Preparation method of composite anode of microbial fuel cell with carbon-base material modified by conductive complex

A technology of fuel cells and carbon-based materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low electricity production efficiency, achieve the effects of improving electricity production performance, saving manufacturing costs, and reducing battery internal resistance

Inactive Publication Date: 2012-11-14
QINGDAO UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a poly-3,4-ethylenedioxythiophene/multi-walled carbon nanotube conductive composite modified carbon-

Method used

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  • Preparation method of composite anode of microbial fuel cell with carbon-base material modified by conductive complex
  • Preparation method of composite anode of microbial fuel cell with carbon-base material modified by conductive complex
  • Preparation method of composite anode of microbial fuel cell with carbon-base material modified by conductive complex

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Embodiment 1

[0023] The first step, the purification of multi-walled carbon nanotubes: put the multi-walled carbon nanotubes with a diameter of 8~15nm and a length of 30~60μm in a beaker, add a mixed acid solution (V[concentrated H 2 SO 4 ]:V[HNO 3 ]=3:1), at 30°C, 40~80Hz ultrasonic for 6 hours, forming carbon nanotube acid solution, washed with deionized water until neutral, vacuum filtered, then washed 6 times with absolute ethanol, and then continued to repeat the ultrasonic Wash 5 times (5 min / time), vacuum filter until the filtrate is transparent and colorless, and dry the purified carbon nanotubes in vacuum;

[0024] In the second step, put the purified multi-walled carbon nanotubes into 0.1~0.5mol / L sodium sulfate aqueous solution, the content of multi-walled carbon nanotubes is 5%~20%, ultrasonic 30min, so that the carbon nanotubes are dispersed in the solution ; Add 3,4-ethylenedioxythiophene monomer to it at a concentration of 0.01mol / L, and ultrasonicate for 5 hours to prepar...

Embodiment 2

[0030] The anode compartment of the microbial fuel cell is a cylindrical plexiglass anaerobic fluidized bed reactor (see image 3 , image 3 Among them, 1 represents the liquid storage tank, 2 represents the anaerobic fluidized bed body, 3 represents the anode, 4 represents the peristaltic pump, 5 represents the air cathode, and 6 represents the resistance box), with a diameter of 40 mm and a height of 600 mm. The perforated plate liquid distributor has a porosity of 20% and a pore diameter of 2 mm. The anode chamber is filled with coconut shell activated carbon, the particle size dp is 0.45-0.9mm, and the porosity ε=0.45. The modified anodes before modification and 24 circles of polymerization are put into the anode chamber to conduct electrons, and the effective volume of the anode chamber is 1L. The content of loaded platinum is 0.35mg m -2 The carbon cloth is used as the cathode with a diameter of 20 mm, and the oxygen in the air is used as the electron acceptor. The sewa...

Embodiment 3

[0034] The first step, the purification of multi-walled carbon nanotubes: put the multi-walled carbon nanotubes with a diameter of 8~15nm and a length of 30~60μm in a beaker, add a mixed acid solution (V[concentrated H 2 SO 4 ]:V[HNO 3 ]=3:1), at 60°C, 40~80Hz ultrasonic for 8 hours, forming carbon nanotube acid solution, washed with deionized water until neutral, vacuum filtered, then washed with absolute ethanol for 5 times, and then continued to repeat the ultrasonic Wash 3 times (5 min / time), vacuum filter until the filtrate is transparent and colorless, and dry the purified carbon nanotubes in vacuum;

[0035] In the second step, put the purified multi-walled carbon nanotubes into 0.1~0.5mol / L sodium sulfate aqueous solution, the content of multi-walled carbon nanotubes is 5%~20%, and ultrasonically disperse the carbon nanotubes in the solution for 20 minutes ; Add 3,4-ethylenedioxythiophene monomer to it at a concentration of 0.02 mol / L, and ultrasonicate for 6 hours t...

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Abstract

The invention relates to a preparation method of a composite anode of a microbial fuel cell with a carbon-base material modified by a conductive complex. The preparation method comprises purifying a multi-wall carbon nanotube; placing the purified multi-wall carbon nanotube into a 0.1 to 0.5mol/L supporting electrolyte solution, and dispersing the carbon nanotube in the solution, with 5% to 20% of carbon nanotube; adding 3,4-ethylenedioxythiophene monometers into the solution to obtain a well-dispersed 3,4-ethylenedioxythiophene/multi-wall carbon nanotube suspending solution; electrically depositing a complex on the anode surface by cyclic voltammetry; and carrying out vacuum drying, washing with deionized water, and room-temperature airing in sequence to obtain the modified anode. The method provided by the invention can reduce use amount of toxic reactants and shorten the preparation process so as to save the preparation cost. The modified anode has the advantages of peculiar surface effect, good conductivity and electrochemical activity, is remarkably improved in the maximum power density and open-circuit voltage in comparison with the unmodified anode when used in a battery, and can greatly reduce the battery internal resistance.

Description

Technical field: [0001] The invention relates to a preparation method of a conductive composite modified carbon-based material microbial fuel cell composite anode, which belongs to the technical field of microbial fuel cells in new energy and environmental engineering. Background technique: [0002] At present, the global energy crisis and water pollution problems are intensifying, and the research on the development and utilization of biomass new energy has attracted much attention. Biomass pyrolysis production capacity, biological methane production, biological hydrogen production and microbial power generation have become important strategies for the development and utilization of new energy in various countries in the new century. Among these technologies, microbial fuel cell technology is considered to be one of the most promising new technologies for efficiently developing biomass energy due to its unique energy production method. [0003] Microbial fuel cell is a new...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 王许云刘兴倩郭庆杰岳学海白立俊
Owner QINGDAO UNIV OF SCI & TECH
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