148 results about "Porous electrode" patented technology

The utility model provides a battery capable of quantitatively repairing the capacity of a lithium ion battery. The battery capable of quantitatively repairing the capacity of the lithium ion battery comprises a shell, and a battery cell, an energy supplementing system and a battery management system which are arranged in the shell, the energy complementing system is connected with the battery management system through a wire harness; the battery cell comprises a cathode, a third electrode and an anode; the third electrode is used for supplementing lithium for the cathode and the anode; the third electrode is a porous electrode or a mesh electrode; the number of the negative electrodes and the positive electrodes is greater than or equal to 1; a layer of third electrode is arranged between each pair of negative electrode and positive electrode; the battery management system is connected with the negative electrode, the third electrode and the positive electrode through wire harnesses. The third electrode serving as a lithium supplementing electrode is arranged between the positive electrode and the negative electrode, the size of the third electrode is equivalent to that of the positive electrode, the third electrode is of a porous structure or a net structure, lithium ion transmission between the positive electrode and the negative electrode is not blocked, and the third electrode can stably exist in the electrolyte when not working (dormancy).

An air-coupled ultrasonic scanning platform for an air-coupled ultrasonic non-contact metrology of battery electrodes that maps the local variation in density and thickness, and detect defects during electrode casting and drying, includes: piezocomposite air-coupled transducers (Ultran) at 0.5 to 1 MHz that provide sufficient air coupling to enable sound waves to travel through air from a transmitting transducer, through the thin film electrode coated on metal current collector, and then into the receiving transducer. Non-contact, air-coupled ultrasound may be used as a technique for evaluating battery electrode films. An analytical model was derived from fundamental acoustic wave propagation principles to determine acoustic density. Voltage gain or acoustic density maps of electrode films revealed features that are not visually apparent, attributed to mass gradients.

The invention belongs to the field of electrochemical energy storage, and discloses an electrode suitable for an organic flow battery and a preparation method of the electrode. The electrode comprises a porous electrode substrate and an amino functional group loaded on the surface of a pore channel, and the electrode substrate is prepared by taking mixed powder of noble metal, rare earth metal and titanium alloy as a raw material. A selective laser melting process is adopted to prepare a porous electrode substrate, and then an electrostatic self-assembly process is adopted to load amino functional groups on the surfaces of pore channels. The electrode has a porous structure with a high specific surface area, and can provide sufficient reaction sites for electrochemical reaction. Meanwhile, the loaded amino functional group can enhance the activity and stability of positive and negative electrode electrochemical substances. The electrode base material comprises a noble metal with catalytic activity and a rare earth metal, and an active rare earth oxide layer doped with a noble metal oxide can be formed on the surface of the electrode after printing. According to the electrode, the energy efficiency of the organic flow battery can be improved, and the stable cycle index and the service life are prolonged on the basis of maintaining the energy efficiency.

The invention belongs to the technical field of solid-state batteries, and provides a sodium ion solid-state electrolyte as well as a preparation method and application thereof. The electrolyte comprises a polymer matrix, sodium salt and a polar organic compound, the polymer matrix includes a first monomer and a second monomer. The preparation method comprises the following steps: mixing sodium salt and a polar organic compound to obtain a eutectic mixture; mixing a first monomer and a second monomer with the eutectic mixture to obtain a precursor solution; and coating a mold with the precursor solution, and curing. The invention also discloses a solid-state sodium ion battery comprising the electrolyte. The sodium ion solid electrolyte disclosed by the invention is high in room-temperature ionic conductivity, excellent in stretchability, high in breaking strength and tensile elongation and incombustibility. And by introducing the composite material into a porous electrode and tightly combining the composite material with active material particles in the electrode, the problem of stress failure of the electrode under low stacking pressure is solved, and good cycling stability of the all-solid-state battery under the low stacking pressure or even under the condition that no external pressure is applied is realized.

According to the membrane-free electrochemical energy storage device, in the thickness direction of a partition plate, a first energy storage device and a second energy storage device are arranged on the two sides of the partition plate correspondingly and connected with the partition plate; the first energy storage device comprises a first end plate, a first sealing gasket, a first current collector, a first gas diffusion electrode, a first porous membrane, a first auxiliary electrode, a second porous membrane, a first porous electrode, a second current collector and a second sealing gasket; the second energy storage device comprises a second end plate, a third sealing gasket, a third current collector, a second gas diffusion electrode, a third porous membrane, a second auxiliary electrode, a fourth porous membrane, a second porous electrode, a fourth current collector and a fourth sealing gasket; the metal strip is connected between the first auxiliary electrode and the second auxiliary electrode. Therefore, the membrane-free electrochemical energy storage device provided by the invention can perform short-term energy storage and can also perform long-term energy storage, and the energy storage effect and the energy storage cost can be both considered.

