Preparation method of composite material bipolar plate of proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, fuel cell parts, battery electrodes, etc., can solve the problem of high cost, improve performance and life, reduce cost, corrosion resistance and conductivity are not affected effect of influence

Active Publication Date: 2011-09-14
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that all parts are silver-plated and the cost is higher

Method used

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  • Preparation method of composite material bipolar plate of proton exchange membrane fuel cell
  • Preparation method of composite material bipolar plate of proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Paste the polyimide film with flow field-shaped through holes on the surface of the 904L stainless steel bipolar plate. The flow field is strip-shaped, the flow channel width is 2.0mm, and the flow field width is 2.0mm.

[0019] First, the stainless steel plate is activated cathodically, the activation solution is 200ml / L sulfuric acid (98%), and it is treated at 20°C for 3min, and the current density is 0.5A / dm 2 .

[0020] Copper plating after DI water cleaning. The copper plating solution is composed of CuSO 4 200g / L, H 2 SO 4 80g / L; temperature 25℃, current density 2.0A / dm 2 , time 5min.

[0021] Electroless silver plating after cleaning with deionized water, the composition of the electroless silver plating solution is Na 2 SO 3 150g / L, AgNO 3 1.0g / L; the electroless plating temperature is 25°C, and the time is 30s.

[0022] Electroformed silver / carbon composite layer after deionized water cleaning. The composite plating solution group includes nicoti...

Embodiment 2

[0025] Paste the polyimide film with flow field-shaped through holes on the surface of the 316L stainless steel bipolar plate, the flow field is serpentine, the flow channel width is 1.0 mm, and the flow field width is 1.0 mm.

[0026] First, the stainless steel plate is activated cathodically, the activation solution is 200ml / L sulfuric acid (98%), and it is treated at 20°C for 3min, and the current density is 0.5A / dm 2 .

[0027] Copper plating after DI water cleaning. The copper plating solution is composed of CuSO 4 200g / L, H 2 SO 4 80g / L; temperature 25℃, current density 2.0A / dm 2 , time 5min.

[0028] Electroless silver plating after cleaning with deionized water, the composition of the electroless silver plating solution is Na 2 SO 3 150g / L, AgNO 3 1.0g / L; the electroless plating temperature is 25°C, and the time is 30s.

[0029] Electroformed silver / carbon composite layer after deionized water cleaning. The composite plating solution group includes nicoti...

Embodiment 3

[0032] Paste the polycarbonate film with flow field-shaped through holes on the surface of the titanium alloy (TC4) bipolar plate, the flow field is strip-shaped, the flow channel width is 2.0 mm, and the flow field width is 2.0 mm.

[0033] First, the stainless steel plate is activated cathodically, the activation solution is 200ml / L sulfuric acid (98%), and it is treated at 20°C for 3min, and the current density is 0.5A / dm 2 .

[0034] Copper plating after DI water cleaning. The copper plating solution is composed of CuSO 4 200g / L, H 2 SO 4 80g / L; temperature 25℃, current density 2.0A / dm 2 , time 5min.

[0035] Electroless silver plating after cleaning with deionized water, the composition of the electroless silver plating solution is Na 2 SO 3 150g / L, AgNO 3 1.0g / L; the electroless plating temperature is 25°C, and the time is 30s.

[0036] Electroformed silver / carbon composite layer after deionized water cleaning. The composite plating solution group includes ...

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Abstract

The invention discloses a preparation method of a composite material bipolar plate of a proton exchange membrane fuel cell. The composite material bipolar plate comprises a metal basal plate and an air distribution flow field positioned on the metal basal plate and is characterized in that the air distribution flow field is directly precipitated on the metal basal plate by a precipitation method.The invention can obviously reduce the thickness and the weight of the composite material bipolar plate by preparing the composite material bipolar plate by the method, thereby enhancing the weight ratio power and the volume ratio power of the proton exchange membrane fuel cell; in addition, the composite material bipolar plate has the advantages of low material cost, corrosion resistance, good conductivity and very large scale application potentiality.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a method for preparing bipolar plates of proton exchange membrane fuel cell composite materials. Background technique [0002] The stainless steel bipolar plate of the proton exchange membrane fuel cell is a kind of bipolar plate commonly used, and stainless steel is used as the bipolar plate, and the surface modification treatment of the stainless steel bipolar plate is generally required, such as the patented technology of CN101222053, which involves a The invention discloses a method for modifying the surface of a stainless steel bipolar plate of a proton exchange membrane fuel cell. The method requires electroplating pure silver on all surface parts of the stainless steel bipolar plate. This method only prepares flat bipolar plates, and additional flow fields are required. The disadvantage of this method is that all parts are silver-plated and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M8/02H01M8/0206H01M8/0213H01M8/0228H01M8/0258
CPCY02E60/50
Inventor 付宇徐洪峰侯中军吕萍明平文
Owner SUNRISE POWER CO LTD
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