CN117174972A - Membrane electrode for high-temperature proton exchange membrane fuel cell and preparation method and equipment thereof - Google Patents

Abstract

The invention discloses a membrane electrode for a high-temperature proton exchange membrane fuel cell and a preparation method and equipment thereof. A rotating rod is fixedly connected to the output end of the motor, and the rotating rod is arranged through the sealing plate. A plurality of fixed shafts are provided on the outside of the rotating rod, and the plurality of fixed shafts are connected to the rotating rod, and each of the fixed shafts is connected to the rotating rod. Multiple shearing knives are fixedly connected to the side walls of the fixed shaft, and ultrasonic vibrators are fixed to the side walls of the fixed shaft. The present invention uses a catalyst with a higher precious metal content, which is beneficial to reducing the coating thickness under the same precious metal content, thereby improving the coating quality, helping to improve battery performance and reducing the catalyst dosage. Although the total number of catalytic active sites is reduced, However, reducing the coating thickness and adjusting other processes later can ensure good battery performance.

Description

Membrane electrode for high-temperature proton exchange membrane fuel cell and preparation method and equipment thereof

Technical field

The present invention relates to the field of membrane electrodes for fuel cells, and in particular to membrane electrodes for high-temperature proton exchange membrane fuel cells and preparation methods and equipment thereof.

Background technique

As an important application end of hydrogen energy, fuel cells have attracted much attention. As the core component of the fuel cell, the membrane electrode's preparation process directly affects the performance, cost and life of the entire battery stack. At present, there are many studies on membrane electrodes of low-temperature proton exchange membrane fuel cells, but very little attention has been paid to membrane electrodes of high-temperature proton exchange membrane fuel cells.

Different from the membrane electrode structure of low-temperature proton exchange membrane fuel cells, the catalytic layer of the membrane electrode of high-temperature proton exchange membrane fuel cells is generally designed on the gas diffusion layer rather than on both sides of the proton exchange membrane. Therefore, the gas diffusion electrode (GDE) process is often used to prepare membrane electrodes for high-temperature proton exchange membrane fuel cells instead of the catalyst coated membrane (CCM) process.

However, the traditional GDE process has high resistance and low power density, which seriously restricts the application of high-temperature proton exchange membrane fuel cells. In addition, in order to ensure the catalytic activity of the membrane electrode, the previous high-temperature proton exchange membrane fuel cells used a very large amount of catalyst. High (about 2-5 mg/cm2) makes battery manufacturing costs remain high. Therefore, a new preparation process is urgently needed to achieve better battery performance with lower catalyst dosage.

Contents of the invention

The purpose of the invention is to solve the shortcomings existing in the prior art, such as: high resistance and low power density, which seriously restrict the application of high-temperature proton exchange membrane fuel cells. The catalyst dosage is very high, making the battery manufacturing cost high, and The proposed membrane electrode for high-temperature proton exchange membrane fuel cell and its preparation method and equipment.

In order to achieve the above objects, the present invention adopts the following technical solutions:

Preparation equipment for membrane electrodes for high-temperature proton exchange membrane fuel cells, including a configuration box, a sealing plate is fixedly connected to the inside of the configuration box, a motor is fixedly installed on the lower inner wall of the configuration box, and the output end of the motor is fixedly connected There is a rotating rod, and the rotating rod is arranged through the sealing plate. A plurality of fixed shafts are provided on the outside of the rotating rod. The plurality of fixed shafts are connected to the rotating rod. The side wall of each fixed shaft is provided with a rotating rod. Multiple shearing knives are fixedly connected, an ultrasonic vibrator is fixedly provided on the side wall of the fixed shaft, a connecting shaft is provided at the top of the fixed shaft, and a fixed gear is fixedly connected to the top of each connecting shaft. A fixed ring gear is fixedly connected to the upper inner wall of the configuration box, and the fixed ring gear meshes with each fixed gear.

Preferably, a connecting cavity is provided at the bottom end of each fixed shaft, a moving plate is slidably connected to the inside of each connecting cavity, and a connecting rod is fixedly connected to the bottom end of each moving plate. The connecting rod penetrates the lower inner wall of the connecting cavity and extends to the outside of the fixed shaft. The bottom end of each connecting rod is fixedly connected with a connecting pad, and the bottom end of each connecting pad is connected to the sealing plate. The tops of each of the moving plates are arranged next to each other. The top of each of the moving plates is fixedly connected with a connecting spring. One end of each of the connecting springs away from the corresponding moving plate is fixedly connected to the upper inner wall of the connecting cavity. The surface of the connecting pad Smooth setting, and the connecting pad is made of hard rubber.

