Evaluation method of printing ink performance of proton exchange membrane fuel cell

Abstract

The invention discloses a method for evaluating the ink performance of a proton exchange membrane fuel cell, and relates to the technical field of proton exchange membrane fuel cell detection. The method mainly adopts an electrochemical workstation to perform performance test on the dispersed slurry, simulates stress conditions under specific working conditions, effectively distinguishes electrochemical active area attenuation caused by ionomer agglomeration and platinum particle separation in the slurry in combination with electrochemical response differences, and is relatively high in test result precision, short in period and high in accuracy. And the slurry development marginal cost can be obviously reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of proton exchange membrane fuel cell detection, and in particular to a method for evaluating the performance of proton exchange membrane fuel cell ink. Background Technique

[0002] A proton exchange membrane fuel cell is an efficient and clean energy conversion device that directly converts the chemical energy of hydrogen into electrical energy. Its core feature is the use of a proton exchange membrane (PEM) as the electrolyte, with advantages such as fast startup, high efficiency, and low-temperature operation, making it one of the key technologies in the field of hydrogen energy application. The catalytic layer is the site where the electrochemical reaction between hydrogen and oxygen occurs to generate current in the fuel cell, and it is the core of the fuel cell. It mainly consists of a platinum-based catalyst, an ionomer, and a pore region. The conductive carrier conducts electrons, the ionomer conducts protons, and the pores transport the reaction gases, which are crucial for the performance of the fuel cell. The catalytic layer directly determines the efficiency, cost, lifespan, and applicable scenarios of the fuel cell. Its optimization needs to consider catalytic activity, mass transfer efficiency, durability, and economy, and it is one of the core challenges for the fuel cell technology to move from the laboratory to large-scale commercialization.

[0003] The microstructure of the catalytic layer is mainly determined by the ink performance and the catalytic layer preparation process. Ink with good performance is a prerequisite for preparing an excellent catalytic layer. In the detection of ink performance, the performance, dispersion, and utilization rate of the platinum-based catalyst have always been the focus of ink development. The dispersion degree of the catalyst in the ink directly affects its electrochemical performance and utilization rate. Currently, techniques such as transmission electron microscopy (TEM) and X-ray diffraction (XRD) of the catalytic layer are generally used to detect the dispersion of the catalyst in the ink, and then evaluate the reduction of the active sites in the catalytic layer caused by catalyst agglomeration. This method has advantages such as accuracy and intuitiveness, but it is necessary to prepare the ink into a catalytic layer, so there may be an impact on the catalyst morphology by the catalytic layer spraying or direct coating process. In addition, this method must use professional instruments, which is costly in the actual development process.

[0004] Electrochemical performance detection is another important means for evaluating the performance of proton exchange membrane fuel cell ink. By performing a CV test on the ink to calculate the electrochemical area, the dispersion status of the catalyst is indirectly evaluated through the platinum active sites. However, it is found in the actual operation process that due to the influence of the formulation and dispersion equipment, the agglomeration of the ionomer in the ink and the detachment of platinum nanoparticles from the carbon carrier will both result in a smaller electrochemically active surface area (ECSA) during the final electrochemical performance test. It is impossible to distinguish the specific reasons only from the results, and it is still necessary to further observe the ionomer distribution through transmission electron microscopy (TEM), etc.

[0005] During the development of proton exchange membrane fuel cell inks, the agglomeration of ionomers is mainly due to the poor compatibility between ionomers and solvents, insufficient stirring or ultrasonic dispersion of the slurry, resulting in the failure of ionomers to uniformly coat the catalyst, or the excessive mass ratio of ionomers to the catalyst; while the detachment of platinum nanoparticles is mainly due to excessive mechanical shear force (such as high-speed ball milling) during the slurry preparation process, which destroys the binding between the catalyst and the carrier. Although they both lead to a reduction in the active sites of the catalyst, the solutions are different. Accurately distinguishing the causes is crucial for the subsequent targeted modification of the ink. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned existing technologies and provide a method for evaluating the performance of proton exchange membrane fuel cell inks, which simulates the stress conditions under specific working conditions, combines the differences in electrochemical responses, and effectively distinguishes the attenuation of the electrochemically active area (ECSA) caused by the agglomeration of ionomers and the detachment of platinum (Pt) particles in the slurry, so as to optimize the ink targeted subsequently.

