A method for preparing a cs precipitated zeolite structure membrane electrode

Abstract

This invention discloses a method for preparing a Cs-precipitated zeolite-structured membrane electrode. First, soluble carbonate, an organic template agent, and a structure-directing agent are dissolved in water. A titanium source is then added, and fumed silica is introduced to form a stable gel. This gel is then mixed with carbon powder and ground to obtain a zeolite-carbon composite powder. This powder is dispersed into a slurry and coated onto a substrate. The slurry is then immersed in an organic solvent containing a platinum precursor and an alkaline cesium salt. A reducing agent is added, and through chemical reduction, platinum and cesium species are co-deposited in a microporous layer. The diffusion layer is then hot-pressed onto a proton exchange membrane to assemble the membrane electrode. The membrane electrode prepared by this method exhibits excellent durability, with a performance degradation rate significantly lower than that of traditional Pt / C catalysts. It maintains high current density output under different humidity conditions, demonstrating enhanced environmental adaptability. Simultaneously, it avoids the "flooding" phenomenon under high humidity conditions, giving the membrane electrode high catalytic activity, long lifespan stability, and good adaptability to various operating conditions.

Description

Technical Field

[0001] This invention relates to the field of membrane electrode fabrication, and in particular to a method for fabricating a Cs precipitated zeolite structure membrane electrode. Background Technology

[0002] The membrane electrode assembly (MEA) is a core component of a PEMFC, and its performance directly determines the battery's energy output efficiency and durability. Currently, commercially available MEAs commonly use carbon-supported platinum (Pt / C) as the catalyst layer. However, this technological approach faces two major challenges:

[0003] First, there is the scarcity and high cost of platinum resources: Platinum is a globally scarce precious metal resource, and its high cost severely restricts the large-scale commercial application of fuel cells. Therefore, how to significantly reduce platinum loading and improve its utilization efficiency while ensuring high performance, i.e., achieving "low platinum content," has become a technical bottleneck that the industry urgently needs to overcome.

[0004] Secondly, there is the challenge of water management: PEMFCs generate water during operation. If the generated water cannot be drained in time, it will accumulate in the pores of the catalyst layer and gas diffusion layer, causing a "flooding" phenomenon. This hinders the transport of reactant gases (hydrogen and oxygen) to the catalytic active sites, leading to a sharp decline in battery performance. This problem is particularly prominent during high current density operation and long-term durability testing.

[0005] Existing technologies often struggle to address both of these challenges. Therefore, how to achieve efficient utilization of platinum resources while enabling fuel cells to operate for extended periods in high-acid, high-water environments has become an urgent problem to be solved. Summary of the Invention

[0006] The main technical problem solved by this invention is to provide a method for preparing a Cs precipitated zeolite structure membrane electrode, which can significantly improve the utilization rate and catalytic efficiency of platinum atoms through the synergistic catalytic effect of Pt and Cs, while effectively avoiding the "flooding" phenomenon in battery operation by utilizing the micro-hydrophobic environment created by Cs species, thereby taking into account both the high performance and long lifespan of the fuel cell.

[0007] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a method for preparing a Cs precipitated zeolite structured membrane electrode, comprising the following steps:

[0008] (1) Preparation of zeolite-carbon composite microporous layer:

[0009] a. Dissolve the soluble carbonate in an aqueous solution containing an organic template agent and a structure directing agent to form a homogeneous solution;

[0010] b. Add a titanium source to the solution obtained in step a, continue stirring, and then introduce fumed silica (SiO2) as a silicon source to obtain a stable fumed gel solution;

[0011] c. The stable vapor-phase gel solution obtained in step b is mixed with carbon powder and reacted under high temperature and rotation conditions to obtain a zeolite-carbon composite solution. The solution is further washed with alcohol, dried and ground to obtain zeolite-carbon composite powder as a microporous layer.

