74 results about "Nickel electrode" patented technology

The invention belongs to the technical field of nickel electrode slurry preparation, discloses a preparation process of ultra-fine particle size roll-printed nickel electrode slurry for an ultra-high capacity MLCC, and aims to solve the problems that in the prior art, ultra-fine nickel powder is easy to oxidize, the cost of covering nickel nitride powder is high, a covering layer is easy to damage and agglomerate during dispersion, and the performance of the slurry is poor. The method comprises three steps of raw material pretreatment, synchronization of material dispersion and nitridation, post-treatment and nitrogen protection, wherein the pretreatment is used for removing impurities and preventing oxidation, dispersion and nitridation are carried out synergistically through a sand mill and an ultrahigh-pressure homogenizer in a graded regulation and control mode, the post-treatment comprises filtering, inspection and double-layer vacuum packaging, the raw materials are prepared according to a specific proportion, key parameters are precisely regulated and controlled, and finally the slurry is prepared. Roll printing adaptability and co-firing requirements are met, independent nitridation and reduction procedures are omitted, cost is reduced, slurry uniformity, dispersion stability and MLCC reliability are improved, and large-scale mass production can be achieved.

The invention relates to a preparation method of a nickel-chromium-iron alloy consumable electrode, the consumable electrode and an alloy ingot. The method comprises the steps that an electrolytic nickel plate is subjected to vacuum melting under the condition that the vacuum degree is smaller than or equal to 0.67 Pa, after the electrolytic nickel plate is melted down, the vacuum degree is kept to be smaller than 2 Pa and lasts for 5 min to 10 min, and a nickel melt with the lead removal rate larger than or equal to 60% is obtained; pouring the nickel melt into a pure nickel electrode under a vacuum condition; combining the pure nickel electrode with industrial pure iron to form an iron-nickel composite electrode; with the iron-nickel composite electrode as a consumable electrode, ferrochrome is added into a lined electroslag furnace for smelting, and a high-temperature metal melt is obtained; the high-temperature metal melt is tapped to a steel ladle, and argon is blown to the bottom of the high-temperature metal melt in the steel ladle for 3-5 min; and the high-temperature metal melt obtained after bottom argon blowing is poured into the consumable electrode. According to the method, five types of fusible elements including Pb, Bi, Sn, As and Sb are systematically and gradually reduced to be extremely trace by coupling three steps of vacuum volatilization, deep electroslag separation and secondary ladle refining.

Provided is a preparation process for 10T large single weight wide nickel coil, based on a vacuum consumable arc furnace, a secondary melting method is used for melting the prepared large single weight nickel electrode, and the technical parameters during melting are optimized and improved, solving the problems of large single weight nickel coil preparation difficulty, easy to produce pores, inclusions and deep shrinkage holes under the traditional preparation process, the preparation process is simple, the cost is low, the quality and yield of the nickel ingot after melting are improved, so that the quality of the nickel coil is guaranteed, and the preparation of large single weight high quality wide nickel coil products is especially suitable.

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.

The invention provides a nickel electrode with a multi-level structure and a preparation method thereof. The preparation method mainly comprises the following steps: preparing a bottom-layer concave-convex substrate structure by mixed acid dipping, and forming a middle layer and a catalyst layer structure by surface heterogeneous growth. According to the method, tight combination of the catalyst layer and the substrate is taken as a guide, the uneven nickel metal substrate is obtained through mixed acid etching aiming at the problem that the catalyst is prone to falling off, and a highly rough surface is provided for in-situ growth of a subsequent columnar middle layer. The nickel metal substrate and the nanoflower layer catalyst are connected through the middle layer, the binding force of the catalyst and the substrate is effectively increased, the catalyst is prevented from falling off, and industrial stable water electrolysis is achieved. The surface of the synthesized nickel electrode with the multi-level structure has excellent performance stability, the overpotential is only increased by 8 mV when the nickel electrode runs for 1000 hours under the current density of 500 mA cm <-2 >, and only 1.83 V is needed when the nickel electrode is in an electrolytic bath.

Provided is a method for producing fluorine gas that does not readily generate mist. The fluorine gas is produced by a method provided with an electrolysis step in which the fluorine gas is generated by electrolyzing an electrolyte solution using an anode and a cathode in an electrolytic cell. And the electrolyte contains hydrogen fluoride, metal fluoride and hexafluoronickel (IV) acid metal salt. The anode is a nickel electrode or a carbonaceous electrode, and the cathode is a metal electrode.

