CN110867589A - High specific surface area graphene seabed sedimentary layer microbial fuel cell electrode - Google Patents
High specific surface area graphene seabed sedimentary layer microbial fuel cell electrode Download PDFInfo
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- CN110867589A CN110867589A CN201810983913.8A CN201810983913A CN110867589A CN 110867589 A CN110867589 A CN 110867589A CN 201810983913 A CN201810983913 A CN 201810983913A CN 110867589 A CN110867589 A CN 110867589A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/96—Carbon-based electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
A high specific surface area graphene seabed sedimentary layer microbial fuel cell electrode is a conductive fiber loaded with graphene materials, the fiber is hinged through metal wires to form a cylindrical electrode, the metal wires are fixed through a conductive rigid frame to prevent movement caused by ocean current, and the electrode is placed in a seabed sedimentary layer or above a seabed sedimentary layer/seawater interface when in use. The graphene material is introduced into the electrode, so that the graphene composite material has a large specific surface area, and the comprehensive performance of the battery in the real sea environment is remarkably improved.
Description
Technical Field
The invention belongs to the technical field of ocean energy power generation, and relates to an electrode of a microbial cell, which is used for a seabed sedimentary layer.
Background
A Microbial Fuel Cell (MFC) is a device that converts chemical energy in organic or inorganic substances into electrical energy using microorganisms. Microorganisms decompose inorganic or organic substances in an anaerobic environment, i.e. a seabed sediment layer (anode), to release electrons, and the electrons flow through a cathode through an electron transfer medium to form current.
Seabed sediment layer microbial fuel cell electrode (BMFCE), also known as sea mud/seawater microbial fuel cell electrode. The special microbial fuel cell electrode works in a real sea environment, can be placed in a seabed sediment layer, collects electrons released by decomposing inorganic or organic matters by more sediment layer microbes by utilizing the high specific surface area of the special microbial fuel cell electrode, or is placed above a seabed sediment layer/seawater interface, and improves the comprehensive performance of the cell by utilizing the excellent conductivity of the special microbial fuel cell electrode.
The specific surface area of the BMFCE is about 0.1524 m/g at present, the low specific surface area becomes a main factor limiting the electron collecting capacity of the BMFCE, and the specific surface area of the electrode is greatly improved in a mode of coating an electrode fiber material with graphene, so that the performance of the battery is optimized.
With the acceleration of the construction of the ocean forcing country, the marine ecological civilized construction is promoted, the force for protecting the marine ecological environment is increased, and the detection of the ocean is also emphasized more and more. At present, electrodes placed in high-energy lead-acid storage batteries and the like used by the submarine detection device mostly affect the marine environment. Under the strong pressure of the sea bottom, conditions such as battery rupture, electrode bare leakage and electrolyte leakage are likely to occur, and the pollution to the marine environment is caused. Therefore, it is important to develop an environmentally-friendly and long-life battery electrode, and the emergence of BMFCE provides a good choice for the battery, so that people can make zero influence on the marine ecological environment while detecting at the seabed.
At present, carbon felt, carbon paper, carbon fiber and the like are used as electrode materials of the seabed settled layer microbial fuel cell, the carbon materials can be widely applied to BMFCE, and the carbon fiber becomes a main choice of the seabed settled layer microbial fuel cell electrode in consideration of factors such as high conductivity, operability, softness and specific surface area.
In order to ensure that the battery can normally work in a practical environment, the BMFCE loaded with the graphene material is designed and invented to cope with a complex marine environment.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the BMFCE loaded with the graphene material, which has the advantages of stable structure, convenience in operation, controllable fiber quantity, controllable quantity of sticky high-molecular polymer microspheres coated with graphene and seawater scouring resistance.
