655 results about "Composite electrode" patented technology

The invention relates to a composite electrode material of an A-C core-shell structure, and belongs to the technical field of electrode materials. In the core-shell structure composite electrode material, A is any one element, two elements, three elements, four elements or five elements selected from Mn, Ni, Co, Fe, Cu, Zn, Ru, Pd and Rh; c is RE < x > Ce < 1-x > O < 2 >, and RE is any one element or two elements selected from La, Pr, Nd, Sm and Gd; x is the mole fraction of RE. By improving the interaction between the oxide and the core multi-component alloy and the synergistic effect between the elements, the structural stability and the carbon deposition resistance of the electrode material under the high-temperature condition are remarkably enhanced.

The invention belongs to the related technical field of flexible electrodes, and discloses a preparation method, a product and application of a high-temperature-resistant flexible metallized ceramic nanofiber composite electrode. The method comprises the following steps: carrying out electrostatic spinning on electrostatic spinning sol doped with an organic polymer to obtain a precursor of a flexible ceramic nanofiber membrane; carrying out primary high-temperature calcination on the precursor to remove the doped organic polymer so as to obtain a flexible ceramic nanofiber membrane; growing and coating a metal conductive layer on the surface of the flexible ceramic nanofiber membrane to obtain an electrode precursor; and carrying out secondary high-temperature calcination on the electrode precursor to obtain the required composite electrode. The invention also discloses a product obtained by the preparation method and application. According to the invention, the problem that the flexible sensor is not resistant to high temperature is solved.

The invention discloses a flexible pressure sensor based on ionized hydrogel and a preparation method thereof. The sensor adopts a sandwich layered structure of a flexible composite electrode, an ionized water gel dielectric layer and a flexible composite electrode, ionized water gel is used as a dielectric layer, and an upper flexible electrode and a lower flexible electrode are prepared from a multi-walled carbon nanotube / polydimethylsiloxane (MWCNTs / PDMS) composite material; the surface, making contact with the dielectric layer, of the electrode is copied through an abrasive paper template method to form a micron-sized rough structure. Under the action of external pressure, the effective contact area between the microstructure electrode and the ionized water gel dielectric layer and the equivalent electrode distance change, so that the interface electric double-layer capacitance is regulated and controlled, and high-sensitivity conversion from a pressure signal to a capacitance signal is realized. The flexible pressure sensor is simple in structure and excellent in flexibility, can be further integrated into a pressure sensing array, and is suitable for the fields of wearable electronics, electronic skin, man-machine interaction and the like.

The invention discloses an electrode health diagnosis method for a silicon-carbon negative electrode battery with a self-adaptive voltage range, and relates to the technical field of battery control, and the method comprises the steps: obtaining a quasi-static open-circuit voltage discharge curve according to a low-rate discharge test of the silicon-carbon negative electrode battery in an aging process, and measuring the total battery capacity; analyzing and extracting the silicon content in the battery; reconstructing a silicon-carbon composite electrode curve according to the silicon content, and performing inversion calculation of a voltage reconstruction model to obtain electrode parameters; the method comprises the following steps: acquiring charging fragment data of a silicon-carbon negative electrode battery in a circulation process, extracting charging time sequence characteristics based on equal interval voltage alignment and relaxation voltage characteristics after full charge according to the charging fragment data, and constructing a corresponding binary mask array; and constructing an estimation model, and performing supervised learning to obtain a trained estimation model for performing diagnosis of the electrode health parameters according to the charging fragment data, thereby effectively improving adaptability and accuracy during electrode health diagnosis.

