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A kind of preparation method of direct methanol fuel cell anode

A methanol fuel cell and anode technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as unfavorable fuel cell power generation, mass transfer obstacles, etc., and achieve the effects of huge conductivity, improved anti-toxicity, and high catalytic activity.

Inactive Publication Date: 2016-08-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no carbon paper between the anode catalyst and the proton exchange membrane, methanol can only enter the catalytic layer through the outer carbon paper of the anode catalyst, and the carbon paper is CO 2 Channels that exit the catalytic layer outwards, resulting in methanol and CO 2 The mutual obstruction of mass transfer is not conducive to fuel cell power generation

Method used

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  • A kind of preparation method of direct methanol fuel cell anode
  • A kind of preparation method of direct methanol fuel cell anode
  • A kind of preparation method of direct methanol fuel cell anode

Examples

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preparation example Construction

[0043] A method for preparing an anode catalyst for a direct methanol fuel cell, specifically comprising the steps of:

[0044] (1) Take resorcinol, formaldehyde and sodium carbonate and add them to deionized water, and mix them uniformly to form a solution; wherein, the molar ratio of resorcinol and formaldehyde is 1:0.5, and the molar ratio of resorcinol and sodium carbonate 1:0.01, the molar ratio of resorcinol and water is 1:100;

[0045] Let the solution stand at 20°C. When the solution tends to gel (lower fluidity), add the solution dropwise to the oil phase containing surfactant while stirring, and form an emulsion after stirring; Seal and stand at 85°C for 1 to 3 days, then filter out the product gel, freeze-dry the gel, and exchange the water in the gel mesh with acetone to obtain RF airgel; 2 Put it in a tube furnace under protection, and carbonize at 600°C and 1100°C for 2 hours respectively to obtain spherical carbon aerogels;

[0046] Wherein, the oil phase is r...

Embodiment 1

[0060] Example 1: Hydrophilic treatment of carbon paper

[0061] The commercially available carbon paper was treated with 98wt% concentrated sulfuric acid at 80°C for one hour and then washed, then treated with 30wt% sodium hydroxide concentrated alkali at 80°C for one hour, washed and dried to obtain hydrophilic carbon paper.

Embodiment 2

[0062] Example 2: Preparation of Spherical Carbon Airgel

[0063] According to the molar ratio of the reaction monomer, resorcinol: formaldehyde = 1:0.5, resorcinol / sodium carbonate = 1:0.01, resorcinol / water = 1:100, add deionized water to adjust the value of the solution Concentration, after mixing evenly, a solution is formed to form a water phase, and when it is left to stand at 20°C until gelation tends to appear (fluidity decreases), the solution is added dropwise to toluene (oil phase) containing a surfactant while stirring, The mass ratio of the oil phase and the water phase is 6:4, stirred to form an emulsion. The surfactant is a mixture of sorbitan fatty acid ester (Span) and n-butanol (mass ratio: 1:1); it is sealed and allowed to stand at 40°C for 3 days, the product is filtered out, and the gel is thoroughly exchanged with acetone after freeze-drying. Glue the water in the mesh to get RF airgel. RF airgel in flowing N 2 Carbonize in a tube furnace under protect...

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Abstract

The invention relates to the preparation field of direct methanol fuel cells and provides a preparation method of an anode of the direct methanol fuel cell. The preparation method of the direct methanol fuel cell comprises the steps of preparing spherical carbon aerogel and a promoter-containing carbon aerogel platinum loaded catalyst and preparing the anode by the promoter-containing carbon aerogel platinum loaded catalyst. The prepared anode catalyst improves the capability of the supported catalytic center of the catalyst carrier per unit area, so that the high catalytic activity is achieved, the effect of dissociating CO adsorbed on platinum is strengthened, and the anti-poisoning property of the catalyst is further improved. According to the prepared anode structure, the internal resistance of the DMFC (direct methanol fuel cell) can be greatly reduced and the output power density is improved.

Description

technical field [0001] The invention relates to the field of direct methanol fuel cell preparation, in particular to a method for preparing an anode of a direct methanol fuel cell. Background technique [0002] Direct methanol fuel cell belongs to proton exchange membrane fuel cell (PEMFC), which directly uses methanol aqueous solution or steam methanol as fuel supply source, instead of hydrogen production through methanol, gasoline and natural gas reforming for power generation. Compared with hydrogen-oxygen proton exchange membrane fuel cells, direct methanol fuel cells (DMFC) have the characteristics of low-temperature rapid start-up, clean and environmentally friendly fuel, and simple battery structure. This makes DMFC may be widely used in future portable electronic products. For DMFC, the fuel does not have the problem of storage and transportation difficulties, but the reaction activity is low and the catalyst is easily poisoned, resulting in low battery performance....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCH01M4/8825H01M4/9075Y02E60/50
Inventor 刘宾虹李洲鹏
Owner ZHEJIANG UNIV