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Anode for microbial fuel cell and preparation method thereof, 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: 2022-07-29
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 and preparation method thereof, and microbial fuel cell
  • Anode for microbial fuel cell and preparation method thereof, and microbial fuel cell
  • Anode for microbial fuel cell and preparation method thereof, and microbial fuel cell

Examples

Experimental program
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Embodiment 1

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

[0039] Add 0.3506g of ammonium molybdate and 0.7635g of thiourea to 15mL of deionized water, dissolve by ultrasonic for 10 minutes, then add 1g of multi-walled carbon nanotube water dispersion (containing 0.1g of multi-walled carbon nanotubes) and continue to ultrasonically disperse for 30 minutes, then The reaction system was placed in a hydrothermal kettle for hydrother...

Embodiment 2

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

[0043] 1) Add 0.3506g of ammonium molybdate and 0.7635g of thiourea into 15mL of deionized water, dissolve by ultrasonic for 10 minutes, and then add 1g of multi-walled carbon nanotube water dispersion (containing 0.1g of multi-walled carbon nanotubes) to continue ultrasonic dispersion for 30 minutes. After that, the reaction system was put into a hydrothermal kettle for hydrothermal reaction at 200 °C for 8 hours, and then the precipitated product was collected. First, the collected precipitated product was washed three times with deionized water, then three times with absolute ethanol, and finally in the air. Place to dry to obtain modified materials;

[0044] 2) to mix the 5wt% nafion solution and absolute ethanol to obtain a mixed solution; the volume of the...

Embodiment 3

[0047] The microbial fuel cell of this embodiment is a dual-chamber microbial fuel cell, and the anode for the microbial fuel cell in Example 1 is used as the anode, the carbon paper is used as the cathode, and the Nafion 117 proton exchange membrane is used as the separation membrane; It is a mixed bacterial source, and the mixed solution is used as the anode nutrient solution; 50 mmol L -1 Potassium ferricyanide solution is the cathodic solution. As a mixed solution of anode nutrient solution, it is 50mmolL per liter -1 The phosphate buffered saline (PBS buffer solution) is obtained by adding 1g sodium acetate, 12.5mL vitamin solution and 12.5mL mineral solution and mixing; 50mmolL -1 The solute and the concentration of each solute in the phosphate buffer, the solute and the concentration of each solute in the mineral solution, and the solute and the concentration of each solute in the vitamin solution are shown in Tables 1-3, respectively.

[0048] Table 1 50mmol L -1 So...

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Abstract

The invention relates to an anode for a microbial fuel cell, a preparation method thereof, and a microbial fuel cell, belonging to the technical field of microbial fuel cells. The anode for a microbial fuel cell of the present invention includes an electrode material and a modified material attached to the surface of the electrode material; the modified material includes molybdenum disulfide nanosheets and carbon nanotubes dispersed between the molybdenum disulfide nanosheets. The modified material attached to the surface of the electrode material in the anode for the microbial fuel cell of the present invention disperses carbon nanotubes with good electrical conductivity among the molybdenum disulfide nanosheets, which can not only significantly enhance the electrical conductivity of the modified material, but also increase the anode The electroactive surface area provides more sites and spaces for the attachment and growth of microorganisms, which is conducive to the formation of dense biofilms on the anode surface, shortens the start-up time of microbial fuel cells, and increases the maximum output voltage and maximum output voltage of microbial fuel cells. output power density.

Description

technical field [0001] The invention relates to an anode for a microbial fuel cell, a preparation method thereof, and a microbial fuel cell, belonging to the microbial fuel cell. Background technique [0002] Microbial fuel cells (MFCs) are a promising clean energy technology, but low output power density is still a bottleneck hindering their practical application. The composition and structure of the anode are considered to be a key factor affecting the output power 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 surface area and electrocatalytic activity of these materials are relatively limited, which is not conducive to the attachment growth and extracellular electron transfer of microorganisms. In order to improve the power output of MFCs, it is an effective method to design and fabricate nanomater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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