CN214753861U - Proton exchange membrane electrode with temperature monitoring function and fuel cell - Google Patents
Proton exchange membrane electrode with temperature monitoring function and fuel cell Download PDFInfo
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- CN214753861U CN214753861U CN202023308453.0U CN202023308453U CN214753861U CN 214753861 U CN214753861 U CN 214753861U CN 202023308453 U CN202023308453 U CN 202023308453U CN 214753861 U CN214753861 U CN 214753861U
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- exchange membrane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model relates to a proton exchange membrane electrode, fuel cell with temperature monitoring, proton exchange membrane electrode includes proton exchange membrane body (1), proton exchange membrane body (1) go up to plate and be equipped with at least one platinum resistance (3) that are used for temperature monitoring, be located proton exchange membrane body (1) on platinum resistance (3) top set up the insulating layer, be located proton exchange membrane body (1) on lie in the insulating layer upper strata and set up the catalyst layer. The fuel cell comprises a membrane electrode and a bipolar plate, wherein the membrane electrode adopts the proton exchange membrane electrode with temperature monitoring. Compared with the prior art, the utility model discloses carry out temperature monitoring with the platinum resistance integration in membrane electrode, the platinum resistance size is little can not exert an influence to the battery, and dynamic response performance is good simultaneously.
Description
Technical Field
The utility model relates to a proton exchange membrane fuel cell and accessory technical field thereof especially relate to a proton exchange membrane electrode, fuel cell with temperature monitoring.
Background
During the operation of Proton Exchange Membrane Fuel Cell (PEMFC), the internal temperature thereof needs to be monitored on-line in real time to control it to operate in an optimal working state. However, during rapid loading and unloading, the internal temperature changes very rapidly, so that a temperature probe for measuring temperature needs to have good dynamic performance. In addition, since the highest temperature point inside the cell is located at the catalytic layer, the space is extremely small (the thickness of the catalytic layer is only in the order of a few micrometers to a dozen micrometers), and if a temperature probe with an excessively large volume is placed at the catalytic layer, the temperature probe, the catalytic layer and other cell components are pressed under the clamping force of the cell, so that the structure of the cell is seriously damaged.
In the sensors for measuring the temperature of the cathode catalyst layer, film thermocouples which are processed autonomously are mostly used, but in the current documents, the thickness of the used thermocouple is usually tens of micrometers or even hundreds of micrometers, and the film thermocouple with smaller size can be several micrometers, but the thickness of the film thermocouple with the smaller size is larger than that of the catalyst layer, so that an external temperature probe is inserted into the catalyst layer, the external temperature probe can seriously interfere with the structure of the battery junction, on one hand, the damage of the battery structure can be caused, on the other hand, the actual temperature of a measurement place can be influenced, and the dynamic performance of the sensor with the overlarge size cannot guarantee that rapid temperature change can be captured.
SUMMERY OF THE UTILITY MODEL
The present invention aims to overcome the above-mentioned drawbacks of the prior art and to provide a proton exchange membrane electrode and a fuel cell with temperature monitoring.
The purpose of the utility model can be realized through the following technical scheme:
the proton exchange membrane electrode comprises a proton exchange membrane body, at least one platinum thermal resistor for temperature monitoring is plated on the proton exchange membrane body, an insulating layer is arranged above the platinum thermal resistor on the proton exchange membrane body, and a catalyst layer is arranged on the proton exchange membrane body and on the insulating layer.
Preferably, the platinum thermistor is distributed in a plurality.
Preferably, the platinum thermal resistor comprises a temperature-sensitive area and pins, the temperature-sensitive area is arranged in a battery working area on the proton exchange membrane body, and the temperature-sensitive area is led out to the boundary of the proton exchange membrane body through the two pins.
Preferably, the temperature sensing area is a platinum resistance wire which is in a snakelike distributed continuous structure, and the head end and the tail end of the platinum resistance wire are respectively led out through a pin.
Preferably, the pins comprise a lead and a connecting block, the lead is located in a cell working area on the proton exchange membrane body and connected with the end part of the platinum resistance wire, and the connecting block is located in a non-cell working area on the proton exchange membrane body and leads the lead out to the boundary of the proton exchange membrane body.
