CN108767301A - The controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size and preparation method - Google Patents
The controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size and preparation method Download PDFInfo
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- CN108767301A CN108767301A CN201810521633.5A CN201810521633A CN108767301A CN 108767301 A CN108767301 A CN 108767301A CN 201810521633 A CN201810521633 A CN 201810521633A CN 108767301 A CN108767301 A CN 108767301A
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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
The invention discloses a kind of carbonaceous tubular type oxygen reduction cathode microbiological fuel cell that size is controllable and preparation methods；A kind of carbonaceous tubular type oxygen reduction cathode microbiological fuel cell that size is controllable, including cathode and anode, it is characterised in that：The cathode uses the algae pipe after carbonization, includes chlorella pyrenoidosa powder in the algae pipe；The inner surface of the algae pipe is pasted with hole and is less than 1 μm of separation membrane；Cathode outer wall winds titanium silk, and anode is inserted into along algae tube hub axis direction in algae pipe；It is respectively provided with cover board at algae pipe both ends, cover board is bolted；It is provided with electrolyte inlet on a cover board wherein, electrolyte outlet is provided on another cover board；The present invention is functional, and size is controllable, and low energy consumption, and method is simple, easy to operate, at low cost, can be widely used in the fields such as the energy, chemical industry, environmental protection, has a good application prospect.
Description
Technical field
The present invention relates to microbiological fuel cells, more particularly to the controllable carbonaceous tubular type oxygen reduction cathode microorganism combustion of size
Expect battery and preparation method.
Background technology
In recent years, as the development of industrial society, energy crisis and water resource pollution become the two of puzzlement human development
Big main problem, therefore the development and utilization of environmentally friendly regenerative resource has become the important research side in energy research field
One of to.Microbiological fuel cell (Microbial Fuel Cell, MFC) converts skill as a kind of novel microbial energy
Art can produce electricl energy while degradation dirty Organic substance in water, have unique environmental effect and economic benefit, contribute to
The cost for reducing sewage disposal, causes the extensive concern of countries in the world researcher.In recent years, going deep into micro- life with research
The electricity generation performance of object fuel cell is greatly improved, but its higher making operating cost and lower output power are still
It is so the bottleneck factor for limiting its extension application.And important component of the cathode as microbiological fuel cell, it makes
Cost, performance characteristics have vital influence to practical utilize of MFC.Air cathode is made due to the use of the oxygen in air
For the electron acceptor of cathode, system operation cost can be significantly reduced compared to traditional liquid cathode.But conventional catalyst oxygen
The catalyst of reduction reaction is mostly noble metal catalyst, is not appropriate for applying in MFC.The air cathode of carbonaceous hydrogen reduction in recent years
Since the feature of its high-performance, low cost is got growing concern for.The pore structure of air cathode Catalytic Layer and hydrogen reduction
The anticathode performance of catalytic activity has important influence.Therefore, find a kind of low cost, high catalytic activity, pore structure enrich,
The controllable air cathode of size just has a very important significance.
The cathode of microbiological fuel cell can be divided into two kinds of sheet like air cathode and three dimensional pipe type air cathode at present.Sheet
For air cathode mainly with carbon cloth, the structural materials such as metal mesh sheet use Nafion membrane solution or polytetrafluoro as substrate
The binders such as ethylene (PTFE) are made as catalyst binder of modes such as brushing, hot pressing.But it brushes and easily causes catalysis
Agent is unevenly distributed, and preparation process is complicated, catalyst waste is serious；Binder Nafion is expensive, and cost is higher；PTFE
With hydrophobicity, the mass transfer that is unfavorable in Catalytic Layer；Particularly, sheet like air cathode causes to be catalyzed due to its electrode structure
Agent carrying capacity can be restricted, and when Catalytic Layer is blocked up, can reduce Catalytic Layer inner material efficiency of transmission, and then influence battery electricity production
Performance.
Due to its good scalability, the extension more suitable for MFC utilizes three dimensional pipe type air cathode.Tradition at present
The making of tubular air cathode is divided into two kinds：First, being fabricated to sheet like air cathode by flexible substrates, then carry out bending making
At tubular shape.Tubular air cathode prepared by this method, without essential distinction, can not overcome piece with traditional flake air cathode
Disadvantage caused by shape air cathode；Another kind is to utilize tubular type cathode, such as bamboo charcoal tube made of natural tubular material, but its ruler
Very little structure is uncontrollable, depends on the structure of material itself unduly, hydrogen reduction catalytic performance itself is poor, and bamboo difference itself compared with
Greatly, experiment is difficult to repeat, it is difficult to accomplish to utilize on a large scale.Therefore, develop that size is controllable, hydrogen reduction function admirable tubular type is cloudy
It is great to have preferable actual application prospect.
Invention content
Technical problem to be solved by the present invention lies in provide carbonaceous tubular type oxygen reduction cathode microbiological fuel cell and system
Preparation Method.
In order to solve the above-mentioned technical problem, first technical solution of the invention is：The controllable carbonaceous tubular type oxygen of size is also
Former cathode microbial fuel cell preparation method, it is characterised in that：Include the following steps：
A. prepared by cathode material：Ionized water is removed in beaker, is 1L by deionized water and the mixed proportion of agar powder：
80g~1L：Agar powder is added in 90g, and heating stirring adds fiber powder and chlorella pyrenoidosa algae powder, stirring is extremely to thick
It is uniformly mixed；The ratio of agar powder, fiber powder and chlorella pyrenoidosa algae powder is 4:1:15~4.5:1:17；Again by mixed solution
It is added in concentric column mold, centre bore is provided in the concentric column mold；So that mixed solution is formed by curing algae pipe, take out at
It is spare to be placed in 12~18h of freeze-drying in -20 DEG C~-25 DEG C of freeze drying box for the algae pipe of type.
B. cathode material is carbonized：The algae pipe of well cutting is positioned in high-temperature tubular electric furnace, nitrogen is vacuumized and fill, it
900 DEG C~950 DEG C are heated to 8 DEG C~10 DEG C/min of heating rate afterwards, under nitrogen atmosphere (nitrogen flow 35cm3/min
~40cm3/ min) it is carbonized 2~2.5 hours, then natural cooling waits for that furnace temperature is down to 100 DEG C or less taking-up algae pipes.
C. prepared by cathode：It is small that the algae pipe obtained after step B is heat-treated is placed in immersion 24 in the hydrochloric acid solution of 2M~2.2M
When, to remove metal therein, nonmetallic inclusion；It is cleaned for several times and is dried with deionized water and alcohol after taking-up；It completes
One layer of hole is mounted in algae inside pipe wall be less than 1 μm of separation membrane later.
D. battery assembles：The cathode outer side prepared in step C is wrapped with titanium silk, and by anode along cathode center axis direction
It is inserted into algae pipe；Load onto cover board respectively at cathode both ends again, blending bolt is fixed, wherein on a cover board there are electrolyte into
Mouthful, there are electrolyte outlets on another cover board, form tubular type cathode microbial fuel cell.
The controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method of size according to the present invention
Preferred embodiment, the separation membrane use poly (ether sulfone) film, polytetrafluoroethylene film, polyvinylidene fluoride film or glass fibre membrane.
Second technical solution of the present invention is a kind of carbonaceous tubular type oxygen reduction cathode Microbial fuel electricity that size is controllable
Pond, including cathode and anode, it is characterised in that：The cathode uses the algae pipe after carbonization, includes that pyrenoids is small in the algae pipe
Ball algae powder；The inner surface of the algae pipe is pasted with hole and is less than 1 μm of separation membrane；Cathode outer wall winds titanium silk, and anode is along algae Guan Zong
Axis direction is inserted into algae pipe；It is respectively provided with cover board at algae pipe both ends, cover board is bolted；It is provided on a cover board wherein
Electrolyte inlet is provided with electrolyte outlet on another cover board.
