CN117238680A - Graphene oxide/polypyrrole composite electrode material and preparation method and application thereof - Google Patents
Graphene oxide/polypyrrole composite electrode material and preparation method and application thereof Download PDFInfo
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The application provides a graphene oxide/polypyrrole composite electrode material, and a preparation method and application thereof, and belongs to the technical field of super capacitors and electrode materials. The preparation method takes graphene oxide and polypyrrole as raw materials, and adopts a method without reduction treatment to prepare the composite material as the electrode material of the super capacitor; by adding a proper amount of oxidant, catalyst and stabilizer in the in-situ polymerization reaction, the simultaneous oxidation and polymerization of graphene oxide and pyrrole monomers are realized, the cost increase and environmental pollution caused by using a reducing agent are avoided, and the high purity and high conductivity of the graphene oxide in the composite material are ensured. The super capacitor prepared by the composite electrode material has the advantages of high specific capacitance, high power density, high cycle stability and the like, can effectively store and release instantaneous high-power energy, can be widely applied to the scenes of starting, accelerating, braking and the like of the electric automobile, and improves the performance and the safety of the electric automobile.
Description
Technical Field
The application belongs to the technical field of super capacitors and electrode materials, and particularly relates to a graphene oxide/polypyrrole composite electrode material, and a preparation method and application thereof.
Background
The super capacitor is a novel energy storage device, has the advantages of high charge and discharge speed, long cycle life, high power density and the like, and is suitable for storing and releasing instantaneous high-power energy, such as the scenes of starting, accelerating, braking and the like of an electric automobile. The performance of a supercapacitor is mainly dependent on the characteristics of its electrode material, such as conductivity, specific surface area, pore structure, chemical stability, etc. Currently, common supercapacitor electrode materials include carbon materials such as activated carbon, carbon nanotubes and graphene, and pseudocapacitance materials such as metal oxides and conductive polymers.
Graphene is a single layer sp 2 Two-dimensional nanomaterial comprising bonded carbon atoms having high conductivity and high specific surface area (about 2600 m 2 Excellent physicochemical properties such as high mechanical strength (about 130 GPa), and high elastic modulus (about 1 TPa). Therefore, graphene is considered as an ideal supercapacitor electrode material, which can provide high specific capacitance and high power density. However, graphene also has some performance drawbacksSuch as pi-pi stacking between sheets, resulting in a decrease in specific surface area, insufficient pore structure, such that ion transport is hindered, lack of surface functional groups, resulting in poor hydrophilicity, etc.
Polypyrrole is a conductive polymer and has the advantages of good pseudocapacitance characteristic, low cost, easy synthesis and the like. Polypyrrole can store and release charges on its molecular chain through oxidation-reduction reaction, thereby increasing the energy density of the supercapacitor. Likewise, polypyrroles have some performance drawbacks such as lower conductivity, unstable structure, shorter cycle life, etc.
In order to overcome the defects of the materials and improve the comprehensive performance of the supercapacitor, one feasible method is to compound graphene and polypyrrole to form a novel composite material. The composite material can utilize the interaction and synergistic effect between graphene and polypyrrole to improve the characteristics of conductivity, specific surface area, pore structure, chemical stability, hydrophilicity and the like of the composite material, so that the indexes of specific capacitance, power density, cycling stability and the like of the supercapacitor are improved.
