CN111748324A - Antifreeze fluid for metal bipolar plate fuel cell, preparation method and application - Google Patents
Antifreeze fluid for metal bipolar plate fuel cell, preparation method and application Download PDFInfo
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- CN111748324A CN111748324A CN202010652199.1A CN202010652199A CN111748324A CN 111748324 A CN111748324 A CN 111748324A CN 202010652199 A CN202010652199 A CN 202010652199A CN 111748324 A CN111748324 A CN 111748324A
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- Prior art keywords
- bipolar plate
- metal bipolar
- fuel cell
- antifreeze
- antifreeze solution
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
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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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- Combustion & Propulsion (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention belongs to the technical field of fuel cells, and discloses antifreeze fluid for a metal bipolar plate fuel cell, a preparation method and application thereof, wherein the antifreeze fluid for the metal bipolar plate fuel cell consists of 30-80 wt% of alcohol, 0.02-1 wt% of polyalcohol and the balance of deionized water. The alcohol is one of ethylene glycol, propylene glycol, glycerol and butanediol. The polyalcohol forms a protective film under the potential action of the metal bipolar plate, so that the metal bipolar plate is not corroded. The invention adopts the negative polarity of the polyalcohol in the solution to form a protective film under the potential action of the metal bipolar plate, thereby preventing the metal bipolar plate from being corroded. In addition, the polyalcohol has good solubility in the antifreeze and does not cause the conductivity of the antifreeze to be increased.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to antifreeze solution for a metal bipolar plate fuel cell, a preparation method and application.
Background
Currently, a fuel cell is a device that generates electricity using hydrogen energy. Since waste heat is generated during power generation, a coolant is required to cool the fuel cell. The in-industry coolants are also known as antifreeze. Fuel cells can be classified into graphite bipolar plates and metal bipolar plate fuel cells. The metal bipolar plate fuel cell has the advantages of small volume, high power density, quick start and the like, and is increasingly becoming a development trend of the fuel cell. However, metal bipolar plates are susceptible to corrosion as electrodes (similar to the anode corrosion of an electrolytic cell) under the potential of an electric fuel cell, and thus are more susceptible to corrosion than graphite bipolar plates. The rate of corrosion under the influence of an electric potential is often related to the solution in which it is placed. The solution with low conductivity and capable of slowly releasing metal corrosion can greatly reduce the corrosion rate of the metal bipolar plate.
Through the above analysis, the problems and defects of the prior art are as follows: (1) the metal bipolar plate has no stability of a graphite bipolar plate, and an antifreezing solution specially aiming at the metal bipolar plate fuel cell is needed to prevent the metal bipolar plate from being corroded.
(2) It is difficult to ensure the effect of the antifreeze and simultaneously ensure low conductivity.
The difficulty in solving the above problems and defects is: a compound is selected which prevents corrosion of the metal still under the potential difference of the electrodes and which in the antifreeze solution itself cannot dissociate to increase the conductivity.
The significance of solving the problems and the defects is as follows: the invention adopts the negative polarity of the polyalcohol in the solution to form a protective film under the potential action of the metal bipolar plate, thereby preventing the metal bipolar plate from being corroded. The antifreeze solution has improved long-term stability, and is suitable for antifreeze solution (coolant) of fuel cells, especially fuel cells of metal bipolar plates.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an antifreeze solution for a metal bipolar plate fuel cell, a preparation method and application thereof. Relates to the composition of a fuel cell antifreeze solution, in particular to a metal bipolar plate fuel cell antifreeze solution; in particular to an antifreeze for fuel cell vehicles.
The invention is realized in such a way that the antifreeze solution for the metal bipolar plate fuel cell comprises the following components in percentage by weight: 30-80 wt% of alcohol, 0.02-1 wt% of additive and the balance of deionized water.
Further, the additive is a polyol; the antifreeze solution comprises the following components: 40-70 wt% of alcohol and 0.1-0.5 wt% of polyalcohol; and the balance: deionized water.
Further, the additive of the invention can comprise one or a mixture of more than two of pH regulator, dye, defoaming agent and corrosion inhibitor.
The pH adjuster may comprise an alkali metal hydroxide, preferably potassium hydroxide or sodium hydroxide.
Further, the present invention provides an antifreeze for a metal bipolar plate fuel cell comprising polyols, said antifreeze comprising: (a) alcohol, and the concentration of the alcohol can be adjusted according to the requirement of the temperature of the use environment. (b) Deionized water, (c) a polyol.
Further, the alcohol includes ethylene glycol, propylene glycol, glycerin, butylene glycol.
The polyalcohol forms a protective film under the potential action of the metal bipolar plate, so that the metal bipolar plate is not corroded.
The antifreezing solution has the antifreezing temperature below-30 ℃ and the conductivity below 10 mu S/cm.
The invention also aims to provide a preparation method of the antifreeze solution for the metal bipolar plate fuel cell.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention adopts the negative polarity of the polyalcohol in the solution to form a protective film under the potential action of the metal bipolar plate, thereby preventing the metal bipolar plate from being corroded. In addition, the polyalcohol has good solubility in the antifreeze and does not cause the conductivity of the antifreeze to be increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
FIG. 1 is a diagram of an experimental apparatus provided in an embodiment of the present invention. In order to simulate the actual fuel cell bipolar plate situation, the distance between the two ends of the electrode was adjusted to 1.5 mm.
FIG. 2 is a graph showing the comparison of the experimental effects of the examples of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides an antifreeze solution for a metal bipolar plate fuel cell, a preparation method and application thereof, and the invention is described in detail below with reference to the accompanying drawings.
The invention provides an antifreeze fluid for a metal bipolar plate fuel cell, which comprises the following components in percentage by weight: 30-80 wt% of alcohol, 0.02-1 wt% of additive (polyalcohol) and the balance of deionized water.
