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Preparation method of high-performance proton exchange membrane

A proton exchange membrane, high-performance technology, used in fuel cell parts, fuel cells, electrical components, etc., can solve the problems of high methanol permeability and decreased proton conductivity of fluorine-containing sulfonic acid-based proton exchange membranes. The effect of maintaining proton conductivity, improving proton conductivity, and promoting transport

Active Publication Date: 2013-02-06
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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Problems solved by technology

[0006] In order to solve the problem that the fluorine-containing sulfonic acid type proton exchange membrane prepared by the existing method has high methanol permeability and is accompanied by a decrease in proton conductivity, the present invention provides a high-performance proton membrane that can not only reduce the amount of methanol permeation but also maintain the proton conductivity. Preparation method of exchange membrane

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  • Preparation method of high-performance proton exchange membrane
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  • Preparation method of high-performance proton exchange membrane

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preparation example Construction

[0025] In the preparation method of a kind of high-performance proton exchange membrane of the present invention, adopt the fluorine-containing sulfonic acid type proton exchange membrane that size is 5 centimeters * 5 centimeters as the substrate, the fluorine-containing sulfonic acid type proton exchange membrane is that the proton conduction group is Sulfonate, the polymer backbone in the membrane is partially fluorine-containing or fully fluorine-containing proton exchange membrane, such as DuPont's series of membranes, Asahi Chemical’s series film, Asahi Glass Co. Series membranes, Dow Chemical's Membranes, Ballard's BAM membranes and other fluorine-containing sulfonic acid-type proton exchange membranes that meet this feature.

[0026] In the preparation method of a kind of high-performance proton exchange membrane of the present invention, said sulfonated polyelectrolyte SPES-NH containing amino group 2 The structure of the is as follows:

[0027]

[0028] Am...

Embodiment 1117

[0033] Example 1 Preparation of Alcohol-resisting Film by Layer-by-Layer Assembly of 117 Film

[0034] Will 117 membranes were sequentially soaked in 5 wt% H 2 o 2 , deionized water, and 1 mol / L dilute sulfuric acid solution, soak for 30 minutes each, take out, blow dry with nitrogen, and set aside;

[0035] Take 5 pieces of 5cm×5cm size of the above-mentioned processed The 117 membrane is immersed in the sulfonated polyelectrolyte SPES-NH containing amine groups with a concentration of 2 wt%. 2 In the aqueous solution, soak at 50°C for 25 minutes, take it out, and rinse it with deionized water Sulfonated Polyelectrolyte SPES-NH Containing Amino Groups Physically Adsorbed on 117 Membrane Surface 2 , blown dry with nitrogen, and then Immerse the 117 membrane in an aqueous solution of glutaraldehyde with a mass percentage concentration of 0.9wt%, soak it at 50°C for 10 minutes, take it out, and rinse it with deionized water Glutaraldehyde physically adsorbed on the...

Embodiment 2

[0040] Example 2 Layer-by-layer assembly of films and preparation of alcohol barrier films

[0041] Will The membranes were sequentially soaked in 5 wt% H 2 o 2 , deionized water, and 1 mol / L dilute sulfuric acid solution, soak for 30 minutes each, take out, blow dry with nitrogen, and set aside;

[0042] Take 5 pieces of 5cm×5cm size of the above-mentioned processed The membrane is immersed in the sulfonated polyelectrolyte SPES-NH containing amine groups with a concentration of 1 wt%. 2 In the aqueous solution, soak for 10 minutes at 25°C, take it out, and rinse it off with deionized water Sulfonated Polyelectrolyte SPES-NH Containing Amino Groups Physically Adsorbed on Membrane Surface 2 , blown dry with nitrogen, and then The membrane was immersed in a glutaraldehyde aqueous solution with a mass percentage concentration of 5wt%, soaked at 40°C for 20 minutes, took it out, and rinsed it with deionized water. The glutaraldehyde physically adsorbed on the surfac...

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Abstract

The invention discloses a preparation method of a high-performance proton exchange membrane, relates to the technical field of a fuel cell membrane, and solves the problem that the methanol permeabiliy of the proton exchange membrane containing fluorosulfuric acid is high and is reduced along with the proton conductivity. The method comprises the steps of: dipping the pre-processed proton exchange membrane containing fluorosulfuric acid into 0.1-5wt% of sulfonated polyelectrolyte SPES-NH2 aqueous solution, soaking for 10-40 minutes at 20-80 DEG C; rinsing the SPES-NH2 at the surface of the membrane by deionized water, blowing by nitrogen, then dipping the membrane into 0.05-10wt% of compound aqueous solution containing two aldehyde groups, soaking for 10-40 minutes at 20-60 DEG C; rinsing the compound at the surface by the deionized water, blowing by the nitrogen, repeating the processes and assembling into 5-100 layers to obtain the high-performance proton exchange membrane disclosed by the invention. According to the method disclosed by the invention, the methanol permeability can be reduced and the proton conductivity can be improved.

Description

technical field [0001] The invention relates to the technical field of fuel cell diaphragms, in particular to a preparation method of a high-performance proton exchange membrane. Background technique [0002] Direct Methanol Fuel Cell (DMFC) is favored by the industry because of its abundant methanol source, easy portability and storage, and zero or low emission. The proton exchange membrane is the core component of DMFC, and its performance directly determines the performance of the battery. The basic requirement for the proton exchange membrane is that it has sufficient proton conductivity and can effectively prevent methanol from penetrating from the anode to the cathode of the battery. [0003] At present, the proton exchange membrane widely used in DMFC is a fluorine-containing sulfonic acid type proton exchange membrane, such as DuPont's series of membranes, Asahi Chemical’s series film, Asahi Glass Co. Series membranes, Dow Chemical's Membrane, Ballard's BAM ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08J7/12C08J7/14H01M8/1069H01M8/1072
CPCY02E60/12Y02E60/50
Inventor 李胜海张所波
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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