High-strength water-retaining perfluorosulfonic acid proton exchange membrane as well as preparation method and application thereof

A proton exchange membrane and perfluorosulfonic acid technology, applied in fuel cells, electrochemical generators, electrical components, etc., can solve the problems of weak interface binding force, poor durability and stability, and disadvantages, and achieve low porosity , long service life, and the effect of improving stability

Active Publication Date: 2020-11-13
THINKRE MEMBRANE MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composite membrane prepared by graphene oxide and ionomer has some disadvantages, such as poor durability and stability of the membrane, weak interfacial bonding between graphene oxide and polymer matrix, which is not conducive to its Applied to ion-type composite proton exchange membranes, it is necessary to modify graphene oxide (GO) through covalent bond modification to improve the stability and durability of the membrane

Method used

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  • High-strength water-retaining perfluorosulfonic acid proton exchange membrane as well as preparation method and application thereof

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preparation example Construction

[0015] First illustrate the preparation method according to the high-intensity water-retaining perfluorosulfonic acid proton exchange membrane of the first aspect of the present invention, it comprises the following steps: (1) prepare functionalized graphene: by mass ratio 10:(1~3):20: 0.2 Weigh graphene oxide, lactic acid monomer, deionized water and stannous octoate into the autoclave, pressurize and heat at 100-120°C, pressure 1-2Mpa, time 4-10h, then naturally cool to 40- 60°C, filtered, and washed with deionized water to obtain lactic acid functionalized graphene oxide; (2) Preparation of perfluorosulfonic acid resin modified material: end with -SO 3 The mixed aqueous solution of Na perfluorosulfonic acid resin and polyvinyl alcohol is heated to 95-100°C, and the above-mentioned lactic acid functionalized graphene oxide is added according to the mass ratio of the aqueous solution to 5-20%, stirred evenly, and pressurized in the autoclave for 1.5- Heat at 2Mpa at 105-120°C...

Embodiment 1

[0020] The preparation method of high-strength water-retaining perfluorosulfonic acid proton exchange membrane is as follows: (1) Preparation of functionalized graphene: by mass ratio 10:1:20:0.2, weigh graphene oxide, lactic acid monomer, deionized water and octanoic acid Put stannous into the autoclave, pressurize and heat, temperature 100°C, pressure 1Mpa, time 4h, then naturally cool to 40°C, filter, and wash with deionized water once to obtain lactic acid functionalized graphene oxide; (2) perfluorinated Sulfonic acid resin modified material: with -SO at the end 3 The mixed aqueous solution of Na perfluorosulfonic acid resin and polyvinyl alcohol is heated to 95°C, and the mass ratio of the aqueous solution is 5%, and the above-mentioned lactic acid functionalized graphene oxide is added, stirred evenly, heated to 105°C under pressure of 1Mpa, kept for 2h, and stirred Heating and drying under normal pressure to obtain modified perfluorosulfonic acid resin; 3 The concentr...

Embodiment 2

[0022] The preparation method of high-strength water-retaining perfluorosulfonic acid proton exchange membrane is as follows: (1) Preparation of functionalized graphene: according to the mass ratio of 10:3:20:0.2, weigh sulfonated graphene oxide, lactic acid monomer, deionized Add water and stannous octoate into the autoclave, pressurize and heat, temperature 120°C, pressure 2Mpa, time 10h, then naturally cool to 60°C, filter, and wash with deionized water for 5 times to obtain lactic acid functionalized sulfonated graphene; ( 2) Perfluorosulfonic acid resin modified material: with -SO at the end 3 The mixed aqueous solution of Na perfluorosulfonic acid resin and polyvinyl alcohol is heated to 100°C, and the mass ratio of the aqueous solution is 20%, the above-mentioned lactic acid functionalized sulfonated graphene is added, stirred evenly, heated to 120°C under pressure at 2MPa, and kept for 10h, Heating and drying under normal pressure under stirring conditions to obtain pe...

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Abstract

The invention provides a high-strength water-retaining perfluorosulfonic acid proton exchange membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing functionalized graphene: weighing graphene oxide, a lactic acid monomer, deionized water and stannous octoate according to a mass ratio, adding into a high-pressure kettle,pressurizing and heating; (2) preparing a perfluorosulfonic acid resin modified material: heating a mixed water solution of perfluorosulfonic acid resin with -SO3Na at the tail end and polyvinyl alcohol, adding the lactic acid functionalized graphene oxide, and pressurizing in an autoclave; (3) preparing a perfluorosulfonic acid resin solution: putting the perfluorosulfonic acid resin modified material into an autoclave, adding an isopropanol water solution, heating and stirring; and (4) steel belt casting membrane preparation: adding the perfluorosulfonic acid resin solution into a storage tank of a casting machine, keeping the temperature of the storage tank, casting to form a membrane on a transmission steel belt through a casting knife edge, and enabling the transmission steel belt with the membrane to enter a drying oven, thereby obtaining the high-strength water-retention perfluorosulfonic acid proton exchange membrane applied to a fuel cell.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a high-strength water-retaining perfluorosulfonic acid proton exchange membrane, a preparation method and an application. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy stored in hydrogen and oxygen into electrical energy through an electrode chemical reaction. The proton exchange membrane is the core component of the fuel cell, and it is the key to determine the performance, life and cost of the fuel cell. An ideal proton exchange membrane must have the characteristics of good proton conductivity, resistance to gas permeation, high mechanical strength, good chemical stability, and low cost. [0003] In view of the above problems, the use of graphene oxide and other graphene oxide-enhanced perfluorosulfonic acid proton exchange homogeneous membranes as electrolyte materials for fuel cells is considered to be an effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L29/10C08L27/18C08L29/04C08K9/04C08K3/04H01M8/1072H01M8/1088
CPCC08J5/2275H01M8/1088H01M8/1072C08J2329/10C08J2327/18C08J2429/04C08K9/04C08K3/042Y02E60/50
Inventor 杨大伟贺建芸苑会林
Owner THINKRE MEMBRANE MATERIAL
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