[0012] (2) Preparation and modification of the gas diffusion layer:

[0013] a. Disperse the zeolite-carbon composite powder obtained in step (1) in an organic solvent to form a slurry. Coat the slurry onto the surface of the substrate to achieve a zeolite-carbon composite microporous layer loading of 1-2 mg / cm². 2 After drying and heat treatment, a stable gas diffusion layer is obtained;

[0014] b. The gas diffusion layer obtained in step a is immersed in an organic solvent containing a platinum precursor and an alkaline cesium salt, and the pH of the solution is adjusted to an acidic condition of 2-3 using an acid solution;

[0015] c. After activating the solution in step b, a reducing agent is added to convert the solution system into an alkaline condition with a pH of 10-12, and a chemical reduction reaction is carried out to reduce platinum species and cesium species and allow them to precipitate together in the zeolite-carbon microporous layer. After the reaction is completed, the solution is dried to obtain a gas diffusion layer modified with platinum and cesium.

[0016] (3) Membrane electrode assembly:

[0017] The gas diffusion layer obtained in step (2) is combined with the proton exchange membrane by hot pressing to obtain the Cs modified zeolite-carbon composite membrane electrode.

[0018] In a preferred embodiment of the present invention, in step (1)a, the soluble carbonate includes one or more of potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate, providing a mild and controllable alkaline environment that is conducive to the directional crystallization of specific zeolite structures.

[0019] In a preferred embodiment of the present invention, in step (1)a, the organic template agent is N,N,N-trimethyl-1-aminoadamantane hydroxide (TMAdaOH) with a mass concentration of 25%, which is a key structure-directing molecule for forming the target zeolite framework.

[0020] In a preferred embodiment of the present invention, in step (1)a, the structure directing agent is hexamethylene amide (HMI), which works synergistically with TMAdaOH to regulate the chemical environment of the synthesized gel, stabilize the crystallization process, and optimize the growth of zeolite crystals.

[0021] In a preferred embodiment of the present invention, the mass ratio of N,N,N-trimethyl-1-aminoadamantane hydroxide (TMAdaOH) to hexamethylene amide (HMI) is in the range of 1:10 to 1:2. This ratio range ensures the best synergistic effect between the organic template agent and the structure directing agent, thereby successfully synthesizing the key parameters of the target zeolite structure.

[0022] In a preferred embodiment of the present invention, in step (1)b, the titanium source is tetrabutyl titanate (HBOT), and titanium atoms enter the zeolite framework to generate catalytic active sites that are beneficial to the oxygen reduction reaction.

[0023] In a preferred embodiment of the present invention, the amount of tetrabutyl titanate (HBOT) added is 5% to 10% of the mass of hexamethylenetetramine (HMI). This ratio range ensures the effective doping amount of the framework titanium. Too little will result in insufficient activity, while too much may damage the integrity of the framework.

[0024] In a preferred embodiment of the present invention, in step (1)c, the amount of carbon powder added is 5% to 10% of the total mass of the vapor-phase gel solution. This ratio ensures the formation of a continuous three-dimensional conductive network while avoiding excessive carbon powder covering the active surface of the zeolite.

[0025] In a preferred embodiment of the present invention, in step (2)a, the substrate is carbon paper, which is a Toray TGP, Freudenberg or Avcarb series product, and commercial carbon paper with excellent conductivity and gas diffusion capability is selected as the support substrate.

[0026] In a preferred embodiment of the present invention, in the slurry, in step (2)a, the solid content of the zeolite-carbon composite powder is 1% to 2%. This solid content range can ensure that the slurry has good rheological properties, which is convenient for uniform coating and precise control of the microporous layer loading.

[0027] In a preferred embodiment of the present invention, in step (2)b, the platinum precursor is chloroplatinic acid; the basic cesium salt is cesium carbonate (Cs2CO3), and chloroplatinic acid and cesium carbonate serve as efficient sources of platinum and cesium.

[0028] In a preferred embodiment of the present invention, in step (2)b, the organic solvent is isopropanol, which is a good dispersion medium; the acid solution is nitric acid (HNO3) used to adjust the pH value;

[0029] In a preferred embodiment of the present invention, in step (2)c, the activation treatment includes microwave radiation treatment or ultrasonic treatment to promote the penetration and adsorption of active components in the diffusion layer.

[0030] In a preferred embodiment of the present invention, in step (2)c, the reducing agent is sodium citrate or sodium borohydride, which is a mild or strong reducing agent to achieve controllable deposition.

