CN1305154C - Method for preparing bipolar plate of fuel cell by using thermoplastic resin as adhesive - Google Patents
Method for preparing bipolar plate of fuel cell by using thermoplastic resin as adhesive Download PDFInfo
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- CN1305154C CN1305154C CNB2005100114412A CN200510011441A CN1305154C CN 1305154 C CN1305154 C CN 1305154C CN B2005100114412 A CNB2005100114412 A CN B2005100114412A CN 200510011441 A CN200510011441 A CN 200510011441A CN 1305154 C CN1305154 C CN 1305154C
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- 239000000446 fuel Substances 0.000 title claims abstract description 28
- 239000000853 adhesive Substances 0.000 title claims abstract description 27
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 21
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 21
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 21
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 21
- 229910021382 natural graphite Inorganic materials 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 4
- 239000002562 thickening agent Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 23
- 238000001035 drying Methods 0.000 abstract description 3
- 238000005469 granulation Methods 0.000 abstract description 3
- 230000003179 granulation Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000010298 pulverizing process Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 2
- 229910021383 artificial graphite Inorganic materials 0.000 abstract 2
- 238000004898 kneading Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 239000004840 adhesive resin Substances 0.000 description 4
- 229920006223 adhesive resin Polymers 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Fuel Cell (AREA)
Abstract
The present invention relates to a method for preparing a dual-electrode plate of a fuel battery by utilizing thermoplastic resin as an adhesive, which belongs to the technical field of proton exchanging film fuel batteries. Natural graphite powder, synthetic graphite powder or a mixture of the natural graphite powder and the synthetic graphite powder is used as electric conducting skeletal material in the method, and B-3 or A-804 thermoplastic acrylic resin is used as an adhesive. The B-3 or A-804 is dissolved to obtain resin solution firstly, the resin solution and the electric conducting skeletal material are kneaded, and after kneading, a dual-electrode plate of a proton exchange film fuel battery is prepared through granulation, drying, pulverization and one-step forming by mold pressing. The dual-electrode plate prepared by the method has the advantages of high electric conductivity, high strength, low air permeability, low cost and stable running at low temperature, and the adopted thermoplastic resin has low forming temperature and short forming time. Besides, liquid melt has low viscosity, the adhesive and the electric conducting skeletal material are easy to mix uniformly, and prepared forming powder material is easy to transport and store for a long term.
Description
Technical field
The present invention relates to a kind of process of utilizing the plain compound of thermoplastic resin-based charcoal to prepare fuel battery double plates, belong to the Proton Exchange Membrane Fuel Cells technical field.
Background technology
Fuel cell (FC) is a kind of device that chemical energy is directly changed into electric energy by electrode reaction.Be characterized in that course of reaction does not relate to fossil fuel, energy conversion efficiency is not subjected to the restriction of " Carnot cycle ", so the energy conversion efficiency height.The energy of Proton Exchange Membrane Fuel Cells changes rate up to 60%～80%, and actual service efficiency then is 2 times [referring to International Power, 2001 (2): 24～26] of ordinary internal combustion engine.Variation, the environmental pollution of fuel is little, noise is low, reliability and maintainability are good, and advantages such as cold-starting, no electrolyte leakage are that other battery is unrivaled.Therefore be acknowledged as the first-selected power supply that promises to be space flight, military affairs, electric automobile and regional power station most.
Bipolar plates is the vitals of Proton Exchange Membrane Fuel Cells, and also being influences battery performance, especially influences a key factor of power of battery density and manufacturing cost.In the PEMFC battery pack, requiring bipolar plate material is the good conductor of electricity and heat, has high resistance to corrosion and suitable runner.At present, fuel cell technology is quite ripe, be in business-like eve, because the cost of manufacture and the price higher (2000～3000dollars/Kw) of fuel cell, article [Per Ekdunge, MonikaRaberg.The fuel cell vehicle analysis of energy use, Emissions and cost, Int.J Hydrigeb Ebergym1998,23 (5): 381～385], cost of manufacture to fuel cell is assessed, and wherein the cost of manufacture of bipolar plates accounts for the 60%-70% of whole fuel cell, has become and has limited one of its business-like obstacle.