Currently, there have been some studies on graphene/polypyrrole composite materials as supercapacitor electrode materials, such as: dispersing graphene oxide in water, adding pyrrole monomers, and performing ultrasonic treatment to obtain graphene oxide/pyrrole monomer mixed solution; pouring the mixed solution into a porous aluminum plate, and vacuum drying to obtain a graphene oxide/polypyrrole composite material film; and (3) carrying out reduction treatment on the composite material film in an inert atmosphere to obtain the graphene/polypyrrole composite material film. Such as: dispersing graphene oxide in water, adding a silver ion solution, and performing ultrasonic treatment to obtain a graphene oxide/silver ion mixed solution; pouring the mixed solution into a porous aluminum plate, and vacuum drying to obtain a graphene oxide/silver nanowire composite material film; carrying out reduction treatment on the composite material film in an inert atmosphere to obtain a graphene/silver nanowire composite material film; and immersing the composite material film in a solution containing pyrrole monomers and an oxidant, and performing electrochemical polymerization to obtain the polypyrrole nanotube super capacitor electrode material taking graphene as a substrate. Such as: dispersing the three-dimensional porous carbon support in water, adding an oxidant and an pyrrole monomer, and performing ultrasonic treatment to obtain a three-dimensional porous carbon support/pyrrole monomer mixed solution; pouring the mixed solution into a porous aluminum plate, and carrying out vacuum drying to obtain a three-dimensional porous carbon support/polypyrrole composite material film; and immersing the composite material film in a solution containing a reducing agent, and carrying out reduction treatment to obtain the graphene/polypyrrole composite material based on three-dimensional porous carbon support. However, these techniques still suffer from the following disadvantages:
1. graphene oxide is used as a raw material, and graphene can be obtained through reduction treatment in the follow-up process, and a large amount of reducing agent is consumed in the process (not only the cost is increased, but also the environmental pollution is caused); in addition, residual unreduced oxides or reducing agents affect the conductivity and stability of the composite.
2. Only porous aluminum plates and the like are used as templates, the pore structures which can be provided by the porous aluminum plates are very limited, and the improvement of the porosity and specific surface area of the composite material is limited, so that the ion transmission efficiency is still limited.
3. Polypyrrole is used as a pseudocapacitance material, the structure of the pseudocapacitance material is unstable, oxidative degradation or crosslinking reaction is easy to occur, and the cycling stability of the composite material is reduced.
Disclosure of Invention
Aiming at the defects and shortcomings of the existing graphene/polypyrrole composite material serving as a supercapacitor electrode material in the background art, the application aims to provide a graphene oxide/polypyrrole composite electrode material and a preparation method and application thereof. The application overcomes the performance defect of the electrode material used in the super capacitor in the prior art, improves the specific surface area, ion transmission efficiency, power density, cycling stability and the like of the composite material, and simultaneously effectively reduces the manufacturing cost.
In order to achieve the above purpose, the present application adopts the following technical scheme:
the application provides a preparation method of a graphene oxide/polypyrrole composite electrode material, which comprises the following steps:
step one, mixing graphene oxide with pyrrole monomer, adding oxidant, catalyst and stabilizer, and stirring uniformly to obtain graphene oxide/pyrrole monomer mixed solution;
and secondly, pouring the mixed solution into a microporous template, and stripping after polymerization of graphene oxide and pyrrole monomers to obtain the graphene oxide/polypyrrole composite electrode material.
Preferably, the mass ratio of the graphene oxide to the pyrrole monomer in the step one is (0.5-2): 1.
Preferably, the oxidizing agent in step one includes, but is not limited to, any one or more of hydrogen peroxide, sodium persulfate, potassium persulfate, ammonium persulfate, and benzoyl peroxide.
The oxidant is used for promoting simultaneous oxidation and polymerization of graphene oxide and pyrrole monomers, so that the composite electrode material film containing graphene oxide and polypyrrole is obtained. The oxidant can provide active oxygen species, such as hydroxyl free radicals, peroxy free radicals and the like, and the active oxygen species can react with graphene oxide and pyrrole monomers to enable the graphene oxide and the pyrrole monomers to be in an oxidation state, so that reduction treatment is not needed, charge transfer and conjugation effects between the graphene oxide and the pyrrole monomers are increased, and the conductivity of the composite material is improved. Meanwhile, the active oxygen species can promote the polymerization reaction between pyrrole monomers, so that polypyrrole forms a structure such as a nanotube or a nanorod which is matched with the pore diameter in a template hole, and the porosity and the specific surface area of the composite material are increased.
Preferably, the catalyst of step one includes, but is not limited to, any one or more combinations of iron salts, copper salts, cobalt salts, nickel salts, and manganese salts.
The catalyst has the functions of accelerating the simultaneous oxidation and polymerization reaction of graphene oxide and pyrrole monomers, so that the preparation time is shortened, and the preparation efficiency is improved. The catalyst can provide metal ions or metal complexes and the like, and the metal ions or the metal complexes can form coordination bonds or covalent bonds and the like with graphene oxide and pyrrole monomers, so that the reaction activation energy is reduced, and the reaction rate is increased. Meanwhile, the metal ions or metal complexes can also form complexes or coordination bonds with the active oxygen species, so as to stabilize the active oxygen species from premature consumption or decomposition.
