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A method for testing the vertical direction resistance of fuel cell catalytic layer

A vertical direction, fuel cell technology, applied in the direction of material electrochemical variables, measuring electricity, measuring electrical variables, etc., to achieve the effect of real data and flexible and convenient testing

Active Publication Date: 2020-11-06
SUNRISE POWER CO LTD
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Problems solved by technology

The deficiency of the prior art is: there is no method for separately testing the vertical direction resistance of the catalytic layer by electrochemical methods in the prior art

Method used

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  • A method for testing the vertical direction resistance of fuel cell catalytic layer
  • A method for testing the vertical direction resistance of fuel cell catalytic layer

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with drawings and embodiments.

[0021] The method for testing the vertical resistance of the fuel cell catalyst layer comprises the following steps:

[0022] 1) Select a commercial gas diffusion layer with a thickness of 150-300 μm, and cut it into a thickness of 25 cm 2 The shape of the small single cell test fixture is matched. Under the condition of setting the assembly force at 4N·m for reinforcement, the cut gas diffusion layer is assembled in the small single cell test fixture, and the initial performance of the conventional membrane electrode is set in the test environment. The test conditions are 70°C, normal pressure, the flow rate of hydrogen gas into the anode and air into the cathode is 200mL / min, and the gas diffusion layer is vertically tested by the constant current method and the AC impedance method of the electrochemical workstation. For the resistance test of the direction, each tes...

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Abstract

A method for testing vertical direction resistance of a fuel cell catalyst layer comprises the steps of: separately testing a gas diffusion layer resistance and a gas diffusion electrode resistance byan electrochemical workstation, and subtracting the gas diffusion layer resistance from the gas diffusion electrode resistance to obtain a vertical resistance of the catalyst layer. The beneficial effects are as follows: the test conditions are the same as the membrane electrode test environment, the data is real and reliable; the test environment is adjustable, and for different demand tests, the test is flexible and rapid; the same clamp test is used without the errors caused by different clamps; and moreover, the data can be applied to the simulation model or the theoretical calculation tohave an important meaning for the positive development of the membrane electrode.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the test and development of the vertical direction resistance of the catalyst layer of the fuel cell. Background technique [0002] The electrode of the proton exchange membrane fuel cell is composed of a catalytic layer coated on the proton exchange membrane or coated on the gas diffusion layer. For the resistance test of the electrode, most documents in the prior art disclose the overall ohmic resistance of the membrane electrode by electrochemical means and the horizontal resistance of the catalytic layer by the four-probe method. The disadvantage of the prior art is that there is no method for separately testing the resistance in the vertical direction of the catalytic layer by an electrochemical method in the prior art. With the deepening of the forward development of membrane electrodes, theoretical calculations and simulations require the input of various physical parameters, an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01R31/389G01R31/378
CPCG01N27/48
Inventor 王强邢丹敏李娜胡景春陈桂银徐丽双刘穆誉
Owner SUNRISE POWER CO LTD
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