Method for preparing direct methanol fuel cell membrane electrode

A methanol fuel cell and membrane electrode technology, which is applied to fuel cells, battery electrodes, fuel cell components, etc., can solve problems such as hindering methanol and air product transport, reducing the porosity of the support layer, and reducing the utilization rate of catalysts. Improve mass transfer resistance, reduce mass transfer resistance, improve the effect of interface

Inactive Publication Date: 2008-10-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the pores of the support layer are blocked, causing the porosity of the support layer to decrease, hindering the t

Method used

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  • Method for preparing direct methanol fuel cell membrane electrode
  • Method for preparing direct methanol fuel cell membrane electrode
  • Method for preparing direct methanol fuel cell membrane electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Membrane preparation and pretreatment. The Nafion membrane is Nafion115 produced by Du Pont Company of the United States, and the ion form is proton type. The membrane needs to be pretreated before use: a Nafion membrane of a certain size in a volume ratio of 5% H 2 o 2 Treat in aqueous solution at 80°C for 1 hour to remove organic matter on the surface of the membrane, then place it in double distilled water at 80°C for 1 hour to wash the hydrogen peroxide on the surface of the membrane, and then use 0.5mol L at 80°C -1 h 2 SO 4 Inorganic metal ions were treated with an aqueous solution, and then placed in double distilled water at 80 °C for 1 hour to wash the H on the surface of the membrane. 2 SO 4 , the treated Nafion membrane was placed in double distilled water for later use.

[0029] 2. Preparation of catalyst slurry and preparation of cathode and anode catalyst layers. The anode and cathode were respectively selected PtRu black catalyst and Pt Black c...

Embodiment 2

[0035] 1. Membrane preparation and pretreatment. The Nafion membrane is Nafion115 produced by Du Pont Company of the United States, and the ion form is proton type. The membrane needs to be pretreated before use: a Nafion membrane of a certain size in a volume ratio of 5% H 2 o 2 Treat in aqueous solution at 80°C for 1 hour to remove organic matter on the surface of the membrane, then place it in double distilled water at 80°C for 1 hour to wash the hydrogen peroxide on the surface of the membrane, and then use 0.5mol L at 80°C -1 h 2 SO 4 Inorganic metal ions were treated with an aqueous solution, and then placed in double distilled water at 80 °C for 1 hour to wash the H on the surface of the membrane. 2 SO 4 , the treated Nafion membrane was placed in double distilled water for later use.

[0036] 2. Preparation of catalyst slurry and preparation of cathode and anode catalyst layers. 20wt% PtRu / C catalyst and 20wt% Pt / C catalyst were selected as raw materials for the...

Embodiment 3

[0042] 1. Membrane preparation and pretreatment. The Nafion membrane is Nafion115 produced by Du Pont Company of the United States, and the ion form is proton type. The membrane needs to be pretreated before use: a Nafion membrane of a certain size in a volume ratio of 5% H 2 o 2 Treat in aqueous solution at 80°C for 1 hour to remove organic matter on the surface of the membrane, then place it in double distilled water at 80°C for 1 hour to wash the hydrogen peroxide on the surface of the membrane, and then use 0.5mol L at 80°C -1 h 2 SO 4 Inorganic metal ions were treated with an aqueous solution, and then placed in double distilled water at 80 °C for 1 hour to wash the H on the surface of the membrane. 2 SO 4 , the treated Nafion membrane was placed in double distilled water for later use.

[0043] 2. Preparation of catalyst slurry and preparation of cathode and anode catalyst layers. 40wt% PtRu / C catalyst and 40wt% Pt / C catalyst were selected as raw materials for the...

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Abstract

The invention discloses a preparation method for a direct methanol fuel cell film electrode, which belongs to field of direct methanol fuel cell. The film electrode employs a proton exchange film as an electrolyte film, a platinum-ruthenium-carbon catalyst as an anode and a platinum-carbon catalyst as a cathode, and is composed of a supporting layer, a micro-pore layer, a catalytic layer, a proton exchange film which are arranged at the anode side and a supporting layer, a micro-pore layer, a catalytic layer which are arranged at the cathode side. The preparation method for the film electrode includes: preparation and pretreatment of the film, preparation of a catalyst paste, preparation of the catalytic layer, preparation of a micro-pore layer paste, preparation of the micro-pore layer and hot pressing process. Advantages of the preparation method are that: the micro-pore layer and the supporting layer prepared by the method have higher porosity, reduce mass transfer resistance of the film electrode, improve interface between the micro-pore layer or the catalytic layer and the supporting layer, thereby increasing three-phase contact area of catalyst and reactant and increasing output power density of the cell.

Description

technical field [0001] The invention relates to a preparation method of a direct methanol fuel cell material, belonging to the technical field of direct methanol fuel cell membrane electrode structure and manufacture. Background technique [0002] Direct methanol fuel cell (DMFC) is a power generation device that directly converts chemical energy stored in fuel (methanol) and oxidant (oxygen or air) into electrical energy. Inexpensive, high energy density, fuel is fed directly when the battery is working, no reforming treatment is required, simple structure, short response time, convenient operation, easy to carry and store, it is an ideal power for portable electronic devices, mobile phones, cameras and electric vehicles source, the application considered most likely to achieve commercialization. The membrane electrode is a layered composite composed of the anode support layer, microporous layer, catalyst layer, Nafion membrane, cathode catalyst layer, microporous layer, a...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M4/88H01M8/1004
CPCY02E60/50Y02P70/50
Inventor 王新东王同涛林才顺苗睿瑛薛方勤方勇叶锋李晶晶王永亮刘芸
Owner UNIV OF SCI & TECH BEIJING
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