18 results about "Nickel electrode" patented technology

The present application relates to a kind of nickel-zinc iron ternary oxygen electrode and its preparation method and application, including the following steps: (a) on the conductive substrate, electrodepositing nickel-zinc pre-plating layer is plated;(b) the conductive substrate of the nickel-zinc pre-plating layer of plating is as anode, nickel electrode is as cathode, be placed in the hydroxide aqueous solution containing iron source, under the condition of 70-90 DEG C, anode potential 1.8V~2.2V electrochemical oxidation is carried out.The conductive substrate of the nickel-zinc pre-plating layer of plating is as anode, nickel electrode is as cathode to carry out electrochemical oxidation, so that the metal zinc in pre-plating layer can be anodically dissolved, and soluble zincate ion is generated, so that abundant pore and defect are formed in-situ in electrode interior;Iron ion in electrolyte occurs replacement reaction on dissolved zinc site or exposed nickel site, and is introduced into electrode skeleton;So that more stable, active, and substrate combined firmly Porous ternary nickel-zinc iron composite electrode is finally obtained.

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

The application belongs to the technical field of wastewater treatment, and particularly relates to a reduced graphene oxide modified foam nickel electrode for an electro-Fenton method, a preparation method and application, and the preparation method of the reduced graphene oxide modified foam nickel electrode for the electro-Fenton method, characterized by comprising the following steps: S1: pretreating a foam nickel sheet, ultrasonic cleaning, and obtaining the pretreated foam nickel sheet; S2: configuring an oxidized graphene solution, performing hydrothermal reaction on the foam nickel sheet obtained in S1 and the oxidized graphene solution, cleaning, freeze-drying, and obtaining the reduced graphene oxide modified foam nickel electrode. The preparation method of the reduced graphene oxide modified foam nickel electrode for the electro-Fenton method has the effect of improving the electro-Fenton efficiency, thereby promoting the degradation of oil and gas field wastewater.

Provided in the embodiments of the present application are a battery cell, a battery device, and an electric device. The battery cell comprises a housing, an electrode assembly, an electrolyte, and a positive terminal, wherein the housing comprises a first wall, a second wall, and a side wall; the first wall and the second wall are oppositely arranged on two sides of the side wall and enclose an accommodating cavity with the side wall; the material of the first wall comprises iron, chromium, or nickel; the electrode assembly is arranged in the accommodating cavity; the electrolyte is accommodated in the accommodating cavity and infiltrates at least part of the electrode assembly; the positive terminal is arranged on the first wall, and the positive terminal is electrically connected to the electrode assembly; and the housing is provided with a liquid injection hole extending through the housing. The liquid injection hole is arranged on the first wall, and the minimum distance between the liquid injection hole and the positive terminal is not less than 20 mm; and / or the liquid injection hole is arranged on the second wall or the side wall.

The application discloses a perovskite solar cell and a preparation method and a battery assembly thereof. The perovskite solar cell comprises, in sequence, a transparent conductive substrate, a hole transport layer, a perovskite active layer, an interface modification layer, an electron transport layer, a buffer layer and a back electrode; wherein the back electrode is a nickel electrode. The application uses a nickel electrode as the back electrode of the perovskite solar cell, replaces the traditional metal electrode, has intrinsic chemical stability, suitable energy level matching, low cost and scalable preparation advantages, does not need to set a barrier layer, and is favorable to improving the stability of the perovskite solar cell.

The application provides a Raney nickel electrode and a preparation method and application thereof, and relates to the field of hydrogen production by electrolysis of water. An electrode substrate with a Raney nickel catalytic layer on the surface is subjected to heat treatment to obtain a heat-treated electrode; an alkali solution, an additive and the heat-treated electrode are mixed, activated, washed and dried to obtain the Raney nickel electrode; the volume concentration of oxygen in the heat treatment is gradually reduced until a low-oxygen atmosphere or an oxygen-free atmosphere, and the temperature is gradually increased. By introducing a controllable gradient heat treatment process before alkali activation, sufficient diffusion between Ni and Al is promoted to form a specific content stable Ni3Al phase, the Ni-Al synergistic structure in the Ni3Al phase can regulate the surface electronic structure to a certain extent, improve the distribution of active sites on the electrode surface, and improve the hydrogen evolution and oxygen evolution performance. In addition, while ensuring the integrity of the porous electrode skeleton structure, the alloying degree is improved.

