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Direct alcohol fuel cell membrane electrode, and preparation and applications thereof

A fuel cell and membrane electrode technology, which is applied to fuel cells, battery electrodes, solid electrolyte fuel cells, etc., can solve the problems of poor stability, complicated preparation process, and high resistance of alcohol-resistant membrane membrane, and achieves low cost and simple and easy preparation method. The effect of mature production method and production method

Active Publication Date: 2014-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alcohol barrier film prepared by the above method still cannot solve the problems of high film resistance, poor stability and complicated preparation process at the same time.

Method used

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  • Direct alcohol fuel cell membrane electrode, and preparation and applications thereof
  • Direct alcohol fuel cell membrane electrode, and preparation and applications thereof
  • Direct alcohol fuel cell membrane electrode, and preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment is a membrane electrode prepared by adding a graphene oxide layer between the anode side of the Nafion membrane and the anode catalyst layer on the basis of the traditional membrane electrode.

[0036] Preparation of anode diffusion layer: Commercial Toray carbon paper impregnated with 15% PTFE, commercial Vulcan XC-72 carbon powder mixed with 10% Nafion was loaded on carbon paper by scraping method, and the load was 1 mg cm -2 .

[0037] Preparation of cathode with GDE structure: commercial Toray carbon paper impregnated with 15% PTFE, commercial VulcanXC-72 carbon powder mixed with 10% PTFE was loaded on carbon paper by scraping method, and the load was 1 mg cm -2 ; Commodity JM 60% Pt / C catalyst mixed with 10% Nafion was loaded on the diffusion layer by knife coating method, and the load was 2 mg cm -2 .

[0038] The preparation of the anode catalyst layer of CCM structure specifically comprises the following steps:

[0039] 1) Preparation of graph...

Embodiment 2

[0045] The preparation of the anode catalyst layer of the CCM structure described in this example is based on Example 1, spraying Nafion emulsion on the surface of the graphene oxide layer.

[0046] Preparation of anode diffusion layer: same as Example 1;

[0047] The preparation of the negative electrode of GDE structure: with embodiment 1;

[0048] The preparation of the anode catalyst layer of CCM structure comprises the following steps:

[0049] 1) Preparation of graphene oxide slurry: same as Example 1;

[0050] 2) Preparation of graphene oxide layer: spray Nafion solution with a mass concentration of 5% on the surface of the Nafion115-graphene oxide layer prepared in step 2) of the above-mentioned embodiment 1, so that the Nafion load is 0.01 mg / cm 2 , to get Nafion115-graphene oxide layer-Nafion layer, marked as (NGO-Nfn sample).

[0051] 3) Preparation of anode catalyst layer with CCM structure: same as Example 1;

[0052] 4) Preparation of membrane electrodes and ...

Embodiment 3

[0054] The preparation of the anode catalytic layer of the CCM structure described in the present embodiment is on the basis of embodiment 2, to the Nafion115-graphene oxide layer-Nafion layer that makes NaBH 4 Prepared by dipping in aqueous solution.

[0055] Preparation of anode diffusion layer: same as Example 1;

[0056] The preparation of the negative electrode of GDE structure: with embodiment 1;

[0057] The preparation of the anode catalyst layer of CCM structure comprises the following steps:

[0058] 1) Preparation of graphene oxide slurry: same as Example 1;

[0059] 2) Preparation of graphene oxide layer: For the Nafion115-graphene oxide layer-Nafion layer prepared in step 2) of the above-mentioned embodiment 2, in 0.5mg mL -1 Concentration of NaBH 4 Immersion treatment was carried out for 0.5h in , marked as (RGO-Nfn sample);

[0060] 3) Preparation of anode catalyst layer with CCM structure: same as Example 1;

[0061] 4) Preparation of membrane electrodes ...

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Abstract

The invention relates to a direct alcohol fuel cell membrane electrode, and a preparation thereof. According to the preparation method, the direct alcohol fuel cell membrane electrode is formed by arranging an oxidized graphene layer between anode side of a proton exchange membrane and an anode catalyst layer; the oxidized graphene layer is composed of oxidized grapheme and Nafion at a mass ratio of 5:1-1:5. The direct alcohol fuel cell membrane electrode is capable of preventing methanol penetration without cell performance degradation effectively; and the preparation method is simple and convenient, and can be used for batch production.

Description

technical field [0001] The invention relates to a direct alcohol fuel cell membrane electrode. [0002] The invention also relates to a method for preparing the membrane electrode of the direct alcohol fuel cell. Background technique [0003] Direct Alcohol Fuel Cell (DAFC) has been paid close attention by research institutes of various countries in recent years due to its high efficiency and environmental friendliness. Among them, the direct methanol fuel cell using methanol as fuel has been more in-depth research because of its small size and high safety. Its core component, the membrane electrode (MEA) assembly, is usually composed of a gas diffusion layer, a catalytic layer, and a proton exchange membrane. The proton exchange membrane plays a dual role in separating the cathode and anode chambers and conducting protons in the membrane electrode, and its performance directly affects the performance and stability of the fuel cell. [0004] However, in the direct alcohol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/10
CPCY02E60/521H01M4/8657H01M4/8896H01M8/1004H01M8/1013H01M2008/1095Y02E60/50Y02P70/50
Inventor 孙公权夏章讯王素力姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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