CN112083041A - Online testing method for resin content of catalyst layer of fuel cell - Google Patents
Online testing method for resin content of catalyst layer of fuel cell Download PDFInfo
- Publication number
- CN112083041A CN112083041A CN202010970485.2A CN202010970485A CN112083041A CN 112083041 A CN112083041 A CN 112083041A CN 202010970485 A CN202010970485 A CN 202010970485A CN 112083041 A CN112083041 A CN 112083041A
- Authority
- CN
- China
- Prior art keywords
- resin content
- fuel cell
- catalyst layer
- water
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Electrochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Fuel Cell (AREA)
- Inert Electrodes (AREA)
Abstract
A method for testing the resin content of a catalytic layer in a fuel cell, comprising (1) preparation of a standard sample: preparing more than three membrane electrodes with the resin content of the catalyst layer set; (2) establishment of a standard curve: measuring a threshold point of a standard sample, calculating the water capacity of the battery through a theoretical formula, and drawing a standard curve by taking the calculated water capacity of the battery as a y coordinate and the resin content of a catalyst layer as an x coordinate; (3) testing of resin content in the catalytic layer: measuring a threshold point of the fuel cell by adopting the same test method as the standard sample, and calculating the water capacity of the cell; (4) calculation of resin content in the catalytic layer: and establishing a calculation formula of the resin content in the cathode or anode catalyst layer according to the standard curve, and substituting the y value of the tested sample into the formula to calculate the resin content in the corresponding cathode or anode catalyst layer. Compared with the prior art, the testing method is simple and reliable, and has no damage to each component of the fuel cell.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a method for representing the content of resin in a catalytic layer of a fuel cell on line.
Background
In recent years, fuel cells have been widely used in the fields of transportation, portable power supplies and the like due to the advantages of environmental friendliness, high energy conversion rate, low-temperature quick start and the like, and have a very broad development prospect. The performance, durability and stability of mass production process of a Membrane Electrode Assembly (MEA) as a core component of a fuel cell are one of the key factors determining whether the fuel cell can be commercially produced and applied in a large scale.
The membrane electrode mainly comprises a proton exchange membrane, a catalyst layer and a gas diffusion layer. The catalytic layer is a key component for determining the performance of the membrane electrode as a place for generating electrochemical reaction. Typically, the catalytic layer is composed of an electrocatalyst and a certain amount of resin solution. In addition to the intrinsic activity and content of the catalyst, the content of resin in the catalytic layer is also a major factor in determining the performance of the membrane electrode. The resin content in the catalytic layer is generally characterized by the mass ratio of resin (Ionomer) to Carbon support (Carbon) in the catalyst, i.e. I/C. Because the resin has the capability of conducting protons, the proton conductivity of the catalytic layer can be improved by adding a certain amount of resin solution into the catalytic layer, so that the membrane electrode performance is improved. However, the resin solution distributed on the surface of the catalyst has a barrier effect on the diffusion of oxygen, and therefore, an excessively high resin content in the catalytic layer increases the mass transfer resistance in the catalytic layer, thereby degrading the performance of the membrane electrode. In summary, the resin content in the catalyst layer is a key factor in determining the performance of the membrane electrode.
However, since the content of the resin in the catalyst layer is generally low and the resin itself has an organic polymer structure, it is difficult to measure the content thereof by a conventional method such as a differential weight method or an elemental analysis method. At present, no quick and accurate online testing method for the resin content in the catalytic layer of the fuel cell exists. Therefore, it is necessary to introduce new techniques and research means.
Disclosure of Invention
The invention provides an on-line testing method for the resin content of a catalyst layer of a fuel cell, aiming at the defects of the existing catalyst layer resin content testing technology in the fuel cell technology. The method has the advantages of no damage, rapidness, accuracy and the like, and the aim of detecting the resin content of the catalyst layer on line can be fulfilled by adopting the method.