People such as HENTALL L P study the different materials that can be used for dual polar plates of proton exchange membrane fuel cell at [the 80th phase of J Power Sources] in 1999 " New materials for polymerelectrolyte membrane fuel cell current collectors " literary composition, and that these materials comprise is gold-plated, stainless steel, titanium and the flake graphite etc. of aluminium.Flake graphite is compared performance with standard graphite and is improved a lot, and cheap, be easy to machine work.But it is easy to collsion damage, and its compressibility has hindered its application in many battery pile.Gold-plated, aluminium sheet must guarantee the complete imporosity of coating as the bipolar plates of Proton Exchange Membrane Fuel Cells, to avoid the reaction of aluminium sheet and electrolyte solution.The performance of titanium plate that scribbles nitride is similar to conventional graphite, be easy to preparation, and the titanium plate is firm, and volume is little, the water-cooling apparatus of also can in plate, packing into simultaneously, but the titanium material cost is higher.Gold-plated corrosion resistant plate performance is better than the conventional graphite plate, and more cheap than titanium, but its density is big, simultaneously because its passivated surface layer in conjunction with very stable under the temperature, therefore is difficult to carry out diffusion-bonded.Because the stainless steel relative cost is low, intensity is high, easily processing and moulding, fuel cell studies group of Birmingham, GBR university will its bipolar plate material as Proton Exchange Membrane Fuel Cells.
Aspect the bipolar plates development, fuel cell ERC of Dalian Chemical Physics institute has initiated the metal sheet modification and has prepared bipolar plates technology, compares with traditional graphite bi-polar plate, and cost descends, but cost of manufacture is still very high.
The bipolar plates that single flexible graphite is made, though have good conduction, thermal conductivity, the intensity of palette is low, therefore how to improve its intensity by process means has certain difficulty to satisfy instructions for use; For large scale thin type bipolar plates, strengthen though can add metal forming, under the less situation of thickness, the full surface that how to make the even clad metal paper tinsel of flexible graphite is technological difficulties.
Select for use appropriate resin to make adhesive, make the conduction aggregate under certain process conditions, can prepare the composite material double pole plate that performance satisfies the pile requirement with graphite.Patent CN 1555106A (application number 200310112927.6) discloses a kind of can be used for the preparing compound of the plain composite material double pole plate of resin-based charcoal and the preparation technology of bipolar plates.This patent adopts thermosetting phenolic modified vinyl resin to make adhesive, makes the conduction aggregate with artificial and natural admixed graphite, prepares the compound of resin and graphite.This compound is prepared conductivity at 110～500S/cm by the mold pressing one-shaping technique under certain temperature condition, rupture strength is greater than the plain composite material double pole plate of the resin-based charcoal of 25MPa.By dress stack operation and stability experiment, performance such as the gas permeability of bipolar plates, corrosion resistance and stability all can reach instructions for use.But the weak point that this patent adopts thermosetting resin to make adhesive is the curing temperature height; Contain interior curing of moulding powder short time (3 days) of adhesive, be unfavorable for storage, transportation and the mechanization production of bipolar plates moulding powder; Next is coarse with the bipolar plate surfaces that thermosetting resin is purchased out, influences product quality.Abroad (referring to Injection moulded low cost bipolar plates for PEM fuel cells, J Power Sources131 (2004) 35-40) conductivity of using thermoplastic resin to prepare bipolar plates by injection mo(u)lding is 5-150S/cm, though the production efficiency height, poorly conductive; Use the melt viscosity of resin big simultaneously, be difficult to and conduct electricity aggregate mix, be difficult to guarantee the homogeneity of bipolar plates performance.
Summary of the invention
The purpose of this invention is to provide a kind of process of utilizing the plain compound of thermoplastic resin-based charcoal to prepare fuel battery double plates, make its bipolar plates that makes not only have higher conductivity, higher intensity and lower air penetrability, low cost, can stable operation under lower temperature, and used thermoplastic resin has lower forming temperature and short molding time, and fused mass has lower viscosity, adhesive and conduction aggregate are easy to mix, and the moulding powder that makes is easy to transportation and long storage time.
Technical scheme of the present invention is as follows:
A kind of method of utilizing the plain compound of thermoplastic resin-based charcoal to prepare fuel battery double plates is characterized in that this method comprises the steps:
1) is adhesive with thermoplastic acrylic resin B-3 or A-804,, pinches in the pot resin solution and the mixed thickener of pinching into of conduction aggregate mixed with B-3 or A-804 acetone solution resin solution; The mass percentage content of described thermoplastic acrylic resin and conduction aggregate is respectively 7%～20% and 80%～93%; Described conduction aggregate adopts the mixed powder of graphous graphite powder, natural graphite powder or two kinds of graphite powders;
2) with comminutor above-mentioned thickener is made φ 4～5mm, the particle of length 4～5mm is removed acetone by vacuumize;
3) dried particle is ground into the powder of granularity＜1.5mm with pulverizer;
4) adopt die press technology for forming with described powder moulding, compression molding pressure is 6MPa～50MPa, is preferably 20MPa～30MPa; 120 ℃～180 ℃ of forming temperatures are preferably 130 ℃～140 ℃.
The mass percentage content of thermoplastic acrylic resin above-mentioned steps 1) and conduction aggregate is preferably 10%～16% and 84%～90% respectively.
The present invention compared with prior art, have the following advantages and the high-lighting effect: used thermoplastic resin has lower forming temperature and short molding time, and fused mass has lower viscosity, adhesive and conduction aggregate are easy to mix, and the moulding powder that makes is easy to transportation and long storage time; With the bipolar plates that compound of the present invention makes, volume conductance at normal temperatures is 200S/cm～500S/cm; The rupture strength of bipolar plates is 25MPa～40MPa under the normal temperature; Air transmission coefficient under the normal temperature is 10
-7Cm
2/ s; The density of bipolar plates is 1.85g/cm under the room temperature
3～2.0g/cm
3
Description of drawings
Fig. 1 is the process chart of preparation fuel battery double plates provided by the present invention.
Embodiment
Below concrete enforcement of the present invention is further described.
The conduction aggregate: in composite material of the present invention, used conduction aggregate is a natural graphite powder, or graphous graphite powder, or the mixed powder of two kinds of graphite powders, and the granularity of graphite is generally-150 orders; Conduction aggregate consumption accounts for 80%～93% of composite material weight, and preferred value is 84%～90%.
Adhesive resin: adhesive resin not only plays the effect that other solid particle in the composite material is bonded together, also can have influence on the intensity of bipolar plates, also can influence conductivity and the bipolar plates stability in use and the process conditions of moulding of bipolar plates simultaneously.As the adhesive resin of bipolar plates, not only require to improve the conductivity of bipolar plates, to have suitable forming temperature and briquetting pressure simultaneously, have excellent acid, alkali resistance.Adhesive resin as composite material of the present invention is A-804 and B-3 thermoplastic acrylic resin.
The preparation of bipolar plates:
The technological process of preparation compound powder provided by the invention and bipolar plates following (as Fig. 1): earlier thermoplastic resin A-804 and B-3 are made resin solution with acetone solution, solution temperature is generally at 15～56 ℃, again this resin solution and graphite aggregate are mixed and pinch, φ 4～5mm will be made by comminutor in the mixed back of pinching, the particle of length 4～5mm is removed acetone by vacuumize; Utilize the pulverizer crushing screening, obtain the compound powder of granularity＜1.5mm.Described conduction aggregate can be a graphous graphite powder, also can be natural graphite powder, also can be the mixed powder of two kinds of graphite powders; Described thermoplastic resin is A-804 and B-3 thermoplastic acrylic resin; The preferred content of its conduction aggregate is 84%～90% in the composite material of preparation fuel battery double plates of the present invention; Thermoplastic resin content is 7%～20%, and preferred content is 10%～16%.Mixed pinching is to carry out in double worm mixer; Granulation is to carry out granulation with the common comminutor on the market; Drying is to carry out drying with vacuum dryer; Pulverizing is to pulverize the powder particles＜1.5mm after the pulverizing with beater grinder.
