Surface modification method of carbon material and application thereof in microbial fuel cell

A surface modification, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effects of high power output, low price, and reduced construction costs

Inactive Publication Date: 2011-10-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the improvement of the oxygen reduction properties of the surface of carbon materials by oxidation modification of strong oxidizing salts and the application of chemically activated carbon materials in the cathode of microbial fuel cells.

Method used

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  • Surface modification method of carbon material and application thereof in microbial fuel cell
  • Surface modification method of carbon material and application thereof in microbial fuel cell
  • Surface modification method of carbon material and application thereof in microbial fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The first step: preparation and characterization of potassium dichromate activated graphite material

[0037] (1) Clean a graphite rod with a diameter of 6 mm and 200 mL of graphite particles with a particle size of 5×4 mm with deionized water and ethanol, and air-dry. Then, at room temperature, soak graphite rods and 150 mL of pretreated graphite particles in 0.1 mol / L potassium dichromate and concentrated sulfuric acid solution with a volume ratio of 2:1 for 5 hours, then rinse with deionized water, and let them dry in the air. Dry.

[0038] (2) Electrochemical tests were carried out on the graphite electrodes before and after activation: the electrochemical tests were carried out on the chemically activated electrodes using the traditional three-electrode system, that is, at room temperature using a Parstat 2273 electrochemical workstation, with 50mM phosphate buffer The solution (PBS) is the electrolyte, the calomel electrode (Hg / HgO electrode) is used as the refer...

Embodiment 2

[0046] The first step: preparation and characterization of potassium permanganate activated graphite material

[0047] (1) Clean a graphite rod with a diameter of 6 mm and 200 mL of graphite particles with a particle size of 5×4 mm with deionized water and ethanol, and air-dry. Put the graphite rod and 150mL pretreated graphite particles in the 0.1mol / L potassium permanganate and concentrated sulfuric acid solution with a volume ratio of 2:1 (single dichromate, permanganate, ferrate can be ) for 5 hours, rinsed with deionized water, and dried.

[0048] (2) Electrochemical tests were performed on the graphite electrodes before and after modification. The electrochemical test shows that the oxygen reduction current of the modified graphite electrode is significantly greater than that of the unactivated electrode in the cyclic voltammetry test, indicating that the oxygen reduction ability of the activated electrode is enhanced.

[0049] Step Two: Microbial Fuel Cells

[0050] ...

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Abstract

The invention discloses a surface modification method of a carbon material and application thereof in a microbial fuel cell. In the preparation method, the carbon material is subjected to surface modification treatment by using strong oxidative metal acid radical salt (such as potassium dichromate and the like), the surface characteristics of the carbon material are changed, and a microbial fuel cell cathode is prepared and applied to the microbial fuel cell. Compared with a noble metal catalyst such as platinum and the like, the strong oxidative metal acid radical salt modified carbon electrode material is low in price and greatly reduces the constructive cost of the microbial fuel cell; and compared with the unmodified carbon electrode, the strong oxidative metal acid radical salt modification can greatly improve the oxygen reduction rate of the cathode, reduce the polarization of the cathode and improve the electricity generation power of the cell. The application of the strong oxidative metal acid radical salt modified carbon electrode remarkably reduces the constructional cost of the microbial fuel cell, and good foundation and path are provided for the commercial application of the microbial fuel cell.

Description

technical field [0001] The invention belongs to the technical field of new energy and environmental engineering, and specifically relates to a method for surface modification of carbon materials and the application of the obtained cathode materials in microbial fuel cells. Background technique [0002] Microbial Fuel Cells (MFCs) is a new type of device that uses microorganisms as catalysts to convert chemical energy in organic matter into electrical energy. It can use almost all organic matter including domestic sewage, industrial wastewater and animal waste, and it can realize the recovery of electric energy and the purification of sewage at the same time. It is considered to be an innovative technology with great application prospects, so it is widely recognized focus on. [0003] At present, the output power of microbial fuel cells is still very low. This is mainly due to the slow oxidation rate of the substrate by microorganisms, the small electron transfer rate, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/96
CPCY02E60/50
Inventor 张乐华李冬梅史海凤柳玥闫莹蔡兰坤
Owner EAST CHINA UNIV OF SCI & TECH
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