CN109830726B - Polyelectrolyte membrane for new energy automobile fuel cell and preparation method thereof - Google Patents
Polyelectrolyte membrane for new energy automobile fuel cell and preparation method thereof Download PDFInfo
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Abstract
The invention provides a preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell, which comprises the following steps: preparing 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole, (II) preparing polymerized cyclobutyl substituted imidazole salt, (III) preparing polyelectrolyte membrane material, and (IV) ion exchange. The invention also discloses the polyelectrolyte membrane for the new energy automobile fuel cell prepared by the preparation method. The polyelectrolyte membrane for the new energy automobile fuel cell disclosed by the invention has the advantages of low preparation cost, good mechanical property, weather resistance, alkali resistance, excellent chemical stability and high ionic conductivity.
Description
Technical Field
The invention belongs to the technical field of new energy automobiles, relates to a new energy automobile fuel cell component, and particularly relates to a polyelectrolyte membrane for a new energy automobile fuel cell and a preparation method thereof.
Background
With the development of economy and the progress of global industrialization, environmental problems and energy problems become more severe, which bring resistance to the progress of society, and are problems that people have to face and need to be solved urgently. To solve these problems fundamentally, it is necessary to find the root cause of these problems, among which automobiles are one of the root causes. The traditional automobile needs to consume gasoline resources, and exhaust gas can cause serious air pollution, so that the development of a clean, pollution-free and energy-saving new energy automobile is imperative.
Vehicles driven by new energy sources other than the traditional energy sources can be called new energy vehicles, and the new energy vehicles are various in types, wherein fuel cell vehicles have the advantages of long cycle life, high energy efficiency, low initial investment cost, low operation and maintenance cost, environmental friendliness, short response time, long duration time and the like, and are attracted by attention in the industry. The power battery of the automobile is a fuel battery, the polyelectrolyte membrane is one of the key components of the automobile, the polyelectrolyte membrane plays roles in isolating fuel and transferring ions, and the performance of the polyelectrolyte membrane directly influences the cycle service life and the working stability of the fuel battery, so that the normal work of the new energy automobile is influenced. Therefore, the development of a polyelectrolyte membrane for a new energy automobile fuel cell with excellent performance is a hot spot of research in recent years.
The polyelectrolyte membrane is divided into a proton exchange membrane and an anion exchange membrane according to the different types of transferred ions, and the anion exchange membrane can effectively prevent the permeation of protons due to the repulsion effect between groups with positive charges and the protons, so that the self-discharge effect caused by the mutual cross contamination of electrolytes on two sides of the membrane is fundamentally prevented, and more attention is paid in recent years. However, most of traditional anion exchange membranes are prepared from quaternary ammonium salt polymers, and during the preparation process of the anion exchange membranes, a highly toxic substance, namely chloromethyl ether, is one of essential raw materials, so that the anion exchange membranes are harmful to human bodies and the environment, and are not environment-friendly.
Therefore, the development of the polyelectrolyte membrane for the new energy automobile fuel cell, which has good weather resistance and chemical stability, excellent mechanical property, high ionic conductivity and strong alkali resistance, has very important significance, and is a power source for promoting the development of the new energy automobile industry.
Disclosure of Invention
The invention mainly aims to provide a polyelectrolyte membrane for a new energy automobile fuel cell, which overcomes the technical problems of high cost, poor weather resistance and chemical stability and further improvement of mechanical property, ionic conductivity and alkali resistance of the traditional polyelectrolyte membrane, and has the advantages of low preparation cost, good mechanical property, weather resistance, alkali resistance, excellent chemical stability and high ionic conductivity.
In order to achieve the above purpose, the invention provides a preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell, which comprises the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 1-adamantane formaldehyde and a basic catalyst into a high-boiling-point solvent, stirring for 30-40 minutes at-20 to-40 ℃ under the atmosphere of nitrogen or inert gas, adding 2-fluoroimidazole, stirring for reacting for 4-6 hours, heating to room temperature, washing a product with water for 3-5 times, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding the 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into dichloromethane, stirring and reacting for 6-8 hours at the temperature of 30-40 ℃, and then performing rotary evaporation to remove the dichloromethane to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing the polymerized cyclobutyl substituted imidazole salt prepared in the step II, N-vinyl o-phenylimine, 3- (4-fluorophenyl) -2-acrylonitrile, 1, 8-divinyl perfluorooctane and an initiator, performing ultrasonic treatment for 15-20 minutes, adding the mixture into a mold, and irradiating the mold for 40-50 minutes under the ultraviolet light with the wavelength of 200-250nm in the nitrogen atmosphere to obtain a polyelectrolyte membrane material;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in 0.5-1mol/LKOH solution at 50-60 ℃ for 30-40 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
Preferably, the mass ratio of the 1-adamantane formaldehyde, the basic catalyst, the high-boiling-point solvent and the 2-fluoroimidazole in the step I is 1.91 (0.5-0.8) to 1 (10-15).
Preferably, the high boiling point solvent is selected from one or more of N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.
Preferably, the alkaline catalyst is selected from one or more of potassium tert-butyl alkoxide, sodium hydride, lithium boronate and trisodium boronate.
Preferably, the inert gas is selected from one of helium, neon and argon.
Preferably, the mass ratio of the 1-adamantyl hydroxy substituted methyl-2-fluoroimidazole, the 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane and the dichloromethane in the step II is 1.36:1 (10-15).
Preferably, the mass ratio of the polymerized cyclobutyl substituted imidazole salt, the N-vinyl o-phthalimide, the 3- (4-fluorophenyl) -2-acrylonitrile, the 1, 8-bisvinyl perfluorooctane and the initiator in the step III is 1:0.2:0.5:0.1 (0.01-0.03).
Preferably, the initiator is selected from one or more of benzoin ethyl ether, benzoin dimethyl ether, benzoin isopropyl ether and benzoin butyl ether.
Further, the polyelectrolyte membrane for the new energy automobile fuel cell is prepared by the preparation method of the polyelectrolyte membrane for the new energy automobile fuel cell.
Due to the application of the technical scheme, the invention has the following beneficial effects:
(1) the polyelectrolyte membrane for the new energy automobile fuel cell disclosed by the invention is simple and easy to prepare, low in equipment dependence, mild in reaction condition, easy to obtain raw materials and strong in practicability.
(2) The polyelectrolyte membrane for the new energy automobile fuel cell disclosed by the invention overcomes the technical problems that the traditional polyelectrolyte membrane is more or less high in cost, poor in weather resistance and chemical stability, and the mechanical property, the ionic conductivity and the alkali resistance need to be further improved, and has the advantages of low preparation cost, good mechanical property, weather resistance, alkali resistance, excellent chemical stability and high ionic conductivity.
(3) According to the polyelectrolyte membrane for the new energy automobile fuel cell, disclosed by the invention, 1-adamantane formaldehyde reacts with 2-fluoroimidazole, and meanwhile, adamantane and hydroxyl are introduced to an imidazole ring, so that the chemical stability, especially alkali resistance, of the imidazole ring is improved, and the mechanical property of the membrane is also improved; compared with the preparation method in the prior art (such as the preparation method of the exchange membrane disclosed in the Chinese invention patent CN 105694078A), the preparation method of the adamantane structure introduced by the method is simpler and more convenient, the yield is higher, and the problem of low conversion rate caused by large steric hindrance is solved; meanwhile, in the ionization stage, a fluorocyclobutane structure is introduced to the imidazole ring, so that the alkali resistance and the comprehensive performance of the imidazole ring are further improved.
(4) The polyelectrolyte membrane for the new energy automobile fuel cell disclosed by the invention is formed by copolymerizing N-vinyl o-phenyleneimine, 3- (4-fluorophenyl) -2-acrylonitrile and polymerized cyclobutyl substituted imidazolium salt, and the materials have the advantages of low cost, good rigidity and toughness balance, high atom utilization rate, long service life, good mechanical properties, weather resistance, alkali resistance, excellent chemical stability, high ionic conductivity and the like under the synergistic action of all structures.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
The raw materials used in the examples of the present invention were purchased from Mobei (Shanghai) Biotech limited.
Example 1
A preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell comprises the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 19.1g of 1-adamantanecarboxaldehyde and 5g of potassium tert-butoxide into 100g of N, N-dimethylformamide, stirring for 30 minutes at-20 ℃ in the nitrogen atmosphere, adding 10g of 2-fluoroimidazole, stirring for reaction for 4 hours, heating to room temperature, washing the product with water for 3 times, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding 13.6g of 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 10g of 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into 100g of dichloromethane, stirring and reacting for 6 hours at the temperature of 30 ℃, and then removing the dichloromethane by rotary evaporation to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing 10g of polymerized cyclobutyl substituted imidazole salt prepared in the step II, 2g of N-vinyl o-phthalimide, 5g of 3- (4-fluorophenyl) -2-acrylonitrile, 1g of 1, 8-divinyl perfluorooctane and 0.1g of benzoin ethyl ether, carrying out ultrasonic treatment for 15 minutes, adding the mixture into a mold, and irradiating the mold for 40 minutes under the ultraviolet light with the wavelength of 200nm in the nitrogen atmosphere to obtain a polyelectrolyte membrane material;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in 0.5mol/L KOH solution at 50 ℃ for 30 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
The polyelectrolyte membrane for the new energy automobile fuel cell is prepared by adopting the preparation method of the polyelectrolyte membrane for the new energy automobile fuel cell.
Example 2
A preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell comprises the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 19.1g of 1-adamantanecarboxaldehyde and 6g of sodium hydride into 110g of N, N-dimethylacetamide, stirring for 32 minutes at-25 ℃ under the atmosphere of helium, adding 10g of 2-fluoroimidazole, stirring for reacting for 4.5 hours, heating to room temperature, washing the product with water for 4 times, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding 13.6g of 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 10g of 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into 115g of dichloromethane, stirring and reacting for 6.5 hours at 33 ℃, and then removing the dichloromethane by rotary evaporation to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing 10g of polymerized cyclobutyl substituted imidazole salt prepared in the step II, 2g of N-vinyl o-phthalimide, 5g of 3- (4-fluorophenyl) -2-acrylonitrile, 1g of 1, 8-divinyl perfluorooctane and 0.15g of benzoin dimethyl ether, carrying out ultrasonic treatment for 16 minutes, adding the mixture into a mold, and irradiating the mold for 43 minutes under ultraviolet light with the wavelength of 215nm in the nitrogen atmosphere to obtain a polyelectrolyte membrane material;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in 0.6mol/L KOH solution at 53 ℃ for 33 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
The polyelectrolyte membrane for the new energy automobile fuel cell is prepared by adopting the preparation method of the polyelectrolyte membrane for the new energy automobile fuel cell.
Example 3
A preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell comprises the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 19.1g of 1-adamantanecarboxaldehyde and 6.5g of lithium boronate into 135g of N-methylpyrrolidone, stirring for 35 minutes at-30 ℃ under the atmosphere of neon, adding 10g of 2-fluoroimidazole, stirring for reacting for 5 hours, heating to room temperature, washing the product for 4 times with water, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding 13.6g of 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 10g of 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into 135g of dichloromethane, stirring and reacting for 7 hours at 36 ℃, and then removing dichloromethane by rotary evaporation to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing 10g of polymerized cyclobutyl substituted imidazole salt prepared in the step II, 2g of N-vinyl o-phthalimide, 5g of 3- (4-fluorophenyl) -2-acrylonitrile, 1g of 1, 8-divinyl perfluorooctane and 0.2g of benzoin isopropyl ether, carrying out ultrasonic treatment for 18 minutes, adding the mixture into a mold, and irradiating the mold for 46 minutes under the ultraviolet light with the wavelength of 235nm in the nitrogen atmosphere to obtain a polyelectrolyte membrane material;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in 0.8mol/L KOH solution at 56 ℃ for 37 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
The polyelectrolyte membrane for the new energy automobile fuel cell is prepared by adopting the preparation method of the polyelectrolyte membrane for the new energy automobile fuel cell.
Example 4
A preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell comprises the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 19.1g of 1-adamantane formaldehyde and 7.5g of basic catalyst into 142g of high-boiling-point solvent, stirring for 38 minutes at-35 ℃ under the argon atmosphere, adding 2-fluoroimidazole, stirring for reacting for 5.5 hours, raising the temperature to room temperature, washing the product for 5 times with water, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole; the high-boiling-point solvent is a mixture formed by mixing N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone according to a mass ratio of 2:1: 3; the alkaline catalyst is a mixture formed by mixing tert-butyl potassium alcoholate, sodium hydride, lithium boroxide and trisodium boride according to the mass ratio of 1:1:2: 3;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding 13.6g of 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 10g of 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into 145g of dichloromethane, stirring and reacting for 7.8 hours at 38 ℃, and then removing the dichloromethane by rotary evaporation to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing 10g of polymerized cyclobutyl substituted imidazole salt prepared in the step II, 2g of N-vinyl o-phthalimide, 5g of 3- (4-fluorophenyl) -2-acrylonitrile, 1g of 1, 8-divinyl perfluorooctane and 0.25g of initiator, performing ultrasonic treatment for 19 minutes, adding the mixture into a mold, and irradiating the mold under ultraviolet light with the wavelength of 245nm in a nitrogen atmosphere for 48 minutes to obtain a polyelectrolyte membrane material; the initiator is a mixture formed by mixing benzoin ethyl ether, benzoin dimethyl ether, benzoin isopropyl ether and benzoin butyl ether according to the mass ratio of 1:2:3: 5;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in 0.9mol/L KOH solution at 58 ℃ for 38 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
The polyelectrolyte membrane for the new energy automobile fuel cell is prepared by adopting the preparation method of the polyelectrolyte membrane for the new energy automobile fuel cell.
Example 5
A preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell comprises the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 19.1g of 1-adamantanecarboxaldehyde and 8g of trisodium boride into 150g of N, N-dimethylformamide, stirring for 40 minutes at-40 ℃ in the nitrogen atmosphere, adding 10g of 2-fluoroimidazole, stirring for reacting for 6 hours, heating to room temperature, washing the product with water for 5 times, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding 13.6g of 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 10g of 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into 150g of dichloromethane, stirring and reacting for 8 hours at 40 ℃, and then removing the dichloromethane by rotary evaporation to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing 10g of polymerized cyclobutyl substituted imidazole salt prepared in the step II, 2g of N-vinyl o-phthalimide, 5g of 3- (4-fluorophenyl) -2-acrylonitrile, 1g of 1, 8-divinyl perfluorooctane and 0.3g of benzoin butyl ether, carrying out ultrasonic treatment for 20 minutes, adding the mixture into a mold, and irradiating the mold for 50 minutes under the ultraviolet light with the wavelength of 250nm in the nitrogen atmosphere to obtain a polyelectrolyte membrane material;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in a 1mol/L KOH solution at 60 ℃ for 40 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
The polyelectrolyte membrane for the new energy automobile fuel cell is prepared by adopting the preparation method of the polyelectrolyte membrane for the new energy automobile fuel cell.
Comparative example
A membrane for fuel cell is prepared by the preparation method of embodiment 1 of Chinese invention patent CN 105914384A.
Meanwhile, in order to evaluate the specific technical effects of the membrane of the present invention, the specific properties of examples 1 to 5 and comparative example were tested in terms of ionic conductivity, tensile properties, alkali resistance, and the like, respectively. The conductivity was measured by a two-electrode AC impedance method at an electrochemical workstation (Zahner IM6EX), and the alkali resistance of the membrane was measured by immersing the membrane in 1mol/L KOH at 80 ℃ for 60 days and calculating the rate of change of conductivity. The tensile properties of the films were measured at 25 ℃ using a universal prototype (Instron Model 3365) at a tensile rate of 5 mm/min. Each sample was tested 3 times and an average was obtained. Specific test data are shown in table 1:
TABLE 1
| Group number | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Alkali resistance (%) | 0.83 | 0.75 | 0.69 | 0.61 | 0.50 | 1 |
| Conductivity (Scm)-1) | 0.0510 | 0.0580 | 0.0660 | 0.0740 | 0.0800 | 0.0290 |
| Tensile Strength (MPa) | 45 | 46 | 47 | 49 | 50 | 42 |
| Elongation at Break (%) | 215 | 222 | 229 | 232 | 236 | 190 |
As can be seen from Table 1, compared with the diaphragm for the fuel cell in the prior art, the polyelectrolyte membrane for the new energy automobile fuel cell prepared by the invention has obviously improved performance indexes in the aspects of ionic conductivity, tensile property, alkali resistance and the like, and meets the use requirements of the polyelectrolyte membrane for the new energy automobile fuel cell.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A preparation method of a polyelectrolyte membrane for a new energy automobile fuel cell is characterized by comprising the following steps:
preparation of I1-adamantyl hydroxy substituted methyl-2-fluoroimidazole: adding 1-adamantane formaldehyde and a basic catalyst into a high-boiling-point solvent, stirring for 30-40 minutes at-20 to-40 ℃ under the atmosphere of nitrogen or inert gas, adding 2-fluoroimidazole, stirring for reacting for 4-6 hours, heating to room temperature, washing a product with water for 3-5 times, and performing rotary evaporation to remove water to obtain 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole;
II preparation of polymerized cyclobutyl substituted imidazole salt: adding the 1-adamantyl hydroxyl substituted methyl-2-fluoroimidazole and 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinyl cyclobutane prepared in the step I into dichloromethane, stirring and reacting for 6-8 hours at the temperature of 30-40 ℃, and then performing rotary evaporation to remove the dichloromethane to obtain polymeric cyclobutyl substituted imidazole salt;
III, preparation of polyelectrolyte membrane material: uniformly mixing the polymerized cyclobutyl substituted imidazole salt prepared in the step II, N-vinyl o-phenylimine, 3- (4-fluorophenyl) -2-acrylonitrile, 1, 8-divinyl perfluorooctane and an initiator, performing ultrasonic treatment for 15-20 minutes, adding the mixture into a mold, and irradiating the mold for 40-50 minutes under the ultraviolet light with the wavelength of 200-250nm in the nitrogen atmosphere to obtain a polyelectrolyte membrane material;
IV, ion exchange: soaking the polyelectrolyte membrane material prepared in the step III in 0.5-1mol/L KOH solution at 50-60 ℃ for 30-40 hours for ion exchange; the membrane is washed by deionized water until the eluent is neutral.
2. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell as claimed in claim 1, wherein the mass ratio of the 1-adamantane formaldehyde, the alkaline catalyst, the high boiling point solvent and the 2-fluoroimidazole in the step I is 1.91 (0.5-0.8) to 1 (10-15).
3. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to claim 1, wherein the high boiling point solvent is one or more selected from N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.
4. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to claim 1, wherein the alkaline catalyst is one or more selected from potassium tert-butyl alkoxide, sodium hydride, lithium boronate and trisodium boronate.
5. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to claim 1, wherein the inert gas is selected from one of helium, neon and argon.
6. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to claim 1, wherein the mass ratio of the 1-adamantyl hydroxy-substituted methyl-2-fluoroimidazole, the 1,1, 2-trifluoro-2-chloro-3-methyl-3-vinylcyclobutane and the dichloromethane in the step II is 1.36:1 (10-15).
7. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to claim 1, wherein the mass ratio of the polymerized cyclobutyl substituted imidazole salt, N-vinylphthalimide, 3- (4-fluorophenyl) -2-acrylonitrile, 1, 8-bisvinyl perfluorooctane and the initiator in step III is 1:0.2:0.5:0.1 (0.01-0.03).
8. The method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to claim 1, wherein the initiator is one or more selected from benzoin ethyl ether, benzoin dimethyl ether, benzoin isopropyl ether and benzoin butyl ether.
9. The polyelectrolyte membrane for the new energy automobile fuel cell, which is prepared by the method for preparing the polyelectrolyte membrane for the new energy automobile fuel cell according to any one of claims 1 to 8.
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