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Preparation method and application of compound positive pole of microbial fuel cell

A composite anode and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limiting microbial fuel cell technology, high cost of raw materials, and low output power.

Inactive Publication Date: 2012-12-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, microbial fuel cells still have key problems such as low output power and high raw material costs. The anode is still a limiting factor for the performance improvement of microbial fuel cells, which in turn limits the development of microbial fuel cell technology to practical engineering applications.

Method used

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  • Preparation method and application of compound positive pole of microbial fuel cell
  • Preparation method and application of compound positive pole of microbial fuel cell
  • Preparation method and application of compound positive pole of microbial fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing a microbial fuel cell composite anode, the steps are as follows:

[0025] 1) Combine 902.5mg activated carbon powder with 47.5mg Fe 3 o 4 Mix evenly to obtain a mixed material;

[0026] 2) Add 25 mL of absolute ethanol (20 mg in mass) to the above mixture and disperse evenly, heat the ethanol in a water bath to slightly boil, then add 35 microliters of 60% polytetrafluoroethylene aqueous solution (polytetrafluoroethylene) drop by drop. The quality of tetrafluoroethylene is 50 mg) to break the emulsion, stir the reactant into a ball, and then roll it into a film;

[0027] 3) Cover the surface of the above-mentioned roll-pressed film-forming material with a layer of stainless steel mesh as the current collector and carrier, roll-form it, and cut it into a certain shape according to the need to make a composite anode.

[0028] The composite anode prepared by the above method and the air cathode coated with Pt / C constitute a single-chamber microbia...

Embodiment 2

[0031] A method for preparing a microbial fuel cell composite anode, the steps are as follows:

[0032] 1) Combine 902.5 mg activated carbon powder with 47.5 mg α-FeOOHFe 3 o 4 Mix evenly to obtain a mixed material;

[0033] 2) Add 25 mL of absolute ethanol (20 mg in mass) to the above mixture and disperse evenly, heat the ethanol in a water bath to slightly boil, then add 35 microliters of 60% polytetrafluoroethylene aqueous solution (polytetrafluoroethylene) drop by drop. The quality of tetrafluoroethylene is 50 mg) to break the emulsion, stir the reactant into a ball, and then roll it into a film;

[0034] 3) Cover the surface of the above-mentioned roll-pressed film-forming material with a layer of stainless steel mesh as the current collector and carrier, roll-form it, and cut it into a certain shape according to the need to make a composite anode.

[0035] The composite anode prepared by the above method and the air cathode coated with Pt / C constitute a single-chamber...

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Abstract

The invention provides a preparation method of a compound positive pole of a microbial fuel cell. The preparation method comprises the following steps of: uniformly mixing active carbon powder with an iron (III) oxide; adding and uniformly dispersing absolute ethyl alcohol in the mixture; heating the mixture in a water bath to slightly boil the alcohol; then dropwise adding a polytetrafluoroethylene water solution to carry out demulsification on the mixture; rolling reactants into a film and covering one layer of a stainless steel net on the reactants; rolling and molding the reactants; and cutting the reactants in a certain shape according to requirements to obtain the compound positive pole which is applied to the microbial fuel cell. The preparation method of the compound positive pole of the microbial fuel cell disclosed by the invention has the advantages that the compound positive pole takes the active carbon powder as a raw material and the iron (III) oxide as an auxiliary additive, and is constructed by a polytetrafluoroethylene bonding agent to improve the electric generation performance of the microbial fuel cell, so that the transferring speed of extracellular electrons is enhanced, the dynamics activity of positive pole microorganisms is improved and the electrochemical performance and the output power of the microbial fuel cell are improved; the preparation method has the advantages of simple process and low raw material cost; and the mechanical strength of the prepared compound positive pole is high, and thus the compound positive pole is suitable for engineering application of the microbial fuel cell.

Description

Technical field [0001] The invention relates to the field of microbial fuel cells, in particular to a preparation method and application of a microbial fuel cell composite anode. Background technique [0002] British scientist Pottor observed that microorganisms can generate electricity in 1911. This discovery laid the foundation for the study of microbial fuel cells (Microbial Fuel Cell, MFC) used in the late 20th century to treat wastewater and generate electricity at the same time. Microbial fuel cells are unique in their technology Features - Thorough treatment of pollutants, no need for external energy supply, and the ability to recycle electric energy, etc., have gradually received attention in the field of scientific research to solve energy and environmental problems and establish a conservation-oriented and recycling-oriented society. Microbial fuel cells use microorganisms as biocatalysts and organic or inorganic substances as substrates. Under the catalysis of mic...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/62
CPCY02E60/12Y02E60/50Y02E60/10
Inventor 于宏兵彭新红王鑫
Owner NANKAI UNIV
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