A porous nickel electrode for improving the stability of alkaline water electrolysis, its preparation method, and its application are disclosed. This invention relates to the field of electrode material technology. The method involves heating a nickel mesh and zinc powder in a nitrogen atmosphere at 200-400 °C for 2-4 hours to obtain a nickel-zinc alloy material grown on the mesh. This material is then chemically etched in an alkaline solution to obtain a porous nickel electrode. The porous nickel electrode is then held in a reducing atmosphere at 200-700 °C for 2-4 hours to complete the preparation of the porous nickel electrode. This invention constructs a porous structure with interconnected pores through an alloying-dealloying process, which facilitates rapid hydrogen desorption during electrolysis, reduces bubble blockage, and improves mass transfer efficiency. Secondary heat treatment within a specific temperature range coarsens the porous ligaments, enhancing mechanical strength and structural stability, and preventing structural collapse or active layer detachment during long-term operation. The prepared electrode maintains high hydrogen evolution activity while exhibiting excellent electrochemical stability and mechanical durability, making it suitable for industrial alkaline water electrolysis.

This disclosure provides a method for preparing a puncture-resistant edge-sealing membrane, a method for preparing a nickel electrode, and a nickel-based battery. The method for preparing the puncture-resistant edge-sealing membrane includes the following steps: surface activation treatment of a polyolefin membrane substrate; mixing fiber reinforcing material, surface adhesive monomer, crosslinking agent, and photoinitiator in an ethanol solvent to obtain a coating liquid; coating the coating liquid onto the surface of the activated substrate to obtain a coating intermediate; and ultraviolet curing the coating intermediate to form a puncture-resistant coating to obtain the puncture-resistant edge-sealing membrane. The rigid network formed by the crosslinking of the surface adhesive monomer and the fiber reinforcing material improves mechanical strength and puncture resistance, eliminating the safety hazard of internal short circuits. The surface adhesive monomer, after ultraviolet curing, forms a grafted polymer that absorbs the electrolyte, and the resulting gel layer has ionic conductivity, allowing the coated portion to participate in the electrochemical reaction and reducing battery capacity loss.

The application provides a modified nickel oxide positive electrode material, and a preparation method thereof comprises the following steps: dissolving a nickel source, a chlorine source and an additive in deionized water, taking the precipitate after heating to a muffle furnace for calcination at 250-400 DEG C for 1-2 hours, and grinding to obtain modified nickel oxide particle material. The modified nickel oxide particle prepared by the application has small particle size, and the electrode sheet prepared by the application has good uniformity and low resistivity. The modified nickel oxide particle takes nickel oxide as the center, and the surface of the nickel oxide is adsorbed with chlorine ions. The modified nickel oxide particle can effectively improve the hole conductivity of the nickel oxide, thereby improving the conductivity of the nickel oxide electrode, and can also provide an electrochemical reaction raw material. Therefore, the energy density of the battery is high, and the battery is suitable for large-scale industrial application.

This invention discloses a method for dynamically inducing and controlling the electrolysis voltage in alkaline electrolysis for hydrogen production. This method is implemented through a control circuit and specifically includes: acquiring the input power of the alkaline electrolyzer and comparing it with a set power; if the input power is greater than or equal to the set power, controlling the control circuit to operate in conventional DC electrolysis mode; if the input power is less than the set power, controlling the control circuit to operate in dynamic induced electrolysis mode; in dynamic induced electrolysis mode, based on the input power and the electrochemical state of the alkaline electrolyzer, adaptively controlling the amplitude and frequency of the electrolysis current applied to the alkaline electrolyzer to suppress the corrosion of the nickel electrode by reverse current and extend the service life of the alkaline electrolyzer. This invention can achieve electrolysis voltage control solely by adjusting the electrolysis current without changing the electrode materials or the structure of the alkaline electrolyzer, without any additional lossy materials, and has good economic value and broad application prospects.

This disclosure provides systems, methods, and apparatus related to electrodes, specifically to electrodes for liquid alkaline water electrolyzers. In one aspect, a method includes providing a nickel electrode. A first heat treatment of the nickel electrode is at about 500° C. to 1000° C. in air to oxidize the nickel electrode. A second heat treatment of the nickel electrode is at about 500° C. to 900° C. in a reducing gas to reduce the oxidized nickel.

The application discloses a method for electrochemically upgrading and recycling waste nickel based on a eutectic solvent system, and belongs to the technical field of waste resource recycling and electrochemical catalytic material preparation. The method comprises the following steps: taking a material containing waste nickel as an anode, taking a carrier metal as a cathode, and taking a eutectic solvent as an electrolyte, wherein the electrolyte is dissolved with nickel salt and an additive; through electrodeposition, the nickel in the anode is dissolved out and deposited on the cathode, and the recycling of the waste nickel is completed. The electrochemical upgrading and recycling method based on the eutectic solvent system can efficiently utilize the waste material containing nickel (such as a thermal spraying Reni nickel electrode), and the waste material containing nickel can be used as the anode, so that the green recycling and high-value reuse of the waste nickel resource can be realized. The process is simple in operation, environmentally friendly, and high in resource utilization rate, and has strong industrial application potential and commercial value.

The application discloses a high-temperature-resistant and high-voltage-resistant lithium ion battery electrolyte and a preparation method thereof, and comprises the following components in percentage by mass: a film forming agent 1-4%, a flame retardant 1-3%, an electrolyte lithium salt 8-12%, an auxiliary lithium salt 1-2%, a high-voltage stable solvent 15-25%, and the balance being a base solvent. The application improves the cycle performance of the electrolyte by compounding fluorine-containing cyano-substituted benzene derivatives, silicon-oxygen compounds and nitrogen-containing borate esters as the film forming agent, and compounding the fluorine-containing cyclotriphosphazene flame retardant, so that the high-temperature stability and the high-voltage resistance of the electrolyte are enhanced through the synergistic effect, and the high-nickel electrode is compatible, the cycle life, the rate performance and the safety performance of the NCM811 battery are significantly improved.

The application discloses a rare earth metal cerium regulated nickel cobalt nitride foam nickel self-supporting bifunctional electrocatalytic electrode and a preparation method and application thereof. The method takes foam nickel as a self-supporting conductive substrate, mixes cobalt salt, nickel salt and cerium salt in an aqueous solution, and then performs in-situ hydrothermal reaction, so that cerium, nickel and cobalt precursors are uniformly grown on the surface of the foam nickel; then, urea is used as a nitrogen source to perform low-temperature nitriding treatment in a nitrogen atmosphere, and a cerium doped nickel cobalt nitride loaded foam nickel electrode is obtained. In a 1.0 mol / L KOH electrolyte, the oxygen evolution overpotential of the electrode is 238 mV at 10 mA / cm 2 2, and the hydrogen evolution overpotential is 80 mV; a symmetric full water splitting electrolytic cell assembled by simultaneously taking the electrode as a cathode and an anode has a voltage of 1.49 V at 50 mA / cm 2 2, and can be stably operated for 50 h. The method is simple in process, low in cost, does not need a polymer binder, and is suitable for efficient alkaline full water splitting for hydrogen production.

The application discloses a multi-stage purification treatment system for harmful gas in nickel electrode production and relates to the technical field of nickel electrode production. The system comprises a filtering device main body, an air inlet pipe and an air outlet pipe. The filtering device main body is internally provided with a first flow guide plate and a second flow guide plate. The first flow guide plate and the second flow guide plate are internally provided with two groups of first cooling pipes and two groups of second cooling pipes respectively. A cooling liquid circulating tank is arranged on one side of the filtering device main body. An outlet pipe is arranged on the outlet of the cooling liquid circulating tank. A plurality of first branch pipes are arranged on one end of the outlet pipe. The first flow guide plate, the second flow guide plate, the first cooling pipes and the second cooling pipes are arranged. The cooling liquid is introduced into the two groups of first cooling pipes and the two groups of second cooling pipes respectively. The temperature of the outer wall of the first flow guide plate and the second flow guide plate is reduced. The harmful gas is in contact with the outer wall of the first flow guide plate and the second flow guide plate. The temperature of the harmful gas is reduced. The plurality of filter bags are protected. The service life of the plurality of filter bags is prolonged.

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

This invention discloses an apparatus and method for the electrochemical oxidation of ammonia nitrogen wastewater for complete nitrogen removal. The apparatus includes an equalization tank, an electrolytic cell, and a water storage tank connected sequentially via a liquid delivery pipeline. The electrolytic cell contains an anode and a cathode, which are respectively connected to an external power source via wires. The anode comprises a conductive substrate and a bimetallic single-atom catalyst supported on the conductive substrate. The cathode is selected from one of the following: Pt electrode, Cu electrode, stainless steel electrode, graphite electrode, and nickel electrode. This invention utilizes the bimetallic single-atom catalyst supported on the anode to directly remove ammonia nitrogen from wastewater through electrochemical oxidation. This method effectively achieves complete nitrogen removal without the need for other auxiliary devices, converting ammonia nitrogen in wastewater into environmentally friendly nitrogen gas, thus achieving resource recovery and harmlessness.

This invention relates to the field of piezoelectric ceramics technology, and more particularly to a lead-free potassium sodium niobate-based piezoelectric ceramic and its preparation method. The piezoelectric ceramic is composed of alternating layers of p-type and n-type components, and its general chemical composition is: 0.94(Na...) 1‑y K y ) 1‑z Nb 1‑h Ta h O3-0.06A i B k O3+8%N. This invention constructs a stable, strong built-in field for sodium potassium niobate-based ceramics, exciting the material's domain response. This enables the reduction-resistant sodium potassium niobate-based lead-free piezoelectric ceramics to exhibit an ultra-high voltage strain coefficient under a low driving electric field, with an electrostrain coefficient far exceeding that of current mainstream lead-based piezoelectric materials. The fabrication process meets the requirements for multilayer devices co-fired with nickel electrodes. After fabrication into multilayer devices, it can effectively reduce the electrode cost of lead-free piezoelectric multilayer devices by more than 90%.