23 results about "Pseudocapacitor" patented technology

The invention belongs to the field of electrochemistry, and particularly relates to a method for electrochemical lithium extraction of a decommissioned lithium battery assisted by a pseudocapacitor cathode, which comprises the following steps: a) providing an anode electrode and a cathode electrode; the anode electrode is an anode electrode made of a recycled retired lithium battery anode material or an retired lithium battery anode plate; the cathode electrode contains a Prussian blue analogue, the Prussian blue analogue is prepared by mixing citrate, transition metal salt and cyanide in water for reaction, and the transition metal salt is one or more of cobalt salt, ferric salt, copper salt and nickel salt; and b) immersing the anode electrode and the cathode electrode into the electrolyte, and electrifying to carry out electrochemical lithium extraction. According to the method, a pseudocapacitance material with a lithium discharging characteristic is adopted as a cathode to replace a common metal pole plate or a carbon material, a pseudocapacitance reaction with a corrected electrode potential is adopted to replace a hydrogen evolution reaction on the cathode of an existing system, and finally, low-energy-consumption and high-selectivity recovery of lithium is realized.

The invention provides an electro-adsorption desalting device and method based on the synergistic effect of double electric layers and a pseudocapacitor, the device comprises a shell, a cathode plate, an anode plate and a stabilized voltage direct current power supply, and the shell is provided with a water inlet and a water outlet; the cathode plates and the anode plates are detachably connected to the interior of the shell, the multiple cathode plates and the multiple anode plates are arranged in a staggered mode, the surfaces of the anode plates are coated with anode adsorption materials, the anode adsorption materials are formed by compounding carbon-series materials and pseudocapacitance materials with anion storage capacity, the surfaces of the cathode plates are coated with cathode adsorption materials, and the cathode adsorption materials are formed by compounding carbon-series materials and pseudocapacitance materials with anion storage capacity. The cathode adsorption material is formed by compounding a carbon-series material and a pseudocapacitance material with cation storage capacity; and the voltage-stabilized direct-current power supply is electrically connected with the cathode plate and the anode plate respectively. The desalting efficiency and the adsorption capacity of the water sample to be treated can be improved, the operation is simple, and the practicability is relatively high.

The invention discloses a preparation method of nickel-iron-based oxide / sulfide based on laterite-nickel ore and application of the nickel-iron-based oxide / sulfide in the field of supercapacitors, and belongs to the field of pseudocapacitor electrode material preparation and supercapacitors, and the nickel-iron-based oxide / sulfide is prepared by taking the laterite-nickel ore as a metal source and adopting an acid leaching-chemical deposition-calcination method. The nickel-iron-based oxide / sulfide prepared by the method is a pseudocapacitance type electrode material and has excellent energy storage property. The preparation process is simple, the laterite-nickel ore is used as a transition metal raw material, and the application of the pseudocapacitance capacitor in the field of energy storage can be promoted.

A capacitor and supercapacitor design are based on metal-foam electrodes. An electrolytic capacitor has a metal foam dielectric (e.g., aluminum oxide, titanium oxide, iron oxide, or others). An electric double-layer supercapacitor has an electrode with metal foam (e.g., copper, nickel, titanium, iron, steel alloy, or aluminum) filled with activated carbon, or graphene, or metal foam with activated carbon foam, or any combination of these to enhance the electrical conductivity and thus the power and capacity of the cell. A pseudocapacitor device has an electrode with metal foam (e.g., iron, cobalt, nickel, copper, titanium, aluminum, magnesium, tin, manganese, and stainless steel, and their alloy foams) coated with an oxide-or hydroxide-based material containing highly active zones. The pseudocapacitor metal-foam electrode can also be filled with activated carbon in the form of a slurry to further enhance its capacity.