[0031] In a preferred embodiment of the present invention, in step (2)c, the platinum loading on the platinum-cesium modified gas diffusion layer is 0.2 mg / cm² to 0.3 mg / cm². This loading allows for efficient utilization of platinum atoms, significantly reducing the amount of precious metals used and the cost while maintaining activity.

[0032] In a preferred embodiment of the present invention, in step (3), the proton exchange membrane is an expanded polytetrafluoroethylene reinforced composite proton membrane with a thickness between 8 µm and 12 µm. This thickness range of reinforced membrane has excellent proton conductivity, mechanical strength and dimensional stability, which is beneficial to reducing battery internal resistance and improving durability.

[0033] The beneficial effects of this invention are as follows: By constructing a zeolite-carbon composite microporous layer and combining it with a Pt / Cs co-deposition process, the overall performance of the membrane electrode assembly (MEA) is significantly improved. The MEA prepared by this method exhibits excellent durability, with a performance degradation rate significantly lower than that of traditional Pt / C catalysts. It maintains high current density output under different humidity conditions, demonstrating enhanced environmental adaptability, especially in low-humidity environments. Simultaneously, the micro-hydrophobic environment formed by the introduction of Cs species effectively promotes water management, avoiding the "flooding" phenomenon under high-humidity conditions. These characteristics collectively endow the MEA with high catalytic activity, long lifespan stability, and good operating condition adaptability, providing a reliable solution for the practical application of fuel cells. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Generally, the components of the embodiments of the present invention can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The embodiments of the present invention include:

[0039] Example 1:

[0040] A method for preparing a Cs precipitated zeolite structured film electrode includes the following steps:

[0041] (1) Preparation of zeolite-carbon composite microporous layer:

[0042] a. Weigh 3 g KHCO3, 1 g TMAdaOH (25%), and 5 g HMI and add them to 100 ml of deionized water. Stir to dissolve and form a homogeneous solution.

[0043] b. Add 0.5 g HBOT to the solution obtained in step a, stir the mixture with a fan blade for 2 h and continuously introduce gaseous SiO2 to obtain a stable gaseous gel solution;

[0044] c. Transfer the stable vapor-phase gel solution obtained in step b to a reaction vessel, add 2 g of Vulcan XC-72 carbon powder, and rotate the reaction at 400℃ for 24 h to obtain a zeolite-C composite solution. Wash the zeolite-C composite solution with a large amount of ethanol, dry the washed material in an oven at 400℃, and grind it to obtain zeolite-C composite powder as a microporous layer.

[0045] (2) Preparation and modification of the gas diffusion layer:

[0046] a. Weigh 1 g of the zeolite-carbon composite powder obtained in step (1), disperse it in 100 ml of isopropanol, and ultrasonically disperse it for 20 min to form a uniform slurry. Load the slurry onto Toray TGP-H-060 carbon paper by spraying, control the loading of the zeolite-carbon composite microporous layer to be 1.2 ± 0.2 mg / cm², and obtain a stable gas diffusion layer after drying.

[0047] b. Cut the gas diffusion layer obtained in step a into 5*5 cm pieces. 2 Place it in a 100 ml beaker and immerse it in a solution containing 60 ml isopropanol, 0.3 mol / L chloroplatinic acid and 0.5 g Cs2CO3. Adjust the pH of the solution to 2 with 1 mol / L HNO3.

[0048] c. Microwave the solution from step b for 100 s, then add 0.5 mol / L sodium borohydride solution with stirring to raise the pH of the solution to 12. Allow it to stand for a full reaction, so that the platinum and cesium species are reduced and precipitated together in the zeolite-carbon microporous layer. After the reaction is complete, dry it in an oven at 40℃ to obtain a gas diffusion layer with a platinum loading of 0.26 mg / cm².

[0049] (3) Membrane electrode assembly:

[0050] The two gas diffusion layers prepared in step (2) are hot-pressed with the GORE® 8 μm proton exchange membrane under standard hot-pressing conditions with the microporous surface facing the proton membrane to obtain the final membrane electrode assembly.

