Method for preparation of membrane electrode of proton exchange film fuel cells
A proton exchange membrane and fuel cell membrane technology, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve the problems of poor power generation performance of proton exchange membrane fuel cell membrane electrodes, and achieve uniform electrochemical reactions, Uniform thickness and improved power generation performance
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[0015] According to the preparation method of the membrane electrode provided by the present invention, the specific preparation method of the membrane electrode includes but not limited to the following two:
[0016] (1) Conductive agent slurry is coated on conductive substrate, obtains diffusion layer; Catalyst slurry is screen-printed on the obtained diffusion layer, obtains catalyst layer; Catalyst layer, diffusion layer and proton exchange membrane lamination then , so that the catalytic layer is located between the diffusion layer and the proton exchange membrane;
[0017] (2) The conductive agent slurry screen is coated on the conductive substrate to obtain the diffusion layer; the catalyst slurry is screen-printed on the proton exchange membrane to obtain the catalytic layer; then the catalytic layer, the diffusion layer and the proton exchange membrane layer combined so that the catalytic layer is located between the diffusion layer and the proton exchange membrane. ...
Embodiment 1
[0030] This example is used to illustrate the preparation method of the proton exchange membrane fuel cell membrane electrode provided by the present invention.
[0031]Carbon paper (Toray TGP-H-060, Japan) was used as the conductive substrate. The conductive base is placed on the vacuum adsorption platform of the screen printing machine, the screen printing plate (40 mesh nylon mesh, the thickness of the screen printing plate is 25 microns) is covered on the conductive base, and the conductive agent paste (containing weight Carbon black, polytetrafluoroethylene, and ethanol at a ratio of 1:0.08:4) were printed onto the conductive substrate with a thickness of 7 microns in one printing. Every printing, after drying at 120° C. with an infrared heating device, the second printing was performed until the thickness of the diffusion layer was 49. Sinter at 350°C for 30 minutes.
[0032] Place the conductive substrate with the printed diffusion layer on the vacuum adsorption platf...
Embodiment 2
[0040] This example is used to test the performance of the membrane electrode prepared in Example 1.
[0041] The membrane electrode b1 prepared in Example 1 was assembled into a fuel cell A1 with a battery separator, and the output voltage and output power of the above-mentioned activated fuel cell at different current densities were measured according to the following method: the fuel cell was connected to an external power supply Connect and connect a current stabilizer in series with the circuit, close the external power switch, adjust the current of the external power supply, and start to discharge the battery. , recorded as the initial voltage, then change the discharge current density of the battery, and record the output voltage of the battery at different discharge current densities, the results are as follows figure 1 As shown, and calculate the product of the discharge current density of the battery and the output voltage at the discharge current density is the outp...
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