The preferred embodiment of the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size according to the present invention,
The algae pipe further includes having agar powder and fiber powder；Agar powder, fiber powder and chlorella pyrenoidosa powder press 4:1:15~4.5:1:
17 ratios mix.
The preferred embodiment of the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size according to the present invention,
The separation membrane uses poly (ether sulfone) film, polytetrafluoroethylene film, polyvinylidene fluoride film or glass fibre membrane.
The present invention concrete principle be：First using chlorella pyrenoidosa as the presoma of cathode and architecture basics, albumen
Core chlorella is a kind of nitrogen phosphorus enrichment material.Pouring molding in a mold tentatively obtains algae pipe structure.The gel characteristic of agar is true
It protects electrode size structure to fix, the mechanical strength and the electric conductivity after carbonization that acrylic fiber enhances algae pipe.It is freeze-dried algae pipe
In the process, the distillation of ice makes it have abundant interconnected pore structure, it is dry after algae pipe be carbonized 2 under 900 DEG C of nitrogen atmospheres
Hour, this not only secures intercommunicating pore structure abundant inside algae pipe to ensure the transmission of substance in electrode, while having obtained richness
The carbon backbone structure of Nitrogen-and Phosphorus-containing element doping；900 DEG C of high temperature cabonization ensure that char-forming material has lower ohmic internal resistance.This
The carbonaceous material of kind nitrogen phosphorus doping has a large amount of nitrogenous, phosphorous functional group, and absorption and the catalysis that can effectively carry out oxygen are anti-
It answers, there is superior catalytic performance.One layer of hole is mounted in air cathode inner wall and is less than 1 μm of barrier material, can effectively prevent negative and positive
It is short-circuit caused by being in direct contact between pole, while preventing bacterial growth in cathode, so as to avoid biomembrane to cathode performance
Adverse effect.
The preferred embodiment of carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method according to the present invention, institute
The separation membrane stated is using poly (ether sulfone) film, polytetrafluoroethylene film, polyvinylidene fluoride film or glass fibre membrane etc..
A kind of preferred side of carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method according to the present invention
The anode substrate of case, the microbiological fuel cell uses carbon cloth, carbon brush, carbon paper, carbon felt, carbon-point or graphite flake.
The controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell advantageous effect of size of the present invention is：This hair
Bright is on the one hand to reduce the making of microbiological fuel cell greatly as presoma and structural material using natural cheap material
And processing cost, while size controllably enables cathode meet different degrees of actual requirement, in addition tubular air cathode has rich
Rich intercommunicating pore structure, it is ensured that mass transfer is unrestricted；Since chlorella pyrenoidosa is rich in nitrogen P elements, make sky after carbonization
Gas cathode surface contains a large amount of C-N and C-P chemical bonds, can effectively carry out Oxygen Adsorption and catalysis is reacted so that carbonaceous is cloudy
It is great to have preferable hydrogen reduction performance, to improve the electricity generation performance of microbiological fuel cell entirety；The present invention is functional,
Size is controllable, and low energy consumption, and method is simple, easy to operate, at low cost, can be widely used in the energy, chemical industry, ring
The fields such as guarantor, have a good application prospect.
Description of the drawings
Fig. 1 is the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell structural schematic diagram of size.Fig. 2 a, 2b, 2c
It is that the cross section of carbonaceous algae pipe is placed under scanning electron microscope respectively, the photo figure in different resolution.
Fig. 2 d, 2e, 2f are that the outer surface of carbonaceous algae pipe is placed under scanning electron microscope respectively, in different resolution
Photo figure.
Fig. 3 a are microbiological fuel cell power density curves of the present invention.
Fig. 3 b are the anode and cathode polarization curves using microbiological fuel cell of the present invention.
Fig. 4 a are the electrochemical alternate impedance spectrum figures of microbial fuel cell air cathode of the present invention.
Fig. 4 b are microbiological fuel cell of the present invention and the Microbial fuel using Pt/C as cathod catalyst
The electrochemical alternate impedance spectrum comparison diagram of battery.
Fig. 5 is the linear voltammetric scan curve graph for inventing the microbial fuel cell air cathode.
Specific implementation mode
The present invention is further described specifically with reference to embodiment, embodiments of the present invention are not limited thereto.
With reference to figure 1, the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method of size, feature exists
In：Include the following steps：
A. prepared by cathode material：Ionized water is removed in beaker, is 1L by deionized water and the mixed proportion of agar powder：
80g~1L：Agar powder is added in 90g, and heating stirring adds fiber powder and chlorella pyrenoidosa algae powder, stirring is extremely to thick
It is uniformly mixed；The ratio of agar powder, fiber powder and chlorella pyrenoidosa algae powder is 4:1:15~4.5:1:17；Again by mixed solution
It is added in concentric column mold, centre bore is provided in the concentric column mold；So that mixed solution is formed by curing algae pipe, take out at
It is spare to be placed in 12~18h of freeze-drying in -20 DEG C~-25 DEG C of freeze drying box for the algae pipe of type；Fiber powder uses acrylic fiber
Powder.
B. cathode material is carbonized：The algae pipe of well cutting is positioned in high-temperature tubular electric furnace, nitrogen is vacuumized and fill, it
900 DEG C~950 DEG C, under nitrogen atmosphere, nitrogen flow 35cm are heated to 8 DEG C~10 DEG C/min of heating rate afterwards3/min
~40cm3/ min is carbonized 2~2.5 hours, and then natural cooling waits for that furnace temperature is down to 100 DEG C or less taking-up algae pipes.
C. prepared by cathode：It is small that the algae pipe obtained after step B is heat-treated is placed in immersion 24 in the hydrochloric acid solution of 2M~2.2M
When, it is cleaned for several times and is dried with deionized water and alcohol after taking-up；It is small in algae inside pipe wall one layer of hole of attachment after completion
In 1 μm of separation membrane.
D. battery assembles：The cathode outer side prepared in step C is wrapped with titanium silk, and by anode along cathode center axis direction
It is inserted into algae pipe；Load onto cover board respectively at cathode both ends again, blending bolt is fixed, wherein on a cover board there are electrolyte into
Mouthful, there are electrolyte outlets on another cover board, form tubular type cathode microbial fuel cell.
In a particular embodiment, the separation membrane uses poly (ether sulfone) film, polytetrafluoroethylene film, polyvinylidene fluoride film or glass
Glass tunica fibrosa.
The anode substrate of the microbiological fuel cell uses carbon cloth, carbon brush, carbon paper, carbon felt, carbon-point or graphite flake.
A kind of carbonaceous tubular type oxygen reduction cathode microbiological fuel cell that size is controllable, including cathode 8 and anode 5, it is described
Cathode 8 uses the algae pipe after carbonization, includes chlorella pyrenoidosa powder, agar powder and fiber powder in the algae pipe；The algae pipe by
Deionized water, agar powder, fiber powder and chlorella pyrenoidosa powder press 50：4：1：15~50：4.5：1：17 ratios mix and cure.
The inner surface of the algae pipe is pasted with hole and is less than 1 μm of separation membrane 6；The separation membrane using poly (ether sulfone) film, polytetrafluoroethylene film, partially
Poly- difluoride membranes or glass fibre membrane.Anode substrate uses carbon cloth, carbon brush, carbon paper, carbon felt, carbon-point or graphite flake.Outside cathode 8
Wall winds titanium silk 3, and anode 5 is inserted into along algae tube hub axis direction in algae pipe；Be respectively provided with cover board 7 at algae pipe both ends, cover board 7 by
Bolt 2 and screw rod 4 are fixed；It is provided with electrolyte inlet 9 on a cover board wherein, being provided with electrolyte on another cover board goes out
Mouth 1.
Embodiment 1：The controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size, preparation method：Including following
Step：
A. prepared by cathode construction：Using chlorella pyrenoidosa as presoma.It takes 50mL deionized waters in beaker, is added
4g agar powders, heating stirring are added 1g fibers, 15g chlorella pyrenoidosa algae powder are added after stirring evenly to thick, stir
It is extremely uniformly mixed, then mixed solution is added in concentric column mold, be provided with centre bore in the concentric column mold, make mixing
Solution is formed by curing algae pipe, and ensures that wall surface does not have bubble.Molding algae pipe is taken out, subzero 20 DEG C of freezings 12h is placed in, is freezing
It is dry in drying box, the algae pipe after drying is cut, algae pipe high 4.9cm, internal diameter 3.4cm, outer diameter 4.5cm are finally obtained.
B. cathode material is carbonized：The algae pipe of well cutting is positioned in high-temperature tubular electric furnace, nitrogen is vacuumized and fill, it
900 DEG C are heated to 10 DEG C/min of heating rate afterwards, under nitrogen atmosphere, nitrogen flow 40cm3/ min is carbonized 2 hours,
Then natural cooling waits for that furnace temperature is down to 100 DEG C or less taking-ups.Algae pipe after being carbonized is arranged in scanning electron microscope
Lower its microscopic characteristics of observation, find carbonization after algae pipe can keep abundant intercommunicating pore structure, for mass transfer provide compared with
Good channel, the photo under scanning electron microscope are shown in Fig. 2.
C. prepared by cathode：The sample obtained after step B is heat-treated is polished from pipe both ends, and formation length is
The smooth algae pipe of 2.5cm and section.Algae pipe is placed in 2M hydrochloric acid solutions and is impregnated 24 hours, deionized water and alcohol are used after taking-up
It is cleaned for several times and is dried.One layer of hole is mounted in inside pipe wall be less than 1 μm of polytetrafluoroethylene film after completion.
D. battery assembles：The cathode outer side prepared in step C is wrapped with titanium silk, and by a diameter of 0.8cm, and length is
The anode carbon brush of 2.1cm is inserted into along cathode center axis direction.Anode substrate using carbon cloth, carbon brush, carbon paper, carbon felt, carbon-point or
Graphite flake.Circular cover is loaded onto respectively at tubular type cathode both ends, and blending bolt is fixed, and there are electrolyte on a cover board wherein
Import, there are electrolyte outlets on another cover board, form tubular type cathode microbial fuel cell.
Embodiment 2
Embodiment 2：Carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method, this method are different from embodiment 1
Be the ratio of deionized water, agar powder, fiber and chlorella pyrenoidosa algae powder be 50：4.5：1：17；Separation membrane is
Glass fibre membrane.By sequence batch initiation under the conditions of 50 Ω extrernal resistances of assembled battery, its performance is measured after carrying out culture in 10 days
Curve shows that this battery has the output power of preferable cathode performance as shown in Fig. 3 a, 3b.The wherein culture of 1500COD
Base group is divided into：10.14g/L CH3COONa, 6g/L Na2HPO4, 1.5g/L KH2PO4, 0.05g/L NH4Cl, 0.5g/L
NaCl, 0.1g/L MgSO4·7H2O, 15mg/L CaCl2·2H2O and 1.6mg/L trace elements；Wherein trace element can be adopted
Use FeSO4·7H2O、ZnCl2、MnCl·4H2O、H3BO3、CaCl2·6H2O、CuCl2·2H2O, NiCl2·6H2O or
NaMoO4·2H2O, CoCl2·6H2O etc..
In addition, assembled battery is scanned using electrochemical workstation in the case of open circuit, the EIS measured is bent
For line as shown in Fig. 4 a, 4b, experiment shows that this battery has smaller ohmic internal resistance and mass transfer internal resistance.
Embodiment 3：The controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method of size, this method and implementation
Deionized water unlike example 1, agar powder, fiber and chlorella pyrenoidosa algae powder ratio be 50：4.2：1：16；Point
Diaphragm is polyvinylidene fluoride film, and the algae tube cathode for being wound with titanium silk is immersed in the culture medium of 1500COD, is passed through
30min saturation oxygen, using electrochemical workstation, is swept speed with 10mV/s, is scanned from 0.4V to ﹣ using three-electrode system
0.7V, the LSV curves measured are as shown in Figure 5.In three-electrode system, working electrode is algae tube cathode, is platinum electrode, ginseng to electrode
It is Ag/AgCl electrodes than electrode.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (6)
1. the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method of size, it is characterised in that：Including following
Step：
A. prepared by cathode material：Ionized water is removed in beaker, agar powder is added, heating stirring adds fiber to thick
Powder and chlorella pyrenoidosa algae powder are stirred to uniformly mixed；Mixed solution is added in concentric column mold again, the concentric column
Centre bore is provided in mold；So that mixed solution is formed by curing algae pipe, takes out molding algae pipe, be placed in freeze drying box and freeze
Drying for standby；
B. cathode material is carbonized：Algae pipe is positioned in high-temperature tubular electric furnace, nitrogen is vacuumized and fill, heating later is heated to
It 900 DEG C~950 DEG C, is carbonized under nitrogen atmosphere, then natural cooling waits for that furnace temperature is down to 100 DEG C or less taking-up algae pipes；
C. prepared by cathode：The algae pipe obtained after step B is heat-treated, which is placed in hydrochloric acid solution, to be impregnated, after taking-up with deionized water and
Alcohol is cleaned for several times and is dried；One layer of hole is mounted in algae inside pipe wall be less than 1 μm of separation membrane (6) after completion；
D. battery assembles：The cathode outer side prepared in step C is wrapped with titanium silk, and anode is inserted into along cathode center axis direction
In algae pipe；Cover board (7) is loaded onto respectively at cathode both ends again, and blending bolt (2) is fixed, and there are electrolyte on a cover board wherein
Import, there are electrolyte outlets on another cover board, form tubular type cathode microbial fuel cell.
2. the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method of size according to claim 1,
It is characterized in that：Deionized water, agar powder, fiber powder and chlorella pyrenoidosa powder press 50：4：1：15~50：4.5：1：17 ratios
Mixing.
3. the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell preparation method of size according to claim 1,
The separation membrane uses poly (ether sulfone) film, polytetrafluoroethylene film, polyvinylidene fluoride film or glass fibre membrane.
4. a kind of carbonaceous tubular type oxygen reduction cathode microbiological fuel cell that size is controllable, including cathode (8) and anode (5),
It is characterized in that：The cathode (8) uses the algae pipe after carbonization, includes chlorella pyrenoidosa powder in the algae pipe；The algae pipe it is interior
Surface mount has hole to be less than 1 μm of separation membrane (6)；Cathode outer wall winds titanium silk (3), and anode (5) is along algae tube hub axis direction
It is inserted into algae pipe；It is respectively provided with cover board (7) at algae pipe both ends, cover board (7) is fixed by bolt (2)；It is set on a cover board wherein
It is equipped with electrolyte inlet (9), electrolyte outlet (1) is provided on another cover board.
5. the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size according to claim 4, feature exist
In：The algae pipe further includes having agar powder and fiber powder；Agar powder, fiber powder and chlorella pyrenoidosa powder press 4:1:15~4.5:
1:17 ratios mix.
6. the controllable carbonaceous tubular type oxygen reduction cathode microbiological fuel cell of size according to claim 5, feature exist
In：The separation membrane uses poly (ether sulfone) film, polytetrafluoroethylene film, polyvinylidene fluoride film or glass fibre membrane.
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| CN112531182A (en) * | 2020-12-05 | 2021-03-19 | 重庆大学 | Portable cylindrical membraneless fuel cell with large reaction volume ratio |
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