This invention belongs to the field of metal powder preparation technology, and discloses a porous nickel powder, its preparation method, and its applications. The method includes: preparing nickel oxalate powder as a precursor; forming a nickel coating layer on the surface of the nickel oxalate powder by chemical plating to obtain nickel oxalate@nickel core-shell structured composite particles; subjecting the composite particles to pyrolysis annealing treatment, causing the internal nickel oxalate to decompose and generate gas, and the external nickel coating layer to transform into a porous metal framework, thereby obtaining porous nickel powder. This method is simple, low-cost, and produces nickel powder particles with uniform size, stable pore structure, good connectivity, and large specific surface area, making it suitable as a precursor for electrocatalytic active materials or porous electrode materials.

The application discloses a multi-scale hierarchical porous electrode and a preparation method and application thereof, and relates to the technical field of electrode preparation. The multi-scale hierarchical porous electrode comprises a substrate and a carbon network modification layer modified in the substrate; the carbon network modification layer is formed by carbonization of amphiphilic polymers, the amphiphilic polymer molecular chains contain hydrophilic groups and hydrophobic groups at the same time, can be dissolved in water and oil respectively, and can play a stabilizing role at the liquid-liquid interface; the phase separation of the polymers between fibers is driven by solvent controlled evaporation, and solidification is achieved; and finally, the electrode is obtained by high-temperature carbonization. The application improves the active sites without destroying the macro-pores of the carbon cloth, adopts a liquid-liquid phase separation method to construct a multi-scale carbon network on the fiber surface in situ, spontaneously induces a surface tension during a solvent drying process, forms a modification structure with different pores on the surface of the carbon fiber and between the fibers, improves the electrochemical performance of the electrode, and can improve the energy and power density of the battery.

The application relates to a control method and device of a massage instrument, the massage instrument and a storage medium. The massage instrument comprises an electrode assembly for outputting an electric pulse signal and a liquid storage device for storing conductive liquid, and the electrode assembly comprises at least one group of micro-porous electrode pairs; the method comprises the following steps: detecting a wearing state of the massage instrument; when the massage instrument is in the wearing state, the conductive liquid stored in the liquid storage device is introduced into the electrode assembly, and the conductive liquid is exuded through the micro-pores on the micro-porous electrode pairs in the electrode assembly. The scheme provided in the application can increase the contact area between the skin of a user and the electrode assembly, reduce the impedance value of the electrode assembly, and improve the use experience of the user.

A system and method for producing a porous electrode with a high level of porosity, preferably mesoporosity, without the use of a binder. The electrode is formed by depositing a layer on a substrate from a colloidal suspension containing aggregated or agglomerated nanoparticles. Deposition methods include electrophoresis, ink-jet printing, doctor blade, roll coating, curtain coating, or dip-coating. The process includes drying and may involve additional consolidation steps such as pressing and / or heat treatment to enhance structural integrity, electrical conductivity, and adhesion. The heat treatment induces partial coalescence of nanoparticles, creating a three-dimensional porous structure that facilitates ion mobility. A thin coating of an electrically insulating or ion-conductive material may be applied to reduce interfacial reactions. The resulting porous electrode may be used in energy storage applications, such as lithium-ion batteries. The invention also includes a method for manufacturing batteries utilizing these electrodes and related battery designs.

The invention relates to the technical field of new energy hydrogen production and chemical coupling application, and discloses a natural gas hydrogen-doped pipeline conveying system which comprises an energy supply layer, a chemical production layer, a digital integrated platform and a dispatching control module. The energy supply layer integrates photovoltaic power, wind power, nuclear power and a power grid standby power supply through a direct-current micro-grid, is matched with a sodium ion flow battery energy storage system, and supplies energy to the water electrolysis hydrogen production system of the non-noble metal catalyst and porous electrode structure. In the chemical production layer, pipeline steel or double-layer alloy steel is selected as a hydrogen-doped pipeline according to the proportion, a hydrogen concentration monitoring and sound wave leakage detection system is arranged, the hydrogen-doped safety upper limit of high pressure of 10% and low pressure of 30% is set, and a chemical hydrogen using system is connected through a gas distribution valve set and adjusted by an intelligent module. The digital platform is based on monitoring of the Internet of Things, hydrogen doping is optimized by means of a fuzzy PID algorithm and digital twinning, and risks are early warned. The scheduling module combines wind and light prediction and real-time electricity price, optimizes the start and stop of the electrolytic cell, the hydrogen doping ratio and the conveying pressure, and achieves efficient and stable conveying.

The application relates to the technical field of sewage treatment, and discloses a perfluorooctyl sulfonic acid in-situ remediation multi-layer porous electrode electrochemical oxidation device which comprises a protective cover internally provided with a pipeline; an electrode plate which is arranged below the protective cover in parallel with the protective cover and is in communication with an external power supply; and a reaction grid which is arranged in underground water and is fixedly connected between the protective cover and the electrode plate, the top end of the reaction grid is in communication with the water channel in the protective cover, and the bottom end of the reaction grid is electrically connected with the electrode plate, wherein an oxidant is injected into the reaction grid through the pipeline to generate free radicals through electrochemical oxidation, and the free radicals are used for removing perfluorooctyl sulfonic acid pollutants in the underground water. The application can realize efficient underground water remediation, achieves satisfactory pollutant removal effect in a short time, can realize efficient utilization of resources, can be suitable for various underground water environments, and ensures that the remediated underground water meets environmental protection requirements.

The invention relates to the technical field of batteries, in particular to a common flexible thin film solid-state ion battery based on ultra-high molecular weight polyethylene and a preparation method of the common flexible thin film solid-state ion battery. The preparation method of the common flexible film solid-state ion battery based on the ultra-high molecular weight polyethylene comprises the following steps: S1, preparing a porous electrode; s2, preparing a diaphragm substrate; s3, preparing a current collector; and S4, assembling the battery. According to the method, efficient and low-cost manufacturing of the battery can be realized, and the battery has high interface stability, high ionic conductivity and excellent mechanical flexibility. The general flexible thin film solid-state ion battery based on the ultra-high molecular weight polyethylene is prepared by the preparation method; comprising a solid electrolyte layer, a porous electrode and a current collector, and the solid electrolyte layer is compounded on one side of the porous electrode through hot pressing; the current collector is an integrated current collector, and the integrated current collector is integrated on the other side of the porous electrode through a coating process; or the current collector is a porous current collector conductive film, and the porous current collector conductive film is compounded on the other side of the porous electrode through hot pressing. The battery has flexibility, safety and high energy density, the porous electrode and the solid electrolyte layer are firmly combined, the battery can be repeatedly bent without influencing the performance, and the battery is suitable for flexible electronic and wearable equipment.

The invention relates to a method for detecting the infiltration state of a lithium ion battery, which comprises the following steps of: performing in-situ electrochemical impedance spectroscopy test on the lithium ion battery in a liquid injection infiltration process to obtain impedance spectroscopy data changing along with infiltration time; performing fitting processing on the impedance spectrum data by using a preset equivalent circuit model; wherein the equivalent circuit model comprises a transmission line model element used for representing the impedance characteristic of the porous electrode; extracting a capacitance value corresponding to the transmission line model element from the fitting result; determining the infiltration state of the lithium ion battery according to the variation trend of the capacitance value along with the infiltration time; wherein the increasing rate of the capacitance value is positively correlated with the infiltration rate of the electrolyte in the lithium ion battery. The invention also relates to equipment for detecting the infiltration state of the lithium ion battery, a medium and a computer program product.

The utility model is applicable to the technical field of battery simulation, and provides a flow battery based on a bionic vein-shaped runner, which comprises two electrode modules and an ion exchange membrane, and the two electrode modules are connected with each other through the ion exchange membrane; the electrode module comprises a runner plate and a porous electrode, and the runner plate is provided with a liquid inlet runner, a liquid outlet runner and a plurality of branch runners; the liquid inlet runner is positioned in the center of the runner plate, and the liquid outlet runners are positioned at four corners of the runner plate; the branch flow channels are sequentially arranged between the liquid inlet flow channel and the liquid outlet flow channel to form a vein-shaped flow channel form; the branch flow channels are arranged in a central symmetry mode and communicate with the liquid outlet flow channel. According to the flow battery, a vein fractal flow channel technology is developed based on a biological mimicry principle, and double advantages of a radial main vein and a fractal secondary network are fused, so that electrochemical reaction rates of all parts of the surface of the electrode are kept highly consistent, and the overall capacity of the battery is remarkably improved.

The invention discloses a composite porous electrode material as well as a preparation method and application thereof. The composite porous electrode material takes a cellulose nanofiber porous composite material as a carrier and is loaded with a metal oxide active component; the metal oxide is one or more modified structures constructed by heteroatom doping and oxygen vacancy defects. The efficient photoelectric cathode integrating CO2 adsorption and catalytic conversion is constructed, and the effect of remarkably improving CO2 reduction activity and product selectivity is achieved.

