1111results about "Fuel and secondary cells" patented technology

A first zinc-air battery module and a second zinc-air battery module are formed by connecting two zinc-air batteries in series, the two zinc-air batteries are located on the same plane, the first zinc-air battery module and the second zinc-air battery module are arranged in a mirror symmetry mode, the positive electrode part is close to the mirror surface position, and the negative electrode part is close to the mirror surface position. The gas diffusion partition plate is arranged between the first zinc-air battery module and the second zinc-air battery module, the first zinc-air battery module and the second zinc-air battery module are connected in series and then are connected with the charging wire, the first zinc-air battery module and the second zinc-air battery module are arranged in the shell together, and the side surface of the shell has air permeability. According to the internal oxygen type zinc-air battery power bank with the built-in positive electrode and oxygen introduction from the side face, the zinc-air battery power bank can be attached to the back face of a mobile phone and then can be flatly placed on a table top in the using process, and meanwhile the zinc-air battery power bank has the advantages of being light, rapid in charging, low in price and convenient to carry.

The present disclosure relates to a battery system supporting a plurality of operation modes according to the SoC. To this end, the battery system is characterized by comprising: one or more batteries supporting multiple operation modes for power storage or supply according to the state of charge (SoC); and a controller which determines an operation mode of the batteries among the plurality of operation modes according to the power supply state of a grid and the SoC of the batteries, wherein the batteries include a battery supporting an uninterrupted power supply (UPS) mode at an SoC at or below a first standard.

The invention provides a zinc-nickel air flow battery energy storage cabinet. The zinc-nickel-air flow battery energy storage cabinet comprises a control module and a plurality of flow battery energy storage modules, each flow battery energy storage module comprises a plurality of supporting layers, an electrolyte storage tank is fixed to a first supporting layer in the supporting layers in a limited mode, a galvanic pile is fixed to a second supporting layer above the first supporting layer in a limited mode, and the control module is connected with the control module. The third supporting layer above the second supporting layer is used for installing an electric pile sensor module, a liquid delivery pump is arranged below the first supporting layer, and the electric pile, the liquid delivery pump and the electrolyte storage tank are connected through a liquid circulation pipeline; the control module comprises an air compressor; the air compressor is connected with the electric pile through an air pipeline; the control module further comprises an electric energy management system, and the electric energy management system comprises an energy management system, a power conversion system and a battery management module. According to the embodiment provided by the invention, the integration of the zinc-nickel air flow battery is realized.

The invention discloses a magnesium-carbon dioxide battery positive electrode material and a preparation method thereof, the chemical composition general formula of the magnesium-carbon dioxide battery positive electrode material is Mo4 / 3R2a / 3B2-VR ', VR' represents vacancy of R ', R is one or more of Lu, Dy, Er, Ho and Tb, R' is Y or Sc, and a is greater than or equal to 0.1 and less than or equal to 0.9; the preparation method comprises the following steps: calcining the material to obtain Mo4 / 3R '2 / 3-2a / 3R2a / 3AlB2, adding an etching agent, and selectively etching transition metal (Y or Sc) and Al to obtain a ternary transition metal boride, namely the positive electrode material of the magnesium-carbon dioxide metal battery. The preparation method is simple, the process is easy to control, and the prepared positive electrode material of the magnesium-carbon dioxide metal battery not only has excellent catalytic performance, but also shows low overpotential and long cycle life, and can efficiently and stably absorb and utilize carbon dioxide.

The invention relates to the technical field of catalytic materials, in particular to a carbon-based monatomic catalyst doped with five non-metallic elements and a preparation method and application of the carbon-based monatomic catalyst doped with the five non-metallic elements. An organic precursor (MOF-coated POSFN-CTP) rich in five non-metallic element heteroatoms is prepared through a simple coprecipitation method at the room temperature; and annealing to obtain the carbon material (POSFNC) doped with five non-metallic elements. On the basis, the POSFNC is further impregnated with a transition metal precursor, annealing is carried out again, and the carbon-based monatomic catalyst doped with five non-metallic elements is successfully synthesized. The carbon-based monatomic catalyst with a hollow porous structure and five non-metallic element heteroatoms uniformly distributed can be constructed through the method, the synthesis process has the advantages of simplicity, convenience, economy and environmental protection, and the ORR activity and stability of the prepared catalyst exceed those of a commercial Pt / C catalyst.