The technical scheme of the invention is as follows:
a method for on-line testing of resin content of a catalytic layer of a fuel cell, the method comprising the steps of:
1) preparing a cathode or anode catalyst layer resin content standard sample:
selecting a proton exchange membrane, a catalyst, a resin solution and a gas diffusion layer which are the same as the membrane electrode to be tested, and preparing more than three membrane electrodes with the set catalyst layer resin content, wherein the other materials and parameters of the prepared membrane electrodes except the catalyst layer resin content are the same as those of the membrane electrode to be tested;
2) establishment of a standard curve:
measuring a threshold point of the standard sample, calculating the water capacity of the battery through a theoretical formula, and drawing a standard curve by taking the calculated water capacity of the battery as a y coordinate and the resin content of the catalyst layer as an x coordinate;
3) testing of resin content in the catalytic layer:
measuring a threshold point of the fuel cell by adopting the same test method as the standard sample, and calculating the water capacity of the cell;
4) calculation of resin content in the catalytic layer:
and establishing a calculation formula of the resin content in the cathode or anode catalyst layer according to the standard curve: y is ax + b;
wherein a is the slope of the standard curve, b is the intercept of the standard curve, x is the resin content in the catalyst layer, and y is the water capacity of the battery;
substituting the y value of the sample tested in the step 3) into a formula to calculate the resin content in the cathode or anode catalyst layer of the membrane electrode to be tested.
Based on the above scheme, preferably, in the step 2), the standard sample threshold point is tested in the following manner: assembling the prepared standard sample into a single cell of the fuel cell, placing the single cell on a cell evaluation platform, measuring a transient current-voltage curve of the cell under the conditions of given temperature, pressure and dry gas inlet flow, and determining a threshold point of the fuel cell according to the curve.
Based on the above scheme, preferably, in the step 2), the specific determination method of the standard sample threshold point (see CN100413134C) is: placing the assembled fuel cell on a cell evaluation platform, setting the conditions of temperature, pressure and dry gas inlet flow, performing linear variable load scanning on the fuel cell, starting from an activation polarization area, moving to a diffusion polarization area, and immediately returning when the conditions reach a set value; the present invention exemplifies a process of determining a threshold point from a transient current-voltage curve under a certain condition, as shown in fig. 1.
Based on the above scheme, preferably, in step 2), the calculation formula of the water capacity of the fuel cell is as follows:
wherein the content of the first and second substances,
generated by electrochemical reactions in the electrodesThe mass of the water is such that,
quality of water brought out for the tail gas, QtotalF is the Faraday constant (96485C mol) for the total amount of electricity discharged from the cell-1) I is the battery current, t1For the time of occurrence of the threshold point on the preceding scanning line, t2The time at which the threshold point occurs on the return scan line,
the amount of material that is the water carried over by the tail gas,
molar mass of water (18g mol)-1) P is the partial pressure (Pa) of water vapor, and V is the volume (m) of water vapor3) R is a gas constant (8.314Pa m)3 mol-1K-1) T is the inlet temperature of the reaction gas, PtotalIs gas inlet pressure, and Δ RH is reaction gas inlet-outlet humidity difference, PsatTo saturated vapor pressure, VoutIs the volume of tail gas, f is the flow rate of the reaction gas,
the amount of water contained in the battery.
Based on the above scheme, preferably, in the resin solution, the resin is one or more of perfluorosulfonic acid resin and non-fluorosulfonic acid resin, and the solvent is water, alcohol or a water-alcohol mixture.
Based on the above scheme, preferably, in the step 1), the preparation method of the membrane electrode comprises: and preparing the catalytic layer on the proton exchange membrane or the gas diffusion layer by adopting a brush coating method, a blade coating method, a transfer printing method, a spraying method, a screen printing method or an ink-jet printing method.
Based on the above scheme, the method is preferably based on the fact that the resin content of the catalytic layer is inversely proportional to the water capacity of the battery, and therefore formula conversion is needed to obtain the resin content in the catalytic layer of the cathode or the anode.
Compared with the prior art, the invention has the advantages that:
1. the testing method is high in feasibility, simple and reliable;
2. the testing process is on-line detection, and the components of the membrane electrode of the fuel cell are not damaged;
3. the detection is quick, and the membrane electrode with the same catalyst, proton exchange membrane and gas diffusion layer can be substituted into a standard equation to quickly determine the detection result.
Drawings
FIG. 1 shows the Pt loading of the cathode/anode at 0.4/0.2mg cm-2The fuel cell is at 40 deg.C, 101kPa, and the intake of hydrogen/air is 40/200ml min-1A transient current-voltage curve under the conditions and a threshold point.
