251 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 discloses solid electrolyte powder and a preparation method and application of the solid electrolyte powder, and the solid electrolyte powder comprises solid electrolyte particles, the material of the solid electrolyte powder comprises at least one of an NASICON type phosphate solid electrolyte and a doped derivative thereof, a garnet type lithium lanthanum zirconium oxide solid electrolyte and a doped derivative thereof, and a perovskite type lithium lanthanum titanium oxide solid electrolyte and a doped derivative thereof, the particle size D50 of the solid electrolyte particles is less than or equal to 500nm, and D90 / D50 is less than or equal to 3.0; the specific surface area of the solid electrolyte particles is greater than 20 m < 2 > / g. The solid electrolyte powder is directly prepared, the solid electrolyte particles contained in the solid electrolyte powder are nano-sized and are uniform in particle size, good in dispersity and low in agglomeration degree, the surface of an electrode material can be directly coated with the solid electrolyte powder through a dry method during use, a large amount of solvent does not need to be dried, the process is simple and convenient, and the cost is low. And the production cost of the solid electrolyte coated electrode material is greatly reduced.

The utility model relates to the technical field of batteries, in particular to a pole piece and a battery. The pole piece active substance layer comprises n sub active substance layers, and each sub active substance layer comprises a main body region and a thinned region; the main body region comprises a first surface far away from the current collector, and the thinned region comprises a second surface far away from the current collector; each sub active material layer comprises a third surface close to the current collector; the current collector comprises a fourth surface close to the active material layer; in every two adjacent sub active material layers, the projection of the first surface of the sub active material layer close to the current collector on the current collector coincides with the projection of the third surface of the sub active material layer far away from the current collector on the current collector; the included angles between the second surfaces and the fourth surfaces of the first sub-active material layer,..., and the nth sub-active material layer are sequentially recorded as theta 1,..., theta n; [theta] 1, [theta] 2,... [theta] n are each independently 0.3-3 degrees, and [theta] 1, [theta] 2,... [theta] n are equal. The design of the electrode plate can effectively improve the edge bulging problem of the multi-layer coated electrode.

The invention provides a method for recycling valuable substances and cyanide in cyanide-containing wastewater, and belongs to the technical field of cyanide-containing wastewater treatment. The method comprises the following steps: firstly, carrying out replacement reaction on a physicochemical material (reducing substance zinc) and a copper-cyanogen complex in the cyanogen-containing wastewater to displace copper, and filtering to obtain filter residues containing zinc and copper, so as to realize copper recovery; in the replacement reaction, the copper-cyanogen complex in the filtrate is converted into a zinc-cyanogen complex with a lower stability constant, and then the zinc in the filtrate is recycled by diaphragm electrolysis. The method specifically comprises the following steps: dividing an electrolytic cell into a cathode region and an anode region by utilizing a membrane material, and enabling electrode reactions to be independently carried out, so that cyanide is prevented from entering the anode region to generate electrochemical oxidation and the decomposition of the cyanide is inhibited, and the cyanide is recycled in a solution for cyclic utilization; and then an alkali-resistant titanium-based coating electrode is used as an anode plate, a porous material is used as a cathode plate, recovery of zinc on the cathode plate is promoted, and recovery of valuable metal zinc and copper and cyclic utilization of cyanide are achieved.

The present application provides a battery cell, a battery and an electric device. The battery cell comprises an electrode assembly, a casing and coatings, wherein the electrode assembly is accommodated in the casing; the casing is provided with welding parts, and the welding parts are electrically connected to tabs of the battery cell; and the coatings are arranged on the outer side of the casing and cover the welding parts. By means of making the coatings cover the welding parts, the welding parts are protected, thereby reducing the possibility of rusting of the welding parts and facilitating the improvement in reliability of the battery cell.

The invention relates to the technical field of pole piece manufacturing, in particular to a pole piece coating and diaphragm compounding all-in-one machine which comprises a first diaphragm unreeling mechanism, a second diaphragm unreeling mechanism and a coating mechanism, the first diaphragm correcting mechanism is used for correcting the unwound first diaphragm coiled material; the first diaphragm tension control mechanism is used for monitoring and controlling the tension of the unwound first diaphragm coiled material; a pole piece unwinding mechanism; a pole piece coating mechanism; a pole piece curing mechanism; the pole piece tension control mechanism is used for monitoring and controlling the tension of the coated pole piece coiled material; the layering guide mechanism is used for guiding and layering the unreeled first diaphragm coiled material and the coated pole piece coiled material; the alignment detection mechanism is used for detecting the vertical alignment degree; the thermal compounding mechanism is used for carrying out thermal compounding operation on the layered material to form a composite pole piece; and the winding mechanism is used for winding the composite pole piece. The device has the effects that the consistency and reliability of the composite pole piece are improved, and meanwhile, the influence of winding and stentering procedures on the performance of the coated pole piece is reduced.