Preferably, the stabilizer in the step one includes, but is not limited to, any one or more of polyvinylpyrrolidone, polyvinyl alcohol, polyacrylic acid and polyethylene glycol.
The stabilizer is used for controlling the oxidation degree and the molecular weight of the graphene oxide and the polypyrrole, so that excessive oxidation or crosslinking of the polypyrrole is avoided, and the pseudo-capacitance characteristic of the polypyrrole in the composite material is ensured. The stabilizer can provide high molecular chains or polar groups and the like, and the high molecular chains or polar groups can form physical adsorption or weak interaction with the graphene oxide and the polypyrrole, so that the reaction of active oxygen species with the graphene oxide and the polypyrrole is hindered, the oxidation degree of the active oxygen species and the graphene oxide is reduced, and the conductivity and pseudocapacitance of the active oxygen species and the polypyrrole are maintained. Meanwhile, the high molecular chain or polar group can also prevent the crosslinking reaction between polypyrrole molecular chains, control the molecular weight and keep the structural stability and the circulation stability.
Preferably, in the first step, the addition amount of the oxidant, the catalyst and the stabilizer accounts for 1-10% of the total mixed mass of the graphene oxide and the pyrrole monomer; the mass ratio of the oxidant to the catalyst to the stabilizer is (1-2) (0.5-1) (1-2), so that the efficiency and the quality of simultaneous oxidation and polymerization of graphene oxide and pyrrole monomers can be ensured, and excessive oxidation or crosslinking of polypyrrole and excessive accumulation or dispersion of graphene oxide are avoided.
Preferably, the pore diameter of the second microporous template is 1-100 mu m, and the porosity is 10% -90%; the polymerization time was 1 to 24 and h.
In-situ polymerization is carried out on graphene oxide and pyrrole monomers in a micropore template: in one aspect, polypyrrole has an adjustable pore structure that can provide a multi-stage pore path for the composite material; on the other hand, polypyrrole can form a nano tube or nano rod structure matched with the pore diameter of the template by in-situ polymerization reaction in the template pores, so that the porosity and specific surface area of the composite material are increased. The existing preparation process is to mix graphene oxide and pyrrole monomers, and then to perform electrostatic spinning or dipping on a porous aluminum plate or a stainless steel plate to obtain a fiber or film containing graphene oxide and polypyrrole. In the process, polypyrrole does not undergo in-situ polymerization reaction in the template pores, but forms a fiber or film structure which is randomly distributed outside, so that the polypyrrole cannot be matched with the template pore diameter, and cannot form multistage pore channels, and the porosity and the specific surface area of the composite material are limited. Therefore, the composite material prepared by the application has more excellent pore structure and specific surface area compared with the composite material prepared by the prior art.
The application also provides application of the graphene oxide/polypyrrole composite electrode material in preparation of high-performance super capacitors of electric automobiles.
Preferably, the super capacitor comprises two oppositely arranged electrodes and an isolating layer, wherein each electrode comprises a current collector and a carrier loaded with the graphene oxide/polypyrrole composite electrode material;
the preparation method of the super capacitor comprises the following steps: loading graphene oxide/polypyrrole composite electrode materials on a carrier, connecting the carrier with a current collector to prepare electrodes, and assembling the two electrodes and an isolating layer in a way of opposite arrangement to form a supercapacitor;
wherein the carrier comprises any one of stainless steel mesh, copper mesh, nickel mesh, aluminum mesh or carbon fiber cloth; the current collector includes, but is not limited to, any one of stainless steel foil, copper foil, nickel foil, aluminum foil, or carbon paper; the separator layer includes, but is not limited to, any one of a polypropylene film, a polytetrafluoroethylene film, a polyethylene film, or a cellulose paper.
Compared with the prior art, the application has the beneficial effects that:
1. the super capacitor prepared by the application has the advantages of high specific capacitance, high power density, high cycle stability and the like, can effectively store and release instantaneous high-power energy, can be widely applied to the scenes of starting, accelerating, braking and the like of the electric automobile, and improves the performance and the safety of the electric automobile.
2. The application adopts the composite material constructed by the graphene oxide and the polypyrrole as the electrode material, and utilizes the strong pi-pi interaction and hydrogen bond interaction between the graphene oxide and the polypyrrole to improve the characteristics of the composite material such as conductivity, specific surface area, pore structure, chemical stability, hydrophilicity and the like, thereby improving the indexes such as specific capacitance, power density, cycling stability and the like of the super capacitor.
3. According to the preparation method, the composite material is prepared by using a method without reduction treatment, and the graphene oxide and pyrrole monomers are oxidized and polymerized simultaneously by adding a proper amount of oxidant, catalyst and stabilizer in an in-situ polymerization reaction, so that the cost increase and environmental pollution caused by using the reducer are avoided, and the high purity and high conductivity of the graphene oxide in the composite material are ensured. The process method not only improves the quality and performance of the composite material, but also accords with the principle of green chemistry, saves resources and protects the environment.
4. The composite material prepared by the application is used as an electrode material, so that a double-layer capacitor or a pseudo capacitor with high energy density and high power density can be provided, and the coupling of the double-layer capacitor and the pseudo capacitor can be realized by adjusting the proportion and the structure of the composite material, so that a novel hybrid supercapacitor is formed. The hybrid super capacitor has the advantages of double-layer capacitor and pseudo capacitor, realizes the balance of high energy density and high power density, and meets the requirements of different scenes.
Drawings
FIG. 1 is a microstructure of the composite electrode material prepared in example 1 of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
A preparation method of a graphene oxide/polypyrrole composite electrode material comprises the following steps:
1. graphene oxide (specific surface area 300 m) 2 /g) and pyrrole monomer (purity 99%) in mass ratio 1:1 to give a 10 g mixture.
2. The mixture was added to 100 mL water and stirred well to give a 10% strength mixed solution.
3. To the mixed solution, 0.5% g hydrogen peroxide solution (mass fraction: 30%), 0.1% g iron salt (FeCl) 3 ·6H 2 O) and 0.2. 0.2 g (molecular weight 10000), and continuously stirring uniformly to obtain graphene oxide/pyrrole monomer mixed solution.
4. Pouring the graphene oxide/pyrrole monomer mixed solution into a porous aluminum plate (aperture 10 μm, porosity 50%) with a microporous structure, standing for 12 hours under normal pressure, and carrying out polymerization reaction on the graphene oxide and pyrrole monomer in the pores of the porous aluminum plate to obtain the film.
5. And (3) stripping the film from the porous aluminum plate, and cleaning with water and an ethanol solvent to obtain the graphene oxide/polypyrrole composite electrode material.
Example 2
A preparation method of a graphene oxide/polypyrrole composite electrode material comprises the following steps:
1. graphene oxide (specific surface area 300 m) 2 /g) and pyrrole monomer (purity 99%) in mass ratio 1:2 to give a 10 g mixture.
2. The mixture was added to 100 mL water and stirred well to give a 10% strength mixed solution.
3. To the mixed solution were added 0.4. 0.4 g of potassium persulfate and 0.15. 0.15 g of iron salt (FeSO 4 ·7H 2 And O) and polyethylene glycol (molecular weight 400) of 0.25 and g, and continuously stirring uniformly to obtain graphene oxide/pyrrole monomer mixed solution.
4. Pouring the graphene oxide/pyrrole monomer mixed solution into a porous aluminum plate (aperture 10 μm, porosity 50%) with a microporous structure, standing for 12 hours under normal pressure, and carrying out polymerization reaction on the graphene oxide and pyrrole monomer in the pores of the porous aluminum plate to obtain the film.
5. And (3) stripping the film from the porous aluminum plate, and cleaning with water and an ethanol solvent to obtain the graphene oxide/polypyrrole composite electrode material.
Example 3
A preparation method of a graphene oxide/polypyrrole composite electrode material comprises the following steps:
1. graphene oxide (specific surface area 300 m) 2 And pyrrole monomer (purity 99%) in mass ratio 2:1 to give a 10 g mixture.
