CN113851663A - Magnesium air battery catalyst, magnesium air battery air cathode and preparation method thereof, magnesium air battery and electric equipment - Google Patents
Magnesium air battery catalyst, magnesium air battery air cathode and preparation method thereof, magnesium air battery and electric equipment Download PDFInfo
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Abstract
The application provides a magnesium air battery catalyst, a magnesium air battery air cathode, a preparation method of the magnesium air battery air cathode, a magnesium air battery and electric equipment. The preparation method of the magnesium air battery catalyst comprises the following steps: mixing raw materials including copper nitrate, potassium citrate and potassium cobalt cyanide, reacting to obtain a precursor, and performing heat treatment to obtain CuO @ Co3O4And (3) nanoparticles. Magnesium air battery catalyst prepared by using preparation method. The magnesium air cell air cathode includes a magnesium air cell catalyst. The preparation method of the air cathode of the magnesium air battery comprises the following steps: mixing the raw materials to obtain slurry; and coating the slurry on a pole piece, and drying to obtain the air cathode of the magnesium air battery. A magnesium air battery includes a magnesium air battery air cathode. The electric equipment comprises a magnesium air battery. The magnesium air battery catalyst provided by the application has excellent oxygen reduction performance and high catalytic efficiency.
Description
Technical Field
The application relates to the field of materials, in particular to a magnesium air battery catalyst, a magnesium air battery air cathode, a preparation method of the magnesium air battery air cathode, a magnesium air battery and electric equipment.
Background
The metal-air battery has the characteristics of high energy density, small volume, long discharge life, simple structure and the like, and is an ideal electrochemical energy storage and conversion device. The magnesium air battery is a typical metal air battery and has the advantages of high energy density, high theoretical voltage, large theoretical specific capacity, low cost, light weight, environmental friendliness, abundant reserves and the like. In addition, abundant raw materials, low cost, high safety and environmental protection are inherent advantages of the magnesium air battery, and great application potential is shown.
The magnesium air battery is composed of an air cathode, electrolyte and a magnesium anode, has a simple structure, and is beneficial to realizing industrial application. Theoretically speaking, the magnesium air battery is a very ideal power source, but still has the limiting factors of slow reaction kinetics progress, higher overpotential, low coulombic efficiency caused by anode self-corrosion and the like. Among them, the Oxygen Reduction potential is generally not high, and the Reduction Reaction is performed in multiple steps, which may cause the cathode Oxygen Reduction Reaction (ORR) in the magnesium air battery to be slow, cause problems of high overpotential, low coulombic efficiency, etc., and restrict the performance of the whole battery, becoming an important influencing factor for the development and realization of high energy density commercial production. The performance of the cathode oxygen reduction catalyst greatly influences the performance of the whole air battery system, including energy efficiency, cycle life, cost and the like, and directly determines the energy conversion efficiency of the air battery. Therefore, the search for high performance, high efficiency, durable, low cost, stable ORR catalysts is the key to the development of metal-air batteries. However, most of the conventional ORR catalysts with good performance are precious metal catalysts such as Pt, which have low material storage and high cost and are difficult to satisfy mass industrial production and industrial application. Therefore, the research and development of the ORR catalyst with low price, rich resources and high efficiency replaces noble metal catalysts such as Pt and the like, and has important significance for the research and development and application of the magnesium air battery.
Disclosure of Invention
The present application aims to provide a magnesium air battery catalyst, a magnesium air battery air cathode and a preparation method thereof, a magnesium air battery and electric equipment, so as to solve the above problems.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a preparation method of a magnesium air battery catalyst comprises the following steps:
mixing raw materials including copper nitrate, potassium citrate and potassium cobalt cyanide, and reacting to obtain a precursor;
carrying out heat treatment on the precursor to obtain CuO @ Co3O4And (3) nanoparticles.
Preferably, the mixing comprises:
and mixing the aqueous solution of the copper nitrate and the aqueous solution of the potassium citrate to obtain a mixed solution, and then dropwise adding the aqueous solution of the potassium cobalt cyanide into the mixed solution.