The invention discloses an application of a single-metal Co (at) N-C nanotube with high C and N contents. The Co (at) N-C nanotube is used for a zinc or magnesium metal air battery positive electrode material catalyst. The application of the oxygen reduction catalyst in a primary zinc-air battery, a primary magnesium-air battery and a secondary zinc-air battery is realized. The oxygen reduction catalytic material is characterized by being a monometallic catalyst, and shows relatively high energy density and power density in a metal battery. The half-wave potential of the prepared single-metal catalyst Co (at) NC-1Co (at) NC-1 is 0.85 V, and the half-wave potential exceeds the half-wave potential of commercialized 20% Pt / C; the limit diffusion current density Jd is 5.44 mA cm <-2 >, which is equivalent to that of commercial 20% Pt / C. The power density of a primary zinc air battery taking Co-coated NC-1 as the oxygen reduction catalyst is 202 mW cm <-2 >, and the maximum energy density is 928 Wh kg <-1 > Zn, which is higher than that of a Pt / C-based zinc metal air battery. The catalyst has the advantages of easily available raw materials, simple preparation and low cost, and has potential commercial application value.

The invention discloses a lithium-oxygen battery electrolyte and a preparation method and application thereof. The lithium-oxygen battery electrolyte comprises a lithium salt, an additive and a solvent, the additive is 1, 3-dimethylimidazole iodized salt. The redox medium (organic iodized salt) is added into the ether electrolyte of the lithium oxygen battery, anions of the redox medium can reduce the charge-discharge overpotential of the lithium oxygen battery, cations of the redox medium can form an in-situ protection layer on a lithium negative electrode, the redox medium is prevented from reacting with the lithium negative electrode, lithium corrosion and lithium dendrite growth are effectively inhibited, and the service life of the lithium oxygen battery is prolonged. And the lithium-oxygen battery has excellent electrochemical performance and long cycle stability.

The invention relates to the technical field of mesoporous materials, and discloses an ordered mesoporous phenolic resin sphere, an ordered mesoporous carbon sphere and a preparation method and application thereof. The ordered mesoporous phenolic resin sphere has a uniform spherical morphology and a highly ordered mesoporous structure, the particle size of the ordered mesoporous phenolic resin sphere is 40-2000nm, and the aperture of the ordered mesoporous phenolic resin sphere is 3-10nm; the solid content reaches 100g / L. The preparation method comprises the following steps: dissolving a surfactant in a composite solvent, and uniformly stirring to obtain a precursor solution; dissolving a phenolic precursor and formaldehyde in the precursor solution, and slowly adding a pore-enlarging agent to obtain a uniform emulsion; adding a catalyst into the emulsion to carry out polymerization reaction; and after the reaction, collecting a solid phase, and carrying out heat treatment in an inert atmosphere to obtain the ordered mesoporous phenolic resin spheres. The ordered mesoporous phenolic resin spheres and the ordered mesoporous carbon spheres have uniform spherical structures, highly ordered mesoporous structures and high solid content; the preparation method is simple in process, high in expansibility and beneficial to large-scale production.

The invention discloses application of a benzoquinone-based covalent organic framework material as a bifunctional photocatalyst in a photo-assisted lithium-air battery, and the benzoquinone-based covalent organic framework material is prepared by taking cyclohexanehexone octahydrate and 2, 3, 5, 6-tetraaminocyclohexane-2, 5-diene-1, 4-diketone as raw materials, ethylene glycol as a solvent and acetic acid as a catalyst through a hydrothermal reaction. And carrying out Schiff base reaction under the protection of nitrogen atmosphere. The benzoquinonyl covalent organic framework material has a large number of donor and acceptor units, has a wide visible light absorption range, can be used as a photo-assisted lithium-air battery bifunctional photocatalyst, greatly inhibits photon-generated carrier recombination, reduces the over-potential of a photo-assisted lithium-air battery, remarkably improves the battery assembly efficiency, and has a wide application prospect. And a new direction is provided for selection of photocatalysts in the field of lithium-air batteries.

