Method for preparing electrode for fuel cell

An electrode and substrate technology, applied in the field of electrode preparation, can solve the problems that the electrode needs to be improved, and achieve a good hydrophobic effect

Active Publication Date: 2015-02-11
4MICRO TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the electrode, such as output performance, has yet to be improved.

Method used

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  • Method for preparing electrode for fuel cell
  • Method for preparing electrode for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The 250 μm thick carbon cloth was immersed in polytetrafluoroethylene (PTFE) emulsion four times, and the sample was dried after each immersion (using low-temperature rapid drying), and finally sintered at 340 ° C. The weight percentage of polytetrafluoroethylene is about 20%.

[0080] 2 g of carbon black, 0.2 g of carbon nanotubes, 0.8 g of polytetrafluoroethylene (PTFE) and 20 g of water as a solvent were ultrasonically mixed, and then heated (about 50° C.) to obtain a slurry. This mixture was coated on the above-mentioned PTFE-treated carbon cloth with a thickness of 250 μm, and sintered at 340° C. to form a microporous layer.

[0081] Take 20ml of 0.5mol / L Ni(NO 3 ) 2 Ethanol solution, add 1.0g of polyethylene glycol, heat to dissolve, as a catalyst solution, immerse the carbon cloth with a microporous layer obtained above in the catalyst solution for 20min, take it out, and dry it; The carbon is arranged in the middle area of ​​the quartz tube in the horizontal ...

Embodiment 2

[0090] The 250 μm thick carbon cloth was immersed in polytetrafluoroethylene (PTFE) emulsion four times, and the sample was dried after each immersion (using low-temperature rapid drying), and finally sintered at 340 ° C. The weight percentage of polytetrafluoroethylene is about 20%.

[0091] 2g of carbon black, 0.2g of carbon nanotubes, 0.8g of polytetrafluoroethylene (PTFE) and 20g of water as a solvent were ultrasonically mixed, and then heated (about 50°C) to obtain a slurry, in which pore-forming CaCO 3 (0.01g) and mix well. This mixture was coated on the above-mentioned PTFE-treated carbon cloth with a thickness of 250 μm, and sintered at 340° C. to form a microporous layer.

[0092] Take 20ml of 0.1~1mol / L Ni(NO 3 ) 2 Ethanol solution, add 0.1-2.0g of polyethylene glycol, heat to dissolve, as a catalyst solution, immerse the carbon cloth with a microporous layer obtained above in the catalyst solution for 20min, take it out, and dry it; The carbon with the catalyst...

Embodiment 3-5

[0096] Basically consistent with Example 2, only the components and contents of the microporous layer were changed in Examples 3-5, and the specific data and results are listed in Table 2.

[0097] Table 2

[0098]

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Abstract

The invention relates to method for preparing an electrode for a fuel cell. The method includes the steps: 1) providing an electrode substrate; 2) forming a microporous layer on the electrode substrate; 3) forming a nano carbon layer on the surface of the microporous layer; and 4) forming a catalyst layer on the surface of the nano carbon layer. The microporous layer is formed by using a specific method. The fuel cell prepared by the method disclosed by the invention has extremely high electrochemical efficiency and output power.

Description

technical field [0001] The invention relates to a method for preparing an electrode, in particular to a method for preparing an electrode suitable for a fuel cell. Background technique [0002] A fuel cell is a power generating device that directly converts chemical energy present in fuel and oxidant, including hydrogen and hydrocarbons such as methanol, ethanol or natural gas, into electrical energy. [0003] The main components of a fuel cell include electrodes, electrolyte membranes, and current collectors. The difference between the electrode and the flat plate electrode of the general battery is that the electrode of the fuel cell is a porous structure, and its purpose is to increase the actual working current density of the fuel cell and reduce the polarization. At present, the electrodes of high-temperature fuel cells are mainly made of catalytic materials, such as Y 2 o 3 -stabilized-ZrO 2 (referred to as YSZ) and nickel oxide electrodes of molten carbonate fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/96H01M4/92H01M4/90H01M4/88
CPCH01M4/88H01M4/90H01M4/9083H01M4/926H01M8/0241Y02E60/50
Inventor 张映波杨华
Owner 4MICRO TECH COMPANY
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