The application provides a high-porosity Raney nickel electrode and a preparation method thereof, and relates to the technical field of Raney nickel electrodes and preparation thereof. The preparation method of the high-porosity Raney nickel electrode effectively controls the dealuminization rate and the pore uniformity through a preparation process of'sintering treatment + special electrochemical dealloying treatment', and stably prepares the high-porosity Raney nickel electrode. A new process for preparing the high-porosity Raney nickel electrode in an environmentally friendly manner is provided, which replaces the traditional corrosion pore-forming process of a strong alkaline chemical solution and reduces pollution. The prepared high-porosity Raney nickel electrode has a high porosity of up to 52%, and the pore structure is stable, so that the catalytic activity and mechanical stability of the electrode are effectively improved.

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.

Provided is a device for producing an electrolyte solution for fluorine gas production having a low vapor pressure of hydrogen fluoride gas. An electrolyte solution production device (1) is provided with: an anode (3) having a nickel electrode (31) and a carbon electrode (32); a cathode having a metal electrode; and an electrolyte solution production tank (2) capable of accommodating a liquid to be treated (8) containing potassium fluoride and hydrogen fluoride and performing electrolytic treatment of the liquid to be treated (8) using the anode (3) and the cathode (4). The electrolyte solution production device (1) has a configuration capable of applying a direct current to both the nickel electrode (31) and the carbon electrode (32).

The application provides a hollow thorn ball-like phosphorus-doped cobalt nonanethiolate / nickel foam electrode material and a preparation method thereof, and belongs to the technical field of supercapacitor electrode material preparation. The preparation method is as follows: taking nickel foam (NF) as a current collector, pretreating the NF, preparing a Co(OH)F-NF precursor through hydration, preparing Co9S8-NF through sulfuration, and finally preparing the hollow thorn ball-like P-Co9S8-NF electrode material through phosphorus doping. The preparation process is simple, easy to realize, and low in preparation cost, and can lay a technical support for the preparation of supercapacitor high-conductivity, high-structural-stability and high-energy-storage electrode materials, and has good application value and prospect in the field of supercapacitor electrode materials.

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 cluster type self-healing nickel oxyhydroxide / iron-nickel electrode and application thereof in hydrogen production by cracking of saline water, and steps are as follows: under a three-electrode system, a foam metal is used as a working electrode, a cyclic voltammetry method is adopted in a potassium hydroxide solution electrolyte, and a metal cluster dispersion liquid is obtained; under the three-electrode system, a nickel iron / nickel MOF is used as the working electrode, the metal cluster dispersion liquid is used as the electrolyte, the cyclic voltammetry method is adopted, and a target electrode is obtained; and the target electrode is used in hydrogen production by cracking of saline water or a whole reaction of cracking of saline water in the electrolyte obtained by mixing the metal cluster dispersion liquid and the saline water. The target electrode has higher activity and durability and good self-healing performance under the saline water and industrial large current density (500 mA cm ‑2 ).

The invention belongs to the technical field of hydrogen preparation by electrolyzing water, and particularly relates to a CoOOH-FeOOH composite electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: loading CoO on a FeOOH / foamed nickel electrode to obtain a CoO-FeOOH / foamed nickel electrode; taking the CoO-FeOOH / foamed nickel electrode as a working electrode, forming a three-electrode system together with a reference electrode and a counter electrode, immersing one end of the three-electrode system into an alkaline electrolyte, and performing electrochemical activation to obtain a CoOOH-FeOOH composite electrode; according to the invention, CoOOH and FeOOH are compounded, so that the technical defects of cobalt oxide and iron oxyhydroxide are overcome; when the hydrogen production device is applied to hydrogen production by electrolyzing alkaline water, high-efficiency, stable and low-cost hydrogen production by electrolyzing water under the alkaline condition is realized.

The application discloses a Ni / NiO ohmic contact improvement method based on supercritical fluid technology, which comprises the following steps: depositing a NiO layer on a substrate material, then depositing a metal nickel electrode on the surface of the NiO layer, carrying out annealing treatment on the substrate material, obtaining an ohmic contact, and finally carrying out supercritical reaction on the substrate material, so as to realize the ohmic contact improvement of the substrate material. The method solves the problems of large Ni / NiO ohmic contact resistivity and poor ohmic contact characteristics caused by the existing thermal annealing technology.

The application discloses a method for preparing a platinum monatomic loaded electrode by electrodeposition and the electrode. First, anodic etching is performed on the foamed nickel in an electrolyte solution, and the etched foamed nickel is cleaned with alkali. Then, the etched foamed nickel is placed in a solution containing nickel and iron ion precursors to grow a NiFe LDH film. The foamed nickel electrode loaded with the NiFe LDH is subjected to cathodic deposition in an alkaline solution containing chloroplatinic acid root to prepare a NiFe LDH electrode loaded with platinum monatomic (Pt SAs). The method can quickly prepare the NiFe LDH catalyst uniformly loaded with platinum monatomic at room temperature by means of the cathodic reduction method. The NiFe LDH loaded with the Pt SAs has a special coordination structure, which enhances the activity of the composite material in the electrocatalytic hydrogen evolution and oxygen evolution reactions. The preparation method can be expected to introduce platinum monatomic into various LDH electrodes and further enhance the electrocatalytic activity of the electrodes.