The invention belongs to the technical field of battery materials, and discloses a nitrogen-doped porous carbon loaded iron-selenium transition metal composite material as well as a preparation method and application thereof. According to the method, Se atoms are innovatively introduced into a Fe monatomic catalyst, and components are uniformly distributed on a nitrogen-doped carbon-based material. By introducing Se, the electron structure and microenvironment of Fe sites can be hybridized and adjusted through a p-d orbit, so that the adsorption / desorption behavior between active sites and intermediates in the ORR process is optimized, the efficient utilization of the catalyst is ensured, and the catalytic efficiency is greatly enhanced through the synergistic effect among iron-selenium particles. In addition, the synthetic method of the composite material is simple and easy to implement, has high economical efficiency, and lays a solid foundation for achieving industrial mass production of the composite material. Compared with a traditional platinum-carbon catalyst, the composite material catalyst has remarkable advantages in electrochemical performance.

A rechargeable battery is disclosed. The rechargeable battery comprises an anode, a cathode comprising a lithium-ion intercalation host, and an electrolyte comprising a solvent and a halogen-containing compound acting as an active cathode conversion material, wherein the electrolyte is in contact with the anode and the cathode.

To provide an air electrode for an air secondary battery, which is capable of reducing an amount of a catalyst to be used in comparison with conventional ones and which is also excellent in output characteristics and durability, and a method for manufacturing the air electrode.SOLUTION: An air electrode 2 includes a nickel foam 9a, a gas diffusion layer 6 crimped on one side of the nickel foam 9a, and a catalyst layer 8 formed on the other side of the nickel foam 9a. The gas diffusion layer 6 is located in a position, of an air secondary battery 4, facing the atmosphere, and includes a first conductive material having conductivity and a first fluororesin having water repellency. The catalyst layer 8 is located inside the air secondary battery 4, and includes a catalyst having dual functions of oxygen evolution and oxygen reduction, a second conductive material having conductivity, and a second fluororesin having water repellency.SELECTED DRAWING: Figure 1

Provided are solid-state hybrid electrolytes. The hybrid electrolytes have a polymeric material layer, which may be a polymer copolymer layer or a gel polymer copolymer layer, disposed on at least a portion of an exterior surface or all of the exterior surfaces of a solid-state electrolyte. A hybrid electrolyte can form an interface with an electrode of an ion-conducting battery that exhibits desirable properties. The solid-state electrolyte can comprise a monolithic SSE body, a mesoporous SSE body, or an inorganic SSE having fibers et strands, which may be aligned. In the case of solid-state electrolytes that have strands, the strands can be formed using a sacrificial template. The hybrid solid-state electrolytes can be used in ion-conducting batteries, which may be flexible, ion-conducting batteries.

A hybrid electrochemical device configuration that comprises a first electrode that includes a redox reactive material or an alloy based on a transition metal, a second electrode that includes a multi-functional catalyst to catalyze hydrogen evolution reaction, hydrogen oxidation reaction, and water oxidation reaction at the second electrode, a separator disposed between the first and second electrode, an electrolyte disposed between the first electrode and the second electrode, and a conduit which provides the means to compensate for water loss in the electrolyte during electrochemical device operation. At least one valve is included that connects the electrolyte management system to the conduit system and a valve to connect the gas formed in the electrode to the gas management system. The electrochemical device configurations include several individual devices stacked on top of each other and separated from each other using separation plates.

This invention relates to a defect-laden porous carbon support for a stable iron-based diatomic catalyst, its preparation method, and its application in air batteries, belonging to the field of catalyst preparation technology. The preparation method involves the following steps: ZIF-8 is subjected to high-temperature heat treatment under a nitrogen atmosphere, followed by rapid cooling under a liquid nitrogen atmosphere; then mixed with an iron metal source, and ethanol is added for defect backfilling. After stirring and drying, a second heating is performed to obtain the catalyst. This method can firmly and precisely anchor two metal atoms onto the carbon support, ensuring the formation of stable diatomic sites and their full exposure. This ensures that the active sites are in full contact with the substrate to exert their efficient catalytic effect, avoiding particle agglomeration that could lead to clusters or metal particle formation, causing some sites to be encapsulated and hindering their high activity. This method can be effectively applied in air batteries.

