Test method of fuel cell catalytic layer metal loads

A test method and fuel cell technology, applied in the direction of measuring devices, analyzing materials, and using wave/particle radiation for material analysis, etc., can solve the problems of fast and accurate online monitoring, no catalyst loading, etc., and achieve fast detection and testing The method is simple and reliable

Active Publication Date: 2014-06-25
中科嘉鸿(佛山市)新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the current research and small-scale production, the weighing method is still used to measure the catalyst, and there is no fast and accurate online monitoring method for the catalyst loading in the fuel cell anode or cathode catalyst layer

Method used

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  • Test method of fuel cell catalytic layer metal loads
  • Test method of fuel cell catalytic layer metal loads
  • Test method of fuel cell catalytic layer metal loads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Using ultrasonic automatic spraying method to accurately spray on the PTFE membrane, the loading capacity is: 1, 2, 3, 4, 5, 6 mg / cm 2 The JM60%Pt / C catalyst, the copper foil with a thickness of 50 microns is used as the background sample, and the Pt signal is measured by an X-ray fluorescence spectrometer. The test condition is that the filter material is selected as Pd medium, and the test time is 50 seconds. The ratio of the peak-to-peak strength of 9.44 keV to the peak strength of the background sample copper foil response signal at 8.05 keV is divided by the total number of counts, which is used as the y coordinate and the Pt load as the x coordinate, and the standard curve is drawn.

[0040] The calculation formula fitted by the standard curve is: y=0.22x+0.90

[0041] The Pt load of 60%Pt / C(JM) prepared on the gas diffusion layer by brush coating method is 1.86mg / cm 2 Place the catalytic layer of the cathode downward on the test window of the x-ray fluoresce...

Embodiment 2

[0042] Example 2: Using ultrasonic automatic spraying method to accurately spray on the PTFE membrane, the loading capacity is: 1, 2, 3, 4, 5, 6 mg / cm 2 The JM60%Pt / C catalyst, the copper foil with a thickness of 50 microns is used as the background sample, and the Pt signal is measured by an X-ray fluorescence spectrometer. The test condition is that the filter material is selected as Pd medium, the test time is 50 seconds, and the Pt response signal The ratio of the peak-to-peak strength of 9.44 keV to the peak strength of the background sample copper foil response signal at 8.05 keV is divided by the total number of counts, which is used as the y coordinate and the Pt load as the x coordinate, and the standard curve is drawn.

[0043] The calculation formula fitted by the standard curve is: y=0.22x+0.90

[0044] The Pt loading of 60%Pt / C(JM) prepared on carbon cloth by brushing method is 1.73mg / cm 2 Place the catalytic layer of the cathode downward on the test window of the x-ray...

Embodiment 3

[0045] Example 3: Using ultrasonic automatic spraying method to accurately spray on the PTFE membrane, the loading capacity is: 1, 2, 3, 4, 5, 6 mg / cm 2 The JM60%Pt / C catalyst, the copper foil with a thickness of 50 microns is used as the background sample, and the Pt signal is measured by an X-ray fluorescence spectrometer. The test condition is that the filter material is selected as Pd medium, and the test time is 50 seconds. The ratio of the peak-to-peak strength of 9.44 keV and the peak strength of the background sample copper foil response signal at 8.05 keV is divided by the total number of counts, which is used as the y coordinate and the Pt load as the x coordinate, and the standard curve is drawn.

[0046] The calculation formula fitted by the standard curve is: y=0.22x+0.90

[0047] Place the cathode catalyst layer with a Pt loading of 4.05mg / cm2 with a Pt loading of 4.05mg / cm2 and 40% Pt / C(JM) prepared by brush coating method on the x-ray fluorescence spectrometer. Plac...

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Abstract

The invention discloses a test method of fuel cell catalytic layer metal loads, and the method is as follows: (1) establishment of a standard curve, to be more specific, preparing more than three metal-element-containing catalysts with different loads on the surface of a substrate material according to a predetermined load, using an X-ray fluorescence spectrometer to test response signals of metal elements on the substrate material, using the ratio of response signals of the metal elements to response signals of a background sample as Y coordinates and the metal loads as X coordinates to draw the standard curve; (2) the catalytic layer load test, to be more specific, using the same background sample and same testing conditions of the standard curve test to test response signals of the metal and the background sample; and (3) the catalytic layer load calculation, to be more specific, establishing a metal load calculation formula according to the standard curve, and substituting test results into the formula to calculate the corresponding metal loads. Compared with the prior art, the test method is simple, reliable and fast without damage on a fuel cell catalyst layer.

Description

Technical field [0001] The invention relates to a method for testing the loading of noble metals in a fuel cell catalytic layer, in particular to a method for quickly testing the loading of electrode catalysts in batches. This method is fast and lossless and can almost meet the requirements of online testing Background technique [0002] With the continuous progress of related research, the prospects for the practical application of direct alcohol fuel cells have become increasingly clear. Membrane electrode (MEA) is the core component of direct alcohol fuel cells, and the guarantee of the mass production process of MEA is one of the prerequisites for commercialization. In the batch preparation process of MEA, in order to ensure its consistency and repeatability, the control of the catalyst loading is a key factor. In order to control the catalyst loading of the catalytic layer, there must be an effective method that can quickly and accurately test the catalyst loading of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
Inventor 孙公权夏章讯景粉宁王素力
Owner 中科嘉鸿(佛山市)新能源科技有限公司
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