and the gel region comprises a gel electrolyte. The battery cell has improved cycle performance.

The method of the present disclosure for producing an electrode stack includes the following steps, and does not include a step of winding the laminate in a roll after step (c): coating the electrode mixture slurry on the transfer sheet 20, and drying the coated electrode mixture slurry to form an electrode active material layer (a), a step of providing the current collector 30 (b), and a step of transferring the electrode active material layer to at least one surface of the current collector to obtain a laminate (c). The method of the present disclosure for manufacturing a battery includes manufacturing an electrode stack by the method of the present disclosure.

The invention discloses a battery monomer and a preparation method thereof, a battery device and a power utilization device. The battery monomer comprises an electrode plate and an isolating membrane, the electrode plate comprises a current collector and an electrode membrane layer located on at least one side of the current collector, and the isolating membrane comprises a base membrane and a coating located on at least one side of the base membrane; the electrode film layer and / or the coating comprises a gel area and a non-gel area, and the gel area comprises gel electrolyte. The battery monomer provided by the invention has improved cycle performance.

The application provides a current collector and a preparation method and application thereof. The current collector comprises a current collector substrate and a primer layer on the surface of the current collector substrate, and the primer layer comprises a polymer lithium salt which can be ionized in a solution to obtain lithium ions and polymer anions. The application adds the polymer lithium salt which can be ionized in a solution to obtain lithium ions in the primer layer of the current collector. When the polymer lithium salt is used in an electrode tab, the local lithium salt concentration is improved, thereby solving the lithium ion diffusion problem in a thick-coated electrode and improving the rate performance of the battery.

The application provides a cold coke water treatment process and system. The cold coke water treatment process comprises the following steps: step one: after being collected by a coke storage pool, the cold coke water is filtered by a flat ceramic membrane to obtain concentrated coke water and dilute coke water, and the concentrated coke water is returned to the coke storage pool; step two: after being stored by a cold coke water tank, the dilute coke water is divided into dilute coke water I and dilute coke water II, the dilute coke water I is sequentially treated by a first-stage electro-catalytic oxidation unit, a second-stage electro-catalytic oxidation unit and a reverse osmosis unit to obtain purified water; and the dilute coke water II is used as cold coke water makeup water and recycled; the first-stage electro-catalytic oxidation unit is provided with an electro-catalytic oxidation reaction tank, the electro-catalytic oxidation reaction tank is provided with a cathode and an anode, the cathode is a titanium electrode, and the anode is a titanium-based metal oxide coating electrode; the second-stage electro-catalytic oxidation unit is provided with an electro-catalytic oxidation reaction tank, the electro-catalytic oxidation reaction tank is provided with a cathode and an anode, the cathode is a titanium electrode, and the anode is a boron-doped diamond electrode. The treatment process has good treatment effect and is environmentally friendly and economical.

A wobble laser processing apparatus according to an embodiment of the present invention comprises: a laser oscillator provided to oscillate a laser; and a wobble laser irradiator that is provided to, to process a partial area of a coating electrode which is traveling, irradiate the laser irradiated from the laser oscillator, to a coating electrode in a wobbling pattern, and that is capable of adjusting at least one of a wobbling width, a wobbling height, and a wobbling frequency on the basis of a traveling speed of the coating electrode.

An apparatus for drying a coated electrode includes a perforated plate nozzle located above a transfer path for the coated electrode. A duct is provided to connect to an area of the perforated plate nozzle that does not face the coated electrode among areas of the perforated plate nozzle. The duct may supply hot air flowing outside opposite ends of the coated electrode to a lower portion of the coated electrode.

The present invention relates to the electrochemical detection of an analyte by capacitance spectroscopy using a redox active polymer-coated electrode such as a polyaniline-coated electrode.

A composite active material has an electrode active material and a coating layer. The electrode active material includes an Si element. The coating layer coats a surface of the electrode active material. The coating layer contains a hydride solid electrolyte.

A press notching apparatus related to one embodiment of the present invention comprises: an upper mold that includes a first cut part for processing an electrode tab on a first uncoated part of a coated electrode, and a second cut part disposed to be spaced a predetermined interval apart from the first cut part in the width direction of the coated electrode so as to process a second uncoated part of the coated electrode; and a first length-adjusting part for connecting the first cut part and the second cut part, and moving the first cut part and / or the second cut part in the width direction of the coated electrode in order to adjust the interval.

The invention discloses an ultrathin flexible bendable polymer lithium ion battery and a preparation method and application thereof.The battery comprises an aluminum-plastic composite packaging film and a battery cell located in the aluminum-plastic composite packaging film, the battery cell comprises at least one negative pole piece and at least one positive pole piece, and the positive pole piece and the negative pole piece are symmetrically wrapped and stacked; at least one surface of the metal current collector of each pole piece is provided with a corresponding active material layer, a solid electrolyte gel film is arranged between every two adjacent pole pieces, and the pole piece positioned on the outermost side is thermally compounded with the inner layer of the aluminum-plastic composite packaging film through the solid electrolyte gel film; liquid electrolyte is fully permeated into active substance pores of the positive pole piece and the negative pole piece and micropores of the solid electrolyte gel film, and the thickness of the ultrathin flexible bendable polymer lithium ion battery is 0.2-0.5 mm. The structural design can effectively counteract the internal stress generated by the extension of the active material in the rolling process, so that the problem that the single-side coated pole piece is curled after being rolled is solved.

An electrochemical method for detecting hydrogen peroxide includes providing an electrochemical sensor comprising: a container holding an electrolyte; a coated electrode positioned in the container; and a counter electrode spaced apart from the coated electrode in the container, where the coated electrode includes a conductive substrate and a coating comprising a topological insulator on the conductive substrate. A voltage is applied to the coated electrode and the counter electrode, and a biological specimen is added to the electrolyte to form an analyte solution. Current density is measured. An increase in the current density upon forming the analyte solution indicates presence of hydrogen peroxide in the biological specimen.

Process for making a partially coated electrode active material wherein said process comprises the following steps: (a) Providing an electrode active material according to general formula Li1+xTM1-xO2, wherein TM is Ni and, optionally, at least one of Co and Mn, and, optionally, at least one element selected from Al, Mg, and Ba, transition metals other than Ni, Co, and Mn, and x is in the range of from zero to 0.2, wherein at least 50 mole-% of the transition metal of TM is Ni, (b) treating said electrode active material with an aqueous medium, (c) partially removing water by solid-liquid separation method, (d) treating the solid residue with an aqueous formulation of at least one heteropolyacid or its respective ammonium or lithium salt, (e) treating the residue thermally.

This invention relates to a non-fluorinated binder for lithium-ion battery cathodes, its preparation method, and its application, belonging to the field of cathode adhesive technology. The technical problem solved by this invention is to provide a non-fluorinated binder for lithium-ion battery cathodes. This binder comprises a resin binder, which is made from raw materials comprising the following parts by weight: 100 parts polybutadiene resin, 2-30 parts modified monomers, and 2-30 parts crosslinking agent. The non-fluorinated binder for lithium-ion battery cathodes of this invention contains no fluorine, exhibits stable performance, and has excellent electrolyte resistance, mitigating delamination or poor adhesion caused by coating volume expansion during charge-discharge cycles. It features high dispersion, high solids content, and high adhesion, meeting the requirements of thick-coated electrodes and high-compaction processes. It can reduce binder usage, improve product kinetic performance, and has a high electrochemical stability window. Electrodes prepared using the binder of this invention exhibit good flexibility.

This invention discloses a method for improving the physical properties of PVDF-based secondary battery slurry by adding calcium salts, relating to the field of battery slurry improvement technology. The method includes the following steps: Step 1: Weighing calcium salt and dissolving it in water to obtain a calcium salt solution, which is then mixed with an organic solvent; Step 2: Weighing PVDF and adding it to the solution while stirring to dissolve the binder in the organic solvent, resulting in a viscous liquid; Step 3: Weighing a conductive agent and adding it to the viscous liquid while stirring to mix the conductive agent and binder, resulting in a dispersion system; Step 4: Weighing an active material and adding it to the dispersion system while stirring to mix the active material with the conductive agent and binder, resulting in a battery slurry; Step 5: Coating the battery slurry onto a current collector, and then drying the coated electrode. By adding trace amounts of calcium salts to the slurry, the PVDF binder is rapidly dispersed in the organic solvent, effectively improving the adhesion between the battery slurry and the aluminum foil current collector.

Electrode for a secondary battery, comprising: a current collector; and an electrode active material layer located on at least one surface of the current collector, where the following relation expression 1 is satisfied: [Relationship expression 1] 1.0 ≤ B ei / B ci ≤ 2.0 where in relation expression 1 B ci a surface styrene-butadiene rubber-based binder content of a central section of the electrode active material layer in a lateral direction is and B ei a surface styrene-butadiene rubber-based binder content of a side section of the electrode active material layer in the width direction, where the interface styrene-butadiene rubber-based binder content is an average styrene-butadiene rubber-based binder content in the 10% thickness range based on the total thickness of the electrode active material layer in the thickness direction from the interface between the current collector and the electrode active material layer to the electrode active material layer, where the side section (112) is an area of ​​20% of the side based on the total width of the coated electrode part (11) along the x-axis, wherein the central section (111) is a region that excludes the side section in the coated electrode part (11).

The present application provides a graphite negative electrode sheet and a manufacturing method therefor, and a lithium-ion battery. The manufacturing method comprises: step S1, material mixing; step S2, coating; and step S3, magnetization: periodically performing N magnetization treatments on a coated electrode sheet to obtain the graphite negative electrode sheet, wherein N is an integer greater than or equal to 1. Each magnetization treatment comprises a first magnetization performed in a first direction, a second magnetization performed in a second direction, and a third magnetization performed in a third direction; the first magnetization, the second magnetization, and the third magnetization are performed in any order; and the first direction is perpendicular to a plane direction of the coated electrode sheet, and the second direction and the third direction are perpendicular to each other and parallel to the plane direction of the coated electrode sheet. In the present application, a coated electrode sheet coated with a graphite active material slurry undergoes three magnetization treatments to obtain an oriented graphite negative electrode sheet, which shortens the migration path of lithium ions during deintercalation, thereby achieving a high charge-discharge rate and excellent cycle performance.

This invention provides a method, system, and coating detection equipment for measuring the areal density of lithium-ion battery coated electrodes, relating to the field of coating detection technology. The method involves emitting X-rays from an X-ray source to penetrate the lithium-ion battery coated electrode. A detector is used to collect the background energy spectrum and sample energy spectrum before and after penetration. The attenuation coefficient curves of characteristic elements (such as Li, Co, and C) in the coating layer are combined with the mean square error results of the background and sample energy spectra to perform full-energy spectrum fitting, ultimately obtaining the optimal areal density value. This solves the radiation safety issues of existing β-ray methods and the interference from material optical properties in infrared methods, achieving non-destructive, high-precision, and simultaneous multi-element measurement of the areal density of lithium-ion battery coated electrodes.

The application discloses a kind of doped diamond-ruthenium oxide composite coating electrode preparation method and its application, including substrate and electrode working layer being arranged on the surface of substrate, the electrode working layer is double-layer film structure, from below to above, in order to doped diamond film layer and ruthenium oxide film layer, doped diamond particles are added in the ruthenium oxide film layer.This kind of composite coating electrode combines the advantages of oxide coating electrode and doped diamond electrode, while having heterojunction effect, with good conductivity, corrosion resistance and mechanical strength, can be used for electrocatalytic wastewater degradation, chemical battery positive light weight grid, electrochemical synthesis, electric signal detection, tail gas treatment and other related electrochemical fields.