A bimetal active site doped carbon-based catalyst, which is particularly a ZnMn-N-C catalyst. The ZnMn-N-C catalyst is prepared by using 1H-1,2,3-triazole, manganous nitrate and zinc chloride as reaction raw materials, subjecting same to a solvothermal reaction and then to drying to obtain a Mn-MET-ZnCl2 powder, and then sequentially subjecting the powder to primary pyrolysis, a sulfuric acid treatment and secondary pyrolysis. By respectively using 1H-1,2,3-triazole and zinc chloride as a mesopore forming agent and a micropore forming agent, and adjusting the pore-forming sequence and controlling the pore-forming process by means of pyrolysis, a large number of mesopores are preferentially formed, and then a large number of micropores are uniformly distributed in the mesopores, thereby forming a hierarchical pore channel structure and overcoming the problem of the collapse of the pore channel structure during the formation of the structure; and the obtained bimetal site doped carbon-based catalyst ZnMn-N-C has a high specific surface area of 1837.9 m2 / g and exhibits a good ORR activity (E1 / 2=0.867 V vs. RHE), and a primary zinc-air battery assembled by using the catalyst ZnMn-N-C as a positive oxygen reduction catalyst has a high energy density of 889 Wh / kg-1 Zn.

The invention belongs to the field of material preparation, and particularly relates to a 2H-phase molybdenum disulfide crystal and a preparation method and application thereof. Comprising the following steps: mixing potassium molybdate and powdered sulfur, grinding, sintering in an Ar / H2 mixed atmosphere, and cooling to room temperature to obtain a product A; mixing the product A with sulfur powder, grinding, sintering in an Ar / H2 mixed atmosphere, and cooling to room temperature to obtain a product B; and sintering the product B in an Ar / H2 mixed atmosphere, cooling to room temperature, washing, and drying to obtain the 2H-phase MoS2 crystal. According to the preparation method disclosed by the invention, the purity and the crystal integrity of the 2H-phase MoS2 crystal are remarkably improved, and meanwhile, the interlayer spacing of the 2H-phase MoS2 crystal is optimized; in addition, the 2H-phase MoS2 crystal disclosed by the invention is used as a catalyst of a Li-CO2 battery positive electrode material, so that the electrochemical performance and the energy conversion efficiency of a Li-CO2 battery are remarkably improved.

The invention provides an assembling method of a zinc-air battery power bank and the zinc-air battery power bank. The zinc-air battery power bank comprises a shell and a battery cell, the battery cell is located in the shell and is composed of a first zinc-air battery, a second zinc-air battery, a third zinc-air battery and a fourth zinc-air battery, each zinc-air battery is provided with a positive electrode and a negative electrode, and the positive electrode and the negative electrode are arranged in the shell. A connecting piece is welded between the negative electrode of the first zinc-air battery and the positive electrode of the second zinc-air battery to form a first series connection part, and a connecting piece is also welded between the negative electrode of the third zinc-air battery and the positive electrode of the fourth zinc-air battery to form a second series connection part. According to the assembling method of the zinc-air battery power bank and the zinc-air battery power bank, the problem that the tabs are bent for multiple times in automatic production is solved, the welding position is fixed through the adhesive tape, short circuit is avoided, the battery cell is fixed with the minimum adhesive pasting frequency, automatic production of the zinc-air battery power bank is achieved, and the production efficiency and the product quality are improved.

The present disclosure relates to an electrode (1) for a secondary lithium metal battery, the electrode comprises: a current collector (2), an anode metal layer (3) comprising lithium, and at least one graded metal alloy layer (4a,4b) that extends along one or more opposing faces of the anode metal layer. The graded metal alloy layer comprising a mixture of lithium and a further metal composition, whereby the concentration of lithium relative to the further metal composition decreases outwardly from the anode metal layer. The disclosure further relates to a battery comprising the electrode and a method of manufacturing.

The present invention relates to a positive electrode, a lithium-air battery including the positive electrode, and a method for preparing the positive electrode. A positive electrode configured to use oxygen as a positive electrode active material, the positive electrode comprising: a porous membrane, wherein the porous membrane comprises a metal oxide, and wherein the surface of the porous membrane has a root mean square (RMS) roughness (Rq) of about 0.01 micrometers to about 1 micrometer, and the porosity of the porous membrane is about 50 volume % to about 99 volume %, based on the total volume of the porous membrane.

