Ionic liquid modified alkaline anion membrane water electrolysis catalyst and preparation method thereof
By modifying the AEM catalyst ionic liquid, the problems of high overpotential and poor cycle stability in the electrolytic water system are solved, and more efficient electrolytic water decomposition and longer catalyst service life are achieved.
Patent Information
- Application Number
- CN202211501460.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-28
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2042-11-28
AI Technical Summary
AEM catalysts have problems with high overpotential and poor cycle stability in electrolytic water systems, which affect the energy efficiency of the electrolytic water system and the service life of the catalyst.
The AEM catalyst is modified by introducing ionic liquid, the number of active points on the catalyst surface is increased, the transfer and transfer of OH- is enhanced, the ohmic polarization is reduced, and the contact between water molecules and the catalyst is accelerated through the hydrophilic structure design, thereby improving the stability of the catalyst.
It effectively reduces the overpotential of the electrolytic water system, improves the cycle stability and service life of the catalyst, and enhances the energy efficiency of the electrolytic water system.
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Figure CN115874194B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electrochemistry, and in particular to an ionic liquid modified alkaline anion membrane water electrolysis catalyst and a preparation method thereof. Background Art
[0002] As people's demand for renewable energy continues to grow, this has stimulated the development of sustainable clean energy technologies. Among them, new energy technologies that use electrochemical reactions to convert chemical energy into electrical energy have received widespread attention.
[0003] From the perspective of materials, performance, efficiency and cost, the water electrolysis system based on anion exchange membrane (AEM) is a very attractive technology in the hydrogen production process. In the AEM water electrolysis system, the AEM catalyst can usually greatly reduce the activation energy of water electrolysis, thereby reducing the overpotential of water electrolysis. Therefore, the quality of the catalyst determines the total voltage required for water electrolysis and the conversion efficiency of electrical energy into hydrogen energy.
[0004] However, there are still many challenges in the practical application of AEM catalysts. For example, the cathode reaction in the water electrolysis system involves oxygen reduction reaction (ORR) and evolution reaction (OER). Since the kinetics of these two reactions are relatively slow, there is a large overpotential during the charge and discharge process, which reduces the energy efficiency of the water electrolysis system.
[0005] In addition, after long-term use, AEM catalysts will undergo a series of physical and chemical changes, such as lattice deformation, changes in pore structure and specific surface area, loss of active components, and coverage of active sites, which make the catalyst easily deactivated and lead to poor cyclic stability of AEM catalysts. Summary of the invention
[0006] In order to effectively reduce the overpotential of the water electrolysis system and improve the cyclic stability of the catalyst, the present application provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst and a preparation method thereof
[0007] In a first aspect, the present application provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst, comprising the following components in parts by weight: 60-90 parts of AEM catalyst; 8-40 parts of ionic liquid;
[0008] The ionic liquid is composed of cations and anions; the cations are selected from one or more of quaternary ammonium salts as shown in formula (1), phosphates as shown in formula (2), imidazoles as shown in formula (3), pyrroles as shown in formula (4), and piperidines as shown in formula (5); the anions are selected from one or more of tetrafluoroborate as shown in formula (6), hexafluorophosphate as shown in formula (7), perchlorate as shown in formula (8), dioxalatoborate as shown in formula (9), trifluoromethylsulfonate as shown in formula (10), bistrifluoromethylsulfonate as shown in formula (11), and bis(fluorosulfonyl)imide as shown in formula (12);
[0009] Here, R1-R4 in formula (1), R1-R4 in formula (2), R4 and R' in formula (3), and R in formula (5) are independently selected from alkyl substituents such as methyl, ethyl, and propyl.
[0010] The present application utilizes the designability of the anion and cation structure, selects the anions and cations as the above-mentioned types, adjusts the amount of ionic liquid added, and then modifies the AEM catalyst to obtain an ionic liquid-modified alkaline anion membrane water electrolysis catalyst.
[0011] The present application can increase the number of active sites on the surface of the AEM catalyst by introducing ionic liquids, thereby improving the catalytic activity of the AEM catalyst; the high conductivity of the ionic liquid can enhance the transmission and transfer of OH- on the catalyst surface, reduce ohmic polarization, and achieve the effect of reducing the overpotential of the catalyst. The hydrophilic and hydrophobic structural design of the ionic liquid can accelerate the contact between H2O and the catalyst, reduce the contact time, enhance the stability of the catalyst, inhibit the dissolution of the catalyst, and improve the cycle life.