Preferably, a sliding groove is provided at the top of the fixed shaft, the connecting shaft extends through the upper inner wall of the sliding groove to the interior of the sliding groove, and the connecting shaft is slidably connected to the inner wall of the sliding groove, and the connecting shaft is slidably connected to the inner wall of the sliding groove. An elastic rod is fixedly connected to the bottom end of the connecting shaft, and one end of the elastic rod away from the connecting shaft is fixedly connected to the lower inner wall of the sliding groove.

Preferably, a plurality of installation rods are fixedly connected to the side wall of the rotating rod, each of the installation rods corresponds to a fixed shaft, and the end of each of the installation rods is fixedly connected with an installation sleeve, Each of the mounting sleeves is rotatably mounted on the outside of a fixed shaft.

A method for preparing membrane electrodes for high-temperature proton exchange membrane fuel cells, including the following steps:

S1, mix and stir the catalyst, ultrapure water, solvent and resin to prepare a membrane electrode slurry. The catalyst is a Pt-based precious metal carbon supported catalyst. The precious metal content of the catalyst is greater than 40%. The solvent and ultrapure water The ratio is (1-4): (6-9), and the solid content of the membrane electrode slurry is 5-20%;

S2: Disperse the membrane electrode slurry, control the temperature to 5-15°C, so that the D50 particle size of the membrane electrode slurry is 0.5-1.5 microns, and then apply slit coating to the membrane electrode slurry The gas diffusion coating is obtained by coating on the gas diffusion layer, and is dried to obtain a gas diffusion electrode with a precious metal content of 0.5-2 mg/cm2;

S3: Place the two gas diffusion electrodes on both sides of the high-temperature proton exchange membrane respectively, and combine them together with the sealing member by hot pressing, bonding or pasting to obtain a high-temperature proton exchange membrane membrane electrode.

Preferably, the coating thickness of the gas diffusion coating is 0.05-0.75 mm, the drying temperature is 50-100°C, and the time is 1-15 min.

Preferably, the solvent is at least one of methanol, ethanol, ether, n-propanol, and isopropanol, the resin is at least one of PTFE, PVDF, PBI, Nafion, and PVA, and the dispersion treatment is At least one of ultrasound, high-speed shearing, high-pressure shearing, and high-pressure micro-jet.

Preferably, the cathode and anode terminal plates and the cathode and anode pole plates are respectively placed on both sides of the high-temperature proton exchange membrane membrane electrode, and together with the seals, they are mechanically pressed to assemble a high-temperature proton exchange membrane fuel cell.

Compared with the prior art, the beneficial effects of the present invention are:

1. Using a catalyst with a higher precious metal content is beneficial to reducing the coating thickness under the same precious metal content, thereby improving the coating quality, which is helpful to improve battery performance and reduce the amount of catalyst. Although the total number of catalytic active sites is reduced, However, reducing the coating thickness and adjusting other processes later can ensure good battery performance.

2. Using a formula with a low ratio of solvent to ultrapure water is beneficial to the mixing and stirring of the membrane electrode slurry, and is safer than a formula with a high ratio of solvent to ultrapure water during slurry preparation.

3. The use of a low solvent to ultrapure water ratio formula is beneficial to the uniformity of drying when the coating thickness is moderate.

4. Use ultrasonic shearing dispersion processing to control the D50 particle size to approximately 0.5-1.5 microns. This particle size is beneficial to improving battery performance.

5. This equipment uses ultrasonic waves to rotate the shearing knife to stir and shear the particles in the solvent. The shearing knife also rotates while rotating, which greatly improves the shearing effect.

Description of drawings

Figure 1 is a schematic structural diagram of the preparation equipment for membrane electrodes for high-temperature proton exchange membrane fuel cells proposed by the present invention;

Figure 2 is an enlarged view of point A in Figure 1;

Figure 3 is a schematic three-dimensional structural diagram of the shearing blade of the membrane electrode preparation equipment for high-temperature proton exchange membrane fuel cells proposed by the present invention;

In the picture: 1 configuration box, 2 sealing plate, 3 motor, 4 rotating rod, 5 fixed shaft, 6 shearing knife, 7 connecting shaft, 8 sliding groove, 9 fixed gear, 10 fixed ring gear, 11 ultrasonic vibrator, 12 Connecting rod, 13 connecting cavity, 14 moving plate, 15 connecting spring, 16 connecting pad, 17 mounting rod, 18 mounting sleeve.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention.

Referring to Figures 1 to 3, the equipment for preparing membrane electrodes for high-temperature proton exchange membrane fuel cells includes a configuration box 1. A sealing plate 2 is fixedly connected to the interior of the configuration box 1, and a motor 3 is fixedly installed on the lower inner wall of the configuration box 1. The output end of the motor 3 is fixedly connected with a rotating rod 4. The rotating rod 4 is provided through the sealing plate 2. A plurality of fixed shafts 5 are provided on the outside of the rotating rod 4. The plurality of fixed shafts 5 are connected to the rotating rod 4, and each fixed shaft 5 is connected to the rotating rod 4. Multiple shearing knives 6 are fixedly connected to the side walls of the shaft 5. An ultrasonic vibrator 11 is fixedly provided on the side wall of the fixed shaft 5. A connecting shaft 7 is provided at the top of the fixed shaft 5. The top of each connecting shaft 7 is Fixed gears 9 are all fixedly connected, and a fixed ring gear 10 is fixedly connected to the upper inner wall of the configuration box 1. The fixed ring gear 10 meshes with each fixed gear 9. Pour the membrane electrode slurry into the configuration box 1 and start. Motor 3. The output end of the motor 3 drives the rotating rod 4 to rotate, thereby causing multiple fixed anchors 5 to rotate around the rotating rod 4, driving multiple shearing knives 6 to rotate accordingly. At the same time, when the shearing knives 6 rotate, the connecting shaft 7 follows. The rotation drives the fixed gear 9 to rotate around the rotating rod 4. Under the action of the fixed ring gear 10, the fixed gear 9 will also rotate when it revolves, thereby causing the shearing knife 6 to rotate. Moreover, after the ultrasonic vibrator 11 is started, the shearing knife 6 will rotate. The cutter 6 vibrates violently, stirring and shearing the solvent, so that the various components in the membrane electrode slurry are evenly mixed;

A connecting cavity 13 is provided at the bottom end of each fixed shaft 5 . A moving plate 14 is slidably connected to the inside of each connecting cavity 13 . A connecting rod 12 is fixedly connected to the bottom end of each moving plate 14 . Each connecting rod 12 The lower inner wall of the connecting cavity 13 extends to the outside of the fixed shaft 5. The bottom end of each connecting rod 12 is fixedly connected with a connecting pad 16. The bottom end of each connecting pad 16 is connected to the top of the sealing plate 2. The top of each moving plate 14 is fixedly connected with a connecting spring 15, and one end of each connecting spring 15 away from the corresponding moving plate 14 is fixedly connected to the upper inner wall of the connecting cavity 13; the surface of the connecting pad 16 is smooth. , and the connecting pad 16 is made of hard rubber. The connecting rod 12 and the moving plate 14 cooperate to enable the fixed shaft 5 to vibrate, and the connecting spring 15 can amplify the vibration, further increasing the vibration, and the connecting pad 16 can protect The connecting rod 12 will not be damaged;

A sliding groove 8 is provided at the top of the fixed shaft 5. The connecting shaft 7 penetrates the upper inner wall of the sliding groove 8 and extends to the interior of the sliding groove 8. The connecting shaft 7 is slidingly connected to the inner wall of the sliding groove 8. The connecting shaft 7 is The bottom end is fixedly connected with an elastic rod, and the end of the elastic rod away from the connecting shaft 7 is fixedly connected to the lower inner wall of the sliding groove 8 so that the vibration of the fixed shaft 5 will not affect the connecting shaft 7;

A plurality of installation rods 17 are fixedly connected to the side wall of the rotating rod 4. Each installation rod 17 corresponds to a fixed shaft 5. The end of each installation rod 17 is fixedly connected with an installation sleeve 18. Each installation rod 17 is fixedly connected to the side wall of the rotating rod 4. The sleeves 18 are all rotated and set on the outside of a fixed shaft 5, connecting the rotating rod 4 with the fixed shaft 5;

Membrane electrode for high-temperature proton exchange membrane fuel cell and its preparation method, including the following steps:

S1, mix and stir the catalyst, ultrapure water, solvent and resin to prepare a membrane electrode slurry. The catalyst is a Pt-based precious metal carbon supported catalyst. The precious metal content of the catalyst is greater than 40%. The solvent and ultrapure water The ratio is (1-4): (6-9), the solid content of the membrane electrode slurry is 5-20%; the solvent can be methanol, ethanol, ether, n-propanol, or isopropanol, and the resin can be PTFE , PVDF, PBI, Nafion, and PVA are available;

S2: Disperse the membrane electrode slurry, control the temperature to 5-15°C, so that the D50 particle size of the membrane electrode slurry is 0.5-1.5 microns, and then apply slit coating to the membrane electrode slurry The gas diffusion coating is obtained by coating on the gas diffusion layer, and is dried to obtain a gas diffusion electrode with a precious metal content of 0.5-2 mg/cm2;

S3, place the two gas diffusion electrodes on both sides of the high-temperature proton exchange membrane respectively, and combine them together with the seals by hot pressing, bonding or pasting to obtain a high-temperature proton exchange membrane membrane electrode;

The coating thickness of the gas diffusion coating is 0.05-0.75 mm, the drying temperature is 50-100°C, and the time is 1-15 min; the dispersion treatment is ultrasonic shearing;

Embodiment 1: Referring to Figures 1-3,

Low loading capacity, low solvent to ultrapure water ratio, high noble metal content catalyst, ultra-small particle size preparation:

(1) Mix and stir 46% Pt/C catalyst, ultrapure water, isopropyl alcohol and PTFE resin in a ratio of 2:21:9:1 to prepare a membrane electrode slurry;

(2) The membrane electrode slurry is subjected to ultrasonic crushing and dispersion treatment for a total of 30 minutes, and the temperature is controlled to 10°C;

(3) Use a slit coater to coat the dispersed membrane electrode slurry on the gas diffusion layer and control the coating thickness to 0.2-0.4 mm, and then dry it at 80°C for 10 minutes. After that, a gas diffusion electrode with a precious metal content of about 1 mg/cm2 is obtained.

Embodiment 2: Referring to Figures 1-3,

Low loading capacity, low solvent to ultrapure water ratio, high noble metal content catalyst, small particle size preparation:

(1) Mix and stir 46% Pt/C catalyst, ultrapure water, isopropyl alcohol and PTFE resin in a ratio of 2:21:9:1 to prepare a membrane electrode slurry;

(2) The membrane electrode slurry is subjected to ultrasonic dispersion treatment for 30 minutes, and the temperature is controlled to 10°C;

(3) Use a slit coater to coat the dispersed membrane electrode slurry on the gas diffusion layer and control the coating thickness to 0.2-0.4 mm, and then dry it at 80°C for 10 minutes. After that, a gas diffusion electrode with a precious metal content of about 1 mg/cm2 is obtained.

Embodiment 3: Referring to Figures 1-3,

Low loading capacity, low solvent to ultrapure water ratio, low precious metal content catalyst, ultra-small particle size preparation:

(1) Mix and stir 20% Pt/C catalyst, ultrapure water, isopropyl alcohol and PTFE resin in a ratio of 1.2:15.9:6.8:1 to prepare a membrane electrode slurry;

(2) The membrane electrode slurry is subjected to ultrasonic crushing and dispersion treatment for a total of 30 minutes, and the temperature is controlled to 10°C;

(3) Use a slit coater to coat the dispersed membrane electrode slurry on the gas diffusion layer and control the coating thickness to 0.8-1.0 mm, and then dry it at 80°C for 15 minutes. After that, a gas diffusion electrode with a Pt loading of approximately 1 mg/cm2 is obtained.

Obviously, under the same platinum loading requirement, the coating thickness is much thicker when using 20% catalyst than when using 46% Pt/C catalyst.

Embodiment 4: Referring to Figures 1-3,

Low loading capacity, general solvent to ultrapure water ratio, high noble metal content catalyst, ultra-small particle size preparation:

(1) Mix and stir 46% Pt/C catalyst, ultrapure water, isopropyl alcohol and PTFE resin in a ratio of 2:9:21:1 to prepare a membrane electrode slurry;

(2) The membrane electrode slurry is subjected to ultrasonic crushing and dispersion treatment for a total of 30 minutes, and the temperature is controlled to 10°C;

(3) Use a slit coater to coat the dispersed membrane electrode slurry on the gas diffusion layer and control the coating thickness to 0.2-0.4 mm, and then dry it at 80°C for 10 minutes. After that, a gas diffusion electrode with a precious metal content of about 1 mg/cm2 is obtained.

Embodiment 5: Referring to Figures 1-3,

High loading capacity, general solvent to ultrapure water ratio, low precious metal content catalyst, small particle size preparation:

(1) Mix and stir 20% Pt/C catalyst, ultrapure water, isopropyl alcohol and PTFE resin in a ratio of 1.2:14:9:1 to prepare a membrane electrode slurry;

(2) The membrane electrode slurry is subjected to ultrasonic dispersion treatment for 30 minutes, and the temperature is controlled to 10°C;

(3) Use a slit coater to coat the dispersed membrane electrode slurry on the gas diffusion layer and control the coating thickness to 1.2-1.5 mm, and then dry it at 80°C for 10 minutes. After that, a gas diffusion electrode with a precious metal content of about 1.5 mg/cm2 is obtained.

In the present invention, a catalyst, ultrapure water, a solvent and a resin are mixed and stirred to prepare a membrane electrode slurry. The catalyst is a Pt-based noble metal carbon-supported catalyst. The precious metal content of the catalyst is greater than 40%. The solvent and ultrapure water are mixed and stirred to prepare a membrane electrode slurry. The ratio of pure water is (1-4): (6-9), the solid content of the membrane electrode slurry is 5-20%, the membrane electrode slurry is dispersed, and the slurry is passed into the configuration box 1 Inside, start the motor 3, and the output end of the motor 3 drives the rotating rod 4 to rotate, so that the plurality of fixed anchors 5 rotate around the rotating rod 4, driving the multiple shearing knives 6 to rotate accordingly, and at the same time, the connecting shaft is connected when the shearing knives 6 rotate. 7 rotates accordingly, driving the fixed gear 9 to rotate around the rotating rod 4. Under the action of the fixed ring gear 10, the fixed gear 9 will also rotate when it revolves, thus causing the shearing knife 6 to rotate. Moreover, after the ultrasonic vibrator 11 is started, With the cooperation of the connecting rod 12 and the moving plate 14, the shearing knife 6 vibrates violently, and the connecting spring 15 can amplify the vibration, further increase the vibration, stir and shear the solvent, and remove the various components in the solvent. Mix evenly, control the temperature to 5-15°C, so that the D50 particle size of the membrane electrode slurry is 0.5-1.5 microns, and then apply the membrane electrode slurry on the gas diffusion layer using slit coating to obtain gas Diffusion coating and drying process to obtain a gas diffusion electrode with a precious metal content of 0.5-2 mg/cm2. Two pieces of the gas diffusion electrode are placed on both sides of the high-temperature proton exchange membrane, and together with the seal, they are hot pressed , bonded or pasted together to obtain a high-temperature proton exchange membrane membrane electrode;

Take two pieces of gas diffusion electrodes prepared in Example 1, each piece is 5*5cm2, place the gas diffusion electrodes on both sides of the high-temperature proton exchange membrane, and combine them together with the seals through hot pressing to form a membrane electrode. , and then assemble the membrane electrode together with other accessories such as plates, end plates, seals and other accessories into a high-temperature proton exchange membrane fuel cell, marked as battery 1, and test its performance;

Using the same method, the gas diffusion electrodes prepared in Example 2 to Comparative Example were assembled into high-temperature proton exchange membrane fuel cells, which were marked as cells 2, 3, 4, and 5 respectively, and their performance was tested.

The test results are as follows:

Obviously, the battery 1 prepared in Example 1 shows a significantly higher power density than a general battery (less than 0.4 W/cm2).

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (8)

1. Preparation equipment for membrane electrodes for high-temperature proton exchange membrane fuel cells, including a configuration box (1), characterized in that a sealing plate (2) is fixedly connected to the interior of the configuration box (1), and the configuration box (1) ) is fixed with a motor (3) on the lower inner wall, and the output end of the motor (3) is fixedly connected with a rotating rod (4). The rotating rod (4) is provided through the sealing plate (2). The rotating rod A plurality of fixed shafts (5) are provided on the outside of (4). The plurality of fixed shafts (5) are connected to the rotating rod (4), and the side walls of each fixed shaft (5) are fixedly connected. There are multiple shearing knives (6), an ultrasonic vibrator (11) is fixed on the side wall of the fixed shaft (5), and a connecting shaft (7) is provided on the top of the fixed shaft (5). The top ends of the connecting shafts (7) are fixedly connected with fixed gears (9), and the upper inner wall of the configuration box (1) is fixedly connected with a fixed ring gear (10). The fixed ring gear (10) is connected with each The fixed gears (9) all mesh with each other. 2. The preparation equipment for membrane electrodes for high-temperature proton exchange membrane fuel cells according to claim 1, characterized in that a connection cavity (13) is provided at the bottom end of each fixed shaft (5), and each A moving plate (14) is slidably connected to the inside of the connecting cavity (13), a connecting rod (12) is fixedly connected to the bottom end of each moving plate (14), and each connecting rod (12) is connected through The lower inner wall of the cavity (13) extends to the outside of the fixed shaft (5). The bottom end of each connecting rod (12) is fixedly connected with a connecting pad (16), and each connecting pad (16) is fixedly connected to the bottom end of the connecting rod (12). The bottom ends of 16) are arranged close to the top of the sealing plate (2). The top of each moving plate (14) is fixedly connected with a connecting spring (15), and each connecting spring (15) is away from the corresponding One end of the moving plate (14) is fixedly connected to the upper inner wall of the connecting cavity (13). The surface of the connecting pad (16) is smooth and made of hard rubber. 3. The preparation equipment for membrane electrodes for high-temperature proton exchange membrane fuel cells according to claim 1, characterized in that a sliding groove (8) is provided at the top end of the fixed shaft (5), and the connecting shaft (5) 7) The upper inner wall of the sliding groove (8) extends to the interior of the sliding groove (8), and the connecting shaft (7) is slidingly connected to the inner wall of the sliding groove (8). An elastic rod is fixedly connected to the bottom end, and one end of the elastic rod away from the connecting shaft (7) is fixedly connected to the lower inner wall of the sliding groove (8). 4. The membrane electrode preparation equipment for high-temperature proton exchange membrane fuel cells according to claim 1, characterized in that, a plurality of mounting rods (17) are fixedly connected to the side wall of the rotating rod (4), each of which is The mounting rods (17) respectively correspond to a fixed shaft (5). The end of each mounting rod (17) is fixedly connected with a mounting sleeve (18). Each mounting sleeve (18) ) are installed on the outer side of a fixed shaft (5). 5. A method for preparing membrane electrodes for high-temperature proton exchange membrane fuel cells, which is characterized by comprising the following steps: S1, mix and stir the catalyst, ultrapure water, solvent and resin to prepare a membrane electrode slurry. The catalyst is a Pt-based precious metal carbon supported catalyst. The precious metal content of the catalyst is greater than 40%. The solvent and ultrapure water The ratio is (1-4): (6-9), and the solid content of the membrane electrode slurry is 5-20%; S2: Disperse the membrane electrode slurry, control the temperature to 5-15°C, so that the D50 particle size of the membrane electrode slurry is 0.5-1.5 microns, and then apply slit coating to the membrane electrode slurry The gas diffusion coating is obtained by coating on the gas diffusion layer, and is dried to obtain a gas diffusion electrode with a precious metal content of 0.5-2 mg/cm2; S3: Place the two gas diffusion electrodes on both sides of the high-temperature proton exchange membrane respectively, and combine them together with the sealing member by hot pressing, bonding or pasting to obtain a high-temperature proton exchange membrane membrane electrode. 6. The method for preparing membrane electrodes for high-temperature proton exchange membrane fuel cells according to claim 5, characterized in that the coating thickness of the gas diffusion coating is 0.05-0.75 mm, and the drying temperature is 50-0.75 mm. 100 ℃, time is 1-15min. 7. The method for preparing membrane electrodes for high-temperature proton exchange membrane fuel cells according to claim 5, wherein the solvent is at least one of methanol, ethanol, diethyl ether, n-propanol, and isopropanol. The resin is at least one of PTFE, PVDF, PBI, Nafion, and PVA, and the dispersion treatment is at least one of ultrasonic, high-speed shearing, high-pressure shearing, and high-pressure micro-jet. 8. High-temperature proton exchange membrane fuel cell, characterized in that, using the preparation method of membrane electrodes for high-temperature proton exchange membrane fuel cells according to claim 5, the cathode and anode end plates and the cathode and anode plates are respectively placed on the high-temperature proton exchange membrane membrane. The two sides of the electrode, together with the seals, are mechanically pressed together to form a high-temperature proton exchange membrane fuel cell.