FIG. 2 shows the Pt loading of 0.2mg cm obtained in example 1-2Resin content standard curve of catalytic layer.
FIG. 3 shows the Pt loading of 0.1mg cm obtained in example 4-2Resin content standard curve of catalytic layer.
FIG. 4 is a plot of the data points for the test samples obtained in examples 1-3 at a Pt loading of 0.2mg cm-2The corresponding position in the standard curve of the resin content of the catalytic layer.
FIG. 5 is a plot of the data points for the test samples obtained in examples 4-6 at a Pt loading of 0.1mg cm-2The corresponding position in the standard curve of the resin content of the catalytic layer.
Fig. 6 is a current density (i) -time (t) curve corresponding to the calculation process of the water capacity of the fuel cell in example 1.
Detailed Description
Example 1
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.2mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.3,0.5,0.7,0.9, effective area is 5cm-2The four membrane electrodes are respectively assembled into single fuel cell cells, the single fuel cell cells are placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Under the conditions ofDetermining the threshold point of the fuel cell according to the transient current-voltage curve of the cell, wherein the threshold point is (current density, mA cm)-2Voltage, V): 497/0.567, 331/0.642, 285/0.384, 81/0.418;
calculating the water capacity of the fuel cell according to the formulas 1 to 5, wherein the water capacity is (mg): 38.98, 25.74, 11.96 and 3.69, taking one of them as an example, the calculation process of the water capacity of the fuel cell is as follows:
and drawing a standard curve by taking the water capacity of the fuel cell as a y coordinate and the resin content of the cathode catalyst layer as an x coordinate. The calculation formula is fitted by a standard curve as follows: y-59.82 x + 55.99.
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.2mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.4, and effective area is 5cm-2The membrane electrode is assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2V)/voltage, V)392/0.608, the fuel cell capacity was calculated according to equations 1-5. Bringing the water capacity into the condition that y is-59.82 x + 55.99; the resin content in the cathode catalyst layer was found to be 0.42 in terms of I/C, which was 5% error from the actual content.
Example 2
70% Pt/C (Vulcan XC) was used as catalyst, 5% NaThe fion solution is a resin solution, and the anode/cathode Pt loading capacity sprayed on the NR-211 membrane by adopting a spraying method is as follows: 0.2/0.2mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.3,0.5,0.7,0.9, effective area is 5cm-2The four membrane electrodes are respectively assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point of the fuel cell according to the transient current-voltage curve of the cell under the condition, wherein the threshold point is (current density, mA cm)-2Voltage, V): 497/0.567, 331/0.642, 285/0.384, 81/0.418; calculating the water capacity of the fuel cell according to the formulas 1 to 5, wherein the water capacity is (mg): 38.98, 25.74, 11.96 and 3.69, which are used as y coordinates, and the resin content of the cathode catalyst layer is used as x coordinates, and a standard curve is drawn.
The calculation formula is fitted by a standard curve as follows: y-59.82 x + 55.99.
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.2mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.6, and effective area is 5cm-2The membrane electrode is assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2V)/voltage, V)299/0.478, and the fuel cell capacity is calculated according to equations 1-5. Bringing the water capacity into the condition that y is-59.82 x + 55.99; the resin content in the cathode catalyst layer was found to be 0.58, which was found to have an error of 3.33% from the actual content.
Example 3
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.2mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.3,0.5,0.7,0.9, effective area is 5cm-2The four membranes are electrically connectedRespectively assembling the electrodes into a single fuel cell, placing the single fuel cell on a cell evaluation table, measuring 40 ℃,101kPa and 40ml min of dry gas inlet flow of hydrogen-1Air 200ml min-1Determining the threshold point of the fuel cell according to the transient current-voltage curve of the cell under the condition, wherein the threshold point is (current density, mA cm)-2Voltage, V): 497/0.567, 331/0.642, 285/0.384, 81/0.418; calculating the water capacity of the fuel cell according to the formulas 1 to 5, wherein the water capacity is (mg): 38.98, 25.74, 11.96 and 3.69, which are used as y coordinates, and the resin content of the cathode catalyst layer is used as x coordinates, and a standard curve is drawn.
