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Preparation method of metal bipolar plate surface coating of proton exchange membrane fuel cell

A technology of metal bipolar plates and proton exchange membranes, which is applied to fuel cell parts, battery electrodes, circuits, etc., can solve the problems of no explanation or report, no data collected, etc., and achieve low cost and high corrosion resistance performance and low contact resistance

Inactive Publication Date: 2010-06-23
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

Method used

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  • Preparation method of metal bipolar plate surface coating of proton exchange membrane fuel cell
  • Preparation method of metal bipolar plate surface coating of proton exchange membrane fuel cell
  • Preparation method of metal bipolar plate surface coating of proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of SnO by Spray Pyrolysis 2 :F conductive coating (FTO), because this method has the lowest cost compared with other methods.

[0049] Its specific implementation method comprises the following steps:

[0050] 1) Preparation of coating solution;

[0051] SnCl 2 ·xH 2 O. Hydrofluoric acid or ammonium fluoride, methanol or ethanol or isopropanol, deionized water, and hydrochloric acid are formulated into a coating solution according to the ratio in Table 2, and stirred at 70-90°C for 10-20 minutes.

[0052] Table 2

[0053]

[0054] SnCl 2 ·xH 2 O is used to make SnO 2 Coating precursor solution, hydrofluoric acid (concentration 40%) is used as doping material, and water in solution provides oxygen for chemical reaction. In addition, a little HCl (concentration 36%) can be added to improve the SnCl 2 Solubility of the solution. Considering the composition of the coating, the SnCl in the precursor solution 2 :HF=1:1.0-1.2 is more preferable. In a...

Embodiment 2

[0063] Preparation of SnO by Spray Pyrolysis 2 : (F+Sb) conductive coating, the method comprises the steps:

[0064] 1) Preparation of coating solution;

[0065] SnCl 2 2H 2 O was mixed with absolute ethanol or methanol or isopropanol and deionized water in a molar ratio of 1:20:20, stirred at 60-80°C until clear, then added the ethanol solution of SbCl3 and trifluoroacetic acid, and continued to stir for 2h, A transparent and clear sol was obtained. The doping amounts of Sb and F are respectively 0-5% and 40-60% (molar ratio).

[0066] 2) The preparation of the metal bipolar plate is the same as step 2) of Example 1.

[0067] 3) The process of spraying, pyrolytic conductive coating preparation and post-treatment is the same as step 3) of embodiment 1.

Embodiment 3

[0069] Preparation of SnO by Sputtering 2 :F conductive coating (FTO). Although the cost of this method is higher than the spray pyrolysis method, it has certain technical advantages in the preparation of large-scale samples and mass production. The method comprises the steps of:

[0070] 1) Preparation of coating solution

[0071] The sputtering target source can use x%Sn-(100-x-y)%SnF 2 -y%MO, x%SnO can also be used 2 -(100-x-y)%SnF 2 -y%MO. Determine the values ​​of x and y in the target source through experiments to obtain the coating with the element content in Table 1. Target source preparation further includes the following steps:

[0072] ①Sn-SnF 2 -MO target source preparation

[0073] Metal Sn powder, SnF 2 After co-melting with other dopant powder at 240°C, pour it into the mold to make x%Sn-(100-x-y)%SnF 2 -y% MO target source.

[0074] ②SnO 2 -SnF 2 -MO target source preparation, including the following methods:

[0075] Method 1: Add x%SnO 2 -(100...

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Abstract

The invention discloses a preparation method of metal bipolar plate surface coating of proton exchange membrane fuel cell, wherein the bipolar plate is made of low-cost iron series, nickel series metallic materials; stannic oxide (SnO2) or tin indium oxide (ITO) or tin cadmium oxide (CTO) doped with fluorine (F) or stibium (Sb) is used, and metallic oxide doped with little tungsten, zirconium, cerium, titanium, yttrium, silver, vanadium, bismuth, neodymium is used as coating. The invention discloses a technology for preparing the coating with spray pyrolysis and sputtering methods, comprising coating solution preparation, metal bipolar plate preparation, and spray painting, pyrolysis conductive coating preparation and post treatment. The invention solves the problems of proton exchange membrane fuel cell since the metal bipolar plate has too high cost, thereby having the advantages of high corrosion resistance, low contact resistance, electric conduction, low cost, and the like.

Description

technical field [0001] The invention relates to a preparation method of a fuel cell, in particular to a preparation method of a metal bipolar plate surface coating of a proton exchange membrane fuel cell. Background technique [0002] The new high-efficiency clean energy technology represented by hydrogen energy has gradually become the trend of choice for the survival and development of human society. Fuel cell technology is an efficient and environmentally friendly energy conversion method based on hydrogen energy. Its application prospects are extremely broad, including vehicles, distributed power stations, UPS, mobile power and portable power and many other fields. Among them, the proton exchange membrane (PEM) fuel cell has become a clean energy technology that countries around the world are focusing on developing due to its advantages such as low operating temperature, fast start-up, stability, long life, and application of various fuels. [0003] The bipolar plate i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/88
CPCY02E60/50
Inventor 王涛王东张伟刘向张新荣胡纯孙毅
Owner SHANGHAI INST OF SPACE POWER SOURCES
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