2. The mixture was added to 100 mL water and stirred well to give a 10% strength mixed solution.
3. To the mixed solution were added 0.16. 0.16 g of sodium peroxyacetate, 0.08. 0.08 g of copper salt (CuSO 4 ·7H 2 O) and 0.12. 0.12 g (molecular weight 10000), and continuously stirring uniformly to obtain graphene oxide/pyrrole monomer mixed solution.
4. Pouring the graphene oxide/pyrrole monomer mixed solution into a porous aluminum plate (aperture 10 μm, porosity 50%) with a microporous structure, standing for 12 hours under normal pressure, and carrying out polymerization reaction on the graphene oxide and pyrrole monomer in the pores of the porous aluminum plate to obtain the film.
5. And (3) stripping the film from the porous aluminum plate, and cleaning with water and an ethanol solvent to obtain the graphene oxide/polypyrrole composite electrode material.
Comparative example 1
This comparative example refers to the procedure parameters of example 1, except that no hydrogen peroxide solution was added in step 3.
Comparative example 2
This comparative example refers to the procedure parameters of example 1, except that no polyvinylpyrrolidone was added in step 3.
Comparative example 3
The comparative example refers to the step parameters of example 1, except that step 1 was adjusted to take graphene oxide (specific surface area 300 m 2 Mixing/g) and pyrrole monomer (purity 99%) in a mass ratio of 4:1 gives a 10 g mixture.
Test examples
The composite electrode materials prepared in the above examples and comparative examples were subjected to performance tests, respectively:
conductivity: the conductivity of the composite electrode material was measured using a four-probe method. The method comprises the following specific steps: cutting a composite electrode material into a strip-shaped sample with the length of 10 cm and the width of 1 cm, contacting four equidistant metal probes with the surface of the sample, respectively connecting a constant current source and a millivoltmeter, measuring the voltage difference between two ends of the sample, and calculating the resistivity and the conductivity of the sample according to a formula. The test conditions were: the constant current source output current was 10 mA, the probe spacing was 1 cm, and the ambient temperature was 25 ℃.
Specific surface area: the specific surface area of the composite electrode material was measured using a specific surface area meter. The method comprises the following specific steps: cutting the composite electrode material into small pieces, placing the small pieces into a sample cell of a specific surface area meter, using nitrogen as adsorption gas, measuring the adsorption quantity of the sample to the nitrogen at a certain temperature and pressure, and calculating the specific surface area of the sample according to the Bruno-Emmett-Teller (BET) theory. The test conditions were: the temperature is 77K, the pressure is 0.01-0.3 atm, and the purity of nitrogen is 99.999%.
Porosity: the microstructure of the composite electrode material was observed using a scanning electron microscope and its porosity was calculated using image analysis software. The method comprises the following specific steps: cutting the composite electrode material into small pieces, coating a layer of metal on the surface of the composite electrode material by using a metal coating instrument, then shooting images of the cross section and the surface of the composite electrode material by using a scanning electron microscope under different magnification, introducing the images into image analysis software, distinguishing pores from solid phases according to brightness and contrast in the images, and calculating the area proportion of the pores and the solid phases, thereby obtaining the porosity. The test conditions were: the metal coating instrument uses silver as a coating material, and has a thickness of 10 nm; the scanning electron microscope uses acceleration voltage of 10 kV and magnification of 1000-10000 times; image analysis software uses ImageJ or MATLAB software tools, etc. Fig. 1 is a microstructure of the composite electrode material prepared in example 1.
Chemical stability (cycle retention):
composite electrode material prepared in the above examples and comparative examplesLoaded respectively at a thickness of 0.5 mm and an area of 5 cm 2 And a stainless steel net with a thickness of 0.1 mm and an area of 5 cm 2 Is connected with the stainless steel foil to manufacture an electrode; two electrodes are combined with a metal electrode having a thickness of 0.2 mm and an area of 5 cm 2 The polypropylene isolating layers are oppositely arranged and fixed by conductive adhesive, and the super capacitor is assembled.
Charging and discharging the super capacitor in 6M KOH solution (voltage 0-1.5V, time 0-10 s; charging process 0-5 s, discharging process 5-10 s, power density of kW/kg); and (3) continuously performing a cycle stability test in a 6M KOH solution (the cycle times are 0-1000 times, recording the specific capacitance of the first cycle and the specific capacitance after the 1000 th cycle, and calculating the cycle retention rate).
