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Fuel cell containing gas diffusion layer

A gas diffusion layer and fuel cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of insufficient catalytic performance of non-platinum catalysts, poisoning of platinum catalysts, and high manufacturing costs, and achieve excellent catalytic action, high voltage and power density, the effect of reducing manufacturing costs

Pending Publication Date: 2019-12-24
浙江晨阳新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems that the existing catalyst materials used for fuel cells are too high, the platinum catalyst is easily poisoned by CO and other impurities, or the catalytic performance of the non-platinum catalyst is not excellent enough, and the manufacturing cost is high. A proposed fuel cell comprising a gas diffusion layer, according to the preparation method of the gas diffusion layer provided by the present invention, is low in cost, easy to operate, and the obtained catalyst material has a low loading capacity, and has good catalytic performance when used in a fuel cell

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0048] Preparation of non-platinum catalyst materials:

[0049] Take 1 g of carbon nanotubes, wash them with deionized water several times, then dry them for later use. Take 400 mg of the above-mentioned dried carbon nanotubes, 3 mL of aniline solution, and 5 g of ferric chloride, and add them to 0.5 mol / L 250 mL of hydrochloric acid solution, and then add 2.5 g of ammonium persulfate to carry out in-situ polymerization for 24 hours, and then the product Dry to obtain the polyaniline-carbon nanotube composite. The obtained polyaniline-carbon nanotube composite was placed in a tube furnace, and argon was introduced at a rate of 100 mL / min, and reacted at 900° C. for 1 h to obtain a primary heating product. Wash the obtained primary heating product with 1mol / L hydrochloric acid to remove excess metal impurities, vacuum-dry it, place it in a tube furnace, pass argon gas at a rate of 100mL / min, and react at 900°C for 3h to obtain Non-platinum catalyst materials. Figure 7 The p...

Embodiment 2

[0059] Preparation of non-platinum catalyst materials:

[0060] Take 1g of carbon black, wash it several times with deionized water, then dry it and set it aside. Take 750 mg of the above-mentioned dried carbon black, 5 mL of pyrrole solution, and 5 g of ferric nitrate and add them to 0.1 mol / L of 250 mL of hydrochloric acid solution, and then add 2.5 g of ammonium persulfate to carry out in-situ polymerization for 15 hours, and then dry the product to obtain polypyrrole - Carbon black complex. The obtained polypyrrole-carbon black composite was placed in a tube furnace, and argon was introduced at a rate of 100 mL / min, and reacted at 1200° C. for 1 h to obtain a primary heating product. The obtained primary heating product was washed with 0.85mol / L hydrochloric acid to remove excess metal impurities, dried in vacuum, placed in a tube furnace, fed with argon gas at a rate of 100mL / min, and reacted at 800°C for 5h. A non-platinum catalyst material is obtained.

[0061] Prepa...

Embodiment 3

[0067] Preparation of non-platinum catalyst materials:

[0068] Take 1g of graphene, wash it with deionized water several times, then dry it and set it aside. Take 250 mg of the above-mentioned dried graphene, 1.25 mL of naphthylamine, and 5 g of ferric sulfate and add them to 0.8 mol / L of 250 mL of hydrochloric acid solution, then add 2.5 g of ammonium persulfate to carry out in-situ polymerization for 24 hours, and then dry the product to obtain poly Naphthylamine-graphene composites. The obtained polynaphthylamine-graphene composite was placed in a tube furnace, and argon was introduced at a rate of 100 mL / min, and reacted at 800° C. for 5 h to obtain a primary heating product. Wash the obtained primary heating product with 0.5mol / L hydrochloric acid to remove excess metal impurities, vacuum-dry it, place it in a tube furnace, pass argon gas at a rate of 100mL / min, and react at 1200°C for 3h. A non-platinum catalyst material is obtained.

[0069] Preparation of the gas d...

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Abstract

The invention discloses a fuel cell containing a gas diffusion layer. The fuel cell comprises a substrate and a conductive microporous layer. The conductive microporous layer is arranged on at least one side of the substrate. The substrate is porous carbon paper. The conductive microporous layer is mainly made of a non-platinum catalyst material. The preparation method of the gas diffusion layer comprises the steps that the non-platinum catalyst material is prepared; the non-platinum catalyst material, polytetrafluoroethylene and isopropanol are uniformly mixed to prepare slurry; and the slurry is placed in a spraying device and sprayed uniformly on the porous carbon paper to acquire the gas diffusion layer. According to the invention, the gas diffusion layer of the fuel cell has both adsorption performance and catalytic performance, and the electrode performance of the fuel cell is significantly improved compared with the electrode performance of the existing battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a fuel cell including a gas diffusion layer. Background technique [0002] A fuel cell is a power generation device that converts the chemical energy of fuel directly into electrical energy. It uses hydrogen, natural gas, methanol and other fuels and pure oxygen or air as raw materials to undergo oxidation-reduction reactions at the cathode and anode of the battery, thereby continuously generating direct current. . This type of battery has the advantages of high power generation efficiency and less environmental pollution. Because its electrical energy conversion does not go through the combustion process, the energy conversion efficiency can reach about 60%. At the same time, the power range of fuel cells is 1W-100MW, which can be widely used in transportation, portable equipment, power stations, aerospace and other fields. At present, the fuel cell technology is relatively ...

Claims

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Application Information

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IPC IPC(8): H01M8/0234H01M4/90
CPCH01M8/0234H01M4/9083Y02E60/50
Inventor 陈忠伟余爱萍毛治宇张益宁
Owner 浙江晨阳新材料有限公司
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