The invention discloses a gas spark switch coating electrode and a preparation method and application thereof, and belongs to the technical field of high-power pulse. The gas spark switch coating electrode comprises a gas spark switch metal electrode substrate and a surface composite graphite coating, the preparation method comprises the following steps: (1) performing injection on the surface of the gas spark switch metal electrode substrate to form the superficial nanometer strengthening layer; and (2) sequentially depositing an intermediate transition layer, an in-situ gradient growth composite layer and a titanium-doped graphite-like layer on the surface of the superficial nanometer strengthening layer, and periodically and repeatedly depositing to obtain the titanium-doped graphite-like composite layer. The gas spark switch coating electrode has excellent conductivity, ablation resistance and strong interface bonding performance, and can obtain an effective thickness of 10-20 [mu] m by regulating and controlling cycle repetition times, so that the gas spark switch coating electrode can show uniform ablation morphology and relatively low ablation loss under high-power, high-voltage and large-current breakdown test conditions; and a long-service-life electrode solution is provided for a high-pulse power device.

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 belongs to the field of medical instruments, and particularly relates to an absorbable pace-making wire, which comprises a chest wall penetrating steel needle, a magnesium metal wire, a zinc film coated electrode, a single-strand wire, a coil and a curved needle, the magnesium metal wire is mounted at one end of the chest wall penetrating steel needle, and the zinc film coated electrode is mounted at one end of the magnesium metal wire; one end of the zinc film wrapped electrode is provided with the single-strand wire and the coil, one end of the single-strand wire and one end of the coil are provided with the curved needle, the magnesium metal wire is wrapped by a layer of absorbable material film (such as polycaprolactone material), and the electrode part of the magnesium metal wire in contact with the cardiac muscle is not provided with a polymer coating and is only wrapped by zinc foil. According to the invention, a temporary cardiac pacing effect can be achieved after an operation, and slow degradation and absorption can be gradually realized by a human body in about one year. Complication and secondary operation are avoided, performance is improved by means of innovative materials, electric signal transmission is guaranteed through structure optimization, and a better choice is provided for temporary pacing in cardiac surgery.

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 present invention provides a coated particulate material comprising a plurality of core particles wherein each core particle comprises at least one compound of formula (I), Li1 + w [Ni1-x-y-zCoxMnyMz] 1-wO2, and the surface of the core particles exhibits a coating comprising at least one polycationic organic polymer or at least one polyanionic organic polymer.

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.

The invention discloses a method for coating, baking and directionally removing impurities of a pole piece. The method comprises the following steps: feeding the coated pole piece into a coating oven for baking; calculating the saturated vapor pressure and the saturated vapor concentration of the binder according to the slurry parameters on the surface of the pole piece and the operating parameters of the coating oven; binder saturated steam is injected from one end of the coating drying oven, so that the gas partial pressure of the binder in the coating drying oven reaches the saturated steam pressure of the binder, and gas after impurity removal is discharged from the other end of the coating drying oven; the concentration of the dispersing agent steam in the exhausted gas is obtained in real time, the injection rate of the binder saturated steam is adjusted according to the change rate of the concentration of the dispersing agent steam, and the impurity removal progress is monitored. According to the invention, by injecting the binder saturated steam into the coating oven, the volatilization of the binder is inhibited, the preferential volatilization of the dispersant is promoted, the impurity removal is realized, the pole piece defect caused by the volatilization loss of the binder in the pole piece baking process is avoided, and the battery manufacturing yield and the product performance are further improved.

The invention relates to the technical field of batteries, in particular to a method for evaluating the surface coating effect of an electrode material. The evaluation method for the surface coating effect of the electrode material comprises the following steps: respectively preparing an electrode material, a coating material and a coated electrode material to be tested into electrode plates under the same condition; respectively preparing the batteries from the electrode plates under the same condition; performing electrochemical impedance spectroscopy test on each battery; analyzing the obtained electrochemical impedance spectrum of each battery based on a relaxation time distribution method to obtain a relaxation time distribution curve; taking the relaxation time distribution curve of the battery containing the electrode material and the battery containing the coating material as a standard curve, and comparing and analyzing the relaxation time distribution curve of the battery containing the to-be-detected coating electrode material with the standard curve so as to evaluate the coating effect of the to-be-detected coating electrode material. According to the method, the surface coating effect of the electrode material can be simply, effectively and accurately evaluated.

A battery cell (100) and a manufacturing method therefor, a battery (1100), an electric device, and an energy storage device. The battery cell (100) comprises a casing (11), an electrode assembly (12), and a first insulating coating (13). The electrode assembly (12) is arranged in the casing (11). The casing (11) comprises an outer surface (113) facing away from the electrode assembly (12); and at least part of the outer surface (113) is covered with the first insulating coating (13). The connection strength between the first insulating coating (13) and the casing (11) is good, and the first insulating coating (13) is not easy to fall off, so that the insulation performance of the battery cell (100) can be improved.

