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Method for activating membrane electrode of fuel cell

A fuel cell membrane and activation method technology, which is applied to fuel cell parts, battery electrodes, battery circuit devices, etc., can solve the problems of long activation time, achieve high output power, uniform area activation, and shorten activation time

Active Publication Date: 2008-03-05
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a fuel cell membrane that can make the battery have a large output power in a short time in order to overcome the defect that the existing fuel cell membrane electrode activation method requires a long activation time to achieve high output power. Electrode activation method

Method used

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  • Method for activating membrane electrode of fuel cell

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Effect test

Embodiment 1

[0027] This embodiment illustrates the activation method of the fuel cell membrane electrode provided by the present invention

[0028] 1. Preparation of Membrane Electrode

[0029] (1) 0.2 parts by weight of carbon black (Vulcan XC72R, Cabot company) and 0.1 parts by weight of PTFE emulsion (FR303A, Shanghai Sanaifu New Material Co., Ltd.) with a solid content of 60% by weight, and 10 parts by weight of deionized water are mixed , ultrasonically dispersed for 30 minutes to obtain a carbon dispersion, and then the carbon dispersion was coated on carbon paper (TGP-H-90, Toray Company), and the weight gain of the carbon paper after drying at 100°C was 1 mg / cm 2 , and then placed in a high-temperature oven at 350 ° C for 20 minutes to obtain a gas diffusion layer;

[0030] (2) 0.2 parts by weight of Pt / C catalyst (Hispec8100, product of Johnson Matthey Company) with platinum loading of 47.7% by weight and 2 parts by weight of nafion dispersion (DE520, product of DUPONT Company) ...

Embodiment 2

[0037] This embodiment illustrates the activation method of the fuel cell membrane electrode provided by the present invention

[0038] Prepare and activate the membrane electrode according to the method of Example 1, the difference is that the temperature of the battery is controlled to be 65 ° C, the humidification temperature of the anode and cathode fuel is 60 ° C, and the relative humidity is 100%, and the positive electrode of a stabilized power supply and The negative electrode is connected to the anode and cathode of the fuel cell respectively, and the current of the regulated power supply is adjusted to stabilize the current density of the fuel cell at 0.05 ampere / cm 2 , discharge the fuel cell for 10 minutes, and then continue to adjust the current of the regulated power supply to stabilize the current density of the fuel cell at 0.08 ampere / cm 2 , discharge the fuel cell for 10 minutes, and continue to adjust to stabilize the discharge current density of the fuel ce...

Embodiment 3

[0040] This embodiment illustrates the activation method of the fuel cell membrane electrode provided by the present invention

[0041] Prepare and activate the membrane electrode according to the method of Example 1, except that the temperature of the battery is controlled at 55° C., the humidification temperature of the anode and cathode fuels is 50° C., and the relative humidity is 80%. Adjust the current of the external power supply to stabilize the current density of the fuel cell at 0.4 amps / cm 2 , discharge the fuel cell for 10 minutes, and then continue to adjust the current of the external power supply to make the current density of the fuel cell 0.72 amperes / cm 2 , discharge the fuel cell for 30 minutes, then disconnect the external power supply, stop the discharge of the fuel cell, let it stand for 2 minutes, and then adjust the current of the external power supply again to stabilize the current density of the fuel cell at 0.4 ampere / cm 2 , 1.0 A / cm 2 , discharge ...

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Abstract

This invention relates to an activating method for membrane electrodes of fuel cells including penetrating an anode fuel and cathode fuel into an anode chamber and a cathode chamber of the fuel battery to let it discharge including multiple discharge periods and at least one time interval among them and the battery discharges in a constant current density in each period.

Description

technical field [0001] The invention relates to a method for activating a membrane electrode, more specifically, relates to a method for activating a fuel cell membrane electrode. Background technique [0002] A fuel cell is an energy conversion device that converts chemical energy stored in fuels (such as hydrogen, lower alcohols, etc.) and oxidants (oxygen) into electrical energy according to electrochemical principles. Fuel cells have the advantages of high energy conversion rate and environmental friendliness, while Proton Exchange Membrane Fuel Cell (PEMFC) has the advantages of low temperature operation and high specific power, and is a new type of power source widely used. [0003] The reaction formulas of the anode reaction and the cathode reaction of the fuel cell using hydrogen as fuel are shown in the reaction formulas (1) and (2) respectively, and the oxygen used as the oxidant on the cathode is usually from the air. The ion conduction that transfers the protons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/02H02J7/00
CPCY02E60/50
Inventor 翟玉清赵志强
Owner BYD CO LTD
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