Preferably, the reaction is carried out under stirring;
preferably, the stirring time is 10-30 min;
preferably, the stirring is followed by aging;
preferably, the aging time is 20-24 h;
preferably, the aging process further comprises the following steps: carrying out solid-liquid separation on the reaction system to obtain solidDrying to obtain Cu3[Co(CN)6]2·9H2O is the precursor;
preferably, the drying temperature is 60-80 ℃, and the drying time is 20-24 h;
preferably, the precursor has an overall cubic shape with a size of 1 to 2 μm.
Preferably, the heat treatment comprises:
calcining the precursor at the temperature of 900 ℃ for 1-5h, and cooling to obtain the CuO @ Co3O4A nanoparticle;
preferably, the heating rate of the heat treatment is 1-10 ℃/min;
preferably, said CuO @ Co3O4The size of the nanoparticles is 100-500 nm.
The application also provides a magnesium air battery catalyst, which is prepared by using the preparation method of the magnesium air battery catalyst.
The application also provides an air cathode of the magnesium-air battery, which comprises the magnesium-air battery catalyst.
The application also provides a preparation method of the air cathode of the magnesium air battery, which comprises the following steps:
mixing raw materials including the magnesium air battery catalyst, a binder, a pore-forming agent, a conductive agent and an organic solvent to obtain slurry;
and coating the slurry on a pole piece, and drying to obtain the air cathode of the magnesium air battery.
Preferably, the conductive agent comprises carbon black;
preferably, the pole piece comprises hydrophobic conductive carbon paper.
The application also provides a magnesium air battery, which comprises the air cathode of the magnesium air battery.
The application also provides electric equipment comprising the magnesium air battery.
Compared with the prior art, the beneficial effect of this application includes:
the application provides a preparation method of a magnesium air battery catalyst, which comprises the following steps ofMixing raw materials including copper nitrate, potassium citrate and potassium cobalt cyanide, reacting to obtain a Prussian blue analogue serving as a precursor, and performing heat treatment to obtain a double-metal oxide nano material CuO @ Co3O4The morphology of the catalyst is effectively regulated and controlled, and the electrochemical performance of the catalyst is improved;
the preparation method adopts a simple coprecipitation method and heat treatment to obtain CuO @ Co3O4The nano particles do not need a complex preparation process, are simple and convenient to operate and are easier to apply to actual production; other organic solvents, strong acid, strong base and the like are not required to be added, and compared with the traditional method that the reaction condition is mild in acidic or alkaline environment, the method is safer, more stable and more environment-friendly; the raw materials are wide in source and low in cost;
the precursor obtained by the preparation method has uniform appearance, and the size of crystal grains can be effectively reduced and the specific surface area can be increased through heat treatment; in alkaline electrolytes, CuO @ Co3O4The limiting current density of the nano particles is higher than that of a commercial Pt catalyst, and the nano particles show excellent oxygen reduction performance; under a neutral environment, CuO @ Co3O4The nanoparticles are shifted only by 20mV in half-wave potential after 5000 cycles, and have extremely excellent stability.
The magnesium air battery catalyst provided by the application has the advantages of good catalytic performance, excellent oxygen reduction performance and excellent stability.
The magnesium air battery and the air cathode thereof have the advantages of high energy conversion efficiency, long cycle life and low cost.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments are briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application.
FIG. 1 is the CuO @ Co prepared in example 13O4XRD pattern of nanoparticles;
FIG. 2 is the CuO @ Co prepared in example 13O4S of nanoparticlesAn EM map;
FIG. 3 is the CuO @ Co prepared in example 23O4XRD pattern of nanoparticles;
FIG. 4 is the CuO @ Co prepared in example 23O4SEM images of nanoparticles;
FIG. 5 is the CuO @ Co prepared in example 33O4XRD pattern of nanoparticles;
FIG. 6 is the CuO @ Co prepared in example 33O4SEM images of nanoparticles;
FIG. 7 is an XRD pattern of a Prussian blue analogue precursor prepared in example 4;
FIG. 8 is an SEM image of a Prussian blue analogue precursor prepared in example 4;
FIG. 9 is the CuO @ Co prepared in example 23O4An air cell open circuit voltage plot of nanoparticle assembly;
fig. 10 is a graph of the open circuit voltage of an air cell assembled from precursor catalysts prepared in example 4;
FIG. 11 is the CuO @ Co prepared in example 23O4A nanoparticle assembled air cell operating voltage plot;
fig. 12 is a graph of the operating voltage of an air battery assembled with the precursor catalyst prepared in example 4.