The calculation formula is fitted by a standard curve as follows: y-59.82 x + 55.99.
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.2mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.8, and effective area is 5cm-2The membrane electrode is assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2Voltage, V)146/0.402, the fuel cell capacity is calculated according to equations 1-5. Bringing the water capacity into the condition that y is-59.82 x + 55.99; the resin content in the cathode catalyst layer was 0.83, which was found to be 3.75% error from the actual content.
Example 4
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.1mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.3,0.5,0.7,0.9, effective area is 5cm-2The four membrane electrodes are respectively assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point of the fuel cell according to the transient current-voltage curve of the cell under the condition of (current density)Degree, mA cm-2Voltage, V): 472/0.414, 416/0.477, 225/0.422 and 117/0.489, the water capacity of the fuel cell is calculated according to the formulas 1 to 5, and is taken as a y coordinate, and the resin content of the cathode catalyst layer is taken as an x coordinate, so that a standard curve is drawn.
The calculation formula is fitted by a standard curve as follows: y-33.62 x + 31.06.
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.1mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.4, and effective area is 5cm-2The membrane electrode is assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2V)/voltage, V)438/0.453, the fuel cell capacity was calculated according to equation 1-5. Bringing the water capacity into the condition that y is-33.62 x + 31.06; the resin content in the cathode catalyst layer was found to be 0.39 in terms of I/C, which was found to be 2.5% error from the actual content.
Example 5
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.1mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.3,0.5,0.7,0.9, effective area is 5cm-2The four membrane electrodes are respectively assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2Voltage, V): 472/0.414, 416/0.477, 225/0.422 and 117/0.489, the water capacity of the fuel cell is calculated according to the formulas 1 to 5, and is taken as a y coordinate, and the resin content of the cathode catalyst layer is taken as an x coordinate, so that a standard curve is drawn.
The calculation formula is fitted by a standard curve as follows: y-33.62 x + 31.06.
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.1mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.6, and effective area is 5cm-2The membrane electrode is assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2V)/voltage, V)334/0.436, the fuel cell capacity is calculated according to the equations 1-5. Bringing the water capacity into the condition that y is-33.62 x + 31.06; the resin content in the cathode catalyst layer was 0.63, which was 5% error from the actual content.
Example 6
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.1mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.3,0.5,0.7,0.9, effective area is 5cm-2The four membrane electrodes are respectively assembled into a single fuel cell and placed on a cell evaluation table, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2Voltage, V): 472/0.414, 416/0.477, 225/0.422 and 117/0.489, the water capacity of the fuel cell is calculated according to the formulas 1 to 5, and is taken as a y coordinate, and the resin content of the cathode catalyst layer is taken as an x coordinate, so that a standard curve is drawn.
The calculation formula is fitted by a standard curve as follows: y-33.62 x + 31.06.
Anode/cathode Pt loading was sprayed on NR-211 membrane by spray coating using 70% Pt/c (vulcan xc) as catalyst, 5% Nafion solution as resin solution: 0.2/0.1mg cm-2The resin content of the catalyst layer is as follows: anode I/C is 0.7, cathode I/C is 0.8, and effective area is 5cm-2Membrane electrode of (1) assembled as fuelThe single battery cell is arranged on a battery evaluation bench, the temperature of 40 ℃ is measured, the pressure of 101kPa is measured, and the dry gas inlet flow is 40ml min of hydrogen-1Air 200ml min-1Determining the threshold point (current density, mA cm) of the fuel cell based on the transient current-voltage curve of the cell under the condition-2Voltage, V)154/0.462, the fuel cell capacity was calculated according to equations 1-5. Bringing the water capacity into the condition that y is-33.62 x + 31.06; the resin content in the cathode catalyst layer was 0.77% I/C, which was found to be 3.75% error from the actual content.