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

The present disclosure relates to systems and electroswing adsorption cells with patterned electrodes. The patterned electrode includes a plurality of electrolyte regions, a plurality of gas regions and a porous conductive scaffold. The porous conductive scaffold extends into the plurality of electrolyte regions and includes an electroactive species. Methods for the manufacture of the electrode, the electroswing adsorption cell and gas separation systems including the electroswing adsorption cell are also described.

Provided is a porous electrode-supporting electrolyte membrane 20 to be used in a gas reduction device for reducing carbon dioxide, the porous electrode-supporting electrolyte membrane 20 having an electrolyte membrane 6 and a porous reduction electrode 5 embedded in the electrolyte membrane 6, wherein part of the porous reduction electrode 5 is exposed at a prescribed surface of the porous electrode-supporting electrolyte membrane 20.

This invention discloses a gas-liquid split-flow micro / nano porous electrode device, comprising a U-shaped hollow substrate and a multi-level micro / nano pore directional flow channel system disposed on its wall. The directional flow channel system is divided into a nitrogen transport channel group on the inner wall side and an electrolyte transport channel group on the outer wall side. Both groups of channels are composed of several micropore arrays arranged in a staggered manner along the substrate wall thickness direction. The nitrogen transport channel group adopts a gradually expanding structure, allowing nitrogen to enter from the small-diameter end on the N2 main inlet pressure stabilizing chamber side and exit from the large-diameter end on the inner wall catalyst layer side, achieving directional enrichment and efficient transport of nitrogen. The electrolyte transport channel group adopts a gradually contracting structure, allowing the electrolyte to enter from the large-diameter end on the external environment side and exit from the small-diameter end on the inner wall catalyst layer side, suppressing excessive proton transport to the catalyst layer interface. This invention, through spatial isolation and independent control, simultaneously solves the problems of limited nitrogen mass transfer and severe hydrogen evolution side reactions in traditional electrodes, significantly improving ammonia yield and Faraday efficiency.

The application discloses a multi-scale hierarchical porous electrode and a preparation method and application thereof, and relates to the technical field of electrode preparation. The multi-scale hierarchical porous electrode comprises a substrate and a carbon network modification layer modified in the substrate; the carbon network modification layer is formed by carbonization of amphiphilic polymers, the amphiphilic polymer molecular chains contain hydrophilic groups and hydrophobic groups at the same time, can be dissolved in water and oil respectively, and can play a stabilizing role at the liquid-liquid interface; the phase separation of the polymers between fibers is driven by solvent controlled evaporation, and solidification is achieved; finally, the electrode is obtained by high-temperature carbonization. The application improves the active sites without destroying the macro-pores of the carbon cloth, adopts a liquid-liquid phase separation method to construct a multi-scale carbon network on the fiber surface in situ, spontaneously induces a surface tension during a solvent drying process, forms a modification structure with different pores on the surface of the carbon fiber and between the fibers, improves the electrochemical performance of the electrode, and can improve the energy and power density of the battery.

This invention discloses an internally tandem cement-based supercapacitor and its preparation method. The cement-based supercapacitor comprises one or more repeating units; each repeating unit includes a stacked cement-based electrolyte layer and a three-dimensional conductive unit layer; the three-dimensional conductive unit layer includes a three-dimensional porous conductive framework, divided into a lower porous electrode region, a middle ion-blocking conductive region, and an upper porous electrode region; the pores of the middle ion-blocking conductive region are densely filled with an insulating polymer, while the pores of the lower and upper porous electrode regions are loaded with electrochemically active materials; the outer peripheral sidewalls of the three-dimensional conductive unit layer are covered with in-situ mineralized ion-shielding rings to seal the ion short-circuit channels at the sidewall edges. The preparation method is compatible with the construction process of cement building components. This invention, through the design of the three-dimensional conductive unit layer and interface mineralization technology, achieves a synergistic multiplication of voltage window and energy density while effectively reducing the volume of the supercapacitor.

The invention discloses a uranium ore leaching method and a uranium ore leaching device, and relates to the technical field of hydrometallurgy. The invention provides a novel multifunctional uranium leaching system which is characterized in that porous electrode plates and conductive liquid injection pipes are arranged at the two ends of a horizontal rotary reaction cabin, contact electrification is realized by means of an anode wire and a cathode wire, and a uranium trapping net in the horizontal rotary reaction cabin is filled with ion exchange resin; uranyl ions are enriched on the ion exchange resin under the action of an electric field. The uranium ore structure is destroyed through mechanical force, reaction sites are exposed, uranium element oxidation and dissolution are promoted through advanced oxidation, uranyl ion migration is promoted through an electric field, the advanced oxidation reaction efficiency is improved, uranyl ions driven by the electric field are adsorbed through ion exchange resin in real time, and the three forms a synergistic strengthening effect. The acid consumption is obviously reduced; and the leaching efficiency and the recovery rate of uranium are improved.