Detailed Description
The terms as used herein:
"prepared from … …" is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of … …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of … …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when the range "1 ~ 5" is disclosed, the ranges described should be construed to include the ranges "1 ~ 4", "1 ~ 3", "1 ~ 2 and 4 ~ 5", "1 ~ 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
In these examples, the parts and percentages are by mass unless otherwise indicated.
"part by mass" means a basic unit of measure indicating a mass ratio of a plurality of components, and 1 part may represent any unit mass, for example, 1g or 2.689 g. If we say that the part by mass of the component A is a part by mass and the part by mass of the component B is B part by mass, the ratio of the part by mass of the component A to the part by mass of the component B is a: b. alternatively, the mass of the A component is aK and the mass of the B component is bK (K is an arbitrary number, and represents a multiple factor). It is unmistakable that, unlike the parts by mass, the sum of the parts by mass of all the components is not limited to 100 parts.
"and/or" is used to indicate that one or both of the illustrated conditions may occur, e.g., a and/or B includes (a and B) and (a or B).
A preparation method of a magnesium air battery catalyst comprises the following steps:
mixing raw materials including copper nitrate, potassium citrate and potassium cobalt cyanide, and reacting to obtain a precursor;
carrying out heat treatment on the precursor to obtain CuO @ Co3O4And (3) nanoparticles.
Said CuO @ Co3O4The nano particles are the magnesium air battery catalyst.
In an alternative embodiment, the mixing comprises:
and mixing the aqueous solution of the copper nitrate and the aqueous solution of the potassium citrate to obtain a mixed solution, and then dropwise adding the aqueous solution of the potassium cobalt cyanide into the mixed solution.
In an alternative embodiment, the reaction is carried out under agitation;
in an alternative embodiment, the time of stirring is 10-30 min;
optionally, the stirring time may be any value between 10min, 20min, 30min or 10-30 min.
In an alternative embodiment, the stirring is followed by aging;
in an alternative embodiment, the aging time is from 20 to 24 hours;
alternatively, the aging time may be 20h, 21h, 22h, 23h, 24h or any value between 20 and 24 h.
In an alternative embodiment, the aging further comprises, after the aging: carrying out solid-liquid separation on the reaction system to obtain a solid, and drying to obtain Cu3[Co(CN)6]2·9H2O is the precursor;
in an alternative embodiment, the drying temperature is 60-80 ℃ and the drying time is 20-24 h;
in an alternative embodiment, the precursor has an overall cubic shape with dimensions of 1-2 μm.
Optionally, the drying temperature may be any value between 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃ or 60-80 ℃, and the time may be any value between 20h, 21h, 22h, 23h, 24h or 20-24 h.
In an alternative embodiment, the heat treatment comprises:
calcining the precursor at the temperature of 900 ℃ for 1-5h, and cooling to obtain the CuO @ Co3O4A nanoparticle;
in an alternative embodiment, the heat treatment has a ramp rate of 1-10 ℃/min;
in an alternative embodiment, the CuO @ Co3O4The size of the nanoparticles is 100-500 nm.
Optionally, the calcination temperature may be any value between 300 ℃, 400 ℃, 500 ℃, 600 ℃, 700 ℃, 800 ℃, 900 ℃ or 300 and 900 ℃, and the time may be any value between 1h, 2h, 3h, 4h, 5h or 1-5 h; the heating rate of the heat treatment can be any value of 1 ℃/min, 2 ℃/min, 3 ℃/min, 4 ℃/min, 5 ℃/min, 6 ℃/min, 7 ℃/min, 8 ℃/min, 9 ℃/min, 10 ℃/min or 1-10 ℃/min; said CuO @ Co3O4The size of the nanoparticles is any value between 100nm, 200nm, 300nm, 400nm, 500nm or 100-500 nm.
The application also provides a magnesium air battery catalyst, which is prepared by using the preparation method of the magnesium air battery catalyst.
The application also provides an air cathode of the magnesium-air battery, which comprises the magnesium-air battery catalyst.
The application also provides a preparation method of the air cathode of the magnesium air battery, which comprises the following steps:
mixing raw materials including the magnesium air battery catalyst, a binder, a pore-forming agent, a conductive agent and an organic solvent to obtain slurry;
and coating the slurry on a pole piece, and drying to obtain the air cathode of the magnesium air battery.
In an alternative embodiment, the conductive agent comprises carbon black;
in an alternative embodiment, the pole piece comprises hydrophobic conductive carbon paper.
The application also provides a magnesium air battery, which comprises the air cathode of the magnesium air battery.
The application also provides electric equipment comprising the magnesium air battery.
Embodiments of the present application will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
Magnesium air battery catalyst (CuO @ Co)3O4Nano particles), the synthesis step is divided into two parts of (A) preparation of the precursor and (B) sintering of the precursor.
(A) Preparing a precursor:
firstly, preparing 0.03mol/L copper nitrate uniform solution for later use.
Secondly, 9.0mmol of potassium citrate is weighed and added into 200mL of the copper nitrate solution prepared in the first step, and the mixture is stirred for 30 minutes by magnetic force at normal temperature to form a uniform mixed solution a.
Thirdly, preparing 200mL of 0.02mol/L uniform potassium cobalt cyanide solution as solution b.
And fourthly, slowly dropwise adding the solution b into the mixed solution a, magnetically stirring for 30 minutes to obtain a reaction solution, and aging the reaction solution at room temperature for 24 hours to obtain a precipitate.
Fifthly, centrifuging and washing the precipitate obtained in the fourth step for multiple times, and then drying the precipitate for 24 hours at 80 ℃ to obtain the precipitate with the cubic shape, the size of about 1 mu m and the chemical formula of Cu3[Co(CN)6]2·9H2Precursor of prussian blue analogue of O.
(B) Heat treatment of the precursor:
heating the precursor obtained in the above step to 400 ℃ at a heating rate of 5 ℃/min, calcining for 2 hours, and naturally cooling to room temperature to obtain CuO @ Co with the size of about 200nm3O4And (3) nanoparticles.
FIG. 1 is the CuO @ Co prepared in example 13O4XRD pattern of nanoparticles; FIG. 2 is the CuO @ Co prepared in example 13O4SEM image of nanoparticles.
The obtained CuO @ Co3O4The nano particles are used as a cathode catalyst of the magnesium air battery to carry out ORR electrochemical performance test, and the assembled magnesium air battery is subjected to discharge performance test, so that good ORR performance, stability, battery discharge voltage platform and energy density are obtained.
Example 2
CuO @ Co3O4The synthesis step of the nano-particles comprises two parts of (A) preparation of a precursor and (B) sintering of the precursor.
(A) Preparing a precursor:
firstly, preparing 0.03mol/L copper nitrate uniform solution for later use.
Secondly, 9.0mmol of potassium citrate is weighed and added into 200mL of the copper nitrate solution prepared in the first step, and the mixture is stirred for 30 minutes by magnetic force at normal temperature to form a uniform mixed solution a.
Thirdly, preparing 200mL of 0.02mol/L uniform potassium cobalt cyanide solution as solution b.
And fourthly, slowly dropwise adding the solution b into the mixed solution a, magnetically stirring for 30 minutes to obtain a reaction solution, and aging the reaction solution at room temperature for 24 hours to obtain a precipitate.
Fifthly, centrifuging and washing the precipitate obtained in the fourth step for multiple times, and then drying the precipitate for 24 hours at 80 ℃ to obtain the precipitate with the cubic shape, the size of about 1 mu m and the chemical formula of Cu3[Co(CN)6]2·9H2Precursor of prussian blue analogue of O.