[0051] Example 2:

[0052] A method for preparing a Cs precipitated zeolite structured film electrode includes the following steps:

[0053] (1) Preparation of zeolite-carbon composite microporous layer:

[0054] a. Weigh 2 g K2CO3, 0.5 g TMAdaOH (25%), and 4 g HMI and add them to 100 ml of deionized water. Stir to dissolve and form a homogeneous solution.

[0055] b. Add 0.3 g HBOT to the solution obtained in step a, stir the mixture with a fan blade for 2 h and continuously introduce gaseous SiO2 to obtain a stable gaseous gel solution;

[0056] c. Transfer the stable vapor-phase gel solution obtained in step b to a reaction vessel, add 2 g of BP2000 carbon powder, and rotate the reaction at 400℃ for 36 h to obtain a zeolite-C composite solution. Wash the zeolite-C composite solution with a large amount of ethanol, dry the washed material in an oven at 400℃, and grind it to obtain zeolite-C composite powder as a microporous layer.

[0057] (2) Preparation and modification of the gas diffusion layer:

[0058] a. Weigh 2 g of the zeolite-carbon composite powder obtained in step (1), disperse it in 80 ml of isopropanol, and disperse for 30 min to form a uniform slurry. Load the slurry onto Avcarb carbon paper by spraying, control the loading of the zeolite-carbon composite microporous layer to be 1.3 ± 0.2 mg / cm², and obtain a stable gas diffusion layer after drying;

[0059] b. Cut the gas diffusion layer obtained in step a into 5*5 cm pieces. 2 Place it in a 100 ml beaker and immerse it in a solution containing 80 ml isopropanol, 0.5 mol / L chloroplatinic acid and 0.8 g Cs2CO3. Adjust the pH of the solution to 2 with 1 mol / L HNO3.

[0060] c. Microwave the solution from step b for 100 s, then add 0.5 mol / L sodium citrate solution with stirring to raise the pH of the solution to 12. Allow it to stand for a full reaction, so that the platinum and cesium species are reduced and precipitated together in the zeolite-carbon microporous layer. After the reaction is complete, dry it in an oven at 60℃ to obtain a gas diffusion layer with a platinum loading of 0.24 mg / cm².

[0061] (3) Membrane electrode assembly:

[0062] The two gas diffusion layers prepared in step (2) are hot-pressed with the GORE® 12 μm proton exchange membrane under standard hot-pressing conditions with the microporous surface facing the proton membrane to obtain the final membrane electrode assembly.

[0063] Example 3:

[0064] A method for preparing a Cs precipitated zeolite structured film electrode includes the following steps:

[0065] (1) Preparation of zeolite-carbon composite microporous layer:

[0066] a. Weigh 2.5 g NaHCO3, 1.2 g TMAdaOH (25%), and 6 g HMI and add them to 120 ml of deionized water. Stir to dissolve and form a homogeneous solution.

[0067] b. Add 0.4 g HBOT to the solution obtained in step a, stir the mixture with a magnetic stirrer for 3 h, and continuously introduce gaseous SiO2 to obtain a stable gaseous gel solution;

[0068] c. Transfer the stable vapor-phase gel solution obtained in step b to a reaction vessel, add 1.5 g of VulcanXC-72 carbon powder, and rotate the reaction at 380℃ for 24 h to obtain a zeolite-C composite solution. Wash the zeolite-C composite solution with a large amount of ethanol, dry the washed material in an oven at 400℃, and grind it to obtain zeolite-C composite powder as a microporous layer.

[0069] (2) Preparation and modification of the gas diffusion layer:

[0070] a. Weigh 1.5 g of the zeolite-carbon composite powder obtained in step (1), disperse it in 100 ml of isopropanol, and ultrasonically disperse it for 30 min to form a uniform slurry. Load the slurry onto Freudenberg H23C carbon paper by spraying, control the loading of the zeolite-carbon composite microporous layer to be 1.5 ± 0.2 mg / cm², and obtain a stable gas diffusion layer after drying.

[0071] b. Cut the gas diffusion layer obtained in step a into 5*5 cm pieces. 2 Place it in a 100 ml beaker and immerse it in a solution containing 70 ml isopropanol, 0.3 mol / L chloroplatinic acid and 0.6 g Cs2CO3. Adjust the pH of the solution to 2.5 with 1 mol / L HNO3.