The utility model provides an electrode plate water removal device. The electrode plate water removal device comprises: an unwinding part; a winding part; a first water removal assembly arranged between the unwinding part and the winding part, the first water removal assembly being used for baking the coated electrode plate; a roller pressing part arranged between the unwinding part and the winding part and located downstream of the first water removal assembly; and a second water removal assembly located between the roller pressing part and the winding part, the second water removal assembly being arranged at a discharge end of the roller pressing part, the second water removal assembly being used for secondary baking of the electrode plate pressed by the roller pressing part. The electrode plate water removal device of the technical scheme of the utility model can solve the problem of poor water removal effect of the existing water removal equipment for removing water from the electrode plate, long vacuum baking time before liquid injection, and prolonged battery production cycle.

This electrode substrate comprises a substrate, an electrode disposed on the substrate, and a coating that covers a portion of the surface of the electrode. The electrode has a first metal atom. The coating includes a first coating having a second metal atom that has an ionization energy lower than that of the first metal atom.

This invention provides an electrode, its preparation method, and its applications, belonging to the field of electrochemical technology. The electrode preparation method includes: placing an electrode substrate in a solution containing metal ions for a hydrothermal reaction to obtain an electrode substrate coated with a precursor; heating the precursor-coated electrode substrate to 500-800°C within 5-10 seconds, sintering for 80-200 seconds, and then cooling it to 30-60°C within 5-20 seconds to obtain the electrode. The electrode preparation method provided by this invention has a short heating time and a simple production process, which can significantly reduce electrode manufacturing time and save labor costs. The prepared electrodes have uniform quality control and stable performance, and can be well applied in wastewater treatment, drinking water purification, environmental protection, food processing, medical care, and fruit and vegetable preservation. It is particularly effective in algae removal and can remove toxic substances produced by algae, making it suitable for various aquatic environments.

The invention discloses a method for electro-catalytically synthesizing 6-aminocapronitrile by using a coated electrode, which comprises the following steps: taking cyclohexanone and ammonium chloride as electrolyte, adopting a three-electrode system, and carrying out electro-catalytically synthesizing 6-aminocapronitrile in a RHE potential range of-0.6 V vs to-1.1 V vs at room temperature, wherein the catalytic electrode is formed by coating a catalyst on a substrate, the catalyst is CoOx / CuOx, CoOx or a mixture of CoOx and CuOx, and the substrate is foamy copper subjected to acid treatment and roasting; in the catalytic reaction process, cyclohexanone is subjected to hydrogenation reduction through a cathode to generate cyclohexanol and reacts with NH4 < + > to generate imine, and then the imine is further subjected to hydrogenation reduction on the cathode to generate 6-aminohexanol; the generated 6-aminohexanol is oxidized into 6-aminohexanal on the surface of the anode, the 6-aminohexanal reacts with NH4 < + > to generate 6-aminohexanamide, and the 6-aminohexanamide is further dehydrated to generate 6-aminocapronitrile. The preparation process is simple, easy to control and environmentally friendly, the raw materials are cheap and rich in resources, and the problems that traditional 6-aminocapronitrile synthesis is high in energy consumption, low in selectivity and dependent on precious metal catalysts are effectively solved.

1. A method for producing a partially coated electrode active material, the method comprising the steps of: (a) General formula Li 1+x TM 1-x providing an electrode active material of O2, wherein TM is Ni, and optionally at least one of Co and Mn, and optionally at least one element selected from Al, Mg, Ba, and B, and transition metals other than Ni, Co, and Mn, where x is in the range of 0 to 0.2, and at least 50 mol % of the transition metals in TM is Ni; (b) treating the electrode active material with an aqueous medium; (c) partially removing the water by solid-liquid separation; (d) treating the residue with a compound of Me, wherein Me is selected from at least one of aluminum, boron, phosphorus, antimony, magnesium, vanadium, and tellurium; (e) thermally treating the residue; Includes.