The technical scheme of the invention is as follows:
a high specific surface area graphene seabed deposited layer microbial fuel cell electrode, which is characterized by comprising: the high-specific-surface-area seabed sediment layer microbial fuel cell electrode is formed by hinging conductive carbon fibers loaded with graphene materials on the surface through metal wires, the specific surface area of the fibers is obviously increased due to the graphene loaded on the surface, the collection of electrons generated by catalyzing and oxidizing organic or inorganic matters by the microbes in the seabed sediment layer is facilitated, and the graphene has excellent conductive performance, so that the performance of the cell is integrally improved. In addition, metal hinge fibers facilitate the containment of more fibers in the limited space of the battery. The adhesive high-molecular polymer microspheres are arranged between the graphene and the conductive carbon fibers, so that the graphene is adhered and fixed, sufficient strength is ensured to resist the scouring of seawater, the service life of the battery is prolonged, and the maintenance and replacement cost of the battery is reduced.
Compared with the prior art, the invention has the beneficial effects that:
the invention is a seabed sediment layer biofuel cell electrode, the specific surface area of the existing fiber is 0.1524 m/g, the specific surface area of the electrode fiber of the invention is 15.2440 m/g, the specific surface area of the electrode is enlarged by more than 100 times, so that the capability of collecting seabed sediment layer electrons is obviously enhanced.
The surface of the fiber is modified and then is bonded with the graphene material through the viscous high-molecular polymer, so that the capability of resisting seawater scouring is effectively improved, and the stability of the battery is improved.
The metal wires are fixed through the conductive rigid frame, so that the overall stability of the battery structure is improved.
The graphene material is uniformly loaded on the surface of the carbon fiber, so that the conductivity of the electrode is effectively improved, and the performance of the battery is optimized.
CV of existing minute fiberArea of the figure envelope is S1=1.157*10-3V·A·m-2The area of the CV diagram of the invention is S2=1.265*10-3V·A·m-2Capacity performance C of existing very small amount of fibres1=3.61*10-1F/m2Very small amount of the capacitive property C of the present invention2=3.95*10-1F/m2The growth is 8.3 percent on a same scale.
Drawings
Fig. 1 is a schematic structural diagram of a high specific surface area graphene seabed sediment layer microbial fuel cell electrode of the invention.
(1) Conductive rigid frame (2) seabed sediment layer biological fuel cell electrode
Fig. 2 is a schematic view of a micro-scale of an electrode of a microbial fuel cell of the present invention.
(1) Adhesive high-molecular polymer microsphere coated by metal wire (2), conductive fiber (3) and graphene
Detailed Description
Due to ocean currents, tides, microbial corrosion, adhesion of marine organisms and the like, greater challenges are provided for the service life of the electrode of the seabed sedimentary layer biofuel cell, such as electrode falling caused by the back-and-forth swing of the traction electrode under the action of the ocean currents and the shaking of the electrodes by the marine organisms. The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present invention in more detail, and the protection scope of the present invention is not limited thereby.
The implementation case is as follows:
example 1, as shown in fig. 1, a schematic view of an electrode framework of a graphene seabed sediment layer microbial fuel cell with a high specific surface area according to the present invention, and fig. 2 is a microscopic schematic view of an electrode of a seabed sediment layer microbial fuel cell. Can be arranged on the seabed sediment layer to be used as a battery anode, and can also be arranged above the seabed sediment layer/seawater interface to be used as a battery cathode. The material selects conductive carbon fiber with diameter of phi 6 mu m and length of 60mm, the metal wire selects titanium wire with diameter of phi 1mm, and the conductive rigid frame adopts conductive rigid fiber with diameter of phi 50 mm. The electrodes are fixed into a cylinder shape through the conductive rigid frame, so that the usable area of the electrodes is increased, and the performance of the battery is improved.
Example 2, as shown in fig. 1, a schematic view of an electrode framework of a graphene seabed sediment layer microbial fuel cell with a high specific surface area according to the present invention, and fig. 2 is a microscopic schematic view of an electrode of a seabed sediment layer microbial fuel cell. Can be arranged on the seabed sediment layer to be used as a battery anode, and can also be arranged above the seabed sediment layer/seawater interface to be used as a battery cathode. The electrode fiber material is metal fiber with diameter of phi 4 μm and length of 60mm, so as to improve conductivity and avoid mutual winding due to ocean current.
Example 2, as shown in fig. 1, a schematic view of an electrode framework of a graphene seabed sediment layer microbial fuel cell with a high specific surface area according to the present invention, and fig. 2 is a microscopic schematic view of an electrode of a seabed sediment layer microbial fuel cell. Can be arranged on the seabed sediment layer to be used as a battery anode, and can also be arranged above the seabed sediment layer/seawater interface to be used as a battery cathode. The material selects metal coating fiber with the diameter of phi 13.5 mu m and the length of 60mm, so that the specific resistance can be reduced, and the battery performance can be improved.
Example 3, as shown in fig. 2, a microscopic schematic view of a high specific surface area graphene seabed sediment layer microbial fuel cell electrode according to the present invention. The diameter of the viscous high-molecular polymer microsphere coated by the graphene is about phi 1mm, so that the number of graphene attachments is greatly increased, the specific surface area is increased, and the battery performance is improved.
Claims (5)
1. A microbial fuel cell electrode for a seabed sedimentary layer beneficial to use in real sea is characterized in that the surface of electrode fiber is covered with a graphene material.
2. The microbial fuel cell electrode of claim 1, wherein the electrode fibers are high conductivity fibers to improve cell performance.
3. The microbial fuel cell electrode of claim 1, wherein a viscous high molecular polymer is used as an adhesive between the surface of the electrode fiber and the graphene material, so as to improve the adhesion and mechanical strength between the graphene and the surface of the fiber.
4. The microbial fuel cell electrode of claim 1, wherein the fibers are uniformly strung with graphene-coated adhesive high polymer microspheres or micro-sheets.
5. The electrode of claim 1, wherein the electrodes are fixed to each other by a conductive rigid frame for resisting movement caused by ocean currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810983913.8A CN110867589A (en) | 2018-08-28 | 2018-08-28 | High specific surface area graphene seabed sedimentary layer microbial fuel cell electrode |
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| CN201810983913.8A CN110867589A (en) | 2018-08-28 | 2018-08-28 | High specific surface area graphene seabed sedimentary layer microbial fuel cell electrode |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199290A (en) * | 2013-03-14 | 2013-07-10 | 江南大学 | Sedimentary type microbial fuel cell capable of strengthening power generation by using sunlight |
| CN104852071A (en) * | 2014-02-18 | 2015-08-19 | 中国海洋大学 | Benthic microbial fuel cell (BMFC) device suitable for actual ocean usage |
| CN104979566A (en) * | 2015-05-18 | 2015-10-14 | 清华大学 | Composite electrode, preparation method and uses thereof |
| US20160326031A1 (en) * | 2014-01-06 | 2016-11-10 | King Abdullah University Of Science And Technology | Anaerobic electrochemical membrane bioreactor and process for wastewater treatment |
| CN106784829A (en) * | 2017-01-10 | 2017-05-31 | 哈尔滨工业大学 | A kind of preparation method for loading Graphene and the anode of microbial fuel cell of ferrous disulfide compound |
-
2018
- 2018-08-28 CN CN201810983913.8A patent/CN110867589A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199290A (en) * | 2013-03-14 | 2013-07-10 | 江南大学 | Sedimentary type microbial fuel cell capable of strengthening power generation by using sunlight |
| US20160326031A1 (en) * | 2014-01-06 | 2016-11-10 | King Abdullah University Of Science And Technology | Anaerobic electrochemical membrane bioreactor and process for wastewater treatment |
| CN104852071A (en) * | 2014-02-18 | 2015-08-19 | 中国海洋大学 | Benthic microbial fuel cell (BMFC) device suitable for actual ocean usage |
| CN104979566A (en) * | 2015-05-18 | 2015-10-14 | 清华大学 | Composite electrode, preparation method and uses thereof |
| CN106784829A (en) * | 2017-01-10 | 2017-05-31 | 哈尔滨工业大学 | A kind of preparation method for loading Graphene and the anode of microbial fuel cell of ferrous disulfide compound |
Non-Patent Citations (1)
| Title |
|---|
| 侯俊先 等: ""石墨烯修饰微生物燃料电池阳极的研究"", 《工程热物理学报》 * |
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