[0072] c. The solution from step b was sonicated for 30 min, and then 0.5 mol / L sodium borohydride solution was added with stirring to raise the pH value of the solution to 11. The solution was allowed to stand for a sufficient reaction, so that the platinum species and cesium species were reduced and precipitated together in the zeolite-carbon microporous layer. After the reaction was completed, the solution was dried in an oven at 60 °C to obtain a gas diffusion layer with a platinum loading of 0.25 mg / cm².

[0073] (3) Membrane electrode assembly:

[0074] The two gas diffusion layers prepared in step (2) are hot-pressed with the GORE® 10 μm proton exchange membrane under standard hot-pressing conditions with the microporous surface facing the proton membrane to obtain the final membrane electrode assembly.

[0075] Comparative Example 1:

[0076] A 12µm GORE proton exchange membrane was cut. The anode and cathode both used JM 50% Pt / C catalyst. Water / isopropanol was used as the dispersion solution, and the catalyst was uniformly dispersed using a crusher and then sprayed evenly onto both sides of the crystalline membrane using a sprayer, resulting in an anode catalyst loading of 0.2 mg / cm³. 2 The cathode catalyst loading is 0.2 mg / cm³. 2 Then, the sprayed CCM is hot-pressed with the Toray diffusion layer to obtain the membrane electrode assembly.

[0077] The membrane electrodes of Examples 1-3 and Comparative Example 1 were installed in a fuel cell test system for testing.

[0078] Durability testing method: Starting from open circuit potential, the voltage is scanned up to 0.55 V, and the test is run for 3 minutes at each current. The anode stoichiometry ratio is 1.2, and the cathode stoichiometry ratio is 2.5. The anode humidity is 100% RH, the cathode humidity is 100% RH, the hydrogen back pressure is 200 kPa, the air back pressure is 200 kPa, the anode temperature is 80℃, the cathode temperature is 80℃, and the single cell temperature is 80℃.

[0079] After 0, 2000, and 5000 cycles of nitrogen gas at a potential of 1-1.5 V, polarization tests were performed to obtain the final data.

[0080] Different humidity testing methods: Humidity tests were conducted under conditions of 40%, 80%, and 100% humidity at the anode and cathode, respectively.

[0081] Table a is a comparison table of carbon support durability data between Examples 1-3 and Comparative Example 1:

[0082]

[0083] Table b is a comparison table of different humidity data between Examples 1-3 and Comparative Example 1:

[0084]

[0085] By comparing the data from the carbon carrier durability test, it can be seen that after 5000 cycles, the attenuation range of Examples 1-3 of the present invention is about 25%-28%, while that of Comparative Example 1 is 55.7%.

[0086] This result directly verifies the superiority of the zeolite-carbon composite microporous layer as a catalyst support. The stable structure formed by the zeolite framework and carbon materials can effectively resist high-potential impacts and prevent platinum particle agglomeration and detachment caused by carbon support corrosion. More importantly, the "micro-hydrophobic environment" created by the Cs species ensures the timely drainage of reaction water, avoiding the aggravation of localized corrosion caused by "flooding," thus jointly endowing the membrane electrode with an ultra-long service life.

[0087] Performance tests under different humidity conditions directly reflect the adaptability of the membrane electrode in various actual operating environments. Under low humidity conditions, the current density of the embodiments of the present invention at 0.8 V voltage comprehensively and significantly exceeds that of Comparative Example 1. Especially under low humidity (40% RH) conditions, the current density of the embodiments is 0.15-0.18 A / cm², which is about twice that of the comparative example (0.08 A / cm²).

[0088] This result fully demonstrates the core effect of Pt-Cs synergistic catalysis. The introduction of Cs not only optimizes the electronic structure of Pt and enhances its intrinsic catalytic activity, but also creates a micro-hydrophobic environment that facilitates oxygen transport at low humidity and efficiently drains water at high humidity, ensuring that the reactant gas can smoothly reach the catalytic active site under any humidity conditions.

[0089] This invention successfully integrates a highly stable support, a highly efficient catalyst, and intelligent water management functions into a membrane electrode assembly (MEA). Test data convincingly demonstrates that this MEA not only achieves a breakthrough in catalytic activity but also makes significant progress in durability and environmental adaptability, which are crucial for the success of commercial applications. It provides a clear and reliable technical path for developing next-generation high-performance, long-life, and low-cost fuel cells, possessing enormous potential for industrial application.

[0090] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for preparing a Cs precipitated zeolite structure membrane electrode, characterized by, The method comprises the following steps: (1) Preparation of zeolite-carbon composite microporous layer: a. Dissolve soluble carbonate in an aqueous solution containing an organic template and a structure directing agent to form a homogeneous solution; b. Add a titanium source to the solution obtained in step a, continue stirring, and then introduce gaseous silica (SiO2) as a silicon source to obtain a stable aerogel solution; c. Mix the stable aerogel solution obtained in step b with carbon powder, react under high temperature and rotation conditions to obtain a zeolite-carbon composite solution, and further perform alcohol washing, drying and grinding to obtain a zeolite-carbon composite powder as a microporous layer; (2) Preparation and modification of gas diffusion layer: a. The zeolite-carbon composite powder obtained in step (1) is dispersed in an organic solvent to form a slurry, which is coated onto the surface of a substrate to achieve a zeolite-carbon composite microporous layer loading of 1-2 mg / cm 2 , and after drying and heat treatment, a stable gas diffusion layer is obtained; b. Dip the gas diffusion layer obtained in step a in an organic solvent containing a platinum precursor and a cesium salt to adjust the pH value of the solution to an acidic condition of 2-3 using an acid solution; c. After the activation treatment of the solution in step b, add a reducing agent to convert the solution system to an alkaline condition with a pH value of 10-12 to perform a chemical reduction reaction, so that the platinum species and the cesium species are reduced and co-deposited in the zeolite-carbon microporous layer, and after the reaction is completed, dry to obtain a gas diffusion layer modified by platinum and cesium; (3) Membrane electrode assembly: Combine the gas diffusion layer obtained in step (2) and a proton exchange membrane by hot pressing to obtain the Cs modified zeolite-carbon composite membrane electrode.

2. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (1), the soluble carbonate includes one or more of potassium carbonate, sodium carbonate, potassium bicarbonate and sodium bicarbonate; the organic template is N,N,N-trimethyl-1-aminoadamantane hydroxide (TMAdaOH) with a mass concentration of 25%; the structure directing agent is hexamethylene imide (HMI); and the titanium source is tetrabutyl titanate (HBOT).

3. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 2, characterized by, The mass ratio of N,N,N-trimethyl-1-aminoadamantane hydroxide (TMAdaOH) to hexamethylene imide (HMI) ranges from 1:10 to 1:2; and the addition amount of tetrabutyl titanate (HBOT) is 5% to 10% of the mass of hexamethylene imide (HMI).

4. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (1), the addition amount of the carbon powder is 5% to 10% of the total mass of the aerogel solution.

5. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (2), the solid content of the zeolite-carbon composite powder in the slurry is 1% to 2%.

6. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (2), the substrate is carbon paper, and the carbon paper is Toray TGP, Kureha or Avcarb series products.

7. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (2), the platinum precursor is chloroplatinic acid; the cesium salt is cesium carbonate (Cs2CO3); the organic solvent is isopropyl alcohol; and the acid solution is nitric acid (HNO3).

8. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (2), the activation treatment includes microwave irradiation treatment or ultrasonic treatment to promote the penetration and adsorption of active components in the diffusion layer; and the reducing agent is sodium citrate or sodium borohydride.

9. The method for preparing the Cs precipitated zeolite structured film electrode according to claim 1, characterized in that, In step (2), the loading amount of platinum on the gas diffusion layer modified by platinum and cesium is 0.2 mg / cm² to 0.3 mg / cm².

10. The method for preparing a Cs-deposited zeolite structure membrane electrode according to claim 1, characterized by, In step (3), the proton exchange membrane is an expanded polytetrafluoroethylene reinforced composite proton membrane with a thickness of 8 µm to 12 µm.

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