The invention discloses a lignin-derived carbon fiber-based sodium metal battery negative electrode material which is prepared by the following steps: performing granulation and melt-blowing on lignin to obtain lignin fibers, performing pre-oxidation and carbonization treatment on the lignin fibers to obtain lignin-derived carbon fibers, soaking the lignin-derived carbon fibers in a silver nitrate saturated solution, taking out the lignin-derived carbon fibers, and drying to obtain the lignin-derived carbon fiber-based sodium metal battery negative electrode material. And carrying out flash burning treatment to obtain the silver nanoparticle / lignin derived carbon fiber composite material. The invention discloses a composite electrode plate for a sodium metal battery, which is prepared by the following steps: grinding a lignin-derived carbon fiber-based sodium metal battery negative electrode material into a short fiber shape, uniformly mixing with polyvinylidene fluoride and N-methyl pyrrolidone to prepare slurry, coating a negative current collector with the slurry, and cutting into pieces to obtain the lignin-derived carbon fiber-based composite electrode plate. The lignin-derived carbon fiber-based sodium metal battery negative electrode material has a three-dimensional interpenetrating network structure, has a high specific surface area, enables an electric field to be uniformly distributed, inhibits dendritic crystal growth, and is suitable for a sodium metal battery system.

The invention relates to a preparation method of a water electrolysis hydrogen production composite electrode based on a zwitterionic polymer binder. According to the method, a traditional ionic binder Nafion is replaced with a zwitterionic polymer polysulfobetaine methacrylate, an electrode-electrolyte interface is optimized through a unique electrically neutral hydration layer structure, the rapid desorption behavior of bubbles is enhanced, and efficient transmission of reaction ions is also promoted; and regulating and controlling the mass ratio of the PSBMA binder to the catalyst by using a spraying process. The invention aims to overcome the defects of high cost, insufficient mass transfer and poor interface stability of the existing Nafion binder, and provides the composite electrode taking PSBMA as the binder and the preparation method of the composite electrode, and the provided composite electrode is simple in preparation process and controllable in cost, and has good popularization and application prospects.

The invention discloses a rigid-flexible coupling all-solid-state battery suitable for a high-expansion electrode and a preparation method thereof.The all-solid-state battery comprises a composite positive electrode, an all-polymer electrolyte layer and a composite negative electrode which are sequentially assembled, and in-situ polymerization polymer electrolyte networks are constructed in the composite positive electrode and the composite negative electrode; the all-polymer electrolyte layer comprises a polymer electrolyte network constructed by in-situ polymerization, a lithium salt, a plasticizer and a fast ion conductor ceramic filler; polymer electrolyte networks in the composite positive electrode, the composite negative electrode and the all-polymer electrolyte layer are of a double-network structure consisting of a rigid polymer skeleton and a flexible cross-linked polymer network. Through the integrated structural design of the all-polymer electrolyte and the composite electrode, the ionic conductivity, the interface stability, the cycle performance and the safety performance are synergistically improved, and the requirements of high energy density and high-safety energy storage are met.

The embodiment of the invention provides a self-supporting integrated composite electrode and a preparation method thereof, and the self-supporting integrated composite electrode comprises a supporting layer which comprises a conductive carbon skeleton and a three-dimensional porous carbon network structure which is integrally molded with the conductive carbon skeleton; the active layers are uniformly distributed in internal pores of the three-dimensional porous carbon network structure and the surface of the conductive carbon skeleton; and a coating layer, wherein the coating layer covers the active layer and the three-dimensional porous carbon network structure. According to the self-supporting integrated composite electrode and the preparation method thereof provided by the embodiment of the invention, by constructing the self-supporting integrated composite electrode structure, the core problems of high internal resistance of a binder, weight increment of a current collector, interface stripping, complex preparation process and the like in a traditional electrode are effectively solved.

The invention discloses a wide-temperature-range solid insulation space charge measurement method, and belongs to the technical field of electrical insulation test and dielectric physical measurement. A solid insulation sample is mounted between double-layer composite electrode modules in a closed high-low temperature test cavity, and a flexible compensation gasket is adopted to absorb thermal expansion difference; a PID closed-loop control system is utilized to realize accurate and stable control of the temperature of the sample in a wide temperature range; applying a direct-current bias voltage and pulse voltage superposition signal, and collecting an acoustic signal generated by space charge displacement through a wide-temperature-range PVDF piezoelectric sensor module; and based on a sound velocity and sensitivity temperature calibration curve established by a pre-experiment, carrying out deconvolution processing on a sound wave signal to correct a temperature dependence error, and finally obtaining accurate space charge density distribution at different temperatures. According to the invention, the precision and reliability of space charge measurement of the solid insulating material in a wide temperature range are effectively improved.

The invention discloses a thin-film barium titanate electro-optical switch unit based on a composite electrode and an array thereof. The optical switch unit comprises a first waveguide optical fiber coupling module, a second waveguide optical fiber coupling module, an optical beam splitting module, an electro-optical phase shift region, an optical beam combining module, a third waveguide optical fiber coupling module and a fourth waveguide optical fiber coupling module. Wherein the composite electrode of the electro-optic phase shift region is composed of a metal electrode and a transparent conductive layer, the electrode is closer to the waveguide by utilizing the transparent characteristic of a transparent conductive material, the coupling of a light field and an electric field is effectively enhanced, and the extinction ratio is improved. Meanwhile, a barium titanate film with a high electro-optical coefficient is adopted as a waveguide material, and the performance is further optimized, so that the electro-optical switch unit has the excellent characteristics of low-voltage driving, high extinction ratio, low insertion loss and small size.

The application provides a composite electrode active layer, an electrode sheet and a secondary battery. The composite electrode active layer comprises an active material layer and a composite insulation layer which are stacked in sequence, the composite insulation layer comprises inorganic particles, a heat-resistant polymer and a heat-sensitive polymer; the weight ratio of the inorganic particles, the heat-resistant polymer and the heat-sensitive polymer is (50-100):(1-10):(5-50); the melting temperature of the heat-resistant polymer is 180-450 DEG C; and the softening temperature of the heat-sensitive polymer is 80-120 DEG C. Through the design of the composite electrode active layer, the application realizes the low closed pore temperature and the high film breaking temperature, and further realizes the porous structure and the high-temperature resistance.

The invention relates to the technical field of new energy material and electrochemical device manufacturing, and discloses a graphene-based functional nano-composite electrode preparation system based on AI parameter optimization, which integrates physical modules such as intelligent material supply, synthesis modification, slurry forming, post-treatment and the like with online characterization equipment into a whole. And closed-loop control is realized through the central AI optimization unit. And the central AI unit establishes a prediction model of process parameters and electrode performance by utilizing a deep neural network, reversely optimizes the process parameters according to performance requirements by adopting a multi-target optimization algorithm, and drives a system to iteratively execute a'preparation-test-optimization 'cycle until a high-performance electrode meeting a target is obtained. According to the method, automatic, accurate and efficient reverse design from performance requirements to process parameters is achieved, the problems that a traditional preparation method depends on experience and is low in efficiency and poor in repeatability are solved, and the research and development efficiency and the product performance limit of the electrode material are remarkably improved.

The invention discloses a surface-mounted tubular fuse structure and a preparation method thereof, and belongs to the technical field of overcurrent protection electronic components. The fuse structure comprises an insulating tube, a fuse body, an arc extinguishing body, an inner copper cap, an outer copper cap and a sealing colloid. The fuse body is arranged in the insulating tube body, the arc extinguishing body is filled in the insulating tube body and wraps the fuse body, the inner copper cap and the outer copper cap form a combined electrode cap, the sealing colloid is filled between the end part of the insulating tube body and a circular inner cap of the combined electrode cap, and the circular inner copper cap and the end part of the insulating tube body realize preliminary airtight packaging through welding or interference fit. And the sealing colloid is combined for secondary reinforced sealing, and the square outer copper cap provides a flat surface-mounted welding surface. The preparation method comprises the process steps of inner copper cap pressing, threading and spot welding, arc extinguishing material potting, outer copper cap assembling, sealant potting and the like. The problems that a traditional tubular fuse is large in installation space, has reliability hidden danger and is limited in high breaking capacity are solved. The fuse is widely applied to the technical field of tubular fuses.

