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Fuel cell membrane electrode gas permeability test method, test cell and test device

A technology for fuel cell membranes and testing methods, which is applied in the fields of measuring devices, permeability/surface area analysis, suspension and porous material analysis, etc., and can solve the problems of reduced accuracy of test data, and achieve simple structure, high accuracy, and easy operation. convenient effect

Active Publication Date: 2011-12-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

In the process of testing the air permeability of the membrane electrode by the electrochemical method to test the hydrogen leakage current method, many factors such as the electric double layer and the adsorption state of the catalyst surface have a great influence, which reduces the accuracy of the test data; and during the test process, the adsorbed species on the catalyst surface And the adsorption state of the species, the purging time and the type of electrochemical instrument all have a great influence on the test results of the hydrogen permeation capacity of the membrane electrode.

Method used

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  • Fuel cell membrane electrode gas permeability test method, test cell and test device
  • Fuel cell membrane electrode gas permeability test method, test cell and test device
  • Fuel cell membrane electrode gas permeability test method, test cell and test device

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The cathode and anode prepared by screen printing and the new membrane electrode pressed by Dupont 212 film were used as samples. Place the fuel cell membrane electrodes on figure 2 In the middle of the two fixtures shown, air chambers are formed on both sides, and the test pool is used as a sample. The test sample is placed in figure 2 In the middle of the two clamps shown, an air chamber is formed on both sides, which is used as a test pool. A wire seal is used between the clamp and the sample, and an air chamber is formed on both sides. Install the schematic diagram of the test setup shown in the test test pool in the figure 1 on the test device shown. At a temperature of 25°C, hydrogen and nitrogen are introduced into both sides of the gas chamber at a humidification temperature of 25°C and a pressure of 0.1 MPa to keep the pressure on both sides of the gas chamber in balance. The pressure on both sides is mainly controlled by precision pressure gauges. Stab...

Embodiment 2

[0045] The fuel cell membrane electrodes after constant current operation for 400h were placed on figure 2 In the middle of the two clamps shown, an air chamber is formed on both sides, which is used as a test pool. A wire seal is used between the clamp and the sample, and an air chamber is formed on both sides. Put the test pool in accordance with the schematic diagram of the test device figure 1 installed on the test rig. In the test, the temperature of the test cell is 75°C, and the humidification temperature is 70°C, and the pressure is 0.1MPa hydrogen and 0.05MPa nitrogen, so that the pressure difference on both sides of the air chamber is maintained at 0.05MPa. . The pressure on both sides is mainly controlled by precision pressure gauges. Stable for 6 hours, use a gas chromatograph to detect the concentration of the measured gas permeating from the other side of the membrane electrode in the inert gas flowing out of the test cell, and record the chromatogram, see t...

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Abstract

The invention discloses a test method and device of the air permeability of a membrane electrode of a fuel cell, which can be used for testing the air permeability of the membrane electrode of the fuel cell under actual running conditions. The method comprises the following steps of: assembling the membrane electrode in a testing pool, wherein a gas inlet and outlet channel is arranged at one side of the test pool and a test channel is formed at the other side of the test pool; and respectively introducing tested gas and carrier gas to two sides of the test pool, introducing a gas outlet at the carrier gas side of the test pool into a gas chromatography, and calculating the air permeability of the membrane electrode through testing the content of the tested gas in the tested carrier gas through the gas chromatography. The test device of the air permeability of the membrane electrode mainly comprises the test pool and an air permeability test system. The test pool consists of two plate clamps and corresponding sealing materials, wherein each plate clamp is provided with a gas inlet and a gas outlet. The invention provides an intrinsic test method for testing the air permeability of the membrane electrode of the fuel cell accurately and effectively; and the test pool and the test device have the advantages of simple structure, easiness in control and low cost and can be used for accurately representing the intrinsic air permeability of the membrane electrode under offline or online state.

Description

Technical field [0001] The present invention involves a test method and special device for testing pools and special devices. Specifically, it is a test method and test pool and testing device for fuel cell membrane electrode permeability. Background technique [0002] Energy and environment are the two major factors in the development of human society. With the increase of population and the rapid development of the economy, fossil energy will gradually exhaust, and at the same time, a large amount of consumption of fossil energy will cause serious environmental pollution.According to statistics, urban air pollution is mainly derived from automotive gas pollution.Therefore, research, development and use of renewable clean vehicles to achieve diversification of energy and ensure that national energy safety and environmental protection are of great significance. [0003] Fuel Cell is a temperature -electrochemical power generation device that directly converts chemical energy into...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 钟和香张华民王美日刘宗浩邱艳玲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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