[0007] The purpose of the present invention can be achieved by the following technical solutions: The present invention provides a method for evaluating the performance of proton exchange membrane fuel cell inks, comprising the following steps: S1. Prepare the proton exchange membrane fuel cell ink according to the original formula; S2. Add the ink to a glassy carbon electrode, dry it, and then conduct an initial electrochemical performance test to obtain a CV curve; S3. Perform an accelerated aging test on the ink by using a triangular wave potential cycle, and after the test is completed, test the electrochemical performance CV curve again; S4. Calculate the full width at half maximum of the hydrogen desorption region of the CV curve before and after the accelerated aging; S5. Distinguish the type of attenuation of the electrochemically active area of the ink according to the change value of the full width at half maximum.

[0008] In some embodiments of the present invention, in step S1, the ink comprises a catalyst, an ionomer, water, and an organic alcohol; The catalyst is a platinum-carbon catalyst with a mass ratio of 50%, and the platinum-carbon catalyst is selected from Tanaka TEC10E50E, Umicore Pt0550, or Platinum Source Catalysis AD50; The ionomer is a perfluorosulfonic acid resin, and the perfluorosulfonic acid resin is selected from DuPont D0520, DuPont D2020, Solvay72, or Solvay79; The organic alcohol is selected from at least one of isopropanol, ethanol, ethylene glycol, n-butanol, and n-propanol.

[0009] Further, the mass ratio of water∶organic alcohol∶ionomer∶catalyst is 9-50∶10-50∶8-12∶1, and the total solid content of the catalyst and ionomer in the ink is 1%-20%. More preferably, the mass ratio of water∶organic alcohol∶ionomer∶catalyst is 9-14∶10-14∶8-12∶1.

[0010] In some embodiments of the present invention, in step S1, the ink is dispersed using a high-pressure homogenizer, the homogenization pressure is 800-1200 Pa, the motor frequency is 10-40 Hz, the homogenization time is 5-20 min, and the temperature is controlled between 5-10 °C using circulating cooling water.

[0011] In some embodiments of the present invention, in step S2, the diameter of the glassy carbon electrode is 5 mm, and the ink sampling amount is 2-5 μL; During the electrochemical performance test, it is placed in an electrolyte solution for testing. The electrolyte solution is 1 mol / L H2SO4 solution, and nitrogen is bubbled for 30-60 min before the test; Relative to the reversible hydrogen electrode RHE, the potential range for testing is 0.05 V-1.2 V, The scanning rate for testing is 20 mV / s.

[0012] Further, the electrochemical performance test uses a three-electrode system, wherein the reference electrode is a calomel electrode and the counter electrode is a platinum sheet electrode.

[0013] In some embodiments of the present invention, in step S3, relative to the reversible hydrogen electrode RHE, the potential range for triangular wave potential cycling is 0.4 V-1.4 V, The scanning rate for triangular wave potential cycling is 100 mV / s; During accelerated aging, the ink is placed in an electrolyte solution. The electrolyte solution is 1 mol / L H2SO4 solution, and the number of cycles for triangular wave potential cycling is 1000.

[0014] Preferably, the calculation of the full width at half maximum in step S4 specifically includes: Identifying the peak current I of the hydrogen desorption peak peak ; Determining the baseline current I baseline ; Calculating the current I at half peak height half : I half = (I peak - I baseline ) / 2 + I baseline ; Based on I half Determining the left potential E left and the right potential E right ; Calculating the full width at half maximum E half : E half = |E left - E right |.

[0015] As an optimal solution, in step S5, in comparison with the design objectives, calculate the full width at half maximum after the accelerated aging test, and combine data analysis to analyze the agglomeration of ionomers and the detachment of platinum (Pt) particles in the slurry, resulting in the attenuation of the electrochemically active surface area (ECSA), and then conduct targeted optimization of the ink subsequently.

[0016] If the full width at half maximum of the CV curve of the accelerated aging test increases significantly, it indicates that the attenuation is mainly caused by the agglomeration of ionomers; If the full width at half maximum of the CV curve of the accelerated aging test decreases, it indicates that the attenuation is mainly caused by the detachment of platinum particles.

[0017] If the above situation does not exist, it indicates that the performance detection of the ink slurry passes; if it is the above situation, according to the attenuation type, update the ink formula or dispersion process to re-prepare the slurry, and continue the detection after preparation until the performance detection passes.

[0018] The fuel cell slurry test is a bridge connecting material science and engineering applications. Through systematic tests in multiple scales and multiple physical fields, the R & D cycle can be significantly shortened, the mass production yield can be improved, and the industry can be promoted towards the direction of low cost and high durability. The slurry is the core material of the catalyst layer (CL), and the ratio and dispersion uniformity of its components (such as catalysts, ionomers, solvents) directly affect the reaction activity of the electrode. During the dispersion process of the fuel cell slurry, the agglomeration of ionomers will lead to uneven resin dispersion, affecting the three-phase interface distribution of catalysts, ionomers and gases, and further affecting the catalyst activity and utilization rate, resulting in a reduction in its electrochemically active area; in addition, excessive dispersion of the slurry will reduce the instability of the catalyst carrier, and during actual operation, especially under the action of high potential, it will cause the platinum nanoparticles to detach from the carbon carrier during operation, also resulting in a reduction in the electrochemically active area. Although the results are similar, the causes are completely different; the existing slurry detection methods, including viscosity, rheology, thixotropy and other tests, mainly test the material properties of the slurry after dispersion, and cannot directly distinguish the agglomeration of ionomers and the shedding of platinum nanoparticles. It is necessary to further use characterization methods such as scanning electron microscopy + energy dispersive spectrometer (SEM-EDS) and laser particle size analyzer to determine the distribution uniformity and particle size distribution of ionomers. The development time cost of such methods is too high, and the equipment cost is expensive.

[0019] The present invention mainly uses an electrochemical workstation to test the performance of the dispersion slurry, simulates the stress conditions under specific working conditions, and combines the differences in electrochemical responses to effectively distinguish the attenuation of the electrochemically active area (ECSA) caused by the agglomeration of ionomers and the detachment of platinum (Pt) particles in the slurry. The test results have high precision and short cycle, and can significantly reduce the marginal cost of slurry development. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic flow chart of the present invention.

[0021] Figure 2 It is the CV curve atlas before and after the durability test of Example 1.

[0022] Figure 3 It is the CV curve atlas before and after the durability test of Example 2.

[0023] Figure 4 It is the CV curve atlas before and after the durability test of Example 3.

[0024] Figure 5 It is the CV curve atlas before and after the durability test of Example 4.

[0025] Figure 6 It is a schematic diagram for calculating the half-peak width of the example. SPECIFIC EMBODIMENTS

[0026] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Example 1

[0028] Weigh 1 g of Tanaka TEC10E50E catalyst (50% Pt / C) into a beaker, add 14 g of deionized water, and stir with a glass rod until the catalyst is completely wetted; then weigh 14 g of n-propanol and 8 g of perfluorosulfonic acid resin DuPont D0520 in sequence with an electronic balance. The mixture is pretreated by ultrasonic for 30 minutes and then transferred to a high-pressure homogenizer; during the operation of the high-pressure homogenizer, turn on the circulating cooling water to maintain the working temperature of the equipment (5 - 10°C), set the high-pressure homogenization pressure to 800 Pa, the motor frequency to 25 Hz, and perform high-pressure homogenization treatment on the slurry for 5 minutes.

[0029] Collect the materials in a small beaker and then conduct electrochemical performance tests on them. Among them, the electrolyte is a 1mol / L H2SO4 solution. Before testing, bubble with high-purity nitrogen for 30 min to remove the oxygen in the electrolyte. Use a pipette to transfer 2 μL of the slurry and drop it onto a glassy carbon electrode (with a diameter of 5 mm). After natural drying, transfer it to a disk electrode for testing. Among them, the reference electrode is a calomel electrode, the counter electrode is a platinum sheet electrode, and the electrochemical performance CV test is carried out in the range of 0.05V - 1.2V (relative to the reversible hydrogen electrode RHE), and the scanning rate is 20 mV / s.

[0030] After the initial performance test is completed, reset the triangular wave cycle parameters and conduct an accelerated aging test at 0.4V - 1.4V (relative to the reversible hydrogen electrode RHE). The number of test cycles is 1000 cycles, and the scanning rate is 100 mV / s. After the test results are obtained, conduct the electrochemical performance CV test on it again. After the CV performance test of the slurry is completed, calculate the full width at half maximum on the graph to test the changes before and after the accelerated aging.

[0031] Among them, calculate the full width at half maximum of the CV curves before and after the accelerated aging. The selected area is the hydrogen desorption peak, and identify the peak current I of the hydrogen desorption peak peak ; Determine the baseline current I baseline ; Then calculate the current at half maximum height I according to the formula half : I half = (I peak - I baseline ) / 2 + I baseline ; Then, according to the current at half maximum height, determine the half-peak potential point from the CV curve graph, that is, the potential value corresponding to when the current is equal to the current at half maximum (left potential E left and right potential E right ); Calculate the full width at half maximum E half : E half = |E left - E right |.

[0032] Example 2

[0033] Weigh 1 g of Tanaka TEC10E50E catalyst (50% Pt / C) into a beaker, add 14 g of deionized water, and stir with a glass rod until the catalyst is completely wetted; then weigh 14 g of n-propanol and 8 g of DuPont perfluorosulfonic acid resin D0520 in sequence with an electronic balance. Ultrasonically pretreat the mixture for 30 minutes, and then transfer it to a high-pressure homogenizer; during the operation of the high-pressure homogenizer, turn on the circulating cooling water to maintain the working temperature of the equipment (5 - 10 °C), set the high-pressure homogenization pressure to 800 Pa, and the motor frequency to 25 Hz, and conduct high-pressure homogenization treatment of the slurry for 20 min.

[0034] Collect the materials in a small beaker and then conduct electrochemical performance tests on them. Among them, the electrolyte is 1 mol / L H2SO4 solution. Before the test, bubble with high-purity nitrogen for 30 min to remove the oxygen in the electrolyte. Use a pipette to transfer 2 μL of the slurry and drop it onto a glassy carbon electrode (with a diameter of 5 mm). After natural drying, transfer it to a disk electrode for testing. Among them, the reference electrode is a calomel electrode, and the counter electrode is a platinum sheet electrode. For the CV test of electrochemical performance, the interval is 0.05 V - 1.2 V (relative to the reversible hydrogen electrode RHE), and the scanning rate is 20 mV / s.

[0035] After the initial performance test is completed, reset the triangular wave cycle parameters and conduct an accelerated aging test at 0.4 V - 1.4 V (relative to the reversible hydrogen electrode RHE). The number of test cycles is 1000 cycles, and the scanning rate is 100 mV / s. After the test results are obtained, conduct the CV test of electrochemical performance again. After the CV performance test of the slurry is completed, calculate the full width at half maximum on the spectrum to test the changes before and after accelerated aging.

[0036] Example 3

[0037] Weigh 1 g of Tanaka TEC10E50E catalyst (50% Pt / C) in a beaker, add 14 g of deionized water, and stir with a glass rod until the catalyst is completely wetted. Then, weigh 14 g of n-propanol and 8 g of DuPont perfluorosulfonic acid resin D0520 in sequence with an electronic balance. Ultrasonically pretreat the mixture for 30 minutes, and then transfer it to a high-pressure homogenizer. During the operation of the high-pressure homogenizer, turn on the circulating cooling water to maintain the working temperature of the equipment (5 - 10 °C). Set the high-pressure homogenization pressure to 1200 Pa and the motor frequency to 25 Hz, and conduct high-pressure homogenization treatment of the slurry for 20 min.

[0038] Collect the materials in a small beaker and then conduct electrochemical performance tests on them. Among them, the electrolyte is 1 mol / L H2SO4 solution. Before the test, bubble with high-purity nitrogen for 30 min to remove the oxygen in the electrolyte. Use a pipette to transfer 2 μL of the slurry and drop it onto a glassy carbon electrode (with a diameter of 5 mm). After natural drying, transfer it to a disk electrode for testing. Among them, the reference electrode is a calomel electrode, and the counter electrode is a platinum sheet electrode. For the CV test of electrochemical performance, the interval is 0.05 V - 1.2 V (relative to the reversible hydrogen electrode RHE), and the scanning rate is 20 mV / s.

[0039] After the initial performance test is completed, reset the triangular wave cycle parameters and conduct an accelerated aging test at 0.4 V - 1.4 V (relative to the reversible hydrogen electrode RHE). The number of test cycles is 1000 cycles, and the scanning rate is 100 mV / s. After the test results are obtained, conduct the CV test of electrochemical performance again. After the CV performance test of the slurry is completed, calculate the full width at half maximum on the spectrum to test the changes before and after accelerated aging.

[0040] Example 4

[0041] Weigh 1 g of Tanaka TEC10E50E catalyst (50% Pt / C) into a beaker, add 9 g of deionized water, and stir with a glass rod until the catalyst is completely wetted; then successively weigh 10 g of n-propanol and 12 g of perfluorosulfonic acid resin DuPont D0520 with an electronic balance. Ultrasonically pretreat the mixture for 30 minutes, and then transfer it to a high-pressure homogenizer; turn on the circulating cooling water during the operation of the high-pressure homogenizer to maintain the working temperature of the equipment (5 - 10°C), set the high-pressure homogenization pressure to 800 Pa, and the motor frequency to 25 Hz, and perform high-pressure homogenization treatment on the slurry for 20 min.

[0042] Collect the material with a small beaker, and then conduct electrochemical performance tests on it. Among them, the electrolyte is 1 mol / L H2SO4 solution. Bubble with high-purity nitrogen for 30 min before testing to remove oxygen in the electrolyte; use a pipette to transfer 2 μL of the slurry and drop it onto a glassy carbon electrode (with a diameter of 5 mm). After natural drying, transfer it to a disk electrode for testing. Among them, the reference electrode is a calomel electrode, and the counter electrode is a platinum sheet electrode. Conduct CV electrochemical performance tests in the range of 0.05 V - 1.2 V (relative to the reversible hydrogen electrode RHE), and the scanning rate is 20 mV / s.

[0043] After the initial performance test is completed, reset the triangular wave cycle parameters, and conduct an accelerated aging test at 0.4 V - 1.4 V (relative to the reversible hydrogen electrode RHE). The number of test cycles is 1000, and the scanning rate is 100 mV / s. After testing the results, conduct CV electrochemical performance tests on it again. After the CV performance test of the slurry is completed, calculate the full width at half maximum on the graph to test the changes before and after accelerated aging.

[0044] Test Example 1 The test process of the embodiment of the present invention is carried out according to Figure 1 As shown in the flowchart, by changing the homogenization time, pressure, and ionomer content of the high-pressure homogenizer in the embodiment, artificially create the phenomena of uneven ionomer distribution, agglomeration, and catalyst particle breakage caused by over-homogenization; For Examples 1 to 4, the statistical table of the full width at half maximum calculation before and after the accelerated aging test is shown in Table 1.

[0045] Table 1 Statistical table of the full width at half maximum calculation of the examples

[0046] As can be seen from Table 1, for Examples 1 and 2, when the ink formula is the same, with a certain increase in the homogenization time of the high-pressure homogenizer, the ionomer aggregates in the ink are further dispersed and dissociated, and then the CV curve of the ink after the durability test changes significantly ( Figure 2 and Figure 3). For Example 1, due to the short homogenization time, the aggregation of ionomers in the ink is severe, resulting in an increase in the half-peak width of the hydrogen desorption peak in the CV curve and a significant decrease in the carbon double-layer capacitance after the durability test. This is because the aggregation of ionomers in the ink hinders proton conduction, reduces the utilization rate of reaction sites, significantly decreases the double-layer capacitance, and the ionomers block the pores, reducing the effective interface; In Example 2, the homogenization time was increased, and the aggregation of ionomers in the ink was alleviated. After the durability test, the half-peak width decreased, and the double-layer capacitance did not change significantly. The attenuation of the electrochemical area during the accelerated aging process was mainly caused by the migration and aggregation of platinum nanoparticles.

[0047] In Example 3, the homogenization pressure was increased, and the ink was subjected to excessive shear, resulting in the fragmentation of the catalyst carbon support, a decrease in the specific surface area, and insufficient exposure of the catalyst particles. After the carbon support was damaged, the noble metal particles (such as Pt) lost their support and migrated or aggregated. In addition, excessive shear force makes it easier for noble metal particles to peel off from the surface of the carbon support, reducing the number of active sites; After the durability test, the half-peak width of the CV curve of Example 3 decreased ( Figure 4 ), and the amplitude was greater than that of Example 2, indicating that Example 3 had more loss of platinum active sites; In Example 4, the aggregation of ionomers in the ink was simulated by increasing the ionomer content. From Figure 5 the test results, it can be seen that after the durability test, the half-peak width of the CV curve increased significantly, and its value was greater than that of Example 1, and the carbon double-layer capacitance decreased significantly. This example further proves that the electrochemical method can effectively distinguish whether the attenuation of the electrochemically active area (ECSA) in the ink is caused by the aggregation of ionomers or the detachment of platinum (Pt) particles, providing a direction for the optimization of subsequent ink formulations and preparation processes and reducing the development cost.

Claims

1. An evaluation method for the performance of a proton exchange membrane fuel cell ink, characterized in that, It includes the following steps: S1. Prepare the proton exchange membrane fuel cell ink according to the original formula; S2. Add the ink onto the glassy carbon electrode, dry it, and then conduct the initial electrochemical performance test to obtain the CV curve; S3. Carry out an accelerated aging test on the ink by using triangular wave potential cycling. After the test ends, test the electrochemical performance CV curve again; S4. Calculate the full width at half maximum of the hydrogen desorption region of the CV curve before and after the accelerated aging; S5. Distinguish the attenuation type of the electrochemical active area of the ink according to the change value of the full width at half maximum.

2. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 1, wherein In step S1, the ink contains a catalyst, an ionomer, water, and an organic alcohol; The catalyst is a platinum-carbon catalyst with a mass ratio of 50%. The platinum-carbon catalyst is selected from Tanaka TEC10E50E, Umicore Pt0550, or Platinum Source Catalysis AD50; The ionomer is a perfluorosulfonic acid resin, and the perfluorosulfonic acid resin is selected from DuPont D0520, DuPont D2020, Solvay 72, or Solvay 79; The organic alcohol is selected from at least one of isopropyl alcohol, ethanol, ethylene glycol, n-butanol, and n-propanol.

3. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 2, characterized in that, The mass ratio of water∶organic alcohol∶ionomer∶catalyst is 9 - 50∶10 - 50∶8 - 12∶1, and the total solid content of the catalyst and the ionomer in the ink is 1% - 20%.

4. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 1, characterized in that In step S1, the ink dispersion is carried out by using a high-pressure homogenizer. The homogenization pressure is 800 - 1200 Pa, the motor frequency is 10 - 40 Hz, the homogenization time is 5 - 20 min, and the temperature is controlled between 5 - 10 °C.

5. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 1, characterized in that, In step S2, the diameter of the glassy carbon electrode is 5 mm, and the ink sampling amount is 2 - 5 μL; During the electrochemical performance test, it is placed in the electrolyte for testing. The electrolyte is 1 mol / L H2SO4 solution, and nitrogen is bubbled for 30 - 60 min before the test; Relative to the reversible hydrogen electrode RHE, the potential range of the test is 0.05 V - 1.2 V, The scanning rate of the test is 20 mV / s.

6. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 5, wherein The electrochemical performance test adopts a three-electrode system. Among them, the reference electrode is a calomel electrode, and the counter electrode is a platinum sheet electrode.

7. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 1, wherein In step S3, relative to the reversible hydrogen electrode RHE, the potential range of the triangular wave potential cycling is 0.4 V - 1.4 V, The scanning rate of the triangular wave potential cycling is 100 mV / s; During the accelerated aging, the ink is placed in the electrolyte. The electrolyte is 1 mol / L H2SO4 solution, and the number of cycles of the triangular wave potential cycling is 1000 cycles.

8. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 1, wherein The calculation of the full width at half maximum in step S4 includes: Identify the peak current I of the hydrogen desorption peak peak ; Determine the baseline current I baseline ; Calculate the current I at half peak height half : I half = (I peak - I baseline ) / 2 + I baseline ; According to I half Determine the left potential E on the CV curve left and the right potential E right ; Calculate the full width at half maximum E half : E half = |E left - E right |.

9. The evaluation method for the performance of the proton exchange membrane fuel cell ink according to claim 1, characterized in that, In step S5, if the full width at half maximum of the CV curve of the accelerated aging test increases, the attenuation type of the electrochemical active area of the ink is the attenuation type caused by ionomer agglomeration; If the full width at half maximum of the CV curve of the accelerated aging test decreases, the attenuation type of the electrochemical active area of the ink is the attenuation type caused by platinum particle detachment.

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