The invention discloses a preparation method and preparation equipment of an all-solid-state battery and the all-solid-state battery, and belongs to the technical field of batteries. The preparation method comprises the following steps: S1, lamination: transferring a composite pole piece to an operation platform, and placing a positive pole piece above the composite pole piece to form a lamination structure; s2, gluing for the first time: gluing a tab area of the positive pole piece to form a first glue layer; s3, gluing for the first time: gluing on the solid electrolyte layer from the edge of the tab of the positive pole piece along the edge of the positive pole piece, and then curing to form a second glue layer to prepare an intermediate structure; s4, lamination again: continuing to stack the composite pole piece and the positive pole piece on the intermediate structure; and repeating the steps S2-S4 until a preset number of layers is reached, and preparing to obtain the all-solid-state battery. By improving the lamination gluing process, the problem of breaking of the solid electrolyte layer during pressing is effectively avoided, and the safety performance and the cycling stability of the battery are further improved.

The application provides an Al2O3 skeleton electrode sheet containing LiAlO2 / LiNbO3 double-coated layers and a sulfide solid-state lithium battery composite electrode, and belongs to the technical field of sulfide solid-state lithium batteries. + The application adopts an atomic layer deposition process to construct double-layer functional coating on the Al2O3 skeleton, wherein the inner layer LiAlO2 serves as a chemical barrier layer and can inhibit the reaction of sulfides and Al2O3, and the outer layer LiNbO3 serves as an ion conductor layer and can reduce the Li diffusion energy barrier. The application solves the problems of chemical side reactions and too high lithium ion migration energy barrier of the electrode / skeleton material and electrolyte interface by decoupling the barrier-conduction function of the LiAlO2 and LiNbO3 double-coated layers, taking the thermodynamic stable phase (LiAlO2) as an interface sacrificial layer, and utilizing the topological ion transport characteristics of the niobium-oxygen octahedral channel, so that the unity of interface chemical stability and ion conductivity is realized in sub-nanometer scale.

The invention belongs to the technical field of preparation of new energy materials and supercapacitors, and particularly relates to a Mo-Fe co-doped MnO2 / Ag-CNTs composite electrode and a preparation method and application thereof. The method comprises the following steps: firstly, preparing an activated carbon cloth substrate, a deposition solution A and a deposition solution B; then the deposition solution A and the deposition solution B are mixed to obtain a Mo-Fe-MnO2 deposition solution, and an Ag-CNTs deposition solution is prepared; and finally, electro-deposition is alternately carried out in the Mo-Fe-MnO2 deposition solution and the Ag-CNTs deposition solution, and the Ag-CNTs / Mo-Fe-MnO2 / Ag-CNTs composite material is obtained. The preparation process provided by the invention is simple and controllable, and the large-scale preparation of the high-performance composite electrode is easy. The electrode is unique in structure and excellent in performance, and a flexible solid-state PSCSC device assembled by the electrode has high energy storage density and efficient mechanical energy self-charging capacity and shows huge application potential in the field of self-powered wearable / implantable microelectronics.

The application relates to a composite ultrathin full-transparent intelligent intermediate connecting layer, which comprises, from top to bottom, a first composite electrode, a photonic management composite tunneling layer and a second composite electrode; the first composite electrode is a grid-shaped transparent conductive film formed by reducing graphene oxide and silver nanowires, wherein the diameter of the silver nanowires is 20-40 nm, the length is 15-40 mu m, and the mass ratio of the reducing graphene oxide to the silver nanowires is 1:3 to 1:6; the photonic management composite tunneling layer is a zinc oxide matrix embedded with perovskite quantum dots; and the second composite electrode is an intelligent response electrode formed by combining aluminum-doped zinc oxide and vanadium dioxide; through accurate regulation of the material and structure, the application realizes >88% light transmittance and <35 Omega / sq square resistance, and simultaneously has the functions of photonic down-conversion and intelligent thermal management, thereby significantly improving the performance and stability of a stacked battery.

The invention discloses a high-power lithium battery and a power distribution method, and belongs to the technical field of high-power lithium ion batteries. The device comprises: a composite electrode comprising a positive electrode, a negative electrode and an electrolyte; the negative electrode is a hard carbon / silicon composite material with hierarchical pores; lithium difluorophosphate and fluoro-carbonate are added into the electrolyte; the thermal management framework comprises a phase change material and a pulse type liquid cooling device; and the phase change material is filled between the adjacent composite electrodes. The system is ultra-low in energy consumption, the mode of continuous energy consumption of a traditional liquid cooling system is subverted, the system works depending on zero-energy-consumption PCM in most of the time, and the endurance of the vehicle is remarkably improved.

The invention provides a composite supercapacitor material, a preparation method thereof and a supercapacitor, and the preparation method comprises the following steps: immersing a foam metal substrate in a sulfur-molybdenum source deposition solution, and carrying out the first electrodeposition to obtain a foam metal substrate loaded with amorphous molybdenum sulfide; and immersing the foam metal substrate loaded with amorphous molybdenum sulfide into a silver source deposition solution, and carrying out second electrodeposition to obtain the composite supercapacitor material which comprises the foam metal substrate loaded with amorphous molybdenum sulfide and silver. According to the preparation method, the silver-amorphous molybdenum sulfide-foam metal composite electrode material is prepared through two-step electrochemical deposition, the preparation process is simplified, high temperature and high pressure are not needed, large-scale production can be achieved, and a high-performance water-based and solid-state symmetric supercapacitor constructed based on the material has a good application prospect. And collaborative improvement of energy density and power density and practicability of a solid-state device can be realized.

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.

A process for producing composite electrode particles coated with a granular silicon structure, a carbon layer, and zinc oxide, comprising the following steps: introducing several first silicon particles, a macromolecular material, bitumen, and an alcohol solution into a grinding mill for mixing to cause some of the first silicon particles to form several composite silicon particles; then introducing several porous carbon particles into the grinding mill for mixing to form a first mixture; then introducing the first mixture into a rotary evaporator to obtain several mixed powders; then introducing the mixed powders into a sintering furnace to perform atmospheric sintering to obtain several first composite particles coated with the carbon layer that incorporates the first silicon particles and the composite silicon particles;and then the introduction of several zinc oxide particles and the first composite particles into a roller mixer for mixing in order to obtain the composite electrode particles.

The application relates to a carbon-free sulfur composite electrode and a preparation method of a high-temperature full-solid-state battery, and belongs to the field of lithium ion batteries. x The electrode preparation method is that elemental sulfur and M The NPS3 material is ground, mixed, sealed in a quartz tube and heated to prepare a composite powder material, a sulfide solid-state electrolyte is added to the powder material and ground to obtain a carbon-free sulfur composite positive electrode material; the carbon-free sulfur composite positive electrode material is dispersed in a circular mold and hot-pressed to obtain a full-solid-state carbon-free sulfur composite electrode. The battery preparation method is that, in the mold, a sulfide solid-state electrolyte powder is dispersed on the surface of the composite electrode, and after hot pressing, a full-solid-state carbon-free sulfur composite electrode layer and a solid-state electrolyte layer are obtained; a high-melting-point lithium boron, lithium aluminum or lithium silicon alloy sheet is attached to the surface of the solid-state electrolyte layer, and after hot pressing, a full-solid-state battery composite core is obtained; and the battery composite core is sealed in a high-temperature-resistant solid-state battery mold and pressurized to obtain a high-temperature full-solid-state battery. The application is used for preparing a carbon-free sulfur composite electrode and a high-temperature full-solid-state battery.

The application provides a biomass-based composite electrode material, an electrode sheet and a hybrid supercapacitor, and belongs to the technical field of electrochemical energy storage. 3 The biomass-based composite electrode material comprises: a biomass-derived porous carbon matrix, pores with multiple pore sizes, the volume of the pores is 0.7-1.7 cm 2 / g; and nickel-cobalt layered double hydroxide nanosheets vertically anchored on the surface of the biomass-derived porous carbon matrix; the specific surface area of the composite electrode material is 900-1400 m 2 / g. The biomass-based composite electrode material of the application significantly improves the ion adsorption and charge storage capacity. In addition, the electrode material is applied in a capacitor, which effectively improves the energy density, electrode conductivity and cycle stability of the supercapacitor.

The invention relates to a multi-dimensional regulation metal organic framework composite electrode and a preparation method and application thereof, and the preparation method comprises the following steps: (1) placing a substrate in an electroplating solution, and carrying out pulse electrochemical deposition on the substrate to obtain a metal organic framework composite precursor; (2) putting the metal organic framework composite precursor obtained in the step (1) into conductive filler dispersion liquid, and performing ultrasonic treatment to obtain a metal organic framework composite precursor loaded with conductive filler; and (3) carrying out heat treatment on the metal organic framework composite precursor loaded with the conductive filler obtained in the step (2) to obtain the multi-dimensional regulation metal organic framework composite electrode, the on-off time ratio Ton / Toff of the pulse electrochemical deposition in the step (1) is (1-3): 1. The structure of the composite electrode is regulated and controlled through a pulse electrochemical deposition process, the composite electrode with excellent conductivity, high electrocatalytic activity and high stability is obtained, and the requirements of the fields of electrocatalysis, energy storage and the like are met.

The application discloses an electronic tuning type multifunctional sensor and a preparation method thereof. The sensor comprises a quartz crystal, a composite electrode and an oscillation circuit; the first end of the composite electrode is connected with the first end of the oscillation circuit, the second end of the oscillation circuit is connected with the first end of the quartz crystal, the second end of the quartz crystal is connected with the second end of the composite electrode, and the second end of the oscillation circuit is an output end. The composite electrode comprises a substrate, a planar inductive microelectrode and a planar capacitive microelectrode which are arranged on two sides and are connected in series through a via hole; a nano-magnetic iron oxide film is deposited on the inductive side, a hydroxylated ultra-high specific surface area disordered porous carbon film is deposited on the capacitive side, and a perfluorosulfonic acid protective layer is coated on the surfaces of the two films. The application forms a frequency selection network by connecting the double-sided electrode and the quartz crystal in series, and outputs an anti-interference frequency signal; the protective layer is insulated and prevents short circuit on the inductive side, and improves the humidity response on the capacitive side; manual overturning can switch the detection of metal damage, non-metal defects and environmental humidity, and the sensor has the advantages of high stability and low cost.

Provided in the present application are a composite electrode active layer, an electrode sheet and a secondary battery. The composite electrode active layer comprises an active material layer and a composite insulating layer which are stacked in sequence, wherein the composite insulating layer comprises inorganic particles, a heat-resistant polymer and a thermosensitive polymer; the weight ratio of the inorganic particles to the heat-resistant polymer to the thermosensitive polymer is (50-100):(1-10):(5-50); the melting temperature of the heat-resistant polymer is 180-450ºC; and the softening temperature of the thermosensitive polymer is 80-120ºC.

This invention provides a composite electrode for the comprehensive recovery of valuable metals, its preparation method, and its application. The composite electrode comprises a positive electrode active layer and a modified matrix layer. The modified matrix layer includes a tubular solid electrolyte body and a modified material layer disposed on the surface of the tubular solid electrolyte body; the modified material layer comprises a conductive polymer. The electrochemical lithium extraction combined with chemical reduction leaching of nickel, cobalt, and manganese using this composite electrode not only achieves high-efficiency recovery of valuable metals such as lithium, nickel, cobalt, and manganese, but also significantly reduces wastewater treatment costs and environmental risks.

The invention relates to a sulfide modified carbon fluoride composite electrode and a preparation method thereof, and belongs to the technical field of battery material preparation. Sulfide and a carbon fluoride material are subjected to ball milling to obtain a sulfide modified carbon fluoride composite material; adding the composite material and a conductive agent into a polymer binder solution to obtain sulfide modified carbon fluoride composite electrode slurry; and coating a current carrier with the slurry, and carrying out vacuum drying to obtain the sulfide modified carbon fluoride composite electrode. According to the invention, the surface morphology and conductive structure of the carbon fluoride material particles are modified by the high-conductive sulfide through a simple ball milling method. The sulfide has multivalent states and structural defect vacancies, not only stabilizes a high discharge platform of the carbon fluoride material at the initial stage of discharge, but also increases a reaction platform at the final stage of discharge, so that the discharge capacity of the carbon fluoride material is effectively improved. And meanwhile, the conductivity and the ion migration rate of the carbon fluoride material are improved, so that the composite electrode has a high working voltage platform and energy output performance under a high-rate discharge condition.

The invention discloses an iron fluoride / iron cyanamide and carbon coating layer composite electrode material and a preparation method thereof, and the method comprises the steps: 1, firstly adding ammonium fluoride into deionized water, fully and uniformly dissolving to obtain a solution A, and then adding hydrazine hydrate into the solution A to obtain a solution B; 2, adding FeNCN into the solution B, adding ammonia water to adjust the pH value to 6-10, stirring, carrying out suction filtration, and separating out a precipitate to obtain a sample F-FeNCN-1; 3, the sample F-FeNCN-1 is put into a tubular furnace, argon is introduced into the tubular furnace, the temperature is raised to 320-380 DEG C from the room temperature at the temperature raising rate of 10-15 DEG C / min, heat preservation is conducted for 30 min, and a sample F-FeNCN-2 is obtained; and 4, grinding a sample F-FeNCN-2, continuously putting the ground sample F-FeNCN-2 into the tubular furnace, introducing argon into the tubular furnace, heating from room temperature to 450-500 DEG C at a heating rate of 10-15 DEG C / min, and preserving heat for 30 minutes to obtain the ferric fluoride / iron cyanamide and carbon coated composite electrode material which has the advantages of high conductivity, stable interface, small volume expansion, high capacity and long cycle life.

The application discloses a kind of methods for synthesizing MOFs / cellulose aerogel composite electrode material and its electrocatalytic oxygen evolution application, belong to electrocatalytic functional material preparation process technical field.It is specifically disclosed a kind of preparation method of Cr-NiFe MOF / cellulose aerogel electrode material, including the following steps, Cr source, Ni source and Fe source are dissolved in deionized water and are added to the solution of N,N dimethylformamide containing terephthalic acid, after stirring uniformly, transfer to Teflon reaction kettle, 160 DEG C is reacted 24h and obtains Cr-NiFe MOF;Subsequently, the obtained Cr-NiFe MOF powder is dispersed in carboxymethyl cellulose solution, a certain amount of acetone is added, after mixing uniformly at 80 DEG C, liquid nitrogen freezing is carried out, then 48h of freeze drying can be obtained Cr-NiFe MOF / cellulose aerogel composite material.This composite electrode material when used as electrocatalytic oxygen evolution material, show superior activity and extremely high stability.Especially, at 10mA·cm-2, show 235mV of low overpotential, tafel slope is 53.7mV·dec-1, stability is more than 210h, is one of the best aerogel composite materials of catalytic performance at present, has good application prospect in catalysis and energy conversion field.