Proton exchange membrane, preparation method thereof and fuel cell

A proton exchange membrane and slurry technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of high swelling degree of proton exchange membrane, inhibition of swelling degree of proton exchange membrane, and inability to control swelling effect

Active Publication Date: 2021-09-07
SHENZHEN GENERAL HYDROGEN ENERGY TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot suppress the swelling degree of the proton exchange membrane microscopically. In addition, since the above-mentioned added microporous reinforcement layer is a pla...

Method used

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  • Proton exchange membrane, preparation method thereof and fuel cell
  • Proton exchange membrane, preparation method thereof and fuel cell
  • Proton exchange membrane, preparation method thereof and fuel cell

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preparation example Construction

[0037] see figure 1 , the preparation method of the proton exchange membrane of a preferred embodiment of the present invention, comprises the steps:

[0038] Step S100: Prepare a linear prepolymer solution; the linear prepolymer solution is initiated by adding an initiator to a mixed solution of dibasic olefin amine, vinyl sulfonate and water solvent at a reaction temperature of 65°C-80°C and nitrogen gas It is obtained by free radical polymerization reaction of binary olefin amine and vinyl sulfonate in the mixed solution;

[0039] The synthetic reaction formula of above-mentioned linear prepolymer solution is shown in following formula (1):

[0040]

[0041]

[0042] Specifically, in the above formula (1) Refers to dibasic olefin amines; means vinyl sulfonate; Refers to the polymer molecule of the prepared linear prepolymer solution; K 2 S 2 o 8 as an initiator.

[0043] Step S100 specifically includes the following steps:

[0044] Step S110: Mix the first...

Embodiment 1

[0080] 1) Mix 15g of diallylamine and 5g of sodium styrene sulfonate to obtain a premixture, dissolve the premixture in 100mL of water solvent, and stir evenly to obtain a mixed solution;

[0081] 2) 0.5g sodium bisulfite and 1.2g potassium persulfate are mixed and dissolved in a water solvent, and stirred evenly to obtain an initiator;

[0082] 3) Under uniform stirring conditions, control the reaction temperature at 65°C-70°C and keep it under nitrogen, slowly add the initiator dropwise to the mixed solution to trigger the occurrence of dibasic olefin amine and vinyl sulfonate in the mixed solution Free radical polymerization, and then to obtain a linear prepolymer solution;

[0083] 4) Add 200mL of 1mol / L sulfuric acid solution to the linear prepolymer solution, and treat it with a dialysis bag with a molecular weight cut-off of 8000 to realize the acidification treatment of the linear prepolymer solution, and obtain the linear prepolymer solution after the acidification tr...

Embodiment 2

[0087] 1) Mix 12.5g of diallyl chloroacetamide with 3.6g of sodium allyl sulfonate to obtain a premixture, dissolve the premixture in 100mL of water solvent, and stir evenly to obtain a mixed solution;

[0088] 2) 0.5g sodium bisulfite and 1.2g potassium persulfate are mixed and dissolved in a water solvent, and stirred evenly to obtain an initiator;

[0089] 3) Under uniform stirring conditions, control the reaction temperature at 75°C-80°C and keep it under nitrogen, slowly add the initiator dropwise to the mixed solution to trigger the occurrence of dibasic olefin amine and vinyl sulfonate in the mixed solution Free radical polymerization, and then to obtain a linear prepolymer solution;

[0090] 4) Add 200mL of 1mol / L sulfuric acid solution to the linear prepolymer solution, and treat it with a dialysis bag with a molecular weight cut-off of 8000-14000 to realize the acidification treatment of the linear prepolymer solution, and obtain the linear prepolymer solution after ...

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Abstract

The invention discloses a preparation method of a proton exchange membrane, and the method comprises the following steps: adding an initiator into a mixed solution of binary olefin amine, vinyl sulfonate and a water solvent at the reaction temperature of 65-80 DEG C under the nitrogen condition to initiate free radical polymerization reaction of the binary olefin amine and the vinyl sulfonate to obtain a linear prepolymer solution; then mixing the linear prepolymer solution with a perfluorinated sulfonic acid resin dispersion liquid and mixed polyol according to a preset proportion for reaction to obtain polymer slurry; and finally, coating the polymer slurry to form a membrane, and drying and curing the membrane formed by coating to obtain the proton exchange membrane with a cross-linked interpenetrating network structure. According to the preparation method, a high-stability cross-linked polymer network is taken as a framework, an interpenetrating network is realized with perfluorosulfonic acid polymer molecules, the swelling degree of the proton exchange membrane is inhibited macroscopically and microcosmically, and the invention also discloses the proton exchange membrane prepared by the preparation method and a fuel cell comprising the proton exchange membrane.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a proton exchange membrane, a preparation method thereof and a fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is an important branch of the field of fuel cells. Proton exchange membrane (PEM) is one of the core components of proton exchange membrane fuel cells. The anode hydrogen fuel and cathode oxide in a membrane fuel cell act as a barrier. [0003] During the start-up-stop process of the proton exchange membrane fuel cell, the proton exchange membrane is in the change of dry-wet-dry and low temperature-high temperature-low temperature, that is, the proton exchange membrane is under the environment change of dry-wet cycle and cold-heat cycle for a long time , resulting in repeated swelling-shrinking deformation of the proton exchange membrane. Since the proton exchange membrane is a polymer polyelectrolyte, the proton exchange membrane...

Claims

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Application Information

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IPC IPC(8): H01M8/1069H01M8/1072H01M8/1088H01M8/1039C08F226/04C08F212/14C08F226/02C08F228/02
CPCH01M8/1069H01M8/1072H01M8/1088H01M8/1039C08F226/04C08F226/02H01M2008/1095C08F212/30C08F228/02Y02E60/50
Inventor 黄衡恢樊建涛张立陈海平黄逸斐
Owner SHENZHEN GENERAL HYDROGEN ENERGY TECH CORP LTD
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