CN100492736C - Process of producing double pole plates for fuel cell - Google Patents
Process of producing double pole plates for fuel cell Download PDFInfo
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- CN100492736C CN100492736C CNB2007100144559A CN200710014455A CN100492736C CN 100492736 C CN100492736 C CN 100492736C CN B2007100144559 A CNB2007100144559 A CN B2007100144559A CN 200710014455 A CN200710014455 A CN 200710014455A CN 100492736 C CN100492736 C CN 100492736C
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
This invention relates to preparing method for dual-pole plates of proton exchange membrane fuel batteries characterizing in taking Al alloy as the matrix material and applying computer carving to prepare a flow field and applying alkali and acid dual liquor system to chemically plate NiP alloy to reform its surface, which has good heat-conduction and conduction performances, small contact resistance, anti-corruption and easy process, high yield and low cost, the anti-corrosion performance is better than 316 stainless steel, the volume resistivity of 3mm thick is 8-10mumohm cm corresponding to pure nickel, 1/10-1/7 of 316 nstainless steel and 1/20-1/15 of graphite.
Description
Technical field
The invention belongs to the new energy materials field, particularly relate to a kind of preparation method of used in proton exchange membrane fuel cell bipolar plates.
Background technology
Proton Exchange Membrane Fuel Cells (PEMFC) outstanding advantages such as working temperature is low, startup is fast owing to having, no burn into is not afraid of the easy adjustment of vibrations, energy density height and power output become the research and development focus of fuel cell.Present bipolar plates adopts material preparations such as carbon plate, graphite-resin, stainless steel, and the problem that these bipolar plates exist: the mechanical strength of carbon plate bipolar plates is low, porosity is high, the flow field processing difficulties; Low, the flow field processing difficulties of the conductivity of graphite-resin composite materials bipolar plates; Big, easy oxidation of the density of bipolar plate of stainless steel and poorly conductive.Simultaneously, above-mentioned bipolar plates cost is also higher, has restricted PEMFC and has applied.Consider from combined factors such as conductance, mechanical strength and density, aluminium alloy is the ideal material of dual polar plates of proton exchange membrane fuel cell, but because oxidation reaction takes place in aluminium alloy easily, not only oxide-film causes contact resistance to increase, and the dissolved aluminum ion also can pollute eelctro-catalyst and proton exchange membrane, causes battery performance to reduce.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and a kind of preparation method of used in proton exchange membrane fuel cell bipolar plates is provided.The bipolar plates heat conduction of adopting the preparation of this method with conduct electricity very well, corrosion-resistant, rate of finished products is high and price is low.
The present invention realizes in the following manner:
A kind of preparation method of bipolar plate for fuel cell is characterized in that with the aluminium alloy being basis material, adopts alkali electroless nickel preplating and acid chemical plating nickel that it is carried out surface modification treatment, specifically may further comprise the steps:
1. be basis material with the aluminium alloy, adopt the computer carving method to prepare the flow field, the width of flow path and the degree of depth are 0.5～1.5mm;
2. the alloy matrix aluminum material that will carve behind the flow field carries out oil removing and acid-wash activation preliminary treatment, makes its no oil in surface and No oxided film;
3. pretreated alloy matrix aluminum material is soaked zinc and handle solution composition and technological parameter: NaOH 80～100g/L, white vitriol 30～50g/L, sodium fluoride 100～120g/L, anhydrous ferric trichloride 1～5g/L, 35～40 ℃ of temperature, time 30～120s; Adopt secondary soaking zinc can obtain the zinc-impregnating layer of even compact; Dezincifying solution is formed and technological parameter: nitric acid 500ml/L, 20～40 ℃ of temperature, move back to the greatest extent till;
4. will soak alloy matrix aluminum material chemical plating nickel-phosphorus alloy in alkaline solution that zinc is handled, thickness of coating is 0.5～1.5 μ m, solution composition and technological parameter are: nickel sulfate hexahydrate 20～30g/L, inferior sodium phosphate 18～28g/L, citric acid 35～50g/L, pH=9～10,65～75 ℃ of temperature, time 3～5min;
5. with alloy matrix aluminum material chemical plating nickel-phosphorus alloy in acid solution of alkaline nickel preplating phosphorus alloy, obtain surface modification aluminium alloy bipolar plates, nickel-phosphorus alloy coating thickness is 30～50 μ m, solution composition and technological parameter are: nickel sulfate hexahydrate 25～40g/L, inferior sodium phosphate 20～35g/L, compound complex agent (forming) 20～35g/L, pH=4.0～5.5 by citric acid, lactic acid, tartaric acid, malic acid, succinic acid, 80～95 ℃ of temperature, time 2～4h.