Claims (7)
1. An on-line testing method for resin content of a catalyst layer of a fuel cell is characterized in that: the method comprises the following steps:
1) preparation of standard sample:
selecting a proton exchange membrane, a catalyst, a resin solution and a gas diffusion layer which are the same as the membrane electrode to be tested, and preparing more than three membrane electrodes with the set catalyst layer resin content, wherein the other materials and parameters of the prepared membrane electrodes except the catalyst layer resin content are the same as those of the membrane electrode to be tested;
2) establishment of a standard curve:
measuring a threshold point of the standard sample, calculating the water capacity of the battery through a theoretical formula, and drawing a standard curve by taking the calculated water capacity of the battery as a y coordinate and the resin content of the catalyst layer as an x coordinate;
3) testing of resin content in the catalytic layer:
measuring a threshold point of the fuel cell by adopting the same test method as the standard sample, and calculating the water capacity of the cell;
4) calculation of resin content in the catalytic layer:
and establishing a calculation formula of the resin content in the cathode or anode catalyst layer according to the standard curve: y is ax + b;
wherein a is the slope of the standard curve, b is the intercept of the standard curve, x is the resin content in the catalyst layer, and y is the water capacity of the battery;
substituting the y value of the sample tested in the step 3) into a formula to calculate the resin content in the cathode or anode catalyst layer of the membrane electrode to be tested.
2. The test method according to claim 1, wherein in the step 2),
the standard sample threshold points were tested as follows: assembling the prepared standard sample into a single cell of the fuel cell, placing the single cell on a cell evaluation platform, measuring a transient current-voltage curve of the cell under the conditions of given temperature, pressure and dry gas inlet flow, and determining a threshold point of the fuel cell according to the curve.
3. The test method of claim 2, wherein: in the step 2), a specific determination method of the standard sample threshold point comprises the following steps: placing the assembled fuel cell on a cell evaluation platform, setting the conditions of temperature, pressure and dry gas inlet flow, performing linear variable load scanning on the fuel cell, starting from an activation polarization area, moving to a diffusion polarization area, and immediately returning when the conditions reach a set value; and dynamic data acquisition is carried out on the current and the voltage in the scanning process until the scanning is stopped, the data acquired by scanning is drawn into a transient current-voltage curve, and the intersection point of a forward scanning line and a return scanning line of the drawn curve is the threshold point determined by the battery.
4. The testing method according to claim 1, wherein in the step 2), the fuel cell water capacity calculation formula is as follows:
wherein the content of the first and second substances,
the mass of water produced by the electrochemical reaction within the electrode,
quality of water brought out for the tail gas, QtotalF is the Faraday constant 96485C mol for the total amount of electricity discharged from the battery-1I is the battery current, t1For the time of occurrence of the threshold point on the preceding scanning line, t2The time at which the threshold point occurs on the return scan line,
the amount of material that is the water carried over by the tail gas,
is a molar mass of water of 18g mol-1P is the partial pressure Pa of the water vapor, V is the volume m of the water vapor3R is a gas constant of 8.314Pa m3 mol-1 K-1T is the inlet temperature of the reaction gas, PtotalIs gas inlet pressure, and Δ RH is reaction gas inlet-outlet humidity difference, PsatTo saturated vapor pressure, VoutIs the volume of tail gas, f is the flow rate of the reaction gas,
the amount of water contained in the battery.
5. The test method of claim 1, wherein: in the resin solution, the resin is one or more than two of perfluorinated sulfonic acid resin and non-fluorinated sulfonic acid resin, and the solvent is water, alcohol or a water-alcohol mixture.
6. The test method of claim 1, wherein: in the step 1), the preparation method of the membrane electrode comprises the following steps: and preparing the catalytic layer on the proton exchange membrane or the gas diffusion layer by adopting a brush coating method, a blade coating method, a transfer printing method, a spraying method, a screen printing method or an ink-jet printing method.