Adopt die press technology for forming with described powder moulding: adopt compression molding or injection mo(u)lding, compression molding pressure is 6MPa～50MPa, and preferred briquetting pressure is 20MPa～30Mpa, 120 ℃～180 ℃ of forming temperatures, and preferred forming temperature is 130 ℃～140 ℃.It is a kind of for being applied directly to the external release agent of the XTEND 19W type on the mould to adopt compression molding to use, and generally is being higher than 25 ℃, is being lower than 250 ℃ of following film forming.When filming, at first oily thing, dust on the die surface are cleaned out, then mold heated is arrived operating temperature, with textile cloth release agent XTEND 19W is coated on the mould, wipe unnecessary release agent, apply two-layer or two-layer above XTEND 19W again, dry, curing joins batch mixing then and carries out mold pressing in the film chamber.This release agent can directly be bought from Lars composite material Co., Ltd of Beijing section.
Embodiment 1:
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 59
Natural graphite powder (150 orders, conduction aggregate) 29
B-3 thermoplastic acrylic resin (adhesive) 12
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
Performance is as follows:
Density: 1.98g/cm3 conductivity: 340S/cm rupture strength: 39MPa
Embodiment 2
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 0
Natural graphite powder (150 orders, conduction aggregate) 88
B-3 thermoplastic acrylic resin (adhesive) 12
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 2.01g/cm
3Conductivity: 470S/cm rupture strength: 36MPa
Embodiment 3
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 88
Natural graphite powder (150 orders, conduction aggregate) 0
B-3 thermoplastic acrylic resin (adhesive) 12
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.96g/cm
3Conductivity: 240S/cm rupture strength: 40MPa
Embodiment 4
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
B-3 thermoplastic acrylic resin (adhesive) 16
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.95g/cm
3Conductivity: 260S/cm rupture strength: 35MPa
Embodiment 5
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
B-3 thermoplastic acrylic resin (adhesive) 16
Briquetting pressure: 50MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.94g/cm
3Conductivity: 230S/cm rupture strength: 34MPa
Embodiment 6
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 46.5
Natural graphite powder (150 orders, conduction aggregate) 46.5
B-3 thermoplastic acrylic resin (adhesive) 7
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.94g/cm
3Conductivity: 520S/cm rupture strength: 20MPa
Embodiment 7
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 45
Natural graphite powder (150 orders, conduction aggregate) 45
B-3 thermoplastic acrylic resin (adhesive) 10
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.97g/cm
3Conductivity: 500S/cm rupture strength: 38MPa
Embodiment 8
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 40
Natural graphite powder (150 orders, conduction aggregate) 40
B-3 thermoplastic acrylic resin (adhesive) 20
Briquetting pressure: 20MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.90g/cm
3Conductivity: 180S/cm rupture strength: 38MPa
Embodiment 9
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
B-3 thermoplastic acrylic resin (adhesive) 16
Briquetting pressure: 30MPa
Forming temperature: 160 ℃
The bipolar plates performance is as follows:
Density: 1.96g/cm
3Conductivity: 225S/cm rupture strength: 40MPa
Embodiment 10
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
B-3 thermoplastic acrylic resin (adhesive) 16
Briquetting pressure: 30MPa
Forming temperature: 180 ℃
The bipolar plates performance is as follows:
Density: 1.95g/cm
3Conductivity: 230S/cm rupture strength: 40MPa
Embodiment 11
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
A-804 thermoplastic acrylic resin (adhesive) 16
Briquetting pressure: 30MPa
Forming temperature: 120 ℃
The bipolar plates performance is as follows:
Density: 1.90g/cm
3Conductivity: 180S/cm rupture strength: 25MPa
Embodiment 12
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
A-804 thermoplastic acrylic resin (adhesive) 14
Briquetting pressure: 30MPa
Forming temperature: 130 ℃
The bipolar plates performance is as follows:
Density: 1.95g/cm
3Conductivity: 200S/cm rupture strength: 27MPa
Embodiment 13
Quality of materials percentage (%)
Graphous graphite powder (150 orders, conduction aggregate) 42
Natural graphite powder (150 orders, conduction aggregate) 42
A-804 thermoplastic acrylic resin (adhesive) 7
Briquetting pressure: 6MPa
Forming temperature: 140 ℃
The bipolar plates performance is as follows:
Density: 1.85g/cm
3Conductivity: 250S/cm rupture strength: 20MPa
Claims (3)
1. one kind is utilized thermoplastic resin for adhesive prepares the method for fuel battery double plates, it is characterized in that this method comprises the steps:
1) is adhesive with thermoplastic acrylic resin B-3 or A-804,, pinches in the pot resin solution and the mixed thickener of pinching into of conduction aggregate mixed with B-3 or A-804 acetone solution resin solution; The mass percentage content of described thermoplastic acrylic resin and conduction aggregate is respectively 7%～12% and 88%～93%; Described conduction aggregate adopts the mixed powder of graphous graphite powder, natural graphite powder or two kinds of graphite powders;
2) with comminutor above-mentioned thickener is made φ 4～5mm, the particle of length 4～5mm is removed acetone by vacuumize;
3) dried particle is ground into the powder of granularity＜1.5mm with pulverizer;
4) adopt die press technology for forming with described powder moulding, compression molding pressure is 6MPa～50MPa, 120 ℃～180 ℃ of forming temperatures.
2. in accordance with the method for claim 1, it is characterized in that: the pressure of compression molding described in the step 4) is 20MPa～30MPa, and forming temperature is 130 ℃～140 ℃.
3. it is characterized in that in accordance with the method for claim 1: the granularity of described conduction aggregate is-150 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100114412A CN1305154C (en) | 2005-03-18 | 2005-03-18 | Method for preparing bipolar plate of fuel cell by using thermoplastic resin as adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100114412A CN1305154C (en) | 2005-03-18 | 2005-03-18 | Method for preparing bipolar plate of fuel cell by using thermoplastic resin as adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1688052A CN1688052A (en) | 2005-10-26 |
| CN1305154C true CN1305154C (en) | 2007-03-14 |
Family
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| CNB2005100114412A Expired - Fee Related CN1305154C (en) | 2005-03-18 | 2005-03-18 | Method for preparing bipolar plate of fuel cell by using thermoplastic resin as adhesive |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859905B (en) * | 2010-06-23 | 2012-06-20 | 湖南大学 | Method for preparing graphite/resin compound bipolar plate for fuel cell |
| CN102408106A (en) * | 2010-09-17 | 2012-04-11 | 豪亚兴业有限公司 | Method for making porous graphite block by using graphite powder |
| CN102569828A (en) * | 2010-12-22 | 2012-07-11 | 清华大学 | Microcrystal graphite compound for double-pole plate of fuel cell and preparation method of microcrystal graphite compound |
| CN102305812B (en) * | 2011-05-25 | 2013-03-27 | 天津力神电池股份有限公司 | Method for detecting dispersion effect of lithium ion battery slurry on line |
| CN108808037A (en) * | 2018-06-12 | 2018-11-13 | 江苏墨泰新材料有限公司 | Fuel battery double plates, fuel cell, fuel battery engines and electric vehicle |
| CN109167072A (en) * | 2018-09-07 | 2019-01-08 | 米库玻璃纤维增强塑料泰州有限责任公司 | A kind of graphite bi-polar plate manufacturing process |
| CN109671955A (en) * | 2018-12-27 | 2019-04-23 | 常州博翊碳素科技有限公司 | The injection moulding process of fuel cell graphite composite bipolar plate |
| CN113270605B (en) * | 2021-04-23 | 2022-12-09 | 四川东材科技集团股份有限公司 | Preparation method of cold-pressed composite bipolar plate |
| CN113437320A (en) * | 2021-06-19 | 2021-09-24 | 开封平煤新型炭材料科技有限公司 | Method for preparing graphite bipolar plate by one-step forming |
| CN116072905B (en) * | 2021-12-06 | 2023-06-27 | 北京华胜信安电子科技发展有限公司 | Composite material, composite graphite bipolar plate, fuel cell and preparation method |
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- 2005-03-18 CN CNB2005100114412A patent/CN1305154C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63211570A (en) * | 1987-02-25 | 1988-09-02 | Shin Kobe Electric Mach Co Ltd | Stack sealing method |
| JPH1036179A (en) * | 1996-07-23 | 1998-02-10 | Showa Denko Kk | Production of porous carbon plate |
| CN1509502A (en) * | 2001-05-11 | 2004-06-30 | ��Ԩ��ѧ��ҵ��ʽ���� | Separator for solid polymer type fuel cell and method for producing same |
| CN1555106A (en) * | 2003-12-26 | 2004-12-15 | 清华大学 | Process for preparing fuel cell bipolar plate and composite material used thereof |
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| CN1688052A (en) | 2005-10-26 |
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