Preparation method for graphene/stannic oxide sandwich-structured thin film on surface of aluminium alloy bipolar plate

A tin dioxide and bipolar plate technology, applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problems of stainless steel corrosion resistance not greatly improved, harsh preparation conditions, etc., to achieve good corrosion resistance , the preparation process is simple, the effect of excellent corrosion resistance

Active Publication Date: 2017-11-03
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The corrosion resistance of stainless steel modified by this method has not been greatly improved, and the corrosion current density of bare stainless steel is 11.76 μA cm -2 , the modified corrosion current density is only 7μA cm -2 , the corrosion inhibition efficiency is only 40.48%, and the preparation conditions of this method are extremely harsh, requiring extremely high voltage and high temperature

Method used

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  • Preparation method for graphene/stannic oxide sandwich-structured thin film on surface of aluminium alloy bipolar plate
  • Preparation method for graphene/stannic oxide sandwich-structured thin film on surface of aluminium alloy bipolar plate
  • Preparation method for graphene/stannic oxide sandwich-structured thin film on surface of aluminium alloy bipolar plate

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Embodiment 1

[0048] A method for preparing a graphene / tin dioxide sandwich film on the surface of an aluminum alloy bipolar plate, comprising the steps of:

[0049] (1) Preparation of etching solution

[0050] Prepare a NaOH solution with a concentration of 1M as an etching solution;

[0051] (2), the preparation of PDDA aqueous solution

[0052] Configure a PDDA aqueous solution with a volume ratio of 1% for self-assembly;

[0053] (3), preparation of graphene oxide aqueous solution

[0054] Configuration mass fraction is the graphene oxide aqueous solution of 1wt%, is used for self-assembly;

[0055] (4) Preparation of hydrothermal precursor solution

[0056] According to the volume ratio of deionized water and absolute ethanol is 3:1, mix 30mL deionized water and 10mL absolute ethanol respectively, then add 0.15g of stannous chloride dihydrate, mix well, adjust the solution with 1M NaOH The pH=9~10;

[0057] (5), pretreatment of aluminum alloy

[0058] 5 pieces (1, 2, 3, 4, 5) of...

Embodiment 2

[0068] In this embodiment, a method for preparing a graphene / tin dioxide sandwich structure film on the surface of an aluminum alloy bipolar plate specifically includes the following steps:

[0069] (1) Preparation of etching solution

[0070] Prepare a NaOH solution with a concentration of 1M as an etching solution;

[0071] (2), the preparation of PDDA aqueous solution

[0072] Configure a PDDA aqueous solution with a volume ratio of 1% for self-assembly;

[0073] (3), preparation of graphene oxide aqueous solution

[0074] Configuration mass fraction is the graphene oxide aqueous solution of 1wt%, is used for self-assembly;

[0075] (4) Preparation of hydrothermal precursor solution

[0076] According to the volume ratio of deionized water and absolute ethanol as 1:3, mix 10mL deionized water and 30mL absolute ethanol respectively, then add 0.15g of stannous chloride dihydrate, mix well, adjust the solution with 1M NaOH The pH=9~10;

[0077] (5), pretreatment of alumi...

Embodiment 3

[0086] In this embodiment, a method for preparing a graphene / tin dioxide sandwich structure film on the surface of an aluminum alloy bipolar plate specifically includes the following steps:

[0087] (1) Preparation of etching solution

[0088] Prepare a NaOH solution with a concentration of 1M as an etching solution;

[0089] (2), the preparation of PDDA aqueous solution

[0090] Configure a PDDA aqueous solution with a volume ratio of 1% for self-assembly;

[0091] (3), preparation of graphene oxide aqueous solution

[0092] Configuration mass fraction is the graphene oxide aqueous solution of 1wt%, is used for self-assembly;

[0093] (4) Preparation of hydrothermal precursor solution

[0094] According to the volume ratio of deionized water and absolute ethanol is 3:1, mix 30mL deionized water and 10mL absolute ethanol respectively, then add 0.15g of stannous chloride dihydrate, mix well, adjust the solution with 1M NaOH The pH=9~10;

[0095] (5), pretreatment of alumi...

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Abstract

The invention relates to a preparation method for a graphene / stannic oxide sandwich-structured thin film on the surface of an aluminium alloy bipolar plate. The preparation method comprises the following steps of (1) mixing deionized water and absolute ethyl alcohol, adding stannous chloride dihydrate and regulating pH to 9-10 to obtain a hydrothermal precursor solution; (2) putting the pre-processed aluminium alloy bipolar plate into a NaOH solution, performing chemical etching, cleaning and drying; (3) performing cyclic self-assembling on the chemically-etched aluminium alloy bipolar plate in a PDDA water solution and a graphene oxide water solution for one or more times alternately, and then taking out and cleaning and drying; and (4) putting the aluminium alloy bipolar plate self-assembled in the step (3) into the prepared hydrothermal precursor solution prepared in the step (1) to perform a hydrothermal reaction, and then cleaning and drying to complete the preparation process. Compared with the prior art, simple operation, low cost, good etching effect and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a method for preparing a graphene / tin dioxide sandwich structure film on the surface of an aluminum alloy bipolar plate. Background technique [0002] With the continuous development and progress of society, problems such as energy depletion and environmental pollution also follow. Today in the 21st century, people are increasingly aware of the seriousness of a series of problems caused by human development. Today, the reserves of petrochemical energy are getting less and less, and the development of renewable clean and pollution-free energy has attracted worldwide attention. Fuel cells are one of the crystallizations of human wisdom. Among them, proton exchange membrane fuel cell (PEMFC, also known as polymer electrolyte membrane fuel cell) is the latest generation of fuel cell, which mainly uses the chemical energy generated by the reaction of hydro...

Claims

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Application Information

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IPC IPC(8): H01M8/0228H01M8/0213
CPCH01M8/0213H01M8/0228Y02E60/50
Inventor 徐群杰杨灵慧万云霄秦真兰田宇强闵宇霖范金辰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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