7. The test method of claim 1, wherein: the catalytic layer resin content is inversely proportional to the water capacity of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010970485.2A CN112083041B (en) | 2020-09-15 | 2020-09-15 | Online testing method for resin content of catalyst layer of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010970485.2A CN112083041B (en) | 2020-09-15 | 2020-09-15 | Online testing method for resin content of catalyst layer of fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112083041A true CN112083041A (en) | 2020-12-15 |
| CN112083041B CN112083041B (en) | 2021-06-01 |
Family
ID=73736401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010970485.2A Active CN112083041B (en) | 2020-09-15 | 2020-09-15 | Online testing method for resin content of catalyst layer of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112083041B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684278A (en) * | 2022-10-28 | 2023-02-03 | 天津市贰拾壹站检测技术有限公司 | Method for measuring polymer content in polymer mortar hardened body |
| CN117517416A (en) * | 2024-01-05 | 2024-02-06 | 未势能源科技有限公司 | Accelerated endurance test method, device, equipment and storage medium for electrolyte resin |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380712A (en) * | 2001-04-10 | 2002-11-20 | 大连新源动力股份有限公司 | Anti-CO compound catalystic layer for proteon-exchange membrane fuel cell and its preparation |
| JP2005241506A (en) * | 2004-02-27 | 2005-09-08 | Toshiba Corp | Microelectrode for electrochemical measurement and manufacturing method thereof |
| CN101000967A (en) * | 2007-01-11 | 2007-07-18 | 上海交通大学 | Membrane electrode of protone exchange membrane fuel cell and preparation method thereof |
| CN101034748A (en) * | 2007-03-29 | 2007-09-12 | 武汉理工大学 | Making method for core component of water-reservation proton exchange film fuel battery |
| CN101626083A (en) * | 2009-07-31 | 2010-01-13 | 重庆大学 | Method for preparing proton exchange membrane fuel cell electrode with high catalyst utilization ratio |
| CN103884729A (en) * | 2012-12-21 | 2014-06-25 | 中国科学院大连化学物理研究所 | Test method of fuel cell catalytic layer metal loads |
| CN106501130A (en) * | 2016-10-18 | 2017-03-15 | 西安理工大学 | A kind of organic coating device for testing diffusion coefficient and the method for testing based on the device |
| CN108318557A (en) * | 2017-12-28 | 2018-07-24 | 复旦大学 | Electrochemical Detection graphene-phenolic resin composite electrode and preparation method thereof |
| CN109541007A (en) * | 2018-11-23 | 2019-03-29 | 新源动力股份有限公司 | A method of test fuel cell catalyst layer vertical direction resistance |
| CN109841879A (en) * | 2019-01-16 | 2019-06-04 | 清华大学 | Fuel cell water content estimating system, method, computer equipment and storage medium |
| CN110318067A (en) * | 2019-07-09 | 2019-10-11 | 清华大学 | Electro catalytic electrode, preparation and the recovery method of recoverable |
| CN111103545A (en) * | 2019-12-27 | 2020-05-05 | 浙江锋源氢能科技有限公司 | Fuel cell membrane electrode performance testing method |
-
2020
- 2020-09-15 CN CN202010970485.2A patent/CN112083041B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380712A (en) * | 2001-04-10 | 2002-11-20 | 大连新源动力股份有限公司 | Anti-CO compound catalystic layer for proteon-exchange membrane fuel cell and its preparation |
| CN1181583C (en) * | 2001-04-10 | 2004-12-22 | 大连新源动力股份有限公司 | Anti-CO compound catalystic layer for proteon-exchange membrane fuel cell and its preparation |
| JP2005241506A (en) * | 2004-02-27 | 2005-09-08 | Toshiba Corp | Microelectrode for electrochemical measurement and manufacturing method thereof |
| CN101000967A (en) * | 2007-01-11 | 2007-07-18 | 上海交通大学 | Membrane electrode of protone exchange membrane fuel cell and preparation method thereof |
| CN101034748A (en) * | 2007-03-29 | 2007-09-12 | 武汉理工大学 | Making method for core component of water-reservation proton exchange film fuel battery |
| CN101626083A (en) * | 2009-07-31 | 2010-01-13 | 重庆大学 | Method for preparing proton exchange membrane fuel cell electrode with high catalyst utilization ratio |
| CN103884729A (en) * | 2012-12-21 | 2014-06-25 | 中国科学院大连化学物理研究所 | Test method of fuel cell catalytic layer metal loads |
| CN106501130A (en) * | 2016-10-18 | 2017-03-15 | 西安理工大学 | A kind of organic coating device for testing diffusion coefficient and the method for testing based on the device |