The present application relates to a 48V mild hybrid system and its control method, which includes: a 48V electrical system, which includes a 48V motor, a 48V electric heating device, and a 48V air conditioner connected to a 48V pseudocapacitor; a 24V electrical system, which includes a 24V lead-acid battery and a vehicle-wide 24V electrical load connected to each other; a DC / DC converter, which connects the 48V electrical system and the 24V electrical system. Compared with a battery, a capacitor has the advantages of low price, small mass and small volume, which is convenient for layout, and does not require cooling. Moreover, in combination with the control method of the 48V mild hybrid system, it can ensure that the power of the 48V pseudocapacitor can meet the energy required for driving assistance, exhaust gas heating, and starting, enabling the vehicle to be stably and normally used. By maintaining the normal operation of driving assistance, energy recovery, and starting, the fuel consumption of the vehicle is ultimately reduced.

The invention discloses a nitrogen-doped porous carbon material for a supercapacitor and a preparation method and application thereof, and belongs to the technical field of supercapacitors, and the method comprises the following steps: mixing and grinding a carbon source, a nitrogen source and an activator, carrying out a one-step carbonization reaction in an inert atmosphere, washing to be neutral, and drying to obtain the nitrogen-doped porous carbon material for the supercapacitor. The activating agent and the nitrogen source act synchronously, a decomposition product of the activating agent etches a carbon skeleton to form pores during carbonization, a decomposition product of the nitrogen source is accurately doped to a carbon defect site, and it is guaranteed that high specific surface area and efficient doping are achieved synergistically. The activating agent is mild in decomposition activity, the etching rate is matched with the carbon source carbonization rate, a hierarchical pore structure is formed, and electrolyte transmission and charge storage are facilitated; the nitrogen doping is mainly based on high-activity pyridine nitrogen and pyrrole nitrogen, a pseudocapacitor is introduced, and the electrochemical activity is high. The activating agent is stable and non-corrosive at normal temperature, decomposition products are easy to wash and remove, energy consumption and pollution are low, raw material reaction efficiency is high, excessive addition is not needed, cost is low, and large-scale application is easy.

The present invention belongs to the technical field of electrode materials and heavy metal wastewater treatment, and discloses a WS2 pseudocapacitor interface material, its preparation method and application. The preparation method comprises the following steps: uniformly dispersing sodium tungstate, thiourea, hydroxylamine hydrochloride and a surfactant in deionized water to obtain a mixed solution; heating the mixed solution to 160-200°C for hydrothermal reaction, separating, washing and drying the reaction product to obtain a WS2 pseudocapacitor interface material. The preparation method of the present invention is simple, the reaction conditions are mild and the cost is low. The obtained WS2 pseudocapacitor interface material can be used for capacitor adsorption to remove heavy metal ions, and has a great effect on Cr 3+ 、Cd 2+ , Pb 2+ 、Ni 2+ 、Co 2+ 、Cu 2+ The removal efficiency of heavy metal ions can reach over 90%. Compared with conventional methods, it has the advantages of high energy efficiency, environmental friendliness and no pollution.

The invention relates to the field of inorganic materials, in particular to a preparation method and application of antimony trioxide, an emulsifier, a water phase and mineral oil are mixed to obtain W / O emulsion, after the W / O emulsion is irradiated by ultraviolet light, an alcohol phase containing an organic antimony precursor is added, after stirring reaction, standing, centrifugation, sediment collection, washing and calcination are performed, and the antimony trioxide is obtained. The antimony trioxide prepared by the method provided by the invention has a special hollow porous microstructure structure, and is a very potential pseudocapacitor electrode material.

The invention discloses a sandwich structure composite material, a preparation method and application thereof and a supercapacitor, and relates to the technical field of electrode materials, the sandwich structure composite material comprises a first LIPG layer, an LIPG and pseudocapacitance material composite layer and a second LIPG layer, and the LIPG and pseudocapacitance material composite layer is arranged between the first LIPG layer and the second LIPG layer; according to the invention, the LIPG and the pseudocapacitance material are combined, and the obtained composite electrode material can be applied to a supercapacitor through the sandwich structure design, so that the electrochemical performance is improved, and the service life of the electrode is prolonged.

This invention relates to the field of inorganic materials, specifically to a method for preparing low-lead antimony trioxide. The method involves crushing antimony ingots, first melting and oxidizing them, then distilling to remove impurities to obtain a refined product. The refined product, organic acid, and polyol are mixed, heated, and reacted, followed by filtration to remove insoluble matter, yielding an antimony complex solution. A long-chain organic amine is dissolved in a mixed solvent of anhydrous ethanol and deionized water to obtain a long-chain organic amine solution. The antimony complex solution is added to the long-chain organic amine solution, and the pH is adjusted to 6-7. The reaction solution is transferred to a hydrothermal reactor, sealed, and subjected to hydrothermal reaction. The precipitate is collected, washed, and dried. The resulting nanosheet-like clustered antimony trioxide exhibits high purity, low impurity content, extremely high specific surface area, abundant active sites, high energy density, and good cycle performance, making it a highly promising pseudocapacitor electrode material.

A capacitor and supercapacitor design are based on metal-foam electrodes. An electrolytic capacitor has a metal foam dielectric (e.g., aluminum oxide, titanium oxide, iron oxide, or others). An electric double-layer supercapacitor has an electrode with metal foam (e.g., copper, nickel, titanium, iron, steel alloy, or aluminum) filled with activated carbon, or graphene, or metal foam with activated carbon foam, or any combination of these to enhance the electrical conductivity and thus the power and capacity of the cell. A pseudocapacitor device has an electrode with metal foam (e.g., iron, cobalt, nickel, copper, titanium, aluminum, magnesium, tin, manganese, and stainless steel, and their alloy foams) coated with an oxide- or hydroxide-based material containing highly active zones. The pseudocapacitor metal-foam electrode can also be filled with activated carbon in the form of a slurry to further enhance its capacity.

The present invention discloses a multi-mode switchable supercapacitor, comprising: a high-energy-density pseudocapacitor supercapacitor, the high-energy-density pseudocapacitor supercapacitor comprising a first electrode plate, a second electrode plate, and a third electrode plate; and a high-power-density double-layer supercapacitor, the high-power-density double-layer supercapacitor comprising the second electrode plate and the third electrode plate; the high-power-density double-layer supercapacitor and the high-energy-density pseudocapacitor supercapacitor being switchable. The multi-mode switchable supercapacitor of the present invention integrates a high-power-density double-layer capacitor and a high-energy-density pseudocapacitor into one capacitor, and switches between a high-power-density double-layer capacitor mode and a high-energy-density pseudocapacitor mode by switching between a sandwich-structured supercapacitor and an interdigitated supercapacitor.

A method of manufacturing a carbon nanostructure, such as a carbon foam material, is disclosed. The method comprises the steps of: (a) using a first laser beam to irradiate an encapsulated or sub-surface region of a carbon pre-cursor material below a surface of the material, to create carbon foam in that sub-surface region, and a disorganised, amorphous non-graphene material above the carbon foam, and then (b) using a second laser beam to remove or ablate the disorganised, amorphous non-graphene material sitting above the carbon foam, to expose at least some of the carbon foam. The resultant carbon foam material shows a significant D peak; the 2D peak is significantly less than the G peak; and the peak D: peak G ratio is significantly above zero. In appearance and Raman signature, it appears similar to a carbon nano-onion material. It can be used in biosensors, supercapacitors and pseudo-capacitors.

A method of manufacturing a highly activated, highly porous, highly conductive networked monolithic electrode for an electrical energy storage device, including a supercapacitor, pseudocapacitor, battery, or for an electrical power generation device, such as a fuel-cell, or for a gas production device, such as a hydrogen gas generator or an oxygen gas generator.

The invention provides a preparation method and application of a quinone compound / graphene composite electrode material for 3D printing, and the method comprises the steps: adding a quinone compound into a graphene oxide dispersion liquid, and carrying out the ultrasonic treatment, thereby obtaining the quinone compound modified graphene oxide dispersion liquid; the composite material is prepared under high-temperature and high-pressure conditions by adopting a hydrothermal method; the prepared composite electrode material has the advantages of high capacity, long cycle life and rapid reaction kinetics, and can be used as a low-temperature-resistant all-organic photon pseudocapacitor negative electrode. According to the 3D printing three-dimensional architecture high-quality load thick electrode, high-quality load is achieved, meanwhile, due to introduction of a porous structure, an electrolyte can fully infiltrate an electrode active material, and through unique structural design (such as vertical pore channel design), the electrode tortuosity can be reduced to the maximum extent; the ion / electron transmission distance can be greatly shortened while the high load is met, and the method can be used for preparing the 3D printing all-organic photon pseudocapacitor with high energy density and power density.

An apparatus for performing direction control and separation on particles in an electrolyte. The apparatus comprises: a microfluidic channel (1), wherein the microfluidic channel (1) has a sample inlet (11) and a sample outlet (12), such that a fluid flows at a velocity V0 through the sample inlet (11) toward the sample outlet (12), a separation chamber is formed inside the microfluidic channel (1), and the fluid contains charged particles, which are separated inside the separation chamber; two or more groups of electrodes (2), wherein the number of electrodes in each group of electrodes (2) is the same or different, each electrode (2) is in contact with the fluid and forms a pseudocapacitor and / or a double-layer capacitor on the interface where the electrode (2) is in contact with the fluid, the electrodes (2) are arranged in parallel inside the microfluidic channel (1), and there may be a certain angle between the arrangement direction of the electrodes (2) and the flowing direction of the fluid; a plurality of conductor leads (3); and two or more driving power sources (4), wherein each driving power source (4) is connected to one group of electrodes (2), the driving power sources (4) generate periodic voltages or current excitations, and voltage excitations or current excitations output by the driving power sources (4) within one output period are in a changing state.

The invention relates to the field of electrochemical energy storage, in particular to a ruthenium dioxide-cellulose nanofiber composite self-supporting electrode material, a preparation method of the ruthenium dioxide-cellulose nanofiber composite self-supporting electrode material and a pseudocapacitor. The invention provides a ruthenium dioxide-cellulose nanofiber composite self-supporting electrode material. The preparation method comprises the following steps: growing ruthenium nanoparticles which are uniformly distributed and have the particle size of 1-3nm on surface-modified cellulose nanofibers in situ, carrying out vacuum filtration and drying to form a self-supporting three-dimensional network structure, and carrying out low-temperature annealing to oxidize the ruthenium nanoparticles. According to the preparation method, the problems that ruthenium dioxide particles are prone to agglomeration and falling off in current industrial preparation can be solved, the prepared electrode material has good flexibility and extremely low self weight, and meanwhile excellent specific capacitance can be guaranteed.

The invention relates to the field of inorganic materials, in particular to antimony trioxide and a preparation method thereof.The antimony-containing waste residues are washed with water and then dried to obtain prefabricated powder, the prefabricated powder and hydrochloric acid are mixed to react and then filtered, filtrate is collected and diluted with water to be hydrolyzed, generated solids are filtered out and washed and then dissolved with hydrochloric acid, and a refined solution is obtained; adding the refined solution into an EDTA (Ethylene Diamine Tetraacetic Acid) solution, then adding a dispersing agent, maintaining the pH value of the system to be 3-5 by using ammonia water during the period, continuously stirring, carrying out water bath evaporation to obtain colloid, and calcining, washing, drying and grinding the colloid to obtain the antimony trioxide. Therefore, the material becomes a very potential pseudocapacitor electrode material.

