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Anode for microbial fuel cell, preparation method of anode and microbial fuel cell

A fuel cell and microbial technology, applied in biochemical fuel cells, battery electrodes, circuits, etc., can solve the problems of poor conductivity of molybdenum disulfide and small specific surface area of ​​the anode

Active Publication Date: 2021-10-29
XINXIANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also MoS in the field of MFCs 2 Anode research reports, for example, the Chinese invention patent application with the application publication number CN110729487A discloses a microbial fuel cell based on a molybdenum disulfide composite material as an anode. The anode used in the microbial fuel cell is molybdenum disulfide / carbon cloth or conductive Polymer / molybdenum disulfide / carbon cloth, molybdenum disulfide / carbon cloth anode is formed by arranging carbon in a solution containing thiourea, sodium molybdate, P123 and deionized water for hydrothermal reaction, washing and drying, but Molybdenum disulfide itself has poor conductivity, and the conductivity of the anode is improved by compounding a conductive polymer on the molybdenum disulfide / carbon cloth anode, but the specific surface area of ​​the anode after compounding the conductive polymer is still small, which is difficult for microorganisms to attach and grow provide enough space

Method used

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  • Anode for microbial fuel cell, preparation method of anode and microbial fuel cell
  • Anode for microbial fuel cell, preparation method of anode and microbial fuel cell
  • Anode for microbial fuel cell, preparation method of anode and microbial fuel cell

Examples

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Embodiment 1

[0038]The anode for the microbial fuel cell of the present embodiment comprises carbon paper and a modification material attached to both sides of the carbon paper, the modification material includes molybdenum disulfide nanosheets and multi-walled carbon nanotubes dispersed between the molybdenum disulfide nanosheets; the modification material The adhesion on carbon paper is 1.5mg cm -2 The modified material is bonded on the carbon paper by nafion; the mass ratio of the modified material and nafion is 3:1; the modified material adopted is prepared by a method comprising the following steps:

[0039] Add 0.3506g of ammonium molybdate and 0.7635g of thiourea into 15mL of deionized water, ultrasonically dissolve for 10 minutes, then add 1g of multi-walled carbon nanotube aqueous dispersion (containing 0.1g of multi-walled carbon nanotubes) to continue ultrasonic dispersion for 30 minutes, and then Put the reaction system into a hydrothermal kettle for 8 hours at 200°C for hydrot...

Embodiment 2

[0042] The preparation method of the microbial fuel cell anode of the present embodiment is the preparation method of the microbial fuel cell anode of embodiment 1, comprising the following steps:

[0043] 1) Add 0.3506g of ammonium molybdate and 0.7635g of thiourea into 15mL of deionized water, ultrasonically dissolve for 10 minutes, then add 1g of multi-walled carbon nanotube aqueous dispersion (containing 0.1g of multi-walled carbon nanotubes) to continue ultrasonic dispersion for 30 Minutes, then put the reaction system into a hydrothermal kettle for hydrothermal reaction at 200°C for 8 hours, then collect the precipitated product, first wash the collected precipitated product three times with deionized water, then three times with absolute ethanol, and finally in the air Place it to dry to obtain the modification material;

[0044] 2) Mix the 5wt% nafion solution and dehydrated ethanol to obtain a mixed solution; the volume of dehydrated ethanol used for every 200mg of 5w...

Embodiment 3

[0047] The microbial fuel cell of the present embodiment is a dual-chamber microbial fuel cell, with the anode for the microbial fuel cell in Example 1 as the anode, the carbon paper as the cathode, and the Nafion 117 proton exchange membrane as the separation membrane; the anaerobic sludge For the mixed bacterial source, use the mixed solution as the anode nutrient solution; use 50mmol L -1 Potassium ferricyanide solution is the cathode solution. As a mixed solution of anode nutrient solution, it is 50mmolL per liter -1 Phosphate buffered saline solution (PBS buffer solution) was mixed with 1g sodium acetate, 12.5mL vitamin solution and 12.5mL mineral solution; 50mmolL -1 See Table 1-3 for the solutes and concentrations of the solutes in the phosphate buffer solution, the solutes and the concentrations of the solutes in the mineral solution, and the solutes and the concentrations of the solutes in the vitamin solution.

[0048] Table 1 50mmol L -1 Solute and concentration ...

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Abstract

The invention relates to an anode for a microbial fuel cell, a preparation method of the anode and the microbial fuel cell, and belongs to the technical field of microbial fuel cells. The anode for the microbial fuel cell comprises an electrode material and a modification material attached to the surface of the electrode material, the modification material comprises molybdenum disulfide nanosheets and carbon nanotubes dispersed among the molybdenum disulfide nanosheets. According to the anode for the microbial fuel cell, the modification material attached to the surface of the electrode material disperses the carbon nanotubes with good conductivity among the molybdenum disulfide nanosheets, so that the conductivity of the modification material can be remarkably enhanced, and the electroactive surface area of the anode can be increased; more sites and spaces are provided for attachment and growth of microorganisms, so that a compact biological membrane can be formed on the surface of the anode, the starting time of the microbial fuel cell is shortened, and the maximum output voltage and the maximum output power density of the microbial fuel cell are increased.

Description

technical field [0001] The invention relates to an anode for a microbial fuel cell, a preparation method thereof, and a microbial fuel cell, which belong to the microbial fuel cell. Background technique [0002] Microbial fuel cells (MFCs) is a promising clean energy technology, but low output power density is still a bottleneck hindering its practical application. The composition and structure of the anode is considered to be a key factor affecting the power output of MFCs cells. Traditional carbon-based materials such as carbon felt (CF) and carbon paper (CP) are widely used due to their good biocompatibility, electrical conductivity, chemical stability, and low cost. However, the relatively limited surface area and electrocatalytic activity of these materials are not conducive to the attached growth of microorganisms and extracellular electron transfer. In order to improve the power output of MFCs, designing and preparing nanomaterial-modified carbon electrodes with exc...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M8/16
CPCH01M4/9083H01M4/90H01M8/16H01M2004/8684Y02E60/50
Inventor 郭伟倪天军李晓甜崔亮李向荣张慧李雨菲
Owner XINXIANG MEDICAL UNIV
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