Hydrophilicity (contact angle): the contact angle of the composite electrode material with the water drop was measured using a contact angle meter.
The test results are shown in Table 1.
TABLE 1
As can be seen from the test results, the conductivity of the composite electrode material prepared by the embodiment of the application is far higher than that of the comparative example; the specific surface areas of the composite electrode materials prepared in the embodiment are all close to 1000 m 2 And/g, wherein the porosity is close to 80%, which indicates that the composite electrode material has a multi-stage pore structure; the composite electrode material has high cycle retention rate, which indicates that the composite electrode material has excellent chemical stability and cycle stability; the contact angle between the composite electrode material and water drops is small, which indicates that the composite electrode material has higher hydrophilicity and can be fully contacted and wetted with electrolyte.
Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the application, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the application, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the application.
Claims (10)
1. The preparation method of the graphene oxide/polypyrrole composite electrode material is characterized by comprising the following steps of:
step one, mixing graphene oxide with pyrrole monomer, adding oxidant, catalyst and stabilizer, and stirring uniformly to obtain graphene oxide/pyrrole monomer mixed solution; wherein the mass ratio of the oxidant to the catalyst to the stabilizer is (1-2) (0.5-1) (1-2);
and secondly, pouring the mixed solution into a microporous template, and directly stripping the polymerized graphene oxide and pyrrole monomer without reduction treatment to obtain the graphene oxide/polypyrrole composite electrode material.
2. The method for preparing a graphene oxide/polypyrrole composite electrode material according to claim 1, wherein the mass ratio of graphene oxide to pyrrole monomer in the step one is (0.5-2): 1.
3. The method of preparing a graphene oxide/polypyrrole composite electrode material according to claim 1, wherein the oxidizing agent in step one includes, but is not limited to, any one or more of hydrogen peroxide, sodium persulfate, potassium persulfate, ammonium persulfate, and benzoyl peroxide.
4. The method of preparing a graphene oxide/polypyrrole composite electrode material according to claim 1, wherein the catalyst in step one includes any one or more of a combination of iron salt, copper salt, cobalt salt, nickel salt and manganese salt.
5. The method of preparing a graphene oxide/polypyrrole composite electrode material according to claim 1, wherein the stabilizer in step one includes, but is not limited to, any one or more of polyvinylpyrrolidone, polyvinyl alcohol, polyacrylic acid, and polyethylene glycol.
6. The preparation method of the graphene oxide/polypyrrole composite electrode material according to claim 1, wherein the total addition amount of the oxidant, the catalyst and the stabilizer in the first step accounts for 1-10% of the total mixed mass of graphene oxide and pyrrole monomers.
7. The preparation method of the graphene oxide/polypyrrole composite electrode material according to claim 1, wherein the pore diameter of the second microporous template is 1-100 μm, and the porosity is 10% -90%; the polymerization time was 1 to 24 and h.
8. The graphene oxide/polypyrrole composite electrode material prepared by the method of any one of claims 1-7.
9. Use of the graphene oxide/polypyrrole composite electrode material according to claim 8 in the preparation of high-performance super capacitors of electric automobiles.
10. The use according to claim 9, wherein the supercapacitor comprises two oppositely arranged electrodes and an isolating layer, each electrode comprising a current collector and a carrier carrying the graphene oxide/polypyrrole composite electrode material;
the preparation method of the super capacitor comprises the following steps: loading graphene oxide/polypyrrole composite electrode materials on a carrier, connecting the carrier with a current collector to prepare electrodes, and assembling the two electrodes and an isolating layer in a way of opposite arrangement to form a supercapacitor;
wherein the carrier comprises any one of stainless steel mesh, copper mesh, nickel mesh, aluminum mesh or carbon fiber cloth; the current collector includes, but is not limited to, any one of stainless steel foil, copper foil, nickel foil, aluminum foil, or carbon paper; the separator layer includes, but is not limited to, any one of a polypropylene film, a polytetrafluoroethylene film, a polyethylene film, or a cellulose paper.
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