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CCM for fuel cell membrane electrode and production method thereof

A fuel cell membrane and production method technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of precious metal particles falling off, blocking hydrogen transmission, accelerating the corrosion and dissolution of carbon carriers, etc., to improve catalytic activity and improve stirring effect. Effect

Pending Publication Date: 2022-05-17
安徽明天新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during use, the anode flow channel may be blocked, resulting in poor hydrogen transmission. When the anode is undergassed, the anode will generate a high voltage of 1.3V, which will accelerate the corrosion and dissolution of the carbon carrier.
Corrosion of the carbon support will cause the shedding of noble metal particles, reducing the activity and life of the anode catalyst

Method used

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  • CCM for fuel cell membrane electrode and production method thereof
  • CCM for fuel cell membrane electrode and production method thereof
  • CCM for fuel cell membrane electrode and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A kind of CCM that is used for the membrane electrode of fuel cell, the anode catalyst that described CCM adopts is Pt / Ti 4 o 7 , where Pt is the active component, Ti 4 o 7 As a carrier, the mass fraction of Pt is 60%, and the cathode catalyst adopted by the CCM is Pt 6 co 1 mn 1 / GC, wherein the mass fraction of platinum cobalt manganese is 60%.

[0068] Carbon powder and fine Ti 4 o 7 The relevant physical properties of the powder are as follows:

[0069]

[0070]

[0071] Ti 4 o 7 The specific surface area of ​​powder and carbon powder is similar, both are suitable as catalyst carrier. The primary particle size is similar, and both are suitable for conventional slurry dispersion and ultrasonic spraying. In a reducing environment at 80°C, Ti 4 o 7 The powder still maintains a high electrical conductivity. So in the conductivity of the anode carrier, Ti 4 o 7 The powder is comparable to carbon powder. However, in an oxidizing environment at 80°C,...

Embodiment 2

[0073] A kind of production method of the CCM that is used for fuel cell membrane electrode, such as Figure 1-6 shown, including: anode catalyst Pt / Ti 4 o 7 Preparation method, cathode catalyst graphite carbon supported platinum cobalt manganese (Pt 6 co 1 mn 1 / GC) preparation method, the preparation method of anode slurry, the preparation method of cathode slurry and the spraying preparation method of CCM;

[0074] Among them, the anode catalyst Pt / Ti 4 o 7 The preparation method comprises the steps:

[0075] S1: First set H 2 PtCl 6 solution, Ti 4 o 7 The powder and volatile solvent are evenly mixed and dispersed by the stirring device to form a paste;

[0076] S2: Then put the paste into a low-temperature environment of -55°C and freeze for 3 hours to obtain frozen paste H 2 PtCl 6 / Ti 4 o 7 ;

[0077] S3: Then dry under vacuum conditions from -55°C to 85°C for 20h to obtain H 2 PtCl 6 / Ti 4 o 7 powder;

[0078] S4: finally H 2 PtCl 6 / Ti 4 o 7 Th...

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Abstract

The invention discloses a CCM for a fuel cell membrane electrode and a production method of the CCM, and relates to the technical field of the fuel cell membrane electrode CCM. An anode catalyst adopted by the CCM is Pt / Ti4O7, Pt is an active component, Ti4O7 is a carrier, the mass fraction of Pt is 60%, a cathode catalyst adopted by the CCM is Pt6Co1Mn1 / GC, and the mass fraction of platinum, cobalt and manganese is 60%. According to the anode catalyst Pt / Ti4O7, the loss rate of the active area of precious metal is reduced, and the high-potential corrosion resistance of the carrier is improved; according to the cathode catalyst disclosed by the invention, the catalytic activity on oxygen reduction reaction is improved, and the specific mass activity loss rate of a platinum alloy catalyst is reduced to a certain extent; alloy elements are introduced into Pt, so that the catalytic activity on oxygen reduction reaction is improved.

Description

technical field [0001] The invention relates to the technical field of CCM for fuel cell membrane electrodes, in particular to a CCM for fuel cell membrane electrodes and a production method thereof. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. It has the advantages of high efficiency, no pollution, light weight, etc., and has great development potential and application prospects. Among them, the proton exchange membrane fuel cell can work at low temperature and has high power density, which is very attractive in application. The membrane electrode is responsible for the multi-phase material transmission in the fuel cell, and is responsible for converting the chemical energy of the fuel into electrical energy through electrochemical reactions, which is equivalent to a computer chip. Among them, CCM (catalyst-coated membrane) is the core part of the membrane electrode, and the electrochemical...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/921H01M4/925H01M4/88Y02E60/50
Inventor 俞庆阳张楠陆娇娇侯美秀王朝云秦森杰胡伟伟赵春杰
Owner 安徽明天新能源科技有限公司
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