Preparation method of electrode of proton exchange membrane fuel cell and proton exchange membrane fuel cell

A technology for fuel cell electrodes and proton exchange membranes, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as poor repeatability, complicated operation, and long production time

Active Publication Date: 2015-02-18
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above methods all have the disadvantages of complicated operation, long production time and poor repeatability.

Method used

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  • Preparation method of electrode of proton exchange membrane fuel cell and proton exchange membrane fuel cell
  • Preparation method of electrode of proton exchange membrane fuel cell and proton exchange membrane fuel cell
  • Preparation method of electrode of proton exchange membrane fuel cell and proton exchange membrane fuel cell

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preparation example Construction

[0038] The invention discloses a method for preparing a proton exchange membrane fuel cell electrode, which comprises the following steps:

[0039] a) Place the support layer on the surface of the bottom plate and fix it with negative pressure;

[0040] b), using ultrasonic spraying to spray the catalyst slurry on the surface of the support layer under the action of the carrier gas;

[0041] c), drying;

[0042] d) heat treatment to obtain proton exchange membrane fuel cell electrodes.

[0043] The reason why the present invention adopts the mode of ultrasonic spraying to prepare catalyst layer mainly lies in the following points:

[0044] First of all, ultrasonic spraying is to spray the catalyst slurry layer by layer on the surface of the support layer under the action of carrying current. Compared with the paste method and rolling method, the uniformity of the catalyst distribution on the surface of the support layer is improved, thereby improving the catalyst efficiency....

Embodiment 1

[0074] 1. Prepare anode catalyst slurry

[0075] 101. Weigh 0.4g of 40wt%Pt20wt%Ru / C catalyst, add 2ml of deionized water, and stir ultrasonically for 5 minutes;

[0076] 102. Add 12 ml of deionized water and ethanol mixed solvent with a volume ratio of 5:1, 0.3 g of polytetrafluoroethylene emulsion (solid content 50%), and 3 ml of Nafion solution with a concentration of 5 wt%, and stir ultrasonically for 30 minutes to obtain a catalyst anode slurry.

[0077] 2. Spraying

[0078] Take an area of ​​200cm 2 The carbon paper is placed on the porous bottom plate and fixed under negative pressure. The bottom plate is heated to 45°C, and then the above catalyst slurry is sprayed uniformly on the porous bottom plate by ultrasonic spraying, using nitrogen as the carrier gas, and the flow rate is 10ml / min;

[0079] 3. After spraying, place it at room temperature for 30 minutes to dry;

[0080] 4. Put the electrode obtained in step 3 into a muffle furnace under the protection of nit...

Embodiment 2

[0082] 1. Prepare anode catalyst slurry

[0083] 101. Weigh 0.4g of 40wt%Pt20wt%Ru / C catalyst, add 2ml of deionized water, and stir ultrasonically for 5 minutes;

[0084] 102. Add 12 ml of deionized water and ethanol mixed solvent with a volume ratio of 5:1, 0.08 g of polytetrafluoroethylene emulsion (50% solid content), and 2 ml of Nafion solution with a concentration of 5 wt%, and stir ultrasonically for 30 minutes to obtain a catalyst anode slurry.

[0085] 2. Spraying

[0086] Take an area of ​​200cm 2 The carbon paper was placed on the porous bottom plate and fixed under negative pressure. The bottom plate was heated to 65°C, and then the above catalyst slurry was sprayed evenly on the porous bottom plate by ultrasonic spraying with argon as the carrier gas at a flow rate of 15ml / min.

[0087] 3. After spraying, leave it at room temperature for 40 minutes to dry.

[0088] 4. Put the electrode obtained in step 3 into a muffle furnace under the protection of nitrogen, a...

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Abstract

The invention provides a preparation method of a proton exchange membrane fuel cell and an electrode. The preparation method of the electrode comprises the following steps of: a) arranging a supporting layer on the surface of a bottom plate and fixing by pumping to be a negative pressure; b) ultrasonically spraying catalyst slurry on the surface of the supporting layer under a current-carrying effect of a carrier gas; c) draying; and d) carrying out heat treatment to obtain the electrode of the proton exchange membrane fuel cell. According to the method provided by the invention, the catalyst is sprayed on the surface of the supporting layer in a layer-by-layer manner, so that the catalyst is uniformly distributed. Therefore, the utilization rate of the catalyst is improved, and the properties of the electrode are optimized. Furthermore, the method has the advantages of simplicity and convenience in operation, and stable spraying effect. The technical personnel in the field can adjust the catalyst slurry and the current-carrying speed according to the expected thickness, density and the like of an catalyst layer, so that the method provided by the invention has higher repeatability to the same product. Furthermore, the method is short in preparation time, so that the production period is reduced.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a proton exchange membrane fuel cell electrode and a preparation method for the proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a new type of device that can directly convert chemical energy into electrical energy. Since the proton exchange membrane battery has no internal energy consumption of rotating parts and does not undergo combustion, the energy conversion efficiency is not limited by the Carnot cycle, so it has a relatively high energy conversion efficiency. Moreover, the proton exchange membrane battery uses clean energy, such as hydrogen and methanol, without sulfur oxide and nitride emissions, no harm to the environment, and high environmental protection. Proton exchange membrane batteries also have the characteristics of mild working conditions, small size, light weight, safety and durability, and are widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 刘长鹏梁亮严亮廖建辉李晨阳邢巍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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