The present invention provides a method for forming a porous titanium electrode with a high aspect ratio for a micro-supercapacitor, comprising: a photolithography step, i.e., forming a first photoresist layer and a second photoresist layer that are mutually adhered on a substrate by photolithography, wherein the cross-sectional area of ​​the first photoresist layer is smaller than the cross-sectional area of ​​the second photoresist layer in a direction parallel to the substrate; a sputtering step, i.e., performing physical vapor deposition on a titanium-based alloy to form a titanium-based alloy electrode; and an etching step, i.e., using an etchant to selectively etch the titanium-based alloy electrode to remove other elements in the titanium-based alloy electrode except titanium to form a porous titanium electrode with a high aspect ratio. The method can realize a porous titanium electrode with a high aspect ratio for a micro-supercapacitor and its patterning, thereby improving the capacitance density and frequency performance of the micro-supercapacitor, and at the same time providing a considerable growth point for subsequent possible pseudocapacitor modification materials. The method has low cost and has the potential for large-scale production.

The invention belongs to the technical field of supercapacitors, and discloses a polypyrrole flexible composite electrode based on gold nanoparticles and carboxylated carbon nanotubes and a preparation method and application thereof. A carboxylated carbon nanotube / polypyrrole composite material is prepared from carboxylated carbon nanotubes and polypyrrole, a ternary synergistic system is constructed by introducing AuNPs, CNTs-COOH and PPy, a CC / AuNPs / CNTs-COOH-PPy flexible composite electrode is prepared, and a flexible supercapacitor is developed based on the CC / AuNPs / CNTs-COOH-PPy flexible composite electrode. According to the preparation method, efficient coupling of the EDLC and the pseudocapacitor is achieved, the finally constructed three-dimensional interpenetrating conductive network greatly improves the electron transmission efficiency, the process controllability is high, the electrochemical performance of the obtained material is excellent, a new thought and technology are provided for developing a high-performance flexible supercapacitor, and the preparation method has important application prospects.

The present disclosure provides organic compounds having pseudocapacitive performance and methods of preparing said compounds. The organic compounds can include perylene diamine (PDI) subunits and hexaazatrinaphthylene (HATN) subunits.

The invention relates to the technical field of capacitor energy storage, and particularly discloses a super capacitor energy storage system with high energy density, which comprises a super capacitor, the super capacitor adopts a double-layer capacitor and pseudocapacitor composite energy storage mechanism, and an electrode material of the super capacitor is switched between a double-layer capacitor reaction and a pseudocapacitor reaction; the charging and discharging control module is used for adjusting the current and the voltage of the super capacitor through the embedded controller and carrying out energy management; the energy management is combined with an MPPT algorithm and a DPC algorithm to carry out charging and discharging management; and the heat dissipation module is used for carrying out heat dissipation on the super capacitor. According to the system, by adopting a double-layer capacitor and pseudocapacitor composite energy storage mechanism, the energy storage and release performance of the supercapacitor is remarkably improved, intelligent management of charging and discharging of the supercapacitor is achieved by combining MPPT and DPC algorithms, and the energy conversion efficiency is improved; the heat dissipation module prevents the super capacitor from being overheated due to high-power discharge, and guarantees long-term stable operation of the system.

The invention belongs to the field of supercapacitors, and discloses a graphene pseudocapacitor electrode material based on expansion-oxidation strategy modification and a preparation method and application thereof, and the preparation method comprises the steps: carrying out the flame heating of a graphene oxide film under a normal pressure condition, inducing the expansion and reduction reaction of the graphene oxide film, and obtaining expanded graphene; adding the expanded graphene into a mixed acid solution, and stirring for oxidation reaction to obtain expanded-oxidized graphene; mixing the expanded-oxidized graphene, the electrically exfoliated graphene and bacterial cellulose, and performing vacuum-assisted suction filtration treatment to obtain a graphene pseudocapacitor electrode material modified based on an expanded-oxidized strategy; according to the preparation method, physical expansion and chemical oxidation are combined to prepare expanded-oxidized graphene, so that the electron conduction capability and the ion migration rate of the electrode material are synergistically improved, and the graphene pseudocapacitance electrode material with flexibility, high specific surface area, abundant pseudocapacitance active sites and stable double-electrode-layer capacitance characteristics is prepared.