Preferably, the area of each platinum thermistor located in the cell operating region accounts for 0.5% to 0.8% of the area of the cell operating region.
Preferably, the line width of the platinum resistance wire in the temperature sensing area is 5-100 μm.
Preferably, the proton exchange membrane body comprises a Nafion membrane.
Preferably, the insulating layer comprises a Nafion insulating layer.
A proton exchange membrane fuel cell with temperature monitoring comprises a membrane electrode and a bipolar plate, wherein the membrane electrode adopts the proton exchange membrane electrode with temperature monitoring.
Compared with the prior art, the utility model has the advantages of as follows:
(1) the utility model integrates the platinum thermal resistor in the membrane electrode, carries out temperature monitoring through the platinum thermal resistor, and can make the size of the temperature probe (platinum thermal resistor) extremely small due to the adoption of the method of directly coating the membrane, the thickness can reach hundreds of nanometers, and the minimum line width reaches the micron level, so the size of the temperature probe basically can not influence the battery;
(2) the area of the platinum thermal resistor in the working area of the battery is very small, the thermal inertia of the temperature probe is small, the dynamic response is very fast, and the dynamic response performance of temperature measurement is improved;
(3) the connecting block area with larger area in the pins of the platinum thermal resistor is arranged outside the battery working area, so that the influence on the battery can be reduced, and an external circuit can be conveniently connected;
(4) the utility model discloses set up the Nafion insulating layer, when not influencing the battery performance, provide platinum resistance's effective insulation.
Drawings
FIG. 1 is a schematic diagram of an arrangement of a platinum thermal resistor on a proton exchange membrane electrode with temperature monitoring according to the present invention;
fig. 2 is a schematic structural diagram of the platinum thermistor of the present invention.
In the figure, 1 is a proton exchange membrane body, 2 is a cell working area, 3 is a platinum thermal resistor, 31 is a temperature sensing area, 32 is a lead wire, and 33 is a connecting block.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1, the present embodiment provides a proton exchange membrane electrode with temperature monitoring, the proton exchange membrane electrode includes a proton exchange membrane body 1, at least one platinum thermistor 3 for temperature monitoring is plated on the proton exchange membrane body 1, an insulating layer is disposed above the platinum thermistor 3 on the proton exchange membrane body 1, and a catalyst layer is disposed on the proton exchange membrane body 1 on the insulating layer, in the present embodiment, the proton exchange membrane body 1 includes a Nafion membrane, the insulating layer includes a Nafion insulating layer, and the catalyst layer is a catalyst slurry prepared from commercial Pt/C.
As shown in fig. 2, the platinum thermistor 3 includes a temperature-sensitive region 31 and pins, the temperature-sensitive region 31 is disposed in the cell working region 2 on the proton exchange membrane body 1, and the temperature-sensitive region 31 is led out to the boundary of the proton exchange membrane body 1 through two pins.
The temperature-sensing area 31 is a platinum resistance wire with a snakelike distributed continuous structure, and the head end and the tail end of the platinum resistance wire are respectively led out through a pin. The pins comprise a lead 32 and a connecting block 33, the lead 32 is positioned in the cell working area 2 on the proton exchange membrane body 1 and is connected with the end part of the platinum resistance wire, the connecting block 33 is positioned in the non-cell working area on the proton exchange membrane body 1 and leads the lead 32 out to the boundary of the proton exchange membrane body 1, wherein the lead 32 is positioned in the cell working area 2, thereby reducing the area of the whole platinum thermal resistor 3 positioned in the cell working area 2, improving the dynamic response performance without influencing the cell performance, the connecting block 33 is positioned in the non-cell working area and is convenient to be connected with an external temperature measuring circuit,
the line width of the platinum resistance wire of the temperature sensing area 31 is 5-100 mu m, and the area of each platinum thermal resistor 3 in the battery working area 2 accounts for 0.5-0.8% of the area of the battery working area 2.
The manufacturing method of the proton exchange membrane electrode with the temperature monitoring function comprises the following steps:
1) sputtering on a Nafion film by a magnetron sputtering method to manufacture a platinum thermal resistor 3;
2) a layer of Nafion solution is sprayed on the platinum thermal resistor 3 again, and a Nafion insulating layer is formed after solidification, so that the platinum thermal resistor 3 is prevented from being in direct contact with the catalyst layer to form a short circuit;
3) after the platinum thermal resistor 3 is manufactured, calibrating the thermal resistor;
4) after the platinum thermal resistor 3 is determined to work normally, the Nafion membrane is sprayed with catalyst and assembled with single cell according to the operation flow of the single cell of the fuel cell. The temperature of the PEMFC during normal operation can then be monitored.
In the step 1), the Nafion membrane should be a type with small water absorption, swelling and deformation, such as a proton exchange membrane produced by GORE company (GORE) in the united states, and the specific processing flow is shown in fig. 1, and the details are as follows:
firstly, cleaning and drying the Nafion membrane, taking out the Nafion membrane after completely cleaning and drying, and standing at normal temperature for later use.
Secondly, processing the metal mask according to a temperature probe design drawing, wherein the design drawing is shown in figure 2.
Thirdly, placing the metal mask on a Nafion film, determining the position, then carrying out magnetron sputtering, wherein the target is a high-purity platinum target, and the substrate is controlled to be maintained at the normal temperature of 20-30 ℃ in the sputtering process.
Step 2) because Nafion has electronic insulation, so spray coating a layer of thin Nafion in order to act as the insulating layer of the platinum resistance heater 3, this insulating layer can play an insulating role on the one hand, because thickness is very thin at the same time, and similar to structural property of original Nafion membrane, therefore will not cause very big influence to the performance of the battery. The specific details are as follows:
preparing Nafion solution slurry: the proportioning of the slurry is mainly determined by the thickness of the Nafion film to be sprayed and the Nafion density, so that the required Nafion quality is determined. Isopropanol was used as the solvent.
Spraying Nafion solution: the spraying platform is heated to 80 ℃, and meanwhile, a negative pressure is needed to be arranged on the platform, so that the base film to be sprayed can be adsorbed, and the base film is kept in a flat state all the time in the spraying process. The pressure and the aperture of the spray head need to meet the requirement that the sprayed fog drops are small enough to be quickly solidified on the base film and can not form flowable large-cluster liquid drops on the base film. Before spraying, the prepared Nafion slurry is subjected to ultrasonic oscillation to be fully and uniformly distributed.
And 3) calibrating the platinum resistor, firstly, constructing a complete temperature measuring system which comprises a prepared temperature probe, an excitation circuit, a signal conditioning circuit, a signal acquisition card and an upper computer. The exciting circuit provides an exciting current for the temperature probe, the resistor is converted into a voltage signal, then the signal conditioning circuit carries out filtering, amplification and other processing on the voltage signal, then the acquisition card acquires data, and finally the voltage data is converted into the resistor on the upper computer.
After the temperature measurement system is built, the system can be calibrated. Calibration also requires a thermostatic device to achieve a varying temperature, which is controlled very stable with little fluctuation over time. Secondly, a high-precision thermometer is needed as a reference temperature. The formal calibration process is as follows:
a series of equally spaced temperature points are set by a thermostat, and at each temperature point, after the temperature has stabilized, resistance data of the temperature probe and the temperature displayed by the reference thermometer are recorded. Repeating the steps from low temperature to high temperature and from high temperature to low temperature for multiple times (generally 3-10 times), and drawing a resistance-temperature curve.
And 4) after the calibration work of the platinum resistance temperature probe is finished, the subsequent fuel cell preparation work can be carried out. A catalyst slurry prepared from commercial Pt/C was sprayed on the Nafion membrane (on which a platinum resistance temperature probe had been fabricated), followed by membrane electrode encapsulation. Finally, the single cell test and the actual temperature measurement are carried out.
In this example, the size of the Nafion membrane was 7.5cm by 7.5cm, the middle activation region was 5cm by 5cm, and the total area of the 4 platinum thermistors 3 located in the cell working region 2 was 66.45mm2The area of the battery working area 2 is 2.66%, and the line width of the platinum resistance wire of the temperature sensing area 31 is designed to be 100 mu m.
The utility model discloses a temperature measurement method that can real-time supervision PEMFC operating temperature under the prerequisite of minimize to battery structure, performance influence. The size of the temperature probe can be extremely small by adopting a method of directly coating a film on the film, the thickness can reach hundreds of nanometers, and the minimum line width reaches hundreds of micrometers, so that the size of the temperature probe basically cannot influence the battery, the area of the temperature probe (the platinum thermal resistor 3) in the working area 2 of the battery only occupies 2.66 percent of the working area, and the thermal inertia of the temperature probe is small due to the small size, and the dynamic response is quick. In addition, in order to prevent the temperature probe from being short-circuited with the catalytic layer, the temperature probe is also coated with Nafion which is electrically insulated, so that effective insulation is provided while the performance of the battery is not affected basically.
Example 2
The present embodiment provides a proton exchange membrane fuel cell with temperature monitoring, which includes a membrane electrode and a bipolar plate, where the membrane electrode adopts the proton exchange membrane electrode with temperature monitoring provided in embodiment 1, and the specific structure and manufacturing method of the proton exchange membrane electrode are the same as those of embodiment 1, and are not described herein again.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. The proton exchange membrane electrode with the temperature monitoring function comprises a proton exchange membrane body (1) and is characterized in that at least one platinum thermal resistor (3) for temperature monitoring is plated on the proton exchange membrane body (1), an insulating layer is arranged above the platinum thermal resistor (3) on the proton exchange membrane body (1), and a catalyst layer is arranged on the upper layer of the insulating layer on the proton exchange membrane body (1).
2. The proton exchange membrane electrode with temperature monitoring as claimed in claim 1, wherein the platinum thermal resistor (3) is distributed in a plurality.
3. The proton exchange membrane electrode with temperature monitoring function according to claim 1, wherein the platinum thermistor (3) comprises a temperature-sensitive region (31) and pins, the temperature-sensitive region (31) is arranged in the cell working region (2) on the proton exchange membrane body (1), and the temperature-sensitive region (31) is led out to the boundary of the proton exchange membrane body (1) through the two pins.
4. The proton exchange membrane electrode with temperature monitoring function as claimed in claim 3, wherein the temperature-sensitive region (31) is a platinum resistance wire with a snakelike distributed continuous structure, and the head end and the tail end of the platinum resistance wire are respectively led out through a pin.
5. The proton exchange membrane electrode with temperature monitoring as claimed in claim 4, characterized in that the pins comprise a lead wire (32) and a connecting block (33), the lead wire (32) is located in the cell working area (2) on the proton exchange membrane body (1) and is connected with the end of the platinum resistance wire, and the connecting block (33) is located in the non-cell working area (2) on the proton exchange membrane body (1) and leads the lead wire (32) out to the boundary of the proton exchange membrane body (1).
6. A proton exchange membrane electrode with temperature monitoring according to claim 5, characterised in that the area of each platinum thermistor (3) located in the cell active area (2) is in the range of 0.5% to 0.8% of the area of the cell active area (2).
7. The proton exchange membrane electrode with temperature monitoring function as claimed in claim 4, wherein the line width of the platinum resistance wire of the temperature sensing region (31) is 5-100 μm.
8. The proton exchange membrane electrode assembly with temperature monitoring as claimed in claim 1, wherein the proton exchange membrane body (1) comprises a Nafion membrane.
9. The proton exchange membrane electrode assembly with temperature monitoring of claim 1 wherein said insulating layer comprises a Nafion insulating layer.
10. A proton exchange membrane fuel cell with temperature monitoring comprises a membrane electrode and a bipolar plate, and is characterized in that the membrane electrode adopts the proton exchange membrane electrode with temperature monitoring as claimed in any one of claims 1 to 9.
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| CN202023308453.0U CN214753861U (en) | 2020-12-30 | 2020-12-30 | Proton exchange membrane electrode with temperature monitoring function and fuel cell |
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| CN202023308453.0U CN214753861U (en) | 2020-12-30 | 2020-12-30 | Proton exchange membrane electrode with temperature monitoring function and fuel cell |
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| CN112670542A (en) * | 2020-12-30 | 2021-04-16 | 同济大学 | Proton exchange membrane electrode with temperature monitoring function and fuel cell |
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| CN112670542A (en) * | 2020-12-30 | 2021-04-16 | 同济大学 | Proton exchange membrane electrode with temperature monitoring function and fuel cell |
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