CN101552341A - Composite structured proton exchanging membrane fuel cell bipolar plate and method for preparing the same. - Google Patents
Composite structured proton exchanging membrane fuel cell bipolar plate and method for preparing the same. Download PDFInfo
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- CN101552341A CN101552341A CNA2009100507458A CN200910050745A CN101552341A CN 101552341 A CN101552341 A CN 101552341A CN A2009100507458 A CNA2009100507458 A CN A2009100507458A CN 200910050745 A CN200910050745 A CN 200910050745A CN 101552341 A CN101552341 A CN 101552341A
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- fuel cell
- membrane fuel
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- bipolar plate
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a composite structured proton exchanging membrane fuel cell bipolar plate and a method for preparing the same, which belong to the fuel cell technology field. The composite structured proton exchanging membrane fuel cell bipolar plate has a graphite layer with thickness of 0.1-500mum and a carbon layer with thickness of 0.5-5mm; In which, the graphite layer covers the carbon layer; and the graphite layer and the carbon layer are connected without boundary by mesonphase carbon microballoons. Compared with the current technologies, the invention avoids the high temperature graphitization process which is necessary for obtaining carbon material with high electric/thermal conduction performance, is beneficial to mass production, reduces manufacturing cost, saves energy, and provides a new path to prepare proton exchanging membrane fuel cell with high-performance and low cost.
Description
Technical field
That the present invention relates to is the preparation method in a kind of fuel cell technology field, specifically is a kind of composite structured proton exchanging membrane fuel cell bipolar plate and preparation method thereof.
Background technology
Fuel cell is a kind of cleaning, Blast Furnace Top Gas Recovery Turbine Unit (TRT) efficiently.Fuel cell is divided into alkaline fuel cell, phosphoric acid type fuel cell, Proton Exchange Membrane Fuel Cells, Solid Oxide Fuel Cell and molten carbonate fuel cell five big classes according to used electrolytical difference.Wherein, Proton Exchange Membrane Fuel Cells except that the general characteristic with fuel cell (as energy transformation efficiency height, environmental friendliness etc.), also have simultaneously can start fast in room temperature, outstanding features such as no electrolyte loss, water are easily discharged, the life-span long, specific power and specific energy height.Therefore, it not only can be used for building the dispersion power station, also be suitable for especially as removable power source, be electric motor car and do not rely on air to advance one of ideal candidates power supply of submarine, being the general a kind of novel removable power sources of military and civilian, also is the optimal candidate power supply that utilizes chlor-alkali plant accessory substance hydrogen gas generation.Future be the hydrogen energy era of main energy carrier with hydrogen, it is best family power source.
The main structural components of Proton Exchange Membrane Fuel Cells has: membrane electrode, bipolar plates (also being flow-field plate and division board), diffusion layer and encapsulant.Wherein bipolar plates is occupied the weight and volume ratio of battery pile more than 80%, and preparation cost then accounts for 40～60% of whole stack cost.The material of the preparation dual polar plates of proton exchange membrane fuel cell that generally adopts has graphite, conductive filler/resin composite materials and metal material at present, the processing technology that adopts then has machine work (graphite cake, time-consuming consumptive material, the cost height), compression molding, injection moulding (conductive filler/resin composite materials, but conductivity, thermal conductivity and poor stability) and punch forming (metal material, can produce proton exchange membrane and pollute, it is short to increase internal resistance and life-span).
Through the retrieval of prior art not being found as yet associated materials and technology are in conjunction with the requirement that can satisfy the dual polar plates of proton exchange membrane fuel cell high-performance and low-cost well.This becomes a bottleneck problem of Proton Exchange Membrane Fuel Cells commercialized development and must solve.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of composite structured proton exchanging membrane fuel cell bipolar plate and preparation method thereof is provided, satisfy the requirement of dual polar plates of proton exchange membrane fuel cell high-performance and low-cost well, for the preparation high-performance, dual polar plates of proton exchange membrane fuel cell has proposed new path cheaply.
The present invention is achieved by the following technical solutions, the present invention relates to composite structured proton exchanging membrane fuel cell bipolar plate comprises: thickness is the graphite linings of 0.1～500 μ m and the charcoal layer that thickness is 0.5～5mm, wherein: graphite linings is coated on the outside of charcoal layer, and graphite linings does not have boundary by MCMB from sintering with the charcoal layer and is connected.
The present invention relates to the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate, may further comprise the steps:
(1) MCMB is adopted compression molding method directly obtain bipolar plates biscuit with the Proton Exchange Membrane Fuel Cells of complete runner;
(2) the bipolar plates biscuit that step (1) is obtained carries out the charing processing, naturally cools to room temperature then, makes the bipolar plates slab;
Described charing is handled and is meant: the sintering furnace that the bipolar plates biscuit is placed nonoxidizing atmosphere protection sintering 0.5～4 hour under 400～700 ℃ of environment;
(3) the bipolar plates slab of handling through charing in the step (2) being carried out successively surface catalysis processing and dry tack free handles;
Described surface catalysis is handled and is meant: the pressure that places catalyst solution to apply 0.5MPa～5MPa at normal temperatures the bipolar plates slab floods or catalyst solution is coated to the surface of bipolar plates slab;
(4) will carry out the graphite catalytic treatment through the bipolar plates slab that dry tack free is handled, carrying out the dry tack free processing, make dual polar plates of proton exchange membrane fuel cell then.
Described dry tack free is handled and is meant: drying is 2 hours under 120 ℃ of environment;
Described graphite catalytic treatment is meant: will place the sintering furnace of nonoxidizing atmosphere protection to rise to 1400 ℃ in the programming rate of 10 ℃/min through the pretreated bipolar plates slab of charing; be incubated and cool to room temperature with the furnace after 1 hour; with 5% hydrochloric acid the bipolar plates slab is carried out pickling then and be washed till colourlessly until the surface of bipolar plates slab, adopt deionized water that the bipolar plates slab is washed until pH=7 at last.
The mass ratio of described catalyst solution and MCMB is 0.05: 100～20: 100;
Described catalyst soakage solution is meant: solvent is an ethanol, and concentration is the CoCl of 0.05wt.%～20wt.%
26H
2O solution.
Described catalyst preferred concentration is the CoCl of 5wt.%～10wt.%
26H
2The O ethanolic solution.
Advantage of the present invention is to have avoided the essential pyrographite metallization processes for the raw material of wood-charcoal material that obtains the electric-conductivity heat-conductivity high performance, be beneficial to batch process, reduced production cost, energy savings is for the dual polar plates of proton exchange membrane fuel cell for preparing high-performance and low-cost has proposed new path.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
(1) preparation bipolar plates biscuit: the MCMB powder is adopted direct compression molding, and pressure is 100MPa, obtains the bipolar plates biscuit with the Proton Exchange Membrane Fuel Cells of complete runner;
(2) preparation charing preliminary treatment bipolar plates slab:, be cooled to room temperature with MCMB bipolar plates biscuit charing sintering 2 hours in 600 ℃ nonoxidizing atmosphere;
(3) surface impregnated catalyst is handled: take by weighing 10gCoCl
26H
2O is dissolved in the 200ml ethanolic solution, then the bipolar plates slab is joined in this solution normal temperature pressurization 5MPa dipping 5 hours, then will be through the bipolar plates taking-up of dipping, in 120 ℃ of dryings 2 hours;
(4) catalyzed graphitization is handled: will rise to 1400 ℃ with the programming rate of 10 ℃/min through the bipolar plates slab of dry tack free processing, and be incubated and cool off with stove after 1 hour.Treating that bipolar plates is cooled to after the room temperature is washed till colourlessly with 5% hydrochloric acid, and then be washed till pH=7 with deionized water; Placed at last under 120 ℃ of environment dry 2 hours, and made the compound proton exchange membrane fuel battery double plates.
Comparative example:
1) preparation bipolar plates biscuit: take by weighing the 100g MCMB and join that ball milling mixed 5 hours in the ethanolic solution, heating recovery ethanol and finish-drying with dried MCMB compression molding, obtain the bipolar plates biscuit then;
(2) preparation bipolar plates: biscuit is placed the vacuum-sintering retort, rise to 600 ℃ of insulations 2 hours, and then rise to 1400 ℃, be incubated and cool to room temperature with the furnace after 1 hour with the programming rate of 10 ℃/min with the programming rate of 5 ℃/min;
(3) treat that bipolar plates is cooled to after the room temperature and be washed till colourlessly with 5% hydrochloric acid, and then be washed till pH=7 with deionized water; Placed at last under 120 ℃ of environment dry 2 hours, and made dual polar plates of proton exchange membrane fuel cell.
Adopting the resistivity of the bipolar plates of the present invention's preparation is 20 μ Ω m, and thermal conductivity is 302w/ (mk), and rupture strength is 58MPa.These indexs are far superior to the index request of USDOE to dual polar plates of proton exchange membrane fuel cell, are respectively: resistivity is＜1000 μ Ω m, and thermal conductivity is＞100w/ (mk) that rupture strength is＞25MPa.
Adopting the resistivity of the bipolar plates of comparative example method preparation is 36 μ Ω m, and thermal conductivity is 292w/ (mk), and rupture strength is 67MPa.The compound proton exchange membrane fuel battery double plates for preparing gained according to the present embodiment method compared with prior art has high-performance, low cost, is beneficial to the technique effect of mass production.
Claims (8)
1, a kind of composite structured proton exchanging membrane fuel cell bipolar plate, it is characterized in that, comprise: thickness is the graphite linings of 0.1～500 μ m and the charcoal layer that thickness is 0.5～5mm, and wherein: graphite linings is coated on the outside of charcoal layer, and graphite linings is connected from sintering by MCMB with the charcoal layer.
2, a kind of preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 1 is characterized in that, may further comprise the steps:
(1) MCMB is adopted compression molding method directly obtain bipolar plates biscuit with the Proton Exchange Membrane Fuel Cells of complete runner;
(2) the bipolar plates biscuit that step (1) is obtained carries out the charing processing, naturally cools to room temperature then, makes the bipolar plates slab;
(3) the bipolar plates slab of handling through charing in the step (2) being carried out successively surface catalysis processing and dry tack free handles;
(4) will carry out the graphite catalytic treatment through the bipolar plates slab that dry tack free is handled, carrying out the dry tack free processing, make dual polar plates of proton exchange membrane fuel cell then.
3, the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 2; it is characterized in that described charing is handled and is meant: the sintering furnace that the bipolar plates biscuit is placed nonoxidizing atmosphere protection sintering 0.5～4 hour under 400～700 ℃ of environment.
4, the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 2, it is characterized in that described surface catalysis is handled and is meant: the pressure that places catalyst solution to apply 0.5MPa～5MPa at normal temperatures the bipolar plates slab floods or catalyst solution is coated to the surface of bipolar plates slab.
5, the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 2 is characterized in that, described dry tack free is handled and is meant: drying is 2 hours under 120 ℃ of environment.
6, the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 2; it is characterized in that; described graphite catalytic treatment is meant: will place the sintering furnace of nonoxidizing atmosphere protection to rise to 1400 ℃ in the programming rate of 10 ℃/min through the pretreated bipolar plates slab of charing; be incubated and cool to room temperature with the furnace after 1 hour; with 5% hydrochloric acid the bipolar plates slab is carried out pickling then and be washed till colourlessly until the surface of bipolar plates slab, adopt deionized water that the bipolar plates slab is washed until pH=7 at last.
7, the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 2 is characterized in that, the mass ratio of described catalyst solution and MCMB is 0.05: 100～20: 100.
8, the preparation method of composite structured proton exchanging membrane fuel cell bipolar plate according to claim 2 is characterized in that, concentration is the CoCl of 5wt.%～10wt.%
26H
2The O ethanolic solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100507458A CN101552341A (en) | 2009-05-07 | 2009-05-07 | Composite structured proton exchanging membrane fuel cell bipolar plate and method for preparing the same. |
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|---|---|---|---|
| CNA2009100507458A CN101552341A (en) | 2009-05-07 | 2009-05-07 | Composite structured proton exchanging membrane fuel cell bipolar plate and method for preparing the same. |
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|---|---|
| CN101552341A true CN101552341A (en) | 2009-10-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201391A (en) * | 2014-08-11 | 2014-12-10 | 宋福唐 | Low-temperature molding resin carbon plate and preparation method thereof |
| CN104937760A (en) * | 2013-02-27 | 2015-09-23 | 宝马股份公司 | Fuel cell system |
-
2009
- 2009-05-07 CN CNA2009100507458A patent/CN101552341A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937760A (en) * | 2013-02-27 | 2015-09-23 | 宝马股份公司 | Fuel cell system |
| CN104201391A (en) * | 2014-08-11 | 2014-12-10 | 宋福唐 | Low-temperature molding resin carbon plate and preparation method thereof |
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Open date: 20091007 |