[0012] Preferably, the added amount of the ionic liquid is 8-20 parts.
[0013] In a specific embodiment, the added amount of the ionic liquid can be 8 parts, 10 parts, 20 parts, or 40 parts.
[0014] In some specific embodiments, the added amount of the ionic liquid can also be 8-10 parts, 8-40 parts, 10-20 parts, 10-40 parts, or 20-40 parts.
[0015] Through experimental analysis, it can be known that the present application controls the addition amount of the ionic liquid to be within the above range, which can effectively reduce the overpotential of the modified catalyst and increase the cycle stability of the modified catalyst.
[0016] Preferably, the AEM catalyst is selected from one or more of Pt, Pt / C, RuO2, IrO2, Ni-based alloy catalyst, transition metal oxide, transition metal hydroxide, transition metal sulfide, and transition metal phosphide.
[0017] Furthermore, the Ni-based alloy catalyst is selected from one or more of Ni-Mo, Ni-Co, Ni-W, Ni-Fe, and Ni-Cr.
[0018] Furthermore, the AEM catalyst is selected from one or both of Ni-based catalyst layered hydroxide (LDH) and Ni-based catalyst metal organic compound (MOF).
[0019] In a specific embodiment, the AEM catalyst may be one or both of NiFe-LDH and NiFe-MOF.
[0020] Preferably, the ionic liquid is an imidazole ionic liquid or a piperidine ionic liquid.
[0021] Furthermore, the ionic liquid is an imidazole ionic liquid and a piperidine ionic liquid in a molar ratio of (5-8):(2-5).
[0022] Experimental analysis shows that when the above two ionic liquids are selected and the molar ratio is controlled within the above range, the overpotential of the ionic liquid-modified alkaline anion membrane water electrolysis catalyst can be further reduced and the cycle stability can be improved.
[0023] In a specific embodiment, the imidazolium ionic liquid may be 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt.
[0024] In a specific embodiment, the piperidine ionic liquid may be 1-methyl-1-propylpiperidinium bis(trifluoromethylsulfonyl)imide salt.
[0025] In a second aspect, the present application provides a method for preparing the above-mentioned ionic liquid modified alkaline anion membrane water electrolysis catalyst, which specifically comprises the following steps:
[0026] respectively performing drying pretreatment on the AEM catalyst and the ionic liquid;
[0027] The AEM catalyst is mixed with the ionic liquid to obtain an ionic liquid-AEM catalyst mixture;
[0028] The ionic liquid-AEM catalyst mixture is subjected to vacuum degassing and vacuum drying in sequence to obtain the ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0029] The preparation method of the ionic liquid modified alkaline anion membrane water electrolysis catalyst provided in the present application is simple, the required equipment is simple, and it is suitable for large-scale production and application.
[0030] Preferably, the drying pretreatment conditions are: temperature 110-130° C., time 6-12 h.
[0031] Preferably, the mixing reaction is carried out by one or more methods selected from ultrasonic treatment, ball milling treatment and sand milling treatment.
[0032] Furthermore, the specific operation of the ultrasonic treatment is:
[0033] The AEM catalyst and the ionic liquid are mixed uniformly, and then placed in an ice bath for ultrasonic dispersion at a power of 500-700 W for 30-120 min.
[0034] The present application chooses to modify the AEM catalyst with ionic liquid under ice bath conditions, which can effectively prevent the agglomeration of the catalyst, thereby facilitating the efficiency of the mixed reaction and improving the performance of the modified catalyst.
[0035] Furthermore, the specific operation of the ball milling process is:
[0036] The AEM catalyst, the ionic liquid and the reaction solvent are mixed, and stainless steel grinding balls are added for ball milling for 18-24 hours;
[0037] Wherein, the reaction solvent comprises water and isopropanol in a volume ratio of 5:(0.8-1.2); the material-liquid ratio is 5:(5-7); and the material-ball weight ratio is 5:(180-220).
[0038] Furthermore, the stainless steel grinding balls include three types of stainless steel grinding balls with diameters of 6 mm, 10 mm and 20 mm respectively; the number ratio of the three types of stainless steel grinding balls with diameters of 6 mm, 10 mm and 20 mm is (17-23):(8-12):1.
[0039] The present application utilizes the above-mentioned ball milling method to enable better dispersion of various materials during the ball milling process, which is beneficial to the modification of the AEM catalyst by the ionic liquid, thereby reducing the overpotential of the ionic liquid-modified alkaline anion membrane water electrolysis catalyst and improving the cycle stability.
[0040] Preferably, the vacuum degassing conditions are: stirring at a rotation speed of 500-600 r / min for 4-6 min, and then adjusting the rotation speed to 1800-2200 r / min and stirring for 17-23 min.
[0041] Preferably, the vacuum drying conditions are: temperature 60-80°C, time 2-6h.
[0042] In summary, the technical solution of this application has the following effects:
[0043] The present application obtains an ionic liquid modified alkaline anion membrane water electrolysis catalyst by screening the types of anions and cations in the ionic liquid, adjusting the amount of the ionic liquid added, and then modifying the AEM catalyst.
[0044] The ionic liquid modified alkaline anion membrane water electrolysis catalyst provided in the present application can effectively reduce the overpotential of water electrolysis and has good cycle stability.
[0045] The preparation method of the ionic liquid modified alkaline anion membrane water electrolysis catalyst provided in the present application is simple, the required equipment is simple, and it is suitable for large-scale production and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0046] Figure 1 This is a polarization curve diagram of the ionic liquid modified alkaline anion membrane water electrolysis catalyst in Example 2 and the unmodified AEM catalyst in Control Example 1.
[0047] Figure 2 This is a test diagram of the cyclic stability of the ionic liquid modified alkaline anion membrane water electrolysis catalyst in Example 2. DETAILED DESCRIPTION
[0048] In a first aspect, the present application provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst, comprising the following components in parts by weight: 60-90 parts of AEM catalyst; 8-40 parts of ionic liquid;
[0049] Among them, the ionic liquid is composed of cations and anions; the cations are selected from one or more of quaternary ammonium salts, phosphates, imidazoles, pyrroles, and piperidines; the anions are selected from one or more of tetrafluoroborate, hexafluorophosphate, perchlorate, dioxalatoborate, trifluoromethylsulfonate, bistrifluoromethylsulfonate, and bis(fluorosulfonyl)imide.
[0050] Specifically, the amount of the ionic liquid added is 8-20 parts.
[0051] The AEM catalyst is selected from one or more of Pt, Pt / C, RuO2, IrO2, Ni-based alloy catalyst, transition metal oxide, transition metal hydroxide, transition metal sulfide, and transition metal phosphide.
[0052] The Ni-based alloy catalyst is selected from one or more of Ni-Mo, Ni-Co, Ni-W, Ni-Fe, and Ni-Cr.
[0053] Further, the AEM catalyst is one or both of the AEM catalyst selected from Ni-based catalyst layered hydroxide (LDH) and Ni-based catalyst metal organic compound (MOF).
[0054] Preferably, the ionic liquid is an imidazole ionic liquid or a piperidine ionic liquid.
[0055] Furthermore, the ionic liquid is an imidazole ionic liquid and a piperidine ionic liquid in a molar ratio of (5-8):(2-5).
[0056] In a second aspect, the present application provides a method for preparing the above-mentioned ionic liquid modified alkaline anion membrane water electrolysis catalyst, which specifically comprises the following steps:
[0057] The AEM catalyst and the ionic liquid were placed at 110-130°C for drying pretreatment for 6-12h;
[0058] The AEM catalyst is mixed with the ionic liquid to react to obtain an ionic liquid-AEM catalyst mixture;
[0059] The ionic liquid-AEM catalyst mixture is subjected to vacuum degassing and vacuum drying in sequence to obtain an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0060] The mixing reaction is carried out by one or more methods selected from ultrasonic treatment, ball milling treatment and sand milling treatment.
[0061] Specifically, the specific operation of ultrasonic treatment is:
[0062] The AEM catalyst and the ionic liquid were mixed evenly, and then dispersed in an ice bath with ultrasonic waves at a power of 500-700 W for 30-120 min.
[0063] Specifically, the specific operations of ball milling are:
[0064] AEM catalyst, ionic liquid and reaction solvent were mixed, and stainless steel grinding balls were added for ball milling for 18-24 hours;
[0065] Wherein, the reaction solvent comprises water and isopropanol in a volume ratio of 5:(0.8-1.2);
[0066] The material-liquid ratio is 5:(5-7); the material-ball weight ratio is 5:(180-220).
[0067] The stainless steel grinding balls include three kinds of stainless steel grinding balls with diameters of 6 mm, 10 mm and 20 mm respectively; the number ratio of the three kinds of stainless steel grinding balls with diameters of 6 mm, 10 mm and 20 mm is (17-23):(8-12):1.
[0068] The conditions for vacuum degassing are: stirring at a speed of 500-600 r / min for 4-6 min, and then adjusting the speed to 1800-2200 r / min and stirring for 17-23 min.
[0069] The vacuum drying conditions are: temperature 60-80°C, time 2-6h.
[0070] The present application is further described in detail below in conjunction with examples, comparative examples and performance testing experiments. These examples should not be construed as limiting the scope of protection claimed in the present application.
[0071] The ionic liquids used in the examples and comparative examples were prepared according to the literature (An Yongxin, "Study on Electrochemical Properties of Ionic Liquid Electrolytes for Lithium-ion Batteries", 2011).
[0072] Example
[0073] Examples 1-3
[0074] Examples 1-3 respectively provide an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0075] The difference between the above embodiments is that the amount of ionic liquid added is as shown in Table 1.
[0076] Table 1 Addition amount of ionic liquid
[0077]
[0078] The preparation method of the ionic liquid modified alkaline anion membrane water electrolysis catalyst in the above embodiment specifically comprises the following steps:
[0079] S1: Drying pretreatment
[0080] The AEM catalyst and ionic liquid were placed in a vacuum oven at 120°C for 10 hours for drying pretreatment; the AEM catalyst was NiFe-LDH, and the ionic liquid was an imidazole ionic liquid 1-ethyl-3-methylimidazolium bistrifluoromethanesulfonyl imide (EMITFSI) and a piperidine ionic liquid 1-methyl-1-propylpiperidinium bistrifluoromethanesulfonyl imide (PP13TFSI) with a molar ratio of 6:4.
[0081] S2: ball milling reaction
[0082] The catalyst and the ionic liquid were mixed evenly according to the addition amounts in Table 1, 0.5 g of the mixture was placed in a ball mill, 0.6 ml of a reaction solvent was added, the reaction solvent was water and isopropanol in a volume ratio of 5:1, and 20 g of stainless steel ball milling balls were added, the stainless steel ball milling balls included three types of stainless steel ball milling balls with diameters of 6 mm, 10 mm, and 20 mm (the number ratio was 20:10:1) for ball milling; the ball milling was carried out at a ball milling speed of 150 r / min for 18 h to obtain an ionic liquid-AEM catalyst mixture.
[0083] S3: Post-processing
[0084] Vacuum degassing treatment: the ball-milled ionic liquid-AEM catalyst mixture was placed in a degassing tank, stirred at a speed of 550 r / min for 5 min, and then adjusted to a speed of 2000 r / min and stirred for 20 min.
[0085] Drying treatment: the vacuum degassing mixture is placed at 70° C. for vacuum drying for 4 h, and water is removed by rotary evaporation to obtain an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0086] Example 4
[0087] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0088] The difference between this embodiment and embodiment 2 is that the AEM catalyst is NiFe-MOF.
[0089] Example 5
[0090] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0091] The difference between this embodiment and embodiment 2 is that the AEM catalyst is Co3O4.
[0092] Example 6
[0093] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0094] The difference between this embodiment and embodiment 2 is that the ionic liquid is an imidazole ionic liquid 1 ethyl 3 methyl imidazole bis trifluoromethanesulfonyl imide salt (EMITFSI) and a piperidine ionic liquid 1-methyl-1-propylpiperidinium bis trifluoromethanesulfonyl imide salt (PP13TFSI) in a molar ratio of 5:5.
[0095] Example 7
[0096] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0097] The difference between this embodiment and embodiment 2 is that the ionic liquid is an imidazole ionic liquid 1 ethyl 3 methyl imidazole bis trifluoromethanesulfonyl imide salt (EMITFSI) and a piperidine ionic liquid 1-methyl-1-propylpiperidinium bis trifluoromethanesulfonyl imide salt (PP13TFSI) in a molar ratio of 8:2.
[0098] Example 8
[0099] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0100] The difference between this embodiment and embodiment 2 is that the ionic liquid is an imidazole ionic liquid 1 ethyl 3 methyl imidazole bis trifluoromethanesulfonyl imide salt (EMITFSI) and a piperidine ionic liquid 1-methyl-1-propylpiperidinium bis trifluoromethanesulfonyl imide salt (PP13TFSI) in a molar ratio of 4:6.
[0101] Example 9
[0102] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0103] The difference between this embodiment and embodiment 2 is that the ionic liquid is an imidazole ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt (EMITFSI) and a piperidine ionic liquid 1-methyl-1-propylpiperidinium bis(trifluoromethanesulfonyl)imide salt (PP13TFSI) in a molar ratio of 9:1.
[0104] Example 10
[0105] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0106] The difference between this embodiment and embodiment 2 is that the ionic liquid is an imidazole ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt (EMITFSI).
[0107] Embodiment 11
[0108] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0109] The difference between this embodiment and embodiment 2 is that the ionic liquid is a piperidine ionic liquid 1-methyl-1-propylpiperidinium bis(trifluoromethylsulfonyl)imide salt (PP13TFSI).
[0110] Example 12
[0111] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0112] The difference between this embodiment and embodiment 2 is that the ionic liquid is a quaternary ammonium ionic liquid triethylmethylammonium bistrifluoromethanesulfonyl imide salt.
[0113] Embodiment 13
[0114] This embodiment provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0115] The difference between this embodiment and embodiment 2 is that the method adopted for the mixing reaction in S2 is ultrasonic treatment.
[0116] The specific operation of ultrasonic treatment is:
[0117] The AEM catalyst and the ionic liquid were mixed evenly and dispersed in an ice bath with ultrasonic power of 600 W for 60 min.
[0118] Comparative Example
[0119] Comparative Example 1
[0120] This comparative example provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0121] The difference between this comparative example and Example 2 is that the amount of the ionic liquid added is 0.05 g.
[0122] Comparative Example 2
[0123] This comparative example provides an ionic liquid modified alkaline anion membrane water electrolysis catalyst.
[0124] The difference between this comparative example and Example 2 is that the amount of the ionic liquid added is 0.45 g.
[0125] Performance testing
[0126] (1) Preparation of sample slurry: Under ultrasonic conditions of 600 W, 4 mg of the ionic liquid modified alkaline anion membrane water electrolysis catalyst in the embodiment and the comparative example were respectively mixed with 0.78 mL of isopropanol and 20 μL of Nafion for 30 min to prepare the sample slurry.
[0127] And under ultrasonic conditions of 600 W, 4 mg NiFe-LDH, NiFe-MOF, Co3O4 were ultrasonically mixed with 0.78 mL isopropanol and 20 μL Nafion for 30 min, which were used as control examples 1, 2, and 3, respectively.
[0128] (2) Electrochemical performance test: A rotating disk electrode (RDE, Pine, USA) was connected to an electrochemical workstation (CHI 750D, Shanghai Chenhua) to investigate the overpotential of the catalyst. The test environment was alkaline, and the three-electrode system used Hg / HgO (1M KOH single salt bridge) as the reference electrode, a carbon rod as the counter electrode, and a glassy carbon electrode (5 mm in diameter).
[0129] Test results: as shown in Table 2.
[0130] The polarization curves of the catalysts in Example 2 and Comparative Example 1 are shown in FIG. Figure 1 shown.
[0131] Depend on Figure 1 It can be seen that compared with the unmodified catalyst in Control Example 1, the E 100 From 1.9V to 1.5V, E 200 The potential dropped from 2V to 1.6V; the test results show that after the AEM catalyst is modified by ionic liquid in the present application, the overpotential of the catalyst can be effectively reduced.
[0132] (3) Cycle stability test: Test condition is 100mA / cm 2 The cyclic stability of the catalyst was investigated under electric current for 30 h.
[0133] Test results: as shown in Table 2.
[0134] Among them, the cyclic stability of the catalyst in Example 2 is as follows Figure 2 shown.
[0135] Depend on Figure 2 It can be seen that the ionic liquid modified alkaline anion membrane water electrolysis catalyst provided in Example 2 of the present application is 100mA / Cm 2 Under current, the voltage was basically not attenuated during 30h constant current cyclic charge and discharge, indicating that the AEM catalyst modified by ionic liquid in the present application has good cycle stability.
[0136] Table 2 Performance test results of catalysts in Examples 1-13, Comparative Examples 1-2 and Comparative Examples 1-3
[0137]
[0138]
[0139] Combined with the test results of Table 2, by comparing the test results of Examples 1-13 with Comparative Examples 1-2 and Control Examples, it can be seen that the present application uses the designed ionic liquid to modify the AEM catalyst, and the obtained ionic liquid modified alkaline anion membrane electrolysis water catalyst reduces the ohmic polarization phenomenon. After 30h constant current cycle charge and discharge, the battery capacity retention rate is maintained at a high level. The above test results show that the ionic liquid modified alkaline anion membrane electrolysis water catalyst provided by the present application has a low overpotential and excellent cycle stability.
[0140] By comparing the test results of Examples 1-3 with Comparative Examples 1-2 and the reference example, when the addition amount of the ionic liquid is controlled to be 8-40 parts, the overpotential of the catalyst can be effectively reduced and the cycle stability of the catalyst can be improved.
[0141] By comparing the test results of Examples 2, 4, and 5 with those of Control Examples 1-3, when the AEM catalyst is NiFe-LDH, the modification effect of the ionic liquid on the AEM catalyst is relatively excellent.
[0142] By comparing the test results of Example 1 with those of Examples 6-12, when the ionic liquid is an imidazole ionic liquid and a piperidine ionic liquid in a molar ratio of (5-8):(2-5), the performance of the modified catalyst can be further improved.
[0143] By comparing the test results of Example 2 with those of Example 13, compared with the use of ultrasonic treatment, the present application selects the ball milling method to modify the catalyst, which can effectively improve the performance of the catalyst.
[0144] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.
Claims
1. An ionic liquid modified alkaline anion membrane water electrolysis catalyst, characterized in that: The invention comprises the following components in parts by weight: 60-90 parts of AEM catalyst; 8-40 parts of ionic liquid; The AEM catalyst is a layered hydroxide of a Ni-based catalyst; The ionic liquid is composed of 1-ethyl-3-methylimidazolium bis-trifluoromethanesulfonyl imide salt and 1-methyl-1-propylpiperidinium bis-trifluoromethanesulfonyl imide salt in a molar ratio of (5-8): (2-5); The preparation method of the ionic liquid modified alkaline anion membrane water electrolysis catalyst specifically comprises the following steps: respectively performing drying pretreatment on the AEM catalyst and the ionic liquid; The AEM catalyst and the ionic liquid are subjected to ball milling treatment for mixed reaction to obtain an ionic liquid-AEM catalyst mixture; The ionic liquid-AEM catalyst mixture is subjected to vacuum degassing and vacuum drying in sequence to obtain the ionic liquid modified alkaline anion membrane water electrolysis catalyst; The specific operation of the ball milling process is: The AEM catalyst, the ionic liquid and the reaction solvent are mixed, and stainless steel grinding balls are added for ball milling for 18-24 hours; wherein the reaction solvent comprises water and isopropanol in a volume ratio of 5:(0.8-1.2); the material-liquid ratio is 5:(5-7); and the material-ball weight ratio is 5:(180-220).
2. The ionic liquid modified alkaline anion membrane water electrolysis catalyst according to claim 1, characterized in that: The added amount of the ionic liquid is 8-20 parts.
3. The method for preparing the ionic liquid modified alkaline anion membrane water electrolysis catalyst according to any one of claims 1 to 2, characterized in that: The specific steps include: respectively performing drying pretreatment on the AEM catalyst and the ionic liquid; The AEM catalyst and the ionic liquid are subjected to ball milling treatment for mixed reaction to obtain an ionic liquid-AEM catalyst mixture; The ionic liquid-AEM catalyst mixture is subjected to vacuum degassing and vacuum drying in sequence to obtain the ionic liquid modified alkaline anion membrane water electrolysis catalyst; The specific operation of the ball milling process is: The AEM catalyst, the ionic liquid and the reaction solvent are mixed, and stainless steel grinding balls are added for ball milling for 18-24 hours; wherein the reaction solvent comprises water and isopropanol in a volume ratio of 5:(0.8-1.2); the material-liquid ratio is 5:(5-7); and the material-ball weight ratio is 5:(180-220).