To provide an air electrode catalyst that can contribute to improvement of cycle life characteristics more than conventional, an air electrode containing this air electrode catalyst, and an air secondary battery containing this air electrode.SOLUTION: A battery 2 includes an electrode group 10 including an air electrode 16 and a negative electrode 12 superimposed via a separator 14, and a container 4 containing the electrode group 10 together with an alkaline electrolyte 82, and the air electrode 16 contains an air electrode catalyst, which is an air electrode catalyst made of a bismuth ruthenium composite oxide containing at least Bi, Ru, and Si, and Si / Bi, which represents the atomic ratio of Si to Bi, is 0.007 or less.SELECTED DRAWING: Figure 1

The invention relates to the technical field of lithium-oxygen batteries, in particular to a lithium-oxygen battery electrolyte and a preparation method thereof. The lithium-oxygen battery electrolyte comprises an organic solvent, an electrolyte lithium salt and a multifunctional additive, the multifunctional additive is prepared by introducing an MOF material, a boron nitride nanosheet and an ionic liquid, coating of the boron nitride nanosheet and introduction of the ionic liquid improve the stability of the multifunctional additive, and the stability of the multifunctional additive is improved. The 1-ethyl-1-methylpyrrolidinium bis (trifluoromethylsulfonyl) imine can effectively play a role for a long time, efficiently captures and stabilizes oxygen free radicals generated in the charging and discharging process, reduces the oxidative degradation of the oxygen free radicals to a positive electrode binder, prolongs the cycle life of the battery, improves the overall battery performance, and improves the battery performance. Powerful support is provided for commercial application of the lithium-oxygen battery.

The invention relates to the technical field of lithium air batteries, in particular to a lithium air battery, a battery system and a use method. A lithium air battery includes: a battery case having a positive electrode chamber; and the compression air supply assembly is arranged outside the battery shell, and the compression air supply assembly is communicated with the positive electrode chamber through a pipeline. The invention provides a lithium air battery, a battery system and a use method, and aims to solve the problem of complex internal structure of an existing air compressor.

The invention discloses a Joule thermal preparation method of a carbon-supported high-entropy sulfide catalyst and application of the carbon-supported high-entropy sulfide catalyst in a zinc-air battery. A metal chlorine salt solution is used as a metal precursor, and sulfur is used as a sulfur source. Sulfur, carbon powder and a metal chlorine salt solution are uniformly mixed and loaded on a conductive carrier, and Joule heat treatment is carried out. Instantaneous high temperature acts on a carbon-supported metal precursor, the metal precursor is decomposed, S8 is decomposed into high-activity S2 gas, diffusion of sulfur atoms is accelerated at high temperature, combination of S2 and reduced metal atoms is promoted, sulfide bonds are formed, meanwhile, segregation is inhibited through rapid cooling, and finally the uniform single-phase carbon-supported high-entropy sulfide catalyst is formed. The uniformly distributed carbon-loaded high-entropy sulfide catalyst is prepared by Joule thermal pyrolysis, the preparation method is simple, energy-saving and environment-friendly, and the catalyst can simultaneously catalyze an oxygen reduction reaction and an oxygen evolution reaction, is used as a bifunctional catalyst for a zinc-air battery, has excellent catalytic activity and stability, and is easy to popularize and use.

Systems and methods of the various embodiments may provide device architectures for batteries. In various embodiments, these may be primary or secondary batteries. In various embodiments these devices may be useful for energy storage. Various embodiments may provide a battery including an Oxygen Reduction Reaction (ORR) electrode, an Oxygen Evolution Reaction (OER) electrode, a metal electrode; and an electrolyte separating the ORR electrode and the OER electrode from the metal electrode.

The invention relates to a preparation method of a two-dimensional nano layered polymetallic phosphorus sulfide, which comprises the following steps: mechanically and uniformly mixing a lithium-containing transition metal precursor and P2S5 in an inert atmosphere, then heating for melting and calcining, adding a crude product into an alcohol-water solution, heating and stirring, centrifugally separating, washing a precipitate, and drying to obtain the two-dimensional nano layered polymetallic phosphorus sulfide. The chemical formula of the polymetallic phosphorus sulfide is LixM1aM2bM3cM4dM5ePS3, x is greater than or equal to 0 and less than or equal to 1.2, and M1, M2, M3, M4 and M5 are independently selected from Co, Fe, Mn, Ni, Ti, Cu, Zn, Cd, Cr and Mo; a + b + c + d + e = 1, and a, b, c, d and e > = 0; wherein the transverse size of the two-dimensional nano layered multi-transition metal phosphorus sulfide is 0.5-10 [mu] m, and the thickness of the nanosheet is 10-40 nm. According to the invention, the two-dimensional phosphorus sulfide nano layered material can be rapidly prepared through the reaction of the transition metal precursor and phosphorus sulfide, and the two-dimensional phosphorus sulfide nano layered material shows good activity and stability when being used as a Li-O2 battery solid electrolyte.

