CN103066307B - Self-breathing direct methanol fuel cell - Google Patents
Self-breathing direct methanol fuel cell Download PDFInfo
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- CN103066307B CN103066307B CN201310015003.8A CN201310015003A CN103066307B CN 103066307 B CN103066307 B CN 103066307B CN 201310015003 A CN201310015003 A CN 201310015003A CN 103066307 B CN103066307 B CN 103066307B
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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
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Abstract
The invention provides a self-breathing direct methanol fuel cell which comprises a methanol storage tank, an anode supporting plate, an anode current collecting plate, a membrane electrode, a cathode current collecting plate and a cathode supporting layer which are successively connected. The self-breathing direct methanol fuel cell is characterized in that a supporting plate and a first ventilation plate are sequentially connected between the methanol storage tank and the anode supporting plate; the supporting plate is provided with a fuel filling port and a gas releasing port, and the surface of the supporting plate in connection with the first ventilation plate is provided with a current field; and the first ventilation plate is provided with a fuel filling port and a gas releasing port, the fuel filling port of the supporting plate is communicated with the fuel filling port of the first ventilation plate, and the gas releasing port of the supporting plate is communicated with the gas releasing port of the first ventilation plate. The cell provided by the invention has the advantages that a carbon dioxide semi-enclosed region is formed so as to prevent external oxygen from entering the cell and prevent an anode from being oxidized, the property of the methanol fuel cell provided by the invention is stable, a methanol solution the concentration of which is more than 5M is utilized, and the discharging time is long.
Description
Technical field
The present invention relates to methanol fuel cell field, particularly a kind of self-breathing direct methanol fuel cell.
Background technology
Direct methanol fuel cell belongs to the one in Proton Exchange Membrane Fuel Cells, directly uses methanol solution or steam methane to be fuel supply source, and does not need by methyl alcohol, gasoline or its reformation hydrogen production natural for sending out a point.Direct methanol fuel cell is gathered around in portable due to the feature such as have low-running-temperature, specific energy density is high, structure is simple, fail safe is good and is had broad application prospects.
Wherein, self-breathing direct methanol fuel cell is a kind of fuel cell being considered to have most market-oriented potentiality, it take methanol solution as fuel, with the oxygen in air for oxidant, at the anode of membrane electrode by methanol oxidation, ejected electron, proton and carbon dioxide, electronics arrives negative electrode by external circuit, and proton arrives negative electrode by proton exchange membrane, with the oxygen water generation reaction of negative electrode, release electric energy simultaneously, externally do work.The negative electrode of self-breathing direct methanol fuel cell is directly exposed in air, oxygen in air arrives cathode catalyst layer by diffusion transmission forms such as concentration difference diffusion and cross-ventilations and carries out electrochemical reducting reaction, without the need to battery auxiliary equipment and heating systems such as methyl alcohol peristaltic pump, air pumps, thus reduce energy ezpenditure and the production cost of battery itself, simplify fuel cell structure system, enable the kind of battery system and volume realize microminiaturization and commercialization smoothly.
At present, comprise from breathing methanol fuel cell the methanol solution storage pond, anode-supported plate, anode current collector plate, membrane electrode, cathode collector plate and the cathode branch fagging that connect successively.Wherein, anode-supported plate comprises two-layer hollow out and becomes diffusion ventilated membrane between the plate of several parallel channels and two-ply, diffusion ventilated membrane absorbs methanol solution, methanol solution is directly contacted with membrane electrode by conduit and anode current collector plate, when liquid level of solution is not enough to flood membrane electrode surface, the part that membrane electrode is not submerged will expose in atmosphere, the easy oxidation by air of the anode in membrane electrode, thus reduce the stability of battery.And it can only utilize concentration to be less than the methanol solution of 5mol/L.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of self-breathing direct methanol fuel cell, stable performance, discharge time is long.
The invention provides a kind of self-breathing direct methanol fuel cell, comprise the methyl alcohol storage tank connected successively, anode-supported plate, anode current collector plate, membrane electrode, cathode collector plate and cathode support layers, it is characterized in that, between described methyl alcohol storage tank and anode-supported plate, be connected with supporting bracket and the first air permeable plate in turn;
Described supporting bracket is provided with fuel inlet and gas disengages mouth; The surface that described supporting bracket is connected with the first air permeable plate is provided with flow field;
Described first air permeable plate is provided with fuel inlet and gas disengages mouth;
Fuel inlet on fuel inlet in described supporting bracket and the first air permeable plate communicates;
Gas in the described supporting bracket gas disengaged on mouth and the first air permeable plate disengages mouth and communicates.
Preferably, the second air permeable plate is provided with between described supporting bracket and the first air permeable plate; Described second air permeable plate is provided with fuel inlet and runner; Fuel inlet on second air permeable plate communicates with the fuel inlet on the first air permeable plate, and the runner on the second air permeable plate disengages mouth with the gas on the first air permeable plate and communicates.
Preferably, described supporting bracket is corrosion resistant plate, graphite cake or glass fiber reinforced polyester plate.
Preferably, described first air permeable plate is graphite paper, pellosil, rubber slab or fluorine film.
Preferably, the thickness of described first air permeable plate is less than 1mm and is greater than 0.1mm.
Preferably, described second air permeable plate is graphite paper, pellosil, rubber slab or fluorine film.
Preferably, the thickness of described second air permeable plate is less than 1mm and is greater than 0.1mm.
Preferably, described flow field is interdigital shape or snakelike.
Compared with prior art, methanol fuel cell of the present invention comprises the methyl alcohol storage tank connected successively, anode-supported plate, anode current collector plate, membrane electrode, cathode collector plate and cathode support layers, be connected with supporting bracket and the first air permeable plate in turn between described methyl alcohol storage tank and anode-supported plate; Described supporting bracket is provided with fuel inlet and gas disengages mouth; The surface that described supporting bracket is connected with the first air permeable plate is provided with flow field; Described first air permeable plate is provided with fuel inlet and gas disengages mouth; Fuel inlet on fuel inlet in described supporting bracket and the first air permeable plate communicates; Gas in the described supporting bracket gas disengaged on mouth and the first air permeable plate disengages mouth and communicates.
Methanol solution is entered by the fuel inlet of supporting bracket, fuel inlet through the first air permeable plate arrives anode-supported plate, then on membrane electrode, there is electrochemical reaction through anode current collector plate, the carbon dioxide that reaction generates is successively after anode current collector plate and anode-supported plate, the gas that gas on the first air permeable plate disengages in mouth and supporting bracket disengages mouth, discharges outside cell body.Supporting bracket, the first air permeable plate and anode-supported plate define the semi enclosed area of a carbon dioxide, prevent entering of extraneous oxygen, prevent anode oxidized, therefore methanol fuel cell stable performance of the present invention.In addition, the semi enclosed area of the carbon dioxide formed due to supporting bracket, the first air permeable plate and anode-supported plate inhibits the volatilization of methanol solution, and therefore methanol fuel cell of the present invention can utilize the methanol solution that concentration is more than 5M, and discharge time is long.
Accompanying drawing explanation
Fig. 1 is the STRUCTURE DECOMPOSITION figure of self-breathing direct methanol fuel cell of the present invention.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The invention provides a kind of self-breathing direct methanol fuel cell, comprise the methyl alcohol storage tank connected successively, anode-supported plate, anode current collector plate, membrane electrode, cathode collector plate and cathode support layers, it is characterized in that, between described methyl alcohol storage tank and anode-supported plate, be connected with supporting bracket and the first air permeable plate in turn;
Described supporting bracket is provided with fuel inlet and gas disengages mouth; The surface that described supporting bracket is connected with the first air permeable plate is provided with flow field;
Described first air permeable plate is provided with fuel inlet and gas disengages mouth;
Fuel inlet on fuel inlet in described supporting bracket and the first air permeable plate communicates;
Gas in the described supporting bracket gas disengaged on mouth and the first air permeable plate disengages mouth and communicates.
According to the present invention, of the present invention from breathing methyl alcohol direct fuel cell, comprise the methyl alcohol storage tank connected successively, anode-supported plate, anode current collector plate, membrane electrode, cathode collector plate and cathode support layers, each element described is by the through connection of screw.
The structure of the present invention to methyl alcohol storage tank is not particularly limited, and can store methanol solution.
The structure and material of antianode collector plate of the present invention is not particularly limited, and can select according to structure and material well known to those skilled in the art.
The present invention is not particularly limited the structure of membrane electrode and material, can select according to structure and material well known to those skilled in the art.
The structure and material of target collector plate of the present invention is not particularly limited, and can select according to structure and material well known to those skilled in the art.
The structure and material of target supporting layer of the present invention is not particularly limited, and can select according to structure and material well known to those skilled in the art.
Described anode-supported plate preferably comprises two-layer hollow out and becomes diffusion ventilated membrane between the plate of several parallel channels and two-ply, described diffusion ventilated membrane is necessary for hydrophilic material, be preferably cellular-plastic panels, rubber slab, inorganic material plate or fiber board to make, be more preferably porous fibre plate.The present invention is to methyl alcohol storage tank, and anode current collector plate, membrane electrode, cathode collector plate and cathode branch fagging are all not particularly limited, and prepare according to material well known to those skilled in the art and method.
Supporting bracket and the first air permeable plate is connected with in turn between described methyl alcohol storage tank and anode-supported plate;
Described supporting bracket is provided with fuel inlet and gas disengages mouth; The surface that described supporting bracket is connected with the first air permeable plate is provided with flow field; Described supporting bracket is preferably corrosion resistant plate, graphite cake or glass fiber reinforced polyester plate.Acting as of described flow field helps gas diffusion, and described flow field is interdigital shape or snakelike.The present invention is not particularly limited the proterties that fuel inlet and gas disengage mouth, and the fuel inlet in described supporting bracket and gas disengage mouth and is preferably circular.The present invention is also not particularly limited the size that fuel inlet and gas disengage mouth.Described fuel inlet and gas disengage the both sides that mouth is preferably placed at supporting bracket.
Described first air permeable plate is provided with fuel inlet and gas disengages mouth; Described first air permeable plate is preferably graphite paper, pellosil, rubber slab or fluorine film.The thickness of described first air permeable plate is less than 1mm and is greater than 0.1mm.The present invention is not particularly limited the proterties that fuel inlet and gas disengage mouth, and the fuel inlet on described first air permeable plate and gas disengage mouth and is preferably rectangle.The present invention is also not particularly limited the size that fuel inlet and gas disengage mouth.Described fuel inlet and gas disengage the side that mouth is preferably placed at the first air permeable plate.
Fuel inlet on fuel inlet in described supporting bracket and the first air permeable plate communicates;
Gas in the described supporting bracket gas disengaged on mouth and the first air permeable plate disengages mouth and communicates.
In order to increase sealing, between preferred described supporting bracket and the first air permeable plate, be provided with the second air permeable plate; Described second air permeable plate is provided with fuel inlet and runner; Fuel inlet on second air permeable plate communicates with the fuel inlet on the first air permeable plate, and the runner on the second air permeable plate disengages mouth with the gas on the first air permeable plate and communicates.Described second air permeable plate is preferably graphite paper, pellosil, rubber slab or fluorine film.The thickness of described second air permeable plate is preferably less than 1mm and is greater than 0.1mm.Described fuel inlet and gas disengage the both sides that mouth is preferably placed at the second air permeable plate.
As shown in Figure 1, Fig. 1 is the STRUCTURE DECOMPOSITION figure of self-breathing direct methanol fuel cell of the present invention, comprises the methyl alcohol storage tank L connected successively, supporting bracket A, second air permeable plate B, the first air permeable plate C, anode-supported plate G, anode current collector plate H, membrane electrode I, cathode collector plate J and cathode branch fagging K.Support plate A comprises fuel inlet 1, fastened by screw mouth 2, gas disengages mouth 3 and flow field 4.Described second supporting bracket comprises fuel inlet 5 and runner 6.Described first supporting bracket comprises fuel inlet 7 and gas disengages mouth 8.
Self-breathing direct methanol fuel cell of the present invention, a semienclosed cavity can be formed, be stored in methanol solution in methyl alcohol storage tank successively through the fuel gateway 1 of supporting bracket A, the fuel inlet 5 of the second air permeable plate B, the fuel inlet 7 of the first air permeable plate C arrives anode-supported plate G, arrive membrane electrode I through anode current collector plate H again and participate in electrochemical reaction, the gas permeation anode current collector plate H such as the carbon dioxide that reaction generates, gas successively on the first air permeable plate C disengages mouth 8, runner 6 on second air permeable plate B and the gas on supporting bracket A disengage mouth 3 discharges outside battery.
In self-breathing direct methanol fuel cell of the present invention, form a semienclosed cavity, the gas of generation is discharged outside battery along the air cavity that is similar to V-type, prevents the volatilization of methanol solution on the one hand, therefore can utilize the methanol solution that concentration is more than 5M, discharge time is long; On the other hand prevent entering of oxygen, thus provide a splendid region to anode, prevent anode oxidized.
Self-breathing direct methanol fuel cell of the present invention can also be composed in series pile.
The size of the present invention to self-breathing direct methanol fuel cell is not particularly limited, the battery that those skilled in the art can not wait according to the size designed size of membrane electrode, and the present invention can also be used for formic acid from breathing fuel cell.
Embodiment 1
Described from breathing methyl alcohol direct fuel cell structure as shown in Figure 1.
Described supporting bracket A is fiberglass reinforcing polyester plate, and the second air permeable plate B is graphite paper, and thickness is 0.8mm, and the first air permeable plate C is graphite cake, and thickness is 0.8mm.
Anode current collector plate H and cathode collector plate J is sheet metal, and thickness is 0.06mm.
Effective acting area of membrane electrode I is 2 × 2.5=5cm
2.
Discharge test is carried out to the self-breathing direct methanol fuel cell of the present embodiment, when injecting the methanol solution of 10mL 15M in methyl alcohol storage tank, described self-breathing direct methanol fuel cell can continuous discharge 60 hours between 0.3V ~ 0.4V under the electric current of 60 milliamperes.
Embodiment 2
A pile will be composed in series from breathing methyl alcohol direct fuel cell described in 10 embodiments 1, use the methanol solution of 120mL 15M to carry out discharge test, can continuous discharge 50 hours between 3V ~ 4V under the electric current of 60 milliamperes.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection range of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a self-breathing direct methanol fuel cell, comprises the methyl alcohol storage tank connected successively, anode-supported plate, anode current collector plate, membrane electrode, cathode collector plate and cathode support layers, it is characterized in that, between described methyl alcohol storage tank and anode-supported plate, be connected with supporting bracket and the first air permeable plate in turn;
Described supporting bracket is provided with fuel inlet and gas disengages mouth; The surface that described supporting bracket is connected with the first air permeable plate is provided with flow field;
Described first air permeable plate is provided with fuel inlet and gas disengages mouth;
Fuel inlet on fuel inlet in described supporting bracket and the first air permeable plate communicates;
Gas in the described supporting bracket gas disengaged on mouth and the first air permeable plate disengages mouth and communicates;
The second air permeable plate is provided with between described supporting bracket and the first air permeable plate; Described second air permeable plate is provided with fuel inlet and runner; Fuel inlet on second air permeable plate communicates with the fuel inlet on the first air permeable plate, and the runner on the second air permeable plate disengages mouth with the gas on the first air permeable plate and communicates.
2. self-breathing direct methanol fuel cell according to claim 1, is characterized in that, described supporting bracket is corrosion resistant plate, graphite cake or glass fiber reinforced polyester plate.
3. self-breathing direct methanol fuel cell according to claim 1, is characterized in that, described first air permeable plate is graphite paper, pellosil, rubber slab or fluorine film.
4. self-breathing direct methanol fuel cell according to claim 3, is characterized in that, the thickness of described first air permeable plate is less than 1mm and is greater than 0.1mm.
5. self-breathing direct methanol fuel cell according to claim 1, is characterized in that, described second air permeable plate is graphite paper, pellosil, rubber slab or fluorine film.
6. self-breathing direct methanol fuel cell according to claim 5, is characterized in that, the thickness of described second air permeable plate is less than 1mm and is greater than 0.1mm.
7. self-breathing direct methanol fuel cell according to claim 1, is characterized in that, described flow field is interdigital shape or snakelike.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015003.8A CN103066307B (en) | 2013-01-15 | 2013-01-15 | Self-breathing direct methanol fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310015003.8A CN103066307B (en) | 2013-01-15 | 2013-01-15 | Self-breathing direct methanol fuel cell |
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| CN103066307A CN103066307A (en) | 2013-04-24 |
| CN103066307B true CN103066307B (en) | 2015-05-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470545B (en) * | 2016-01-12 | 2018-05-04 | 山东联星能源集团有限公司 | A kind of methanol fuel cell |
| CN109148927B (en) * | 2018-09-04 | 2021-03-19 | 重庆大学 | Air self-breathing membraneless microfluidic fuel cell with immersed microjets |
| CN110635160B (en) * | 2019-09-26 | 2021-10-08 | 潍柴动力股份有限公司 | Solid oxide fuel cell and new energy automobile |
| CN111477906A (en) * | 2020-05-26 | 2020-07-31 | 上海交通大学 | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack |
| CN111477909A (en) * | 2020-05-26 | 2020-07-31 | 上海交通大学 | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack |
| CN112186198A (en) * | 2020-09-17 | 2021-01-05 | 北京航空航天大学 | Direct methanol fuel cell with anode using carbon nanotube paper as diffusion layer |
| CN114649543A (en) * | 2020-12-17 | 2022-06-21 | 中国科学院长春应用化学研究所 | Heat management device for direct methanol fuel cell power supply system |
| CN117117274B (en) * | 2023-10-24 | 2024-01-16 | 南方科技大学 | Formic acid fuel cell and preparation method thereof |
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Effective date of registration: 20180313 Address after: Changzhou City, Jiangsu province Hehai road 213000 No. 9 Patentee after: Changzhou Institute of Energy Storage Materials & Devices Address before: 130022 Changchun people's street, Jilin, No. 5625 Patentee before: Changchun Institue of Applied Chemistry, Chinese Academy of Sciences |