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 double-layer Raney nickel electrode, a preparation method and application. 3+ The preparation method of the double-layer Raney nickel electrode comprises the following steps: providing a conductive base material; immersing the conductive base material in a solution containing Fe ions to perform a surface uniform etching reaction, so as to obtain an iron modified conductive base material; loading a Raney nickel type alloy powder on the iron modified conductive base material, so as to obtain a composite conductive base material; immersing the composite conductive base material in an alkaline solution to perform an activation reaction, so as to obtain the double-layer Raney nickel electrode. The double-layer Raney nickel electrode prepared by the application has high stability and high catalytic activity, has a good effect in electrolysis of water to generate hydrogen, and has high generation efficiency. Moreover, the preparation method of the application is simple, convenient to operate, and suitable for industrial production.

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.

The application discloses a kind of vanadium doped nickel phosphide material of spherical micrometer flower structure and its preparation method and application, belong to electrolytic water hydrogen production material technical field.Method includes the following steps: (1) foam nickel is ultrasonically cleaned, dry;(2) deionized water, isopropanol, urea, NH4F, VCl3, Ni (NO3) 2·6H2O and the foam nickel treated in step (1) are placed in reaction vessel, heated reaction using hydrothermal method, obtain nickel vanadium oxide grown on foam nickel matrix;(3) nickel vanadium oxide obtained in step (2) and sodium hypophosphite are respectively loaded into porcelain boat, calcine in inert gas atmosphere, obtain vanadium doped nickel phosphide material of spherical micrometer flower structure.Afficient: the vanadium doped nickel phosphide material prepared in the application, according to electrochemical test results, vanadium doped nickel phosphide electrode of spherical micrometer flower structure shows excellent electrocatalytic performance, when current density is 10mA·cm ‑2 , overpotential is only 85mV;It has broad application prospect.

The invention relates to a bifunctional catalyst electrode, a preparation method of the bifunctional catalyst electrode and application of the bifunctional catalyst electrode to continuous electrolysis, and belongs to the technical field of preparation of electro-catalysis nano materials. And then the metal organic framework material is reconstructed through electrochemical activation treatment to obtain the bifunctional catalyst electrode which can be applied to UOR and OER at the same time, and the electrode can realize electrolysis of UOR and OER with relatively low potential, so that energy consumption is reduced. The CO3 < 2->-modified Co-doped NiOOH is obtained on the surface of the foamed nickel electrode through an electrochemical activation method and is applied to urea pollution purification through electro-catalysis urea oxidation and the subsequent water electrolysis process, and finally the continuous hydrogen production process is achieved.

The invention relates to a method for co-producing formate through cathode and anode coupling by using a bismuth-based electrode synthesized by one-step galvanic couple replacement, and belongs to the field of electrochemical materials. According to the method, a bismuth / foamy copper electrode and a bismuth / foamed nickel electrode are respectively prepared on a foamy copper substrate and a foamed nickel substrate through a one-step galvanic couple replacement reaction, and are respectively used as a cathode and an anode to synergistically realize carbon dioxide reduction and methanol oxidation reaction and co-production of formate. According to the electrode preparation process, efficient electrode materials can be constructed on different substrates only through one-step reaction, and good expansibility is achieved. The whole process is simple and efficient, complex equipment or subsequent treatment is not needed, and the obtained electrode material is uniform in morphology and rich in active sites. In a coupled electrolysis system, the electrode catalyzes reduction of carbon dioxide at the cathode to generate formate, meanwhile, the formate is co-produced at the anode through methanol oxidation, the system shows formate Faraday efficiency higher than 180% and can stably run for more than 50 hours, and efficient collaborative production of formate at the two ends of the cathode and the anode is achieved.

The invention provides a boron-doped Raney nickel electrode, a preparation method and application. The preparation method of the boron-doped Raney nickel electrode comprises the following steps: sequentially carrying out first electrochemical treatment and second electrochemical treatment on a Raney nickel electrode to obtain the boron-doped Raney nickel electrode, the first electrochemical treatment comprises the following steps: taking the Raney nickel electrode as a cathode, and carrying out electrochemical reaction in an alkaline solution; the second electrochemical treatment comprises the following steps: after the first electrochemical treatment is completed, adding a boron source into the alkaline solution, and continuously carrying out electrochemical reaction. The boron-doped Raney nickel electrode prepared by the invention has good chemical stability and long service life in a strong alkali environment; moreover, the method is simple in process and convenient to operate, reduces the production cost, improves the production efficiency, and is suitable for an industrial electrolytic cell production line.

The present disclosure relates to the technical field of electrode materials and provides a titanium-based platinum-nickel electrode material, a preparation method, and an application thereof. The method includes: performing a first anodic oxidation and a second anodic oxidation sequentially on a titanium sheet in an ammonium fluoride solution to obtain an oxidized titanium sheet; performing calcination on the oxidized titanium sheet to obtain a titanium sheet containing a titanium dioxide layer; and performing electrodeposition on the titanium sheet containing the titanium dioxide layer in a platinum-based electrolyte to obtain the titanium-based platinum-nickel electrode material. The prepared titanium-based platinum-nickel electrode material effectively reduces the usage amount of Pt-based precious metals and can maintain high activity and stability to generate hydrogen peroxide on-line under the neutral condition; its cathode current density efficiency reaches 76.40%, the anode current density efficiency reaches 70.23%, and the bilayer capacitance value is 1.33 mF·cm−2, which is 4.2 times the bilayer capacitance value of the titanium-based platinum-nickel electrode material obtained without anodic oxidation, and has a very good industrial application prospect.

The utility model discloses waste nickel electrode net recycling and forming equipment which comprises a main bin chamber, an upper cover plate, a main pressing plate, a side pressing plate and a bin outlet plate, and the main bin chamber is connected with a cover plate oil cylinder, a main pushing oil cylinder, a side pushing oil cylinder and a bag outlet oil cylinder. The upper cover plate is rotationally connected to the main chamber, and the cover plate oil cylinder is in driving connection to the upper cover plate; the main pressing plate is located in the main bin, and the main pushing oil cylinder is in driving connection with the main pressing plate. The side pressing plate is connected to the power output end of the side pushing oil cylinder, and the side pushing oil cylinder drives the side pressing plate to be contained in the inner wall of the main bin chamber or move into the main bin chamber. One end of the delivery plate is rotationally connected to the side wall of the main chamber, and the other end of the delivery plate is accommodated in the bottom wall of the main chamber; the cover plate oil cylinder, the main pushing oil cylinder, the side pushing oil cylinder and the bag discharging oil cylinder are connected to the multi-way control valve through pipelines. Compared with the prior art, the device has a simple structure, is convenient to use, can press and shape the wire and net-shaped waste nickel electrode net recycled materials into blocks, and solves the problem that the loose wire and net-shaped recycled materials are difficult to load into smelting equipment.

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.

The invention discloses a novel electro-deposition nickel sulfide electrode and application of the novel electro-deposition nickel sulfide electrode as an alkaline electrolysis water electrode. The novel nickel particle modified electrode is an inorganic material. The excellent electrochemical performance of the novel electro-deposition nickel sulfide electrode shows that the novel electro-deposition nickel sulfide electrode has a very large application prospect as an alkaline electrolysis water electrode. Meanwhile, the novel electrodeposition nickel sulfide electrode preparation process is simple and controllable, equipment is simple, and the method is easy for large-scale production.

The invention relates to a preparation method of a low-cost carbonate / Ni rod-shaped composite electrolytic water hydrogen production electrode, and aims to solve the problems of complex process, high cost of rare earth oxide or transition metal oxide serving as a second phase material and the like in the conventional nickel electrode improvement method. The preparation method comprises the following steps: 1, mixing and grinding nickel oxide powder and carbonate powder to obtain mixed powder, and carrying out compression molding on the mixed powder to obtain a raw material block; 2, carrying out high-temperature sintering on the raw material block at the temperature of 800-1100 DEG C in an air atmosphere; and 3, heating the sintered product to 400-700 DEG C in the presence of inert gas, introducing hydrogen, and carrying out reduction treatment in a hydrogen atmosphere. The prepared composite electrode has excellent water electrolysis performance, a BaCO3 / Ni composite system of a rod-shaped structure can endow the electrode with efficient catalytic activity, the electrode has good hydrophilicity due to the strong water absorption characteristic of BaCO3, and the water electrolysis reaction dynamic characteristic is effectively improved.

A battery (2) is provided with a container (10) and an electrode group (6) that is housed together with an alkaline electrolyte (4) in the container (10), the electrode group (6) including a nickel electrode (14) as a positive electrode and a negative electrode (12) combined via a separator (8), the nickel electrode (14) being provided with a positive electrode core material and a positive electrode mixture filled in the positive electrode core material, the positive electrode mixture including nickel hydroxide as a positive electrode active material, the nickel hydroxide containing a sulfate, the weight ratio of the S component contained in the sulfate with respect to the Ni component in the nickel hydroxide being 0.28% or more and 1.50% or less.

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.