An electromechanically auxetic structural element defined by the application of coated electrodes on the larger two main surfaces encompassing the triply periodic minimal surface structures made of active materials that deform under the actuation of electrical fields. A structural element (10) comprising a base structure (11) defined by a triply periodic minimal surface having a thickness and two main surfaces that separated two disjoint sub-volumes (12, 14), wherein the base structure is made of an electromechanically functional material, wherein the surface (12') of the first sub-volume comprises a first coating of a first electrically conductive material (16), wherein the surface (14') of the second sub-volume comprises a second coating of a second electrically conductive material (16), and wherein the coating of the first sub-volume is arranged to not be in electrical contact with the coating of the second sub-volume. This structural element can fill any 3D-shaped volume, imparting an auxetic electromechanical response to the overall device (sensor, actuator or transducer).

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.

To provide a manufacturing method of an electrode capable of improving the productivity.SOLUTION: A manufacturing method of an electrode includes: a coating step of coating a base material with electrode slurry; an electrode mixture layer formation step of drying the electrode slurry, and forming an electrode mixture layer; a press step of pressing the electrode mixture layer on the base material; a first dry step of drying the electrode mixture layer under a first dew point; a second dry step of drying the electrode mixture layer under a second dew point that is lower than the first dew point after the first dry step; and a third dry step of drying the electrode mixture layer under a third dew point that is lower than the second dew point after the second dry step. The press step and the first dry step are executed in the same first section, and the first section of the first dry step, a second section of the second dry step, and a third section fo the third dry step are connected.SELECTED DRAWING: Figure 1

Aspects of the disclosure include a double-coated electrode for dual-chemistry cathode systems and methods of manufacturing the same. An exemplary vehicle includes an electric motor and a battery pack electrically coupled to the electric motor. The battery pack includes a battery cell that includes an anode current collector, an anode active material layer in direct contact with a surface of the anode current collector, a cathode current collector, and a cathode active material layer in direct contact with a surface of the cathode current collector. The cathode active material layer includes a dual-chemistry electrode having a first cathode layer in direct contact with the cathode current collector and a second cathode layer positioned directly on the first cathode layer. The first cathode layer and the second cathode layer are made of materials having at least one of a different particle size distribution and a different chemical makeup.

The invention discloses a polymer-coated electrode material, a preparation method thereof and a solid-state battery, and belongs to the technical field of lithium ion batteries. The preparation method of the polymer-coated electrode material comprises the following steps: mixing a polymer monomer, a lithium salt, a photoinitiator and a solvent to obtain a coating agent; and mixing a to-be-coated electrode material with the coating agent, and carrying out photo-initiation polymerization to obtain the polymer-coated electrode material. The polymer-coated electrode material is composed of the electrode material and the brush polymer tightly coating the surface of the electrode material, and the brush polymer can significantly improve the electrochemical performance of the electrode material, improve the interface stability and compatibility and optimize ion transmission, thereby improving the performance of the electrode material in lithium batteries and other applications.

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.

The invention relates to a positive electrode material, a positive electrode plate, a lithium secondary battery, a battery module, a battery pack and a device. The positive electrode material provided by the invention comprises lithium iron phosphate single-crystal particles and lithium iron phosphate secondary particles. Wherein the lithium iron phosphate secondary particles have a low specific surface area, so that the consumption of a binder and a solvent in the pulping process can be reduced, the solid content of slurry is increased, and the processing performance of the thick coated pole piece is improved. And meanwhile, gaps among the lithium iron phosphate secondary particles are fully filled with the lithium iron phosphate single crystals, so that the compaction density of the pole piece can be further improved, and the diaphragm resistance of the positive pole piece is reduced, thereby improving the gram volume exertion and cycle performance of the lithium secondary battery.

The invention relates to the technical field of pole piece manufacturing, in particular to a coated pole piece drying and tempering process based on constant-temperature contact and variable-temperature radiation heating, which comprises the following steps: unwinding a pole piece, and coating one surface of the pole piece; the coated pole piece is wound on a heating roller, a plurality of heating assemblies used for emitting heat radiation are arranged on the side, making contact with the pole piece, of the heating roller in the perimeter direction of the heating roller, the heating assemblies are divided into a plurality of temperature changing sets in sequence, the temperature of the heating assemblies under each temperature changing set is adjusted and controlled, and the heating roller and the heating assemblies conduct the baking procedure synchronously. The device has the effects that the baking efficiency and the heating uniformity of the coating material are improved, the function of segmented heating is achieved, and the risk that drying is discontinuous or the pole piece shrinkage rate exceeds the standard is reduced.