(B) Heat treatment of the precursor:
heating the precursor obtained in the above step to 600 ℃ according to a heating rate of 5 ℃/min, calcining for 2 hours, and naturally cooling to room temperature to obtain CuO @ Co with the size of about 100nm3O4And (3) nanoparticles.
FIG. 3 is the CuO @ Co prepared in example 23O4XRD pattern of nanoparticles; FIG. 4 is the CuO @ Co prepared in example 23O4SEM image of nanoparticles.
The obtained CuO @ Co3O4The nano particles are used as a magnesium air battery cathode catalyst to carry out ORR electrochemical performance test, and the assembled magnesium air battery is subjected to discharge performance test, so that good ORR performance, stability, battery discharge voltage platform and energy density are obtained.
Example 3
CuO @ Co3O4The synthesis step of the nano-particles comprises two parts of (A) preparation of a precursor and (B) sintering of the precursor.
(A) Preparing a precursor:
firstly, preparing 0.03mol/L copper nitrate uniform solution for later use.
Secondly, 9.0mmol of potassium citrate is weighed and added into 200mL of the copper nitrate solution prepared in the first step, and the mixture is stirred for 30 minutes by magnetic force at normal temperature to form a uniform mixed solution a.
Thirdly, preparing 200mL of 0.02mol/L uniform potassium cobalt cyanide solution as solution b.
And fourthly, slowly dropwise adding the solution b into the mixed solution a, magnetically stirring for 30 minutes to obtain a reaction solution, and aging the reaction solution at room temperature for 24 hours to obtain a precipitate.
Fifthly, centrifuging and washing the precipitate obtained in the fourth step for multiple times, and then drying the precipitate for 24 hours at 80 ℃ to obtain the precipitate with the cubic shape, the size of about 1 mu m and the chemical formula of Cu3[Co(CN)6]2·9H2Precursor of prussian blue analogue of O.
(B) Heat treatment of the precursor:
heating the precursor obtained in the above step to 800 ℃ at a heating rate of 5 ℃/min, calcining for 2 hours, and naturally cooling to room temperature to obtain CuO @ Co with the size of about 500nm3O4And (3) nanoparticles.
FIG. 5 is the CuO @ Co prepared in example 33O4XRD pattern of nanoparticles; FIG. 6 is a drawing showing a preparation process of example 3Prepared CuO @ Co3O4SEM image of nanoparticles.
The obtained CuO @ Co3O4The nano particles are used as a magnesium air battery cathode catalyst to carry out ORR electrochemical performance test, and the assembled magnesium air battery is subjected to discharge performance test, so that good ORR performance, stability, battery discharge voltage platform and energy density are obtained.
Comparative example 1
Unlike example 1, step (B) was not performed.
The obtained Prussian blue analogue precursor is used as an oxygen reduction catalyst to carry out ORR electrochemical performance test, and is used as an air battery assembled by a magnesium air battery cathode catalyst to carry out discharge performance test.
FIG. 7 is an XRD spectrum of a Prussian blue analogue precursor prepared in comparative example 1; fig. 8 is an SEM image of the prussian blue analog precursor prepared in comparative example 1.
The CuO @ Co obtained in example 2 was added3O4The nano particles and the Prussian blue analogue precursor obtained in the comparative example 1 are respectively dissolved in an organic solvent together with a binder, a pore-forming agent and carbon black, the mixture is stirred for 24 hours to form uniform slurry, then the uniform slurry is coated on hydrophobic conductive carbon paper, the hydrophobic conductive carbon paper is dried to be used as an air cathode of the magnesium air battery, 3.5 wt% of NaCl is used as an electrolyte solution, and a magnesium alloy is used as an anode material to assemble the magnesium air battery.