The application relates to a preparation method of a multi-scale porous electrode with high activity and high conductivity, and relates to a preparation method of a multi-scale porous electrode with high activity and high conductivity.The application solves the technical problems of the existing OER electrocatalytic electrode surface smoothness, low activity and low conductivity.The application first utilizes selective laser melting to carry out a 3D printing preparation process of an electrode support, then utilizes an electrolyte activation solution to carry out secondary treatment, is called in-situ electrochemical activation treatment, realizes composite preparation of the multi-scale porous electrode, the smoothness of the originally smooth porous electrode surface is destroyed through the constant-voltage in-situ electrochemical activation process, the electrode support surface becomes rough, the electrode surface presents a nanoscale microstructure morphology, the surface structure doubles the specific surface area of the electrode structure, and further increases the activation sites of chemical reactions, so that the electronic conductivity of the electrode and the electrocatalytic activity of large-current electrolysis application can be enhanced.

High-throughput microfluidic devices comprising one or more fluidic microchannels each with at least one flow-through 3D structure comprising a 3D electrode, or alternatively a 3D permselective structure, and optional secondary bead bed(s) are disclosed. Such devices can be used for counter-flow focusing of charged species via ion concentration polarization and in situ quantification of electrokinetically enriched charged species from an ionically conductive solution by both optical and electrical detection.

The invention relates to the technical field of electro-catalysis and 3D printing, in particular to an ink direct-writing type 3D printing porous carbon electrode and a preparation method thereof, and is mainly applied to the electro-catalysis process of electro-synthesis of hydrogen peroxide. Carbon black powder and polytetrafluoroethylene are mixed to prepare printing slurry, and an ink direct-writing type 3D printer is used for preparing the porous electrode.

The present invention relates to a porous electrode having controlled pore size and a method for manufacturing same and, more particularly, to a method for manufacturing a water electrolysis electrode and a water electrolysis electrode manufactured by the method of the present invention, the method comprising the steps of: preparing mixed metal powder including nickel powder and aluminum powder; filling the mixed metal powder into a mold formed in the shape of an electrode; applying pressure to the filled mixed metal powder to form a molded body; subjecting the molded body to first heat treatment in a reducing atmosphere; treating the heat-treated molded body with a basic solution to leach an aluminum component; and performing second heat treatment in a reducing atmosphere.

The utility model discloses a kind of self-breathing diaphragm-free hydrogen peroxide electric synthesis systems, it is related to electrochemistry technical field.The system includes raw material pretreatment area, product collection area, electrolytic reaction zone, power supply area and gas purging area;Raw material pretreatment area is equipped with electrolyte storage tank, make-up pump, delivery pump, electrolyte raw material storage tank and high concentration product feed pump, electrolytic reaction zone is equipped with membraneless electrocatalytic reactor, membraneless electrocatalytic reactor includes anode catalytic electrode and cathode catalytic electrode, cathode catalytic electrode uses self-breathing three-dimensional porous electrode.The system of the utility model uses self-breathing diaphragm-free electrocatalysis method, by air self-suction directly utilizes ambient oxygen to realize hydrogen peroxide in-situ synthesis, significantly reduce the system energy consumption, while eliminating the dependence on proton exchange membrane, and can construct dynamic pH buffering mechanism to realize "interface proton dynamic balance", improve the ion concentration gradient problem of electrochemical device.

The present application relates to a kind of porous dry method electrode preparation methods, active material, powder binder and powder pore-forming agent are added in mixer, after being mixed uniformly, the powder mixture with uniform particle size distribution is obtained by pulverizer, high shear is provided by twin-screw extruder or open mill, powder binder is fiberized so that sheet forming is formed, further by rolling, the electrode sheet film with target compactness and thickness is formed, finally by heating and drying or solution infiltration treatment to the electrode containing electrode sheet film, porous electrode is obtained.The porous dry method electrode preparation method is simple and easy to operate, and the manufacturing cost is low, suitable for industrialized production application.

Disclosed are methods for fabricating a porosity gradient electrode. Also disclosed are porous electrodes. In this process, a single-phase mixture of scaffold-forming polymers dissolved in a solvent is driven into two-phases by a non-solvent, yielding a scaffold which can subsequently be thermally annealed into a carbonaceous and electrochemically active material.