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Method for preparing phosphoric acid doped high temperature proton exchange membrane with layer-by-layer assembly structure based on spin coating technique

A proton exchange membrane, layer-by-layer assembly technology, used in fuel cells, electrochemical generators, electrical components, etc., can solve problems such as weak interfacial force, achieve improved ability, good proton conductivity, and be conducive to proton conduction. Effect

Inactive Publication Date: 2018-07-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many reports on the use of Kevlar nanofibers to make bulletproof materials in the world, and most of the research focuses on the modification of Kevlar. However, due to the weak interface force between Kevlar nanofibers and polymers, based There are few studies on the preparation of polymer membrane electrolytes by Kevlar nanofibers, and there is no report on the application of Kevlar nanofibers and nanomaterials to prepare membrane electrolytes for high-temperature proton exchange membrane batteries.

Method used

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  • Method for preparing phosphoric acid doped high temperature proton exchange membrane with layer-by-layer assembly structure based on spin coating technique
  • Method for preparing phosphoric acid doped high temperature proton exchange membrane with layer-by-layer assembly structure based on spin coating technique
  • Method for preparing phosphoric acid doped high temperature proton exchange membrane with layer-by-layer assembly structure based on spin coating technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 500ml of dimethyl sulfoxide, 5g of Kevlar nanofibers, and 3g of potassium hydroxide to a 1000ml stoppered reagent bottle, and stir for 5-7 days to form a homogeneous Kevlar nanofiber with a concentration of 10g / L solution.

[0033] (2) At 20-35°C, drop 5ml of Kevlar nanometer on the glass slide treated with piranha solution (concentrated sulfuric acid with a concentration of 98wt% and a concentration of 30wt% hydrogen peroxide in a volume ratio of 7:3) Fiber homogeneous solution, after spin coating for 20 seconds at a speed of 1500 rpm on a spin coater, soak the glass piece in deionized water for 5-10 seconds.

[0034] (3) At 20-35°C, drop 1ml of cadmium telluride aqueous solution on the glass sheet, bake in 80°C oven for 4 hours, add 4ml of cadmium telluride aqueous solution again, and continue to bake in 80°C oven for 4 hours.

[0035] (4) At 20-35° C., 2 ml of phosphoric acid solution with a concentration of 85% was added dropwise on the glass slide, and spi...

Embodiment 2

[0041] (1) Add 450ml of dimethyl sulfoxide, 4g of Kevlar nanofibers, and 2g of potassium hydroxide to a 1000ml stoppered reagent bottle, and stir for 5-7 days to form a homogeneous Kevlar nanofiber with a concentration of 9g / L solution.

[0042] (2) At 20-35°C, add 6ml of Kevlar nanometer dropwise on the glass slide treated with piranha solution (concentrated sulfuric acid with a concentration of 98wt% and a concentration of 30wt% hydrogen peroxide in a volume ratio of 7:3) Fiber homogeneous solution, after spin-coating on a spin-coater at a speed of 1000 rpm for 15 seconds, soak the glass piece in deionized water for 5-10 seconds.

[0043] (3) At 20-35°C, drop 1ml of cadmium telluride aqueous solution on the glass sheet, bake in a 75°C oven for 4 hours, add 4ml of cadmium telluride aqueous solution again, and continue to bake in a 75°C oven for 4 hours.

[0044] (4) At 20-35° C., drop 2 ml of phosphoric acid solution with a concentration of 85% on the glass slide, and spin-c...

Embodiment 3

[0050] (1) Add 550ml of dimethyl sulfoxide, 6g of Kevlar nanofibers, and 4g of potassium hydroxide to a 1000ml stoppered reagent bottle, and stir for 5-7 days to form a homogeneous Kevlar nanofiber with a concentration of 11g / L solution.

[0051] (2) At 20-35°C, drop 4ml of Kevlar nanometer on the glass slide treated with piranha solution (concentrated sulfuric acid with a concentration of 98wt% and a concentration of 30wt% hydrogen peroxide in a volume ratio of 7:3) Fiber homogeneous solution, after spin-coating on a spin-coater at 500 rpm for 25 seconds, soak glass slides in deionized water for 5-10 seconds.

[0052] (3) At 20-35°C, drop 1ml of cadmium telluride aqueous solution on the glass sheet, bake in 85°C oven for 4 hours, add 4ml of cadmium telluride aqueous solution again, and continue to bake in 85°C oven for 4 hours.

[0053] (4) At 20-35° C., drop 2 ml of a phosphoric acid solution with a concentration of 85% on the glass slide, and spin coat it on a spin coater ...

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Abstract

The invention belongs to the technical field of fuel cells, and relates to a preparation technology of a proton exchange membrane electrolyte, in particular to a method for preparing a phosphoric aciddoped, high temperature proton exchange membrane with a layer-by-layer assembly structure based on a spin coating technique. Kevlar nanofibers, cadmium telluride nanocrystals and phosphoric acid arespin-coated respectively to complete 2-5 layer assembly, and a 2-5 composite membrane with an ordered structure (Kevlar-CdTe-PA) is prepared; an oven-dried membrane is soaked in a phosphoric acid solution with a mass fraction of 40 to 85%, and the phosphoric acid doped (Kevlar-CdTe-PA) 2-5 / (40 to 85%) PA composite membrane based on the cadmium telluride nanocrystals is prepared. The method for preparing the phosphoric acid doped, high temperature proton exchange membrane with the layer-by-layer assembly structure based on the spin coating technique realizes the assembly of the Kevlar nanofibers and the cadmium telluride nanocrystals, and prepares the high-temperature proton exchange membrane with an ordered structure and good proton conductivity, and has potential application value in thefield of fuel cells. In addition, the method for preparing the phosphoric acid doped high temperature proton exchange membrane with the layer-by-layer assembly structure based on the spin coating technique provides a new research method and idea for preparing a novel composite membrane based on nanomaterials and the Kevlar nanofibers.

Description

technical field [0001] The invention belongs to the technical field of fuel cells and relates to the preparation technology of proton exchange membrane electrolytes, in particular to a method for preparing phosphoric acid-doped and high-temperature proton exchange membranes with a layer-by-layer assembly structure based on spin-coating technology. Background technique [0002] Molecular assembly refers to the process of spontaneously forming molecular assemblies with special structures and shapes by using weak forces such as hydrogen bonds, electrostatic forces, van der Waals forces, and hydrophobic and lipophilic forces at the molecular level. Molecular assembly technology is often used in the assembly of nanomaterials and the preparation of ultra-thin films. This technique has the advantages of simple operation, no need for special equipment, and the thickness of the film can be controlled in the nanoscale range. As a specific form of molecular assembly technology applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1072
CPCH01M8/1072Y02E60/50
Inventor 车全通刘雷李子蕴毛威韩雪
Owner NORTHEASTERN UNIV
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