The open circuit voltage and the operating voltage of the above two air batteries were measured, and fig. 9 is a graph of CuO @ Co prepared in example 23O4The open-circuit voltage of the air battery assembled by the catalyst is stabilized to about 1.76V after 30min of operation; fig. 10 shows the open circuit voltage of the air battery assembled by the precursor catalyst prepared in comparative example 1, which is only about 1.66V after 30min operation; FIG. 11 is the CuO @ Co prepared in example 23O4The operating voltage of the air battery assembled by the catalyst is 1.0 mA-cm-2After stable discharge for 56h under the current density, the working voltage of about 1.25V is still kept; FIG. 12 shows a preparation of comparative example 1The operating voltage of the air battery assembled by the precursor catalyst is 1.0 mA-cm-2The stable discharge can only reach about 1.19V after 56h under the current density. From the above comparison of the discharge properties of the air battery, it can be seen that CuO @ Co prepared in example 23O4The air battery assembled by the catalyst has more excellent discharge performance than the air battery assembled by the precursor catalyst prepared in the comparative example 1. This is due to the CuO @ Co prepared in example 23O4The catalyst has smaller grain size and larger specific surface area, and shows more excellent ORR performance in alkaline electrolyte and neutral electrolyte. Thus, the CuO @ Co prepared in example 23O4The air battery assembled by the catalyst has more excellent discharge performance.
The application provides a CuO @ Co3O4The nano particles and the preparation method thereof have the advantages of simple process and low cost, have excellent catalytic performance when used as a magnesium air battery cathode catalyst, and can effectively solve the technical problems of low catalytic activity and poor discharge performance of the conventional magnesium air battery cathode.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. A preparation method of a magnesium air battery catalyst is characterized by comprising the following steps:
mixing raw materials including copper nitrate, potassium citrate and potassium cobalt cyanide, and reacting to obtain a precursor;
carrying out heat treatment on the precursor to obtain CuO @ Co3O4And (3) nanoparticles.
2. The method of manufacturing of claim 1, wherein the mixing comprises:
and mixing the aqueous solution of the copper nitrate and the aqueous solution of the potassium citrate to obtain a mixed solution, and then dropwise adding the aqueous solution of the potassium cobalt cyanide into the mixed solution.
3. The production method according to claim 1, wherein the reaction is carried out under stirring;
preferably, the stirring time is 10-30 min;
preferably, the stirring is followed by aging;
preferably, the aging time is 20-24 h;
preferably, the aging process further comprises the following steps: carrying out solid-liquid separation on the reaction system to obtain a solid, and drying to obtain Cu3[Co(CN)6]2·9H2O is the precursor;
preferably, the drying temperature is 60-80 ℃, and the drying time is 20-24 h;
preferably, the precursor has an overall cubic shape with a size of 1 to 2 μm.
4. The production method according to any one of claims 1 to 3, wherein the heat treatment comprises:
calcining the precursor at the temperature of 900 ℃ for 1-5h, and cooling to obtain the CuO @ Co3O4A nanoparticle;
preferably, the heating rate of the heat treatment is 1-10 ℃/min;
preferably, said CuO @ Co3O4The size of the nanoparticles is 100-500 nm.
5. A magnesium air battery catalyst, characterized by being produced by the method for producing a magnesium air battery catalyst according to any one of claims 1 to 4.
6. An air cathode for a magnesium air battery, comprising the magnesium air battery catalyst according to claim 5.
7. A method for preparing an air cathode of a magnesium-air battery according to claim 6, comprising:
mixing raw materials including the magnesium air battery catalyst, a binder, a pore-forming agent, a conductive agent and an organic solvent to obtain slurry;
and coating the slurry on a pole piece, and drying to obtain the air cathode of the magnesium air battery.
8. The production method according to claim 7, wherein the conductive agent comprises carbon black;
preferably, the pole piece comprises hydrophobic conductive carbon paper.
9. A magnesium air battery comprising the air cathode of the magnesium air battery according to claim 6.
10. An electric device comprising the magnesium-air battery according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111114979.1A CN113851663B (en) | 2021-09-23 | 2021-09-23 | Magnesium air battery catalyst, magnesium air battery air cathode and preparation method thereof, magnesium air battery and electric equipment |
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