Special amino modified perfluorosulfonic membrane for fuel cell, and preparation method

A perfluorosulfonic acid membrane, amino-modified technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of large dependence on external moisture content control, branch length, limited use, etc., to improve proton adsorption and migration. Ability, high structural symmetry, high feasibility effect

Inactive Publication Date: 2018-08-03
CHENDU NEW KELI CHEM SCI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above-mentioned invention patents are all improvements to the proton exchange membrane of fuel cells, but due to their long

Method used

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  • Special amino modified perfluorosulfonic membrane for fuel cell, and preparation method

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Experimental program
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Effect test

Embodiment 1

[0040] The following method was used to prepare the amino-modified perfluorosulfonic acid membrane for fuel cells:

[0041] a. Sulfonation of tetrafluoroethylene: Add sulfuric acid in a closed container, vacuumize it to make the pressure below 10Pa, then pass tetrafluoroethylene into it, and heat to react. The reaction temperature is 600°C, the pressure is 3MPa, and the reaction is 20h After that, get COFCF 2 SO 2 F;

[0042] b. Fluorination of 3-aminopropene: Under the condition of excluding oxygen, fluorinate 3-aminopropene to obtain CF 2 CFCF 2 NF 2 ; The fluorinating reagent used for fluorination is a mixed gas of fluorine and nitrogen, and the volume percentage of fluorine in the mixed gas is more than 30%; and the molar ratio of 3-aminopropene to fluorine is 1:10;

[0043] c, condensation reaction: the COFCF of step a 2 SO 2 CF for steps F and b 2 CFCF 2 NF 2 Put it in a closed container, and react under high temperature and high pressure for 10 hours to obtain...

Embodiment 2

[0050] The following method was used to prepare the amino-modified perfluorosulfonic acid membrane for fuel cells:

[0051] a. Sulfonation of tetrafluoroethylene: Add sulfuric acid in a closed container, vacuumize to make the pressure below 10Pa, then pass through tetrafluoroethylene, and heat to react. The reaction temperature is 800°C, the pressure is 6MPa, and the reaction is 10h After that, get COFCF 2 SO 2 F;

[0052] b. Fluorination of 3-aminopropene: Under the condition of excluding oxygen, fluorinate 3-aminopropene to obtain CF 2 CFCF 2 NF 2 ; The fluorinating reagent used for fluorination is a mixed gas of fluorine and nitrogen, the volume ratio of fluorine and nitrogen in the mixed gas is 1:1; and the molar ratio of 3-aminopropene to fluorine is 1:5;

[0053] c, condensation reaction: the COFCF of step a 2 SO 2 CF for steps F and b 2 CFCF 2 NF 2 Put it in a closed container, and react under high temperature and high pressure for 15 hours to obtain a modifie...

Embodiment 3

[0058] The following method was used to prepare the amino-modified perfluorosulfonic acid membrane for fuel cells:

[0059] a. Sulfonation of tetrafluoroethylene: add sulfuric acid in a closed container, vacuumize it to make the pressure below 10Pa, then pass tetrafluoroethylene into it, and heat to react. The reaction temperature is 700°C, the pressure is 4MPa, and the reaction is 12h After that, get COFCF 2 SO 2 F;

[0060] b. Fluorination of 3-aminopropene: Under the condition of excluding oxygen, fluorinate 3-aminopropene to obtain CF 2 CFCF 2 NF 2 ; The fluorinating reagent used for fluorination is a mixed gas of fluorine and nitrogen, the volume ratio of fluorine and nitrogen in the mixed gas is 2.5:1; and the molar ratio of 3-aminopropene to fluorine is 1:9;

[0061] c, condensation reaction: the COFCF of step a 2 SO 2 CF for steps F and b 2 CFCF 2 NF 2 Put it in a closed container, and react under high temperature and high pressure for 12 hours to obtain a mo...

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Abstract

The invention relates to a special amino modified perfluorosulfonic membrane for a fuel cell, and a preparation method, belongs to the technical field of a fuel cell diaphragm and aims to solve the technical problems. The preparation method comprises the steps of performing sulfonation of tetrafluoroethylene, fluorination of 3-amino propylene, a condensation reaction, a condensation polymerizationand acidizing and the like; by virtue of combination of N atoms and dual-short sulfonic acid group branch chains, grafted polymerization on the main chain is realized, so that the sulfonic acid groupcontent and structural symmetry are improved; therefore, the membrane material structure in the swelling process is more stable, and ion clusters can be formed in the membrane material more easily, thereby improving proton adsorption and mobility capabilities; the method is simple in process and high in feasibility; and the prepared amino modified perfluorosulfonic membrane is high in structuralsymmetry, high in regularity, easy to crystallize, relatively high in membrane material mechanical strength, high in proton conductivity and suitable for a high-temperature and low-moisture environment.

Description

technical field [0001] The invention relates to an amino-modified perfluorosulfonic acid membrane special for fuel cells and a preparation method, belonging to the technical field of fuel cell diaphragms. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy through an electrochemical reaction. It is mainly composed of positive electrode, negative electrode, electrolyte and auxiliary equipment. Due to the advantages of high efficiency, fast start-up, and low pollution, fuel cells are considered to be the fourth power generation technology that is expected to provide a large amount of electric energy after wind power, water power and solar power. The two major problems of "energy shortage" and "environmental pollution" have been solved, and the diversification of energy sources has been realized. In addition to the general characteristics of fuel cells, proton exchange mem...

Claims

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Application Information

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IPC IPC(8): H01M8/1069H01M8/1072H01M8/1088H01M8/1039C08F114/18
CPCC08F114/185H01M8/1039H01M8/1069H01M8/1072H01M8/1088Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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