Adopt bipolar plates light weight, the heat conduction of this method preparation and conduct electricity very well, contact resistance is little and corrosion-resistant; Flow field handling ease, rate of finished products height and price are low.Corrosion resisting property is better than 316 stainless steels, the specific insulation of the bipolar plates that 3mm is thick is 8～10 μ Ω .cm, suitable with pure nickel (9.5 μ Ω .cm), be 316 stainless steels (70～8 μ Ω .cm) 1/10～1/7 and graphite cake (110～150 μ Ω .cm) 1/20～1/15.
Description of drawings:
Fig. 1 is the sem photograph of aluminium alloy bipolar plates after the embodiment of the invention 1 surface modification.
Embodiment
Provide three most preferred embodiments of the present invention below:
Embodiment 1
With 3mm thick aluminium alloy is basis material, adopts the computer carving method to prepare the flow field, and the width of flow path and the degree of depth are 0.5mm; Oil removing and acid-wash activation preliminary treatment make its no oil in surface and No oxided film; The employing secondary soaking zinc is handled, and zinc dipping solution is formed and technological parameter: NaOH 80g/L, white vitriol 30g/L, sodium fluoride 100g/L, anhydrous ferric trichloride 1g/L, 40 ℃ of temperature, time 120s; Move back zinc, nitric acid 500ml/L, 40 ℃ of temperature; Alkaline electroless plating nickel-phosphorus alloy, thickness are 0.5 μ m, solution composition and technological parameter: nickel sulfate hexahydrate 20g/L, inferior sodium phosphate 18g/L, citric acid 50g/L, pH=10,75 ℃ of temperature, time 3min; Acid chemical plating nickel-phosphorus alloy, thickness are 30 μ m, solution composition and technological parameter: nickel sulfate hexahydrate 25g/L, inferior sodium phosphate 1g/L, compound complex agent 20g/L, pH=5.5,80 ℃ of temperature, time 2h.The bipolar plates specific insulation of preparation is 8 μ Ω .cm, and structure and surface topography show as shown in Figure 1.As seen from Figure 1, the chemical plating nickel-phosphorus alloy layer amplifies 30000 times and just observes structure cell, and tiny structure cell makes coating present good corrosion resistance, and coating does not have micropore to prove the integrality of coating; These architectural features have determined to have excellent anti-oxidant, antilysis performance through the aluminium alloy bipolar plates after the chemical nickel plating surface modification, thereby have improved the reliability that electrically contacts.
Embodiment 2
The flow field width and the degree of depth are respectively 1.5mm; Zinc dipping solution is formed and technological parameter: NaOH 100g/L, white vitriol 50g/L, sodium fluoride 120g/L, anhydrous ferric trichloride 5g/L, 35 ℃ of temperature, time 60s; Alkalescence nickel preplating phosphorus alloy, thickness is 1.5 μ m, solution composition and technological parameter: nickel sulfate hexahydrate 30g/L, inferior sodium phosphate 28g/L, citric acid 50g/L, pH=9,65 ℃ of temperature, time 5min; Acidic nickel plating phosphorus alloy, thickness are 50 μ m, solution composition and technological parameter: nickel sulfate hexahydrate 40g/L, inferior sodium phosphate 35g/L, compound complex agent 35g/L, pH=4.0,95 ℃ of temperature, time 4h.Other is with embodiment 1.The bipolar plates specific insulation of preparation is 10 μ Ω .cm.
Embodiment 3
The flow field width and the degree of depth are respectively 1.0mm; Zinc dipping solution is formed and technological parameter: NaOH 90g/L, white vitriol 40g/L, sodium fluoride 110g/L, anhydrous ferric trichloride 3g/L, 38 ℃ of temperature, time 90s; Alkalescence nickel preplating phosphorus alloy, thickness is 1.0 μ m, solution composition and technological parameter: nickel sulfate hexahydrate 25g/L, inferior sodium phosphate 23g/L, citric acid 40g/L, pH=9.5,70 ℃ of temperature, time 4min; Acidic nickel plating phosphorus alloy, thickness are 40 μ m, solution composition and technological parameter: nickel sulfate hexahydrate 35g/L, inferior sodium phosphate 30g/L, compound complex agent 28g/L, pH=4.8,85 ℃ of temperature, time 3h.Other is with embodiment 1.The specific insulation of the bipolar plates of preparation is 9 μ Ω .cm.
Claims (2)
1. the preparation method of a bipolar plate for fuel cell is characterized in that with the aluminium alloy being basis material, adopts the computer carving method to prepare the flow field, adopts alkalescence and acid two solution system that aluminium alloy is carried out surface modification treatment; Specifically may further comprise the steps:
(1) with the aluminium alloy be basis material, adopt the computer carving method to prepare the flow field, the width of flow path and the degree of depth are 0.5～1.5mm;
(2) the alloy matrix aluminum material that will carve behind the flow field carries out oil removing and acid-wash activation preliminary treatment, makes its no oil in surface and No oxided film;
(3) pretreated alloy matrix aluminum material being soaked zinc handles, adopt secondary soaking zinc to handle the zinc-impregnating layer that can obtain even compact, solution composition and technological parameter are: NaOH 80～100g/L, white vitriol 30～50g/L, sodium fluoride 100～120g/L, anhydrous ferric trichloride 1～5g/L, 35～40 ℃ of temperature, time 30～120s; Dezincifying solution is formed and technological parameter is: nitric acid 500ml/L, 20～40 ℃ of temperature, move back use up till;
(4) will soak alloy matrix aluminum material chemical plating nickel-phosphorus alloy in alkaline solution that zinc is handled, thickness is 0.5～1.5 μ m, solution composition and technological parameter are: nickel sulfate hexahydrate 20～30g/L, inferior sodium phosphate 18～28g/L, citric acid 35～50g/L, pH=9～10,65～75 ℃ of temperature, time 3～5min;
(5) with alloy matrix aluminum material chemical plating nickel-phosphorus alloy in acid solution of alkaline nickel preplating phosphorus alloy, obtain surface modification aluminium alloy bipolar plates, nickel-phosphorus alloy thickness is 30～50 μ m, solution composition and technological parameter are: nickel sulfate hexahydrate 25～40g/L, inferior sodium phosphate 20～35g/L, compound complex agent 20～35g/L, pH=4.0～5.5,80～95 ℃ of temperature, time 2～4h;
2. the preparation method of a kind of bipolar plate for fuel cell according to claim 1 is characterized in that the compound complex agent in the step (5) is made up of citric acid, lactic acid, tartaric acid, malic acid, succinic acid.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100144559A CN100492736C (en) | 2007-05-23 | 2007-05-23 | Process of producing double pole plates for fuel cell |
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| CNB2007100144559A CN100492736C (en) | 2007-05-23 | 2007-05-23 | Process of producing double pole plates for fuel cell |
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| CN100492736C true CN100492736C (en) | 2009-05-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668134A (en) * | 2013-09-18 | 2014-03-26 | 沈阳工业大学 | Diacid complexing agent method for chemically plating nickel on carbon fiber surface |
| CN104167555A (en) * | 2014-07-17 | 2014-11-26 | 北京锦源创新科技有限公司 | Bipolar plate used for fuel cell and making method thereof |
| CN104213107A (en) * | 2014-09-19 | 2014-12-17 | 广西师范大学 | Zinc dipping solution for aluminum or aluminum alloy and preparing method and zinc dipping technology therefore |
| CN105002484B (en) * | 2015-07-17 | 2017-10-03 | 中原内配集团股份有限公司 | Cylinder jacket chemical Ni-P Composite Coatings processing method |
| CN107675146B (en) * | 2017-08-23 | 2019-07-19 | 安徽省力霸动力锂电池科技有限公司 | A kind of lithium battery aluminium pole ears nickel plating technology |
| TWI686990B (en) * | 2018-12-28 | 2020-03-01 | 財團法人工業技術研究院 | Bipolar plate for fuel cell and method of the same |
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