CN200969373Y - Self-breathing direct methanol fuel cell - Google Patents
Self-breathing direct methanol fuel cell Download PDFInfo
- Publication number
- CN200969373Y CN200969373Y CNU2006201115855U CN200620111585U CN200969373Y CN 200969373 Y CN200969373 Y CN 200969373Y CN U2006201115855 U CNU2006201115855 U CN U2006201115855U CN 200620111585 U CN200620111585 U CN 200620111585U CN 200969373 Y CN200969373 Y CN 200969373Y
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- diffusion layer
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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
An air-breathing direct methanol fuel cell includes a solid electrolyte membrane, an anode assembly on one side of the solid electrolyte membrane, and a cathode assembly on the other side of the solid electrolyte membrane. The characteristics are in the following: the anode assembly includes a flow plate, a conductive capillary core layer, an anode diffusion layer and an anode catalyst layer, which, the flow plate is connected with the conductive capillary core layer, and the conductive capillary core layer is connected with the anode diffusion layer, and the anode diffusion layer is connected with the anode catalyst layer; the cathode assembly includes a cathode catalyst layer, a cathode diffusion layer, a cathode flow net and a porous thermal insulation layer, which, the cathode catalyst layer is connected with the cathode diffusion layer, and the cathode diffusion layer is connected with the cathode flow net, the cathode flow net is connected with the porous thermal insulation layer. The utility model can control the transfer of carbinol and the carbon dioxide effectively, the methanol concentration in the fuel is increased substantially, but the infiltration capacity of carbinol is not increased.
Description
Technical field
The utility model relates to battery, is specifically related to the self-respiration type direct methanol fuel cell that methyl alcohol or methanol aqueous solution are acted as a fuel and use.
Background technology
Direct methanol fuel cell (Direct Methanol Fuel Cell, be called for short DMFC) be a kind of of Proton Exchange Membrane Fuel Cells, with direct methyl alcohol or methanol aqueous solution is anode fuel, need not methyl alcohol or methanol aqueous solution are restructured as the methanol recapitalization apparatus of hydrogen-rich gas, have characteristics such as system configuration is simple, volume energy density is high, fuel supplement is convenient, be best suited for being used for the fuel cell of portable power source, power supply on vehicle etc., also most possibly realize commercialization.
Present existing self-respiration type direct methanol fuel cell single-cell structure mainly is made up of cathode collector plate, anode current collector plate, cathode diffusion layer, anode diffusion layer, cathode catalysis layer, anode catalyst layer, solid electrolyte film.
With the certain density fuel (methanol solution that generally is not higher than 5M, different according to operating pressure and temperature, they can be liquid phase or gas phase) deliver to anode, enter anode flow channel, enter anode diffusion layer by diffusion, arrive anode catalyst layer, electrocatalytic reaction takes place, discharge electronics, produce hydrogen ion.Anode electrochemical reacts other product to be got back in the anode flow channel mixture that forms anode reaction product and unreacted reactant by anode diffusion layer and discharges; Hydrogen ion is delivered to cathode catalysis layer by solid electrolyte film, in cathode catalysis layer with oxidant in oxygen reaction, consume accordingly simultaneously and pass to next electronics by external circuit, reaction product enters cathode flow channels by diffusion by cathode diffusion layer, forms the mixture of negative electrode product and unreacted reactant and discharges; Oxidant arrives cathode flow channels under the effect of free convection and concentration difference diffusion, be delivered to cathode catalysis layer by cathode diffusion layer, and electrochemical reaction takes place.Electronics is transferred to negative electrode (positive pole) from anode (negative pole) through external circuit and is formed direct current, and its electrode reaction is as follows:
Anode reaction: CH
3OH+H
2O → CO
2+ 6H
++ 6e
-E=0.046V
Cathode reaction: 3/2O
2+ 6H
++ 6e
-→ 3H
2O E=1.23V
Overall reaction: CH
3OH+3/2O
2+ H
2O → CO
2+ 3H
2O E=1.184V
In this course, part methyl alcohol is penetrated into negative electrode from anode under diffusion and the water effect of carrying, and directly reacts generation CO at cathode catalysis layer in oxygen
2And H
2O.Therefore, need only postcombustion constantly, fuel cell just can move incessantly, and electric energy is provided.
Yet, there are the following problems in the use as direct methanol fuel cell: cathode diffusion layer and runner are exposed in the air, the reaction heat production is lost to surrounding environment very soon, the electrode reaction temperature can only be a normal temperature, electrochemical reaction rates is low, battery performance is relatively poor, the methyl alcohol of supplying with anode just reacts and arrives negative electrode by dielectric film, promptly there is more serious methanol crossover problem, not only fuel availability is low, and the current potential of negative electrode also reduces, and power generation characteristics is significantly low, and methanol concentration is high more simultaneously, working temperature is high more, methanol crossover is serious more, for avoiding methanol crossover to cause the reduction of battery performance, methanol concentration generally is not higher than 5M in the existing fuel, thereby the raising of unit energy density is formed restriction.
Summary of the invention
At the defective that above-mentioned prior art exists, technical problem to be solved in the utility model is to provide a kind of can improve the electrode reaction temperature, controls the methanol crossover amount, significantly improves the self-respiration type direct methanol fuel cell of methanol concentration.
In order to solve the problems of the technologies described above, according to a technical scheme of the present utility model, a kind of self-respiration type direct methanol fuel cell is by solid electrolyte film, anode assemblies on face of described solid electrolyte film and the cathode assembly on another face of described solid electrolyte film constitute, it is characterized in that: described anode assemblies is by the anode current collector plate, the conduction wick layer, anode diffusion layer and anode catalyst layer constitute, wherein, described anode current collector plate is connected with the conduction wick layer, the conduction wick layer is connected with anode diffusion layer, anode diffusion layer is connected with anode catalyst layer, and anode catalyst layer is connected with a face of solid electrolyte film; Described cathode assembly is made of cathode catalysis layer, cathode diffusion layer, cathode collector net and porous insulating layer, wherein, described cathode catalysis layer is connected with cathode diffusion layer, cathode diffusion layer is connected with the cathode collector net, described cathode collector net is connected with described porous insulating layer, and cathode catalysis layer is connected with another face of solid electrolyte film.
A preferred version according to self-respiration type direct methanol fuel cell described in the utility model, conduction wick layer and anode diffusion layer and anode catalyst layer are hot pressed into an overall structure, cathode catalysis layer, cathode diffusion layer, cathode collector net and porous insulating layer are hot pressed into an overall structure, can make battery modularized, simple in structure, and be convenient to encapsulation, extend working time.
A preferred version according to self-respiration type direct methanol fuel cell described in the utility model, described anode assemblies is made of anode flow field board, wick layer, anode current collector net, anode diffusion layer and anode catalyst layer, described anode flow field board is connected with wick layer, wick layer is connected with the anode current collector net, the anode current collector net is connected with anode diffusion layer, and anode diffusion layer is connected with anode catalyst layer.
According to a preferred version of self-respiration type direct methanol fuel cell described in the utility model, wick layer, anode current collector net, anode diffusion layer and anode catalyst layer are hot pressed into an overall structure.
According to a preferred version of self-respiration type direct methanol fuel cell described in the utility model, described cathode collector net is a network structure.
Self-respiration type direct methanol fuel cell described in the utility model can effectively be controlled the transmission of methyl alcohol and carbon dioxide, make that methanol concentration can increase substantially in the fuel (near adopt analyze pure), and can not cause the increase of methanol crossover amount, thereby improved unit energy density, can export more multipotency for the fuel that carries equal in quality or volume, the work longer time; This utility model internal resistance is little, and volume is little, can reduce the heat radiation of battery, improves the electrode reaction temperature, accelerates electrode reaction speed, thereby improves battery performance; This utility model is simple in structure, and is convenient to encapsulation, and service time is long, can be widely used in fields such as portable power source, power supply on vehicle.
Description of drawings
Below in conjunction with accompanying drawing the utility model is elaborated.
Fig. 1 is the structural representation of the self-respiration type direct methanol fuel cell of employing conduction wick layer structure described in the utility model.
Fig. 2 is the structural representation of the self-respiration type direct methanol fuel cell of employing anode current collector web frame described in the utility model.
Embodiment
Referring to Fig. 1, Fig. 1 is the self-respiration type direct methanol fuel cell of this practical described employing conduction wick layer structure, by solid electrolyte film 8, cathode assembly on anode assemblies on 8 one faces of described solid electrolyte film and described solid electrolyte film 8 another faces constitutes, described anode assemblies is by anode current collector plate 2, conduction wick layer 5, anode diffusion layer 6 and anode catalyst layer 7 constitute, wherein, described anode current collector plate 2 is connected with conduction wick layer 5, conduction wick layer 5 is connected with anode diffusion layer 6, anode diffusion layer 6 is connected with anode catalyst layer 7, and anode catalyst layer 7 is connected with a face of solid electrolyte film 8; Described cathode assembly is made of cathode catalysis layer 9, cathode diffusion layer 10, cathode collector net 13 and porous insulating layer 14, wherein, described cathode catalysis layer 9 is connected with cathode diffusion layer 10, cathode diffusion layer 10 is connected with cathode collector net 13, described cathode collector net 13 is connected with described porous insulating layer 14, and cathode catalysis layer 9 is connected with another face of solid electrolyte film 8.Wherein, described conduction wick layer 5 can adopt the metal foaming material of handling through hydrophobic to be pressed into micron order thickness, be distributed with a plurality of holes above, anode current collector plate 2 adopts such as electric conducting materials such as graphite, stainless steels, described conduction wick layer 5 can be controlled the transmission of methyl alcohol and carbon dioxide, make that methanol concentration can increase substantially in the fuel (near adopt analyze pure), and can not cause the increase of methanol crossover amount, thereby improved unit energy density, can export more multipotency for the fuel that carries equal in quality or volume, the work longer time; What porous insulating layer 14 employing conductive coefficients were lower is incubated gas permeable material such as silicon dioxide, pottery etc., be distributed with a plurality of holes above, described porous insulating layer 14 can reduce the heat radiation of battery, improve the electrode reaction temperature, accelerate electrode reaction speed, thereby improve battery performance, cathode collector net 13 can reduce internal resistance, the space that reduces to occupy reduces the obstruction that target oxidant and negative electrode product and unreacted reactant transmit.
Wherein, conduction wick layer 5 is hot pressed into an overall structure with anode diffusion layer 6 and anode catalyst layer 7, cathode catalysis layer 9, cathode diffusion layer 10, cathode collector net 13 and porous insulating layer 14 are hot pressed into an overall structure, can make battery modularized, simple in structure, and be convenient to encapsulation, extend working time.
Referring to Fig. 2, Fig. 2 is the self-respiration type direct methanol fuel cell of employing anode current collector web frame described in the utility model, wherein anode assemblies is made of anode flow field board 16, wick layer 17, anode current collector net 15, anode diffusion layer 6 and anode catalyst layer 7, described anode flow field board 16 is connected with wick layer 17, wick layer 17 is connected with anode current collector net 15, anode current collector net 15 is connected with anode diffusion layer 6, and anode diffusion layer 6 is connected with anode catalyst layer 7; Described anode flow field board 16 can adopt the rigid plastics of non-conductive easy-formation again, can reduce cost, described wick layer 17 can adopt the macromolecular material of handling through hydrophobic, be distributed with a plurality of holes above, described wick layer 17 can be controlled the transmission of methyl alcohol and carbon dioxide, make that methanol concentration can increase substantially in the fuel (near adopt analyze pure), and can not cause the increase of methanol crossover amount.
Wherein, wick layer 17, anode current collector net 15, anode diffusion layer 6 and anode catalyst layer 7 are hot pressed into an overall structure.
Wherein, described cathode collector net 13 is network structures.
Referring to Fig. 1, certain density fuel 1 is delivered to anode, enter anode flow channel 3, enter the conduction wick layer 5 that constitutes by the very thin electronics good conductor of one deck by diffusion, the transmission of conduction wick layer 5 control methyl alcohol and carbon dioxide progresses into anode diffusion layer 6 and anode catalyst layer 7, and electrocatalytic reaction takes place, discharge electronics, produce hydrogen ion.Anode electrochemical reacts other product to be got back in the anode flow channel 3 mixture that forms anode reaction product and unreacted reactant 4 by anode diffusion layer 6 and discharges; Hydrogen ion is delivered to cathode catalysis layer 9 by solid electrolyte film 8, in cathode catalysis layer 9 with oxidant 11 in oxygen reaction, consume accordingly simultaneously and pass to next electronics by external circuit, reaction product enters cathode flow channels 13 and porous insulating layer 14 by diffusion by cathode diffusion layer 10, forms the mixture of negative electrode product and unreacted reactant 12 and discharges; Oxidant arrives cathode collector net 13 under the effect of free convection and concentration difference diffusion, be delivered to cathode catalysis layer 9 by cathode diffusion layer 10, and electrochemical reaction takes place.
Referring to Fig. 2, certain density fuel 1 is delivered to anode, enter anode flow channel 3, enter the wick layer 17 that constitutes by the very thin electronics good conductor of one deck by diffusion, anode current collector net 15 collected currents, thereby the requirement of antianode flow-field plate 16 and wick layer 17 reduces, no longer require its conductivity, the transmission of wick layer 17 control methyl alcohol and carbon dioxide, progress into anode current collector net 15, anode diffusion layer 6 and anode catalyst layer 7, electrocatalytic reaction takes place, discharge electronics, produce hydrogen ion, anode electrochemical reacts other product to be got back to the mixture that forms anode reaction product and unreacted reactant 4 in the anode flow channel 3 by anode diffusion layer 6 and discharges; Hydrogen ion is delivered to cathode catalysis layer 9 by solid electrolyte film 8, in cathode catalysis layer 9 with oxidant 11 in oxygen reaction, consume accordingly simultaneously and pass to next electronics by external circuit, reaction product enters cathode flow channels 13 by diffusion by cathode diffusion layer 10, forms the mixture of negative electrode product and unreacted reactant 12 and discharges; Oxidant arrives cathode collector net 13 under the effect of free convection and concentration difference diffusion, be delivered to cathode catalysis layer 9 by cathode diffusion layer 10, and electrochemical reaction takes place.
Claims (5)
1, a kind of self-respiration type direct methanol fuel cell is made of anode assemblies on solid electrolyte film (8), (8) faces of described solid electrolyte film and the cathode assembly on another face of described solid electrolyte film (8), it is characterized in that:
Described anode assemblies is made of anode current collector plate (2), conduction wick layer (5), anode diffusion layer (6) and anode catalyst layer (7), wherein, described anode current collector plate (2) is connected with conduction wick layer (5), conduction wick layer (5) is connected with anode diffusion layer (6), anode diffusion layer (6) is connected with anode catalyst layer (7), and anode catalyst layer (7) is connected with a face of solid electrolyte film (8);
Described cathode assembly is made of cathode catalysis layer (9), cathode diffusion layer (10), cathode collector net (13) and porous insulating layer (14), wherein, described cathode catalysis layer (9) is connected with cathode diffusion layer (10), cathode diffusion layer (10) is connected with cathode collector net (13), described cathode collector net (13) is connected with described porous insulating layer (14), and cathode catalysis layer (9) is connected with another face of solid electrolyte film (8).
2, self-respiration type direct methanol fuel cell according to claim 1, it is characterized in that: conduction wick layer (5) is hot pressed into an overall structure with anode diffusion layer (6) and anode catalyst layer (7), and cathode catalysis layer (9), cathode diffusion layer (10), cathode collector net (13) and porous insulating layer (14) are hot pressed into an overall structure.
3, self-respiration type direct methanol fuel cell according to claim 1, it is characterized in that: described anode assemblies is made of anode flow field board (16), wick layer (17), anode current collector net (15), anode diffusion layer (6) and anode catalyst layer (7), described anode flow field board (16) is connected with wick layer (17), wick layer (17) is connected with anode current collector net (15), anode current collector net (15) is connected with anode diffusion layer (6), and anode diffusion layer (6) is connected with anode catalyst layer (7).
4, self-respiration type direct methanol fuel cell according to claim 3 is characterized in that: wick layer (17), anode current collector net (15), anode diffusion layer (6) and anode catalyst layer (7) are hot pressed into an overall structure.
5, according to claim 1 or 2 or 3 or 4 described self-respiration type direct methanol fuel cell, it is characterized in that: described cathode collector net (13) is a network structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201115855U CN200969373Y (en) | 2006-10-26 | 2006-10-26 | Self-breathing direct methanol fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201115855U CN200969373Y (en) | 2006-10-26 | 2006-10-26 | Self-breathing direct methanol fuel cell |
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| Publication Number | Publication Date |
|---|---|
| CN200969373Y true CN200969373Y (en) | 2007-10-31 |
Family
ID=38968950
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201115855U Expired - Fee Related CN200969373Y (en) | 2006-10-26 | 2006-10-26 | Self-breathing direct methanol fuel cell |
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|---|---|
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510616B (en) * | 2009-03-31 | 2011-01-19 | 中国科学院长春应用化学研究所 | Support polar plate of passive self respiration direct fuel liquid battery |
| CN102324533A (en) * | 2011-07-28 | 2012-01-18 | 华南理工大学 | Self-breathing direct methanol fuel cell monomer based on porous metal fiberboard |
| CN101689653B (en) * | 2007-09-25 | 2013-11-20 | 株式会社东芝 | Fuel cell power generating system and method of manufacturing the same |
| CN105470545A (en) * | 2016-01-12 | 2016-04-06 | 山东联星能源集团有限公司 | Methanol fuel cell |
| CN105958095A (en) * | 2016-06-12 | 2016-09-21 | 华南理工大学 | Direct methanol fuel cell using current collection-diffusion composite layer |
| WO2017067417A1 (en) * | 2015-10-20 | 2017-04-27 | 西安交通大学 | Passive direct liquid fuel cell and preparation method therefor |
| CN109148927A (en) * | 2018-09-04 | 2019-01-04 | 重庆大学 | Air-breathing with submergence microjet is without film microfluid fuel cell |
| CN110534751A (en) * | 2019-09-04 | 2019-12-03 | 重庆大学 | Anode and cathode stacked passive type paper base microfluid fuel cell positioned opposite |
-
2006
- 2006-10-26 CN CNU2006201115855U patent/CN200969373Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101689653B (en) * | 2007-09-25 | 2013-11-20 | 株式会社东芝 | Fuel cell power generating system and method of manufacturing the same |
| CN101510616B (en) * | 2009-03-31 | 2011-01-19 | 中国科学院长春应用化学研究所 | Support polar plate of passive self respiration direct fuel liquid battery |
| CN102324533A (en) * | 2011-07-28 | 2012-01-18 | 华南理工大学 | Self-breathing direct methanol fuel cell monomer based on porous metal fiberboard |
| WO2017067417A1 (en) * | 2015-10-20 | 2017-04-27 | 西安交通大学 | Passive direct liquid fuel cell and preparation method therefor |
| CN105470545A (en) * | 2016-01-12 | 2016-04-06 | 山东联星能源集团有限公司 | Methanol fuel cell |
| 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 |
| CN105958095A (en) * | 2016-06-12 | 2016-09-21 | 华南理工大学 | Direct methanol fuel cell using current collection-diffusion composite layer |
| CN105958095B (en) * | 2016-06-12 | 2018-05-15 | 华南理工大学 | A kind of direct methanol fuel cell using current collection-diffusion composite bed |
| CN109148927A (en) * | 2018-09-04 | 2019-01-04 | 重庆大学 | Air-breathing with submergence microjet is without film microfluid fuel cell |
| CN109148927B (en) * | 2018-09-04 | 2021-03-19 | 重庆大学 | Air self-breathing membraneless microfluidic fuel cell with immersed microjets |
| CN110534751A (en) * | 2019-09-04 | 2019-12-03 | 重庆大学 | Anode and cathode stacked passive type paper base microfluid fuel cell positioned opposite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |