A method for making film electrode of direct alcohol fuel battery

A fuel cell membrane and electrode technology, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve the problems that the power density cannot reach the practical level and the battery life needs to be further improved, so as to improve the catalytic efficiency and The utilization rate of the catalyst, the effect of improving the performance and its stability, and improving the catalytic activity and efficiency

Inactive Publication Date: 2008-09-17
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as the current status of the development of these two batteries is concerned, their power density has not yet reached the level of practical use, and at the same time the battery life needs to be further improved.

Method used

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  • A method for making film electrode of direct alcohol fuel battery
  • A method for making film electrode of direct alcohol fuel battery
  • A method for making film electrode of direct alcohol fuel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Weigh 18mg of XC-72 carbon and 40mg of polytetrafluoroethylene emulsion with a mass ratio concentration of 12.4wt.%, and disperse in 1mL of isopropanol aqueous solution. The volume ratio of isopropanol and water is 1:1, and ultrasonically disperse 2h to get a uniform slurry.

[0040] 2. Weigh 25 mg of platinum ruthenium black and place them in containers a and b, add 50 mg of ultrapure water to wet all the catalysts, add 85 mg of Nafion resin solution with a mass ratio concentration of 5.3 wt.%, and then add 2 mL of isopropyl A mixture of alcohol and water is used as a dispersant, the volume ratio of isopropanol and water is 1:1, the temperature is controlled at 80°C, and b is heated for 2 hours, and both a and b are ultrasonically dispersed for 2 hours.

[0041] 3. Take two sheets with an area of ​​about 3×3cm 2 The carbon paper is used as the anode support layer, the carbon paper model is TGP-H-060, the hydrophobicity is 0wt.%, respectively marked as a, b, take a ...

Embodiment 2

[0046] 1. Weigh 16.1 mg of XC-72 carbon into the container, then add 40 mg of polytetrafluoroethylene emulsion with a mass ratio concentration of 12.4 wt.% and 1 ml of isopropanol as a binder and dispersant, isopropanol and The volume ratio of water is 1:1~3:1, and a uniform slurry can be obtained by ultrasonic dispersion for 3 hours.

[0047] 2. Weigh 80.3mg of Pt / C catalyst containing Pt60%, add 100ml of ultrapure water to wet all the catalyst, add 267.3mg of Nafion resin solution with a mass ratio concentration of 5.3wt.%, and then add 3mL of isopropanol and water The mixture of isopropanol and water was used as a dispersant, the volume ratio of isopropanol and water was 3:1, the temperature was controlled at 80°C for 1 hour, and ultrasonically dispersed for 3 hours.

[0048] 3. Take a sheet with an area of ​​about 2×4cm 2 carbon paper, its model is TGP-H-060, and its hydrophobicity is 20wt.% as the supporting layer of the composite cathode. 2 In the region, the weight of...

Embodiment 3

[0054] 1. Weigh 16.1 mg of XC-72 carbon into the container, then add 40 mg of polytetrafluoroethylene emulsion with a mass ratio concentration of 12.4 wt.% and 1 ml of isopropanol as a binder and dispersant, isopropanol and The volume ratio of water is 1:1, and a uniform slurry can be obtained by ultrasonic dispersion for 3 hours.

[0055] 2 Weigh two 40.0mg Pt / C catalysts containing Pt60% and add them to containers a and b respectively, add 50ml ultrapure water to wet all the catalysts, then add 133.7mg Nafion resin with a mass ratio concentration of 5.3wt.% solution, and then add 3mL isopropanol aqueous solution as a dispersant, the volume ratio of isopropanol and water is 1:1, control the temperature at 30°C, and ultrasonically disperse for 3h. Take b and treat it in a 75°C water bath for 2h.

[0056] 3Take two sheets with an area of ​​about 2×2cm 2 Carbon paper, whose model is TGP-H-060, with a hydrophobicity of 20wt.%, is used as the supporting layer of the composite ca...

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Abstract

The present invention provides a method of preparing a direct higher alcohol battery membrane electrode, characterized in that the method includes following steps: A. dispersing a catalyst and a first binder to a dispersant, obtaining slurry; B. heating the slurry 10 min-3 hours under 40-100 DEG C, then ultrasonic heating 10 mins-2hours, forming uniform slurry; C. coating the slurry on the support layer to form a membrane electrode. The method of the preparing direct higher alcohol battery membrane electrode of the invention is simple, and easy to operate, markedly improving the power density and the stability of the fuel battery by adjusting and controlling the aggregation state of the first binder. The membrane electrode of the invention effectively improves the catalytic activity and the efficiency of the electrode, improving the catalytic activity and the utilization ratio of the catalyst of the fuel battery membrane electrode, effectively improving the performance and the stability of the battery, reducing the polarization loss of the battery, so as to improve the performance of the fuel battery.

Description

technical field [0001] The invention relates to a method for preparing membrane electrodes of direct alcohol fuel cells. Background technique [0002] Fuel cell power generation device has high energy conversion efficiency, less environmental pollution, and can be used as an ideal power source in the future. Therefore, it has attracted extensive attention from scientists all over the world. For this reason, countries all over the world have invested a lot of manpower, material and financial resources in research. In the past ten years, with the rapid development and popularization of portable electronic products (such as mobile phones, handheld computers, MP3, etc.), users have increasingly high requirements for high specific energy chemical power supplies. In order to meet the high energy density requirements of various new electronic products, since the mid-1990s, many well-known companies and scientific research institutions around the world have been trying to develop lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/88H01M8/1004
CPCY02E60/50Y02P70/50
Inventor 杨辉康永印袁婷曹剑瑜邹志青黄庆红杜翀夏保佳
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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