The invention belongs to the technical field of new energy materials, and discloses a hyaluronic acid (HA)-enhanced ternary composite hydrogel electrolyte and an application thereof in a flexible zinc air battery, the electrolyte is prepared from polyacrylamide (PAM), carboxymethyl cellulose (CMC) and hyaluronic acid (HA) through a cross-linking reaction, according to the formula, the high-temperature-resistant PAM / CMC composite material is prepared from 1 to 3 parts of PAM, 0.1 to 0.3 part of CMC, 0.05 to 0.15 part of HA, 0.03 to 0.07 part of a cross-linking agent MBAA, 0.01 to 0.03 part of an initiator KPS and 15 to 25 parts of deionized water. The electrolyte forms a multiple hydrogen bond network through an oxygen-containing functional group of HA, and has high water-retaining property, excellent mechanical property and high ionic conductivity (0.321 S / cm in an alkaline environment and 0.200 S / cm in a neutral environment). The flexible zinc-air battery based on the electrolyte respectively realizes the power density of 63.25 mW / cm < 2 > and 28.40 mW / cm < 2 > under alkaline / neutral conditions, has the cycle life of 45 hours and 25 hours (bending by 90 degrees), can drive electronic equipment (with the power of 10-200mW) such as an LED (Light Emitting Diode), a display screen and a mobile phone, and provides an efficient and stable energy supply solution for a wearable energy device.

An electrode, including a first iron material and a second iron material. The first iron material is a first reduced iron and the second iron material is different from the first iron material. Also provided is an electrochemical cell comprising an electrode including a first iron material and a second iron material. Further provided is a method of making an electrode.

The invention discloses a preparation method and application of an MOF (Metal Organic Framework) derived carbon catalyst for regulating and controlling oxygen reduction catalytic performance based on surface strain. The method comprises the following steps: firstly, constructing a cubic MOF core under the assistance of a cationic surface active agent template through coordination self-assembly of a cobalt ion node and an imidazole ligand; then, an MOF heterogeneous core-shell layer is constructed on the surface of the core through a zinc ion mediated epitaxial growth technology, and a double-layer cubic MOF precursor with a clear core-shell interface is formed. Through carbonization treatment at different temperatures, the core MOF generates controllable surface strain in the carbonization process, metal active site coordination and electronic structures can be adjusted, and the adsorption strength of sites to oxygen reduction intermediates is optimized. A rigid porous carbon frame formed after carbonization of an epitaxial MOF heterogeneous core-shell layer constructs a three-dimensional through mass transfer network through micro-mesoporous synergy, meanwhile, the rigid porous carbon frame and the strained core form a nanoscale space isolation area, and thermal migration of metal active sites and Ostwald curing are effectively inhibited by means of the geometric confinement effect. The activity and the stability of the catalyst are remarkably improved based on multiple synergistic effects caused by evolution of an intrinsic micro-nano structure induced by surface strain. The MOF derived carbon catalyst for regulating and controlling the oxygen reduction catalytic performance based on the surface strain, provided by the invention, is simple in preparation process and low in cost, and shows excellent performance and wide application prospect in a zinc-air battery.

The invention discloses a preparation method and application of a metal modified amino porphyrin COF material based on ferrocene dicarboxaldehyde, and the preparation method comprises the following steps: (1) adding ferrocene dicarboxaldehyde and 5, 10, 15, 20-tetra (4-aminophenyl) porphyrin into an organic solution, and carrying out ultrasonic mixing; (2) adding a catalyst into the dispersion liquid, ultrasonically mixing uniformly, and carrying out multiple freezing degassing circulation treatment; (3) after the treatment in the step (2), carrying out heat preservation reaction, cooling to room temperature, carrying out centrifugal separation on turbid liquid, washing the precipitate, then soaking the precipitate by using an organic solvent, and centrifugally collecting a precipitate product; and (4) drying the precipitation product, and collecting to obtain a black powder sample COF material. The COF material prepared by the invention has excellent electro-catalytic performance and stability, and has a good application prospect in metal-air batteries.