Cathode of film-free air microbial fuel cell and manufacturing method thereof

A fuel cell cathode and air microorganism technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problem of limiting the practical application of single-chamber air cathode microbial fuel cells, increasing the cost and process complexity of the battery, and the poor power generation performance of the battery. High problems, to achieve the effect of being conducive to long-term operation, superior waterproof effect, and easy to realize industrialization

Inactive Publication Date: 2012-01-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most single-chamber air-cathode microbial fuel cell cathodes use noble metals represented by platinum as catalysts. This type of catalyst has the characteristics of high electrochemical activity and high electricity generation performance, but its high price limits the application of single-chamber air-cathode microbial fuel cells. practical application
And ordinary catalysts such as carbon black, carbon nanotubes, etc., the battery's power generation performance is not high
On the other hand, the diffusion layer of traditional single-chamber air cathode microbial fuel cells uses polytetrafluoroethylene (PTFE) or polydimethylsiloxane (PDMS), which are relatively expensive and complicated to operate, which greatly increases Reduced battery manufacturing cost and process complexity

Method used

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  • Cathode of film-free air microbial fuel cell and manufacturing method thereof
  • Cathode of film-free air microbial fuel cell and manufacturing method thereof
  • Cathode of film-free air microbial fuel cell and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the cathode is composed of diffusion layer c, stainless steel mesh b and catalytic layer a. Prepare the cathode according to the following steps: (1) Cut a stainless steel mesh with a mesh number of 100, length × width = 5.5 cm × 4.5 cm, and reserve a length of 3 cm for connecting to an external circuit, and use absolute ethanol to sonicate before use 30 minutes. (2) Mix the conductive carbon black and polymethylphenylmethylsilane at a mass ratio of 3:10, spread it evenly on the stainless steel mesh, and dry it at room temperature for half an hour. (3) The synthesis method of the manganese dioxide catalyst supported by carbon nanotubes is as follows. Mix potassium permanganate solution with a concentration of 0.1 mol / L and carbon nanotubes with a length of 5 to 15 um at 100 mL: 400 mg, adjust The pH value of the solution is equal to 1.0, the temperature is controlled at 60° C. and heated for 7 hours, then filtered under reduced pressure...

Embodiment 2

[0036]Example 2 Prepare the cathode according to the following steps: (1) Cut a stainless steel mesh with a mesh number of 150, length × width = 5.5 cm × 4.5 cm, and reserve a length of 3 cm for connecting an external circuit. Hydro-ethanol sonication for 30 minutes. (2) Mix conductive carbon black and polymethylphenylmethylsilane at a mass ratio of 3: 11, spread evenly on the stainless steel mesh, and dry at room temperature for half an hour. (3) The synthesis method of the manganese dioxide catalyst supported by carbon nanotubes is as follows, the potassium permanganate solution with a concentration of 0.075 moL / L is mixed with carbon nanotubes with a length of 5-15 um according to 100 mL: 550 mg , adjust the pH value of the solution to be equal to 1.5, control the temperature at 65°C and heat for 7 hours, then filter under reduced pressure, wash, and then dry the washed filter cake at a temperature of 110°C to prepare a carbon nanotube-loaded manganese dioxide catalyst . ...

Embodiment 3

[0039] Example 2 Prepare the cathode according to the following steps: (1) Cut a stainless steel mesh with a mesh number of 200, length × width = 5.5 cm × 4.5 cm, and reserve a length of 3 cm for connecting to an external circuit. Hydro-ethanol sonication for 30 minutes. (2) Mix conductive carbon black and polymethylphenylmethylsilane at a mass ratio of 3:13, spread evenly on the stainless steel mesh, and dry at room temperature for half an hour. (3) The synthesis method of the manganese dioxide catalyst supported by carbon nanotubes is as follows, the potassium permanganate solution with a concentration of 0.045 moL / L is mixed with carbon nanotubes with a length of 5-15 um according to 100 mL: 700 mg , adjust the pH value of the solution to be equal to 1.5, control the temperature at 70°C and heat for 5 hours, then filter under reduced pressure, wash, and then dry the washed filter cake at a temperature of 120°C to prepare a carbon nanotube-loaded manganese dioxide catalys...

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Abstract

The invention discloses a cathode of a film-free air microbial fuel cell and a manufacturing method thereof. The manufacturing method comprises the following steps: mixing conductive black with poly methyl phenmethyl siloxane serving as a diffusion layer material of a cathode in a mass ratio of 3: (10-13), evenly coating the mixture on one surface of a stainless steel mesh serving as a carrier of the cathode material, and drying for one hour; mixing a cell cathode catalyst with 5% of naphthol solution by based on a proportion of 1mg:(2-8)uL, processing with ultrasound for 30 minutes, evenly coating on the other surface of the stainless steel mesh, and drying for one hour; and cutting rubber into a gasket with the same size as a cell box cathode pressing plate, and fixing the rubber gasket with the cathode pressing plate to obtain the cathode. Through the invention, the manufactured cell cathode is simple in structure, low in cost and easy to realize industrialization, can be used for manufacturing the microbial fuel cell with high performance and low cost, and can acquire more considerable electric energy effectively in the process of waste water treatment.

Description

technical field [0001] The invention relates to the field of microbial fuel cells, in particular to a membrane-free air microbial fuel cell cathode and a preparation method thereof. Background technique [0002] Microbial fuel cells directly convert chemical energy stored in biomass into electrical energy by using electrogenic bacteria as catalysts. Compared with traditional fuel cells, microbial fuel cells are not limited by the Carnot heat engine cycle, and have the characteristics of high energy conversion efficiency and zero pollution, and also have new features, such as a wide range of fuel sources and mild reaction conditions. At the same time, microbial fuel cells have great potential in sewage treatment, using pollutants as fuel for bacterial metabolism in microbial fuel cells and obtaining electrical energy. Not only saves the operating cost of sewage treatment, but also can get electricity from it. [0003] The air cathode microbial fuel cell directly exposes th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86
CPCY02E60/50
Inventor 冯春华陈炎丰许建明彭东庆吕志盛韦朝海
Owner SOUTH CHINA UNIV OF TECH
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