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Method for modifiying aluminium alloy bipolar plate used for proton exchange membrane fuel cell by boron nitride nano sheet

A proton exchange membrane and fuel cell technology, applied in solid electrolyte fuel cells, fuel cells, nanotechnology, etc., can solve the problems of large chemical reagent preparation process, power consumption, environmental pollution, etc., achieve excellent corrosion resistance, improve corrosion resistance Corrosion performance, the effect of simple preparation process

Active Publication Date: 2017-10-17
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent with the application number 201610223097.1 discloses a method for surface modification of stainless steel bipolar plates of proton exchange membrane fuel cells, which requires a large amount of HNO for the modified bipolar plates 3 , HCl, HF and other strong acids and requires electrochemical polarization, which pollutes the environment and consumes electric energy
The application number is 200710014455.9 Chinese Invention Patent, which discloses a method for preparing bipolar plates for fuel cells. The surface of the aluminum alloy bipolar plates is modified by electroless nickel-phosphorus alloy plating in an alkaline and acidic dual solution system, but the method not only To use a large number of toxic and harmful chemical reagents and the preparation process is extremely complicated

Method used

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  • Method for modifiying aluminium alloy bipolar plate used for proton exchange membrane fuel cell by boron nitride nano sheet
  • Method for modifiying aluminium alloy bipolar plate used for proton exchange membrane fuel cell by boron nitride nano sheet
  • Method for modifiying aluminium alloy bipolar plate used for proton exchange membrane fuel cell by boron nitride nano sheet

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Embodiment 1

[0043] A boron nitride (BN) nanosheet modified proton exchange membrane fuel cell (PEMFC) aluminum alloy bipolar plate, comprising the steps of:

[0044] (1) Aluminum alloy surface pretreatment: Two pieces of aluminum alloy 5052 (①, ②) are polished by 1#, 3#, 6# metallographic sandpaper in turn. Put the ② sample at V 乙醇 :V HClO4 =4:1 in the solution (volume ratio), the electrochemical polishing time is 3min with a voltage of 20V, and the solution temperature is controlled at 3°C.

[0045] (2) Anodizing treatment: oxidize the ② sample treated in (1) at a phosphoric acid concentration of 0.2M at a voltage of 30V for 40min, and control the solution temperature at 50°C.

[0046] (3) see figure 1 As shown, the preparation process of BN nanosheets is: first prepare 0.5g / L polybenzimidazole (OPBI) dimethyl sulfoxide (DMSO) solution, and then add a certain amount of hexagonal boron nitride powder to a certain volume of OPBI The DMSO solution (the content of BN is 0.5mg / ml) was ult...

Embodiment 2

[0057] A boron nitride (BN) nanosheet modified proton exchange membrane fuel cell (PEMFC) aluminum alloy bipolar plate, comprising the steps of:

[0058] (1) Aluminum alloy surface pretreatment: Two pieces of aluminum alloy 6061 (①, ②) are polished by 1#, 3#, 6# metallographic sandpaper in turn. Put the ② sample at V 乙醇 :V HClO4 =4:1 in the solution (volume ratio), the electrochemical polishing time is 3min with a voltage of 20V, and the solution temperature is controlled at 3°C.

[0059] (2) Anodizing treatment: oxidize the ② sample treated in (1) at a phosphoric acid concentration of 0.2M at a voltage of 30V for 40min, and control the solution temperature at 50°C.

[0060] (3) The preparation process of BN nanosheets is as follows: first prepare 0.5g / L polybenzimidazole (OPBI) dimethyl sulfoxide (DMSO) solution, and then add a certain amount of hexagonal boron nitride powder to a certain volume of OPBI The DMSO solution (the content of BN is 0.5mg / ml) was ultrasonically s...

Embodiment 3

[0067] A boron nitride (BN) nanosheet modified proton exchange membrane fuel cell (PEMFC) aluminum alloy bipolar plate, comprising the steps of:

[0068] (1) Aluminum alloy surface pretreatment: Two pieces of aluminum alloy 5052 (①, ②) are polished by 1#, 3#, 6# metallographic sandpaper in turn. Put the ② sample at V 乙醇 :V HClO4 =4:1 in the solution (volume ratio), the electrochemical polishing time is 3min with a voltage of 20V, and the solution temperature is controlled at 3°C.

[0069] (2) Anodizing treatment: The ② sample treated in (1) was oxidized at a concentration of 0.2M phosphoric acid at a voltage of 30V for 10 minutes, and the temperature of the solution was controlled at 50°C.

[0070] (3) The preparation process of BN nanosheets is as follows: first prepare 0.5g / L polybenzimidazole (OPBI) dimethyl sulfoxide (DMSO) solution, and then add a certain amount of hexagonal boron nitride powder to a certain volume of OPBI The DMSO solution (the content of BN is 0.5mg / ...

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Abstract

The invention relates to a method for modifiying an aluminium alloy bipolar plate used for a proton exchange membrane fuel cell by a boron nitride nano sheet. The method comprises the following steps: 1) placing a pre-treated aluminium alloy matrix in an aqueous solution, performing anodization; 2) taking a NMP solution of PVDF, adding the BN nano sheet, uniformly mixing the materials to obtain ternary mixed treatment fluid; and 3) coating the surface of the aluminium alloy matrix after anodization with the ternary mixed treatment fluid obtained in the step 2), drying the material, and calcining the product for completing the modification. Compared with the prior art, the corrosion resistant performance of the aluminium alloy bipolar plate in a PEMFC simulation solution can be greatly increased, the cost is low, the operation is simple, and the industrial batch production can be realized.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a method for modifying boron nitride nanosheets to modify aluminum alloy bipolar plates for proton exchange membrane fuel cells. Background technique [0002] Energy is the driving force of national economic development and the source of social existence. Sustainable and safe energy supply is a major strategic issue related to national economy, people's livelihood and even national security. However, with the continuous development and progress of society, the demand for energy is increasing, and the traditional energy system can no longer meet the future needs for high efficiency, cleanliness, economy and safety. Therefore, it is imminent to develop new clean green energy. The proton exchange membrane fuel cell (PEMFC) uses hydrogen or purified reformed gas as fuel and air or pure oxygen as oxidant. Noise, can work continuously, and also has the adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0245H01M8/0232H01M8/0234H01M8/10B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M8/0232H01M8/0234H01M8/0245H01M8/10H01M2008/1095Y02E60/50Y02P70/50
Inventor 徐群杰万云霄裘波秦真兰杨灵慧闵宇霖范金辰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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