The antifreeze solution comprises the following components: 40-70 wt% of alcohol and 0.1-0.5 wt% of additive; and the balance: deionized water.
In the present invention, the additives may include a pH adjuster, a dye, a defoaming agent, and a corrosion inhibitor. The pH adjuster may comprise an alkali metal hydroxide, preferably potassium hydroxide or sodium hydroxide.
In the present invention, the antifreeze solution for a metal bipolar plate fuel cell containing a polyalcohol comprises: (a) alcohol, and the concentration of the alcohol can be adjusted according to the requirement of the temperature of the use environment. (b) Deionized water, (c) a polyol.
The alcohol comprises ethylene glycol, propylene glycol, glycerol, and butanediol.
The polyalcohol forms a protective film under the potential action of the metal bipolar plate, so that the metal bipolar plate is not corroded.
The antifreezing solution has the antifreezing temperature below-30 ℃ and the conductivity below 10 mu S/cm.
The present invention is further described below with reference to specific application examples.
Example 1
FIG. 1 is a diagram of an experimental apparatus provided in an embodiment of the present invention. In order to simulate the actual fuel cell bipolar plate situation, the distance between the two ends of the electrode was adjusted to 1.5 mm.
The antifreeze solution for the fuel cell comprises the following components in percentage by weight: 50 wt% of ethylene glycol and 0.1 wt% of polyalcohol; and the balance: deionized water. Adding a small amount of ethylene glycol/water mixture with the mass fraction of 1:1 into a reaction kettle, then adding polyalcohol, stirring for 30min by using a magnetic stirrer (the set temperature is 60 ℃), completely dissolving, and cooling to obtain the antifreeze solution for the fuel cell of the embodiment of the invention. Testing the conductivity by using a conductivity meter; testing the pH with a pH meter; 2 stainless steel sheets of 2x4cm with electrodes (potential difference 1.5V) attached were immersed in the antifreeze solution for fuel cells of the present invention and placed in an oven at 70 ℃. At intervals, conductivity was retested using the conductivity meter.
Comparative example
Blank ethylene glycol.
Putting pure ethylene glycol into a beaker, and then adding 50 wt% of deionized water; thus obtaining the blank antifreeze of the comparative example 5. Testing the conductivity by using a conductivity meter; testing the pH with a pH meter; 2 stainless steel sheets of 2x4cm with electrodes (potential difference 1.5V) attached were immersed in the antifreeze solution for fuel cells of the present invention and placed in an oven at 70 ℃. At intervals, conductivity was retested using the conductivity meter.
FIG. 2 is a graph showing the comparison of the experimental effects of the examples of the present invention. As shown in the figure, the anti-freezing solution added with the polyalcohol additive has lower conductivity than the blank solution after being subjected to electrochemical corrosion for a long time under the same condition. The polyalcohol plays a role in protecting electrochemical corrosion of metals, slowly releases corrosion of the metals, ensures that the antifreeze is in a low-conductivity state for a long time, and is more suitable for application scenes of metal bipolar plates.
Example 2
The antifreeze solution for the metal bipolar plate fuel cell comprises the following components in percentage by weight: 80 wt% of alcohol, 1 wt% of polyalcohol and the balance of deionized water.
Example 3
The antifreeze solution for the metal bipolar plate fuel cell comprises the following components in percentage by weight: 30 wt% of alcohol, 0.02 wt% of polyalcohol and the balance of deionized water.
Example 4
The antifreeze solution for the metal bipolar plate fuel cell comprises the following components in percentage by weight: 55 wt% of alcohol, 0.06 wt% of polyalcohol and the balance of deionized water.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The antifreeze solution for the metal bipolar plate fuel cell is characterized by comprising 30-80 wt% of alcohol, 0.02-1 wt% of additive and the balance of deionized water.
2. The antifreeze solution for metal bipolar plate fuel cells according to claim 1, wherein said alcohol is one of ethylene glycol, propylene glycol, glycerin, and butylene glycol.
3. The antifreeze solution for a fuel cell with a metallic bipolar plate according to claim 1, wherein said additive is a polyol which forms a protective film under the potential of the metallic bipolar plate to protect the metallic bipolar plate from corrosion; the antifreeze solution for the metal bipolar plate fuel cell consists of 40-70 wt% of alcohol, 0.1-0.5 wt% of polyalcohol and the balance of deionized water.
4. The antifreeze fluid for metal bipolar plate fuel cells according to claim 1, wherein said additive comprises one or a mixture of two or more of a pH adjuster, a dye, an antifoaming agent, and a corrosion inhibitor.
5. The metal bipolar plate fuel cell antifreeze solution of claim 4, wherein said pH adjusting agent comprises an alkali metal hydroxide.
6. A method for preparing the antifreeze solution for metal bipolar plate fuel cell as set forth in any claim 1 to 5,
7. an antifreeze solution preparation device for preparing the antifreeze solution for the metal bipolar plate fuel cell according to any one of claims 1 to 5.
8. A metal bipolar plate fuel cell assembled by the antifreeze solution for metal bipolar plate fuel cells according to any claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010652199.1A CN111748324A (en) | 2020-07-08 | 2020-07-08 | Antifreeze fluid for metal bipolar plate fuel cell, preparation method and application |
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| CN202010652199.1A CN111748324A (en) | 2020-07-08 | 2020-07-08 | Antifreeze fluid for metal bipolar plate fuel cell, preparation method and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114551936A (en) * | 2022-01-18 | 2022-05-27 | 上海神力科技有限公司 | Anti-freezing solution testing device and method for bipolar plate of fuel cell |
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Application publication date: 20201009 |