| CN108318557A (en) * | 2017-12-28 | 2018-07-24 | 复旦大学 | Electrochemical Detection graphene-phenolic resin composite electrode and preparation method thereof |
| CN109541007A (en) * | 2018-11-23 | 2019-03-29 | 新源动力股份有限公司 | A method of test fuel cell catalyst layer vertical direction resistance |
| CN109841879A (en) * | 2019-01-16 | 2019-06-04 | 清华大学 | Fuel cell water content estimating system, method, computer equipment and storage medium |
| CN109841879B (en) * | 2019-01-16 | 2020-01-24 | 清华大学 | Fuel cell water content estimation system, method, computer device and storage medium |
| CN110318067A (en) * | 2019-07-09 | 2019-10-11 | 清华大学 | Electro catalytic electrode, preparation and the recovery method of recoverable |
| CN111103545A (en) * | 2019-12-27 | 2020-05-05 | 浙江锋源氢能科技有限公司 | Fuel cell membrane electrode performance testing method |
Non-Patent Citations (1)
| Title |
|---|
| 迟军: "催化层树脂含量对APEWE性能的影响", 《电源技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684278A (en) * | 2022-10-28 | 2023-02-03 | 天津市贰拾壹站检测技术有限公司 | Method for measuring polymer content in polymer mortar hardened body |
| CN115684278B (en) * | 2022-10-28 | 2023-09-12 | 天津市贰拾壹站检测技术有限公司 | Method for measuring polymer content in polymer mortar hardened body |
| CN117517416A (en) * | 2024-01-05 | 2024-02-06 | 未势能源科技有限公司 | Accelerated endurance test method, device, equipment and storage medium for electrolyte resin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112083041B (en) | 2021-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Oh et al. | Electrochemical carbon corrosion in high temperature proton exchange membrane fuel cells | |
| Jeong et al. | Fuel crossover in direct formic acid fuel cells | |
| Jeon et al. | Effect of ionomer content and relative humidity on polymer electrolyte membrane fuel cell (PEMFC) performance of membrane-electrode assemblies (MEAs) prepared by decal transfer method | |
| Song et al. | Effect of Electrode Degradation on the Membrane Degradation in PEMFC | |
| Shim et al. | Characteristics of the Nafion ionomer-impregnated composite membrane for polymer electrolyte fuel cells | |
| CN112083041B (en) | Online testing method for resin content of catalyst layer of fuel cell | |
| Kwon et al. | Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells | |
| CN101566594A (en) | Method for testing defects of single membrane electrode assembly in fuel cell stack | |
| Ren et al. | Methanol cross-over in direct methanol fuel cells | |
| O'Rian et al. | Application of the transmission line EIS model to fuel cell catalyst layer durability | |
| Jing et al. | Influencing factors on the stability of direct methanol fuel cells | |
| Mack et al. | Electrochemical impedance spectroscopy as a diagnostic tool for high-temperature PEM fuel cells | |
| Ren et al. | Rapid synchronous state-of-health diagnosis of membrane electrode assemblies in fuel cell stacks | |
| Johnston et al. | Impact of solvent on ionomer structure and fuel cell durability | |
| Petrovick et al. | Mass-Transport Resistances of Acid and Alkaline Ionomer Layers: A Microelectrode Study Part 1-Microelectrode Development | |
| Navarra et al. | Temperature‐dependent Performances of a Fuel Cell Using a Superacid Zirconia‐doped Nafion Polymer Electrolyte | |
| Thanganathan et al. | Development of non-perfluorinated hybrid materials for single-cell proton exchange membrane fuel cells | |
| Sugawara et al. | Electrocatalytic activity analysis of PEFC cathode by 1-D macrohomogeneous model of catalyst layer | |
| CN115616202A (en) | On-line testing method for optimal resin content of catalyst layer of fuel cell | |
| Cho et al. | Enhancement of polymer electrolyte membrane fuel cell performance by boiling a membrane electrode assembly in sulfuric acid solution | |
| Aragane et al. | Evaluation of an effective platinum metal surface area in a phosphoric acid fuel cell | |
| Wesselmark et al. | Degradation studies of PEMFC cathodes based on different types of carbon | |
| KR101103707B1 (en) | Method and apparatus for measuring electrochemical property of electrode of fuel cell | |
| Jayarathne et al. | Characterization of Gas Diffusion Layers for Electrochemical Reduction of CO 2 | |
| Mashio et al. | Advanced In-situ Analysis of Reactant Gas Partial Pressure at Catalyst Layer/PEM Interfaces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |