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Preparation method of high-durability 3, 4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane

A hydroxyphenylalanine, proton exchange membrane technology, applied in fuel cells, electrochemical generators, electrical components, etc., can solve problems such as catalytic layer damage, reduce ion dissolution and migration, simple operation methods, and improve stability. sexual effect

Pending Publication Date: 2022-04-15
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some additives with excellent antioxidant effects cannot play a long-term role in the membrane due to water solubility, and may cause damage to the catalytic layer

Method used

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  • Preparation method of high-durability 3, 4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane
  • Preparation method of high-durability 3, 4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane
  • Preparation method of high-durability 3, 4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane

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preparation example Construction

[0024] A preparation method of a high chemical durability 3,4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane, comprising the following steps:

[0025] (1) 23g perfluorosulfonic acid resin is added to water, n-propanol, DMSO mass ratio is 4.5:4.5:1 in the 77g mixed solvent, stirs 24h at room temperature, obtains uniform 23wt% PFSA ionomer solution ;

[0026] (2) Mix 3,4-dihydroxyphenylalanine and cerium salt (III) in 2ml of water-ethanol solution with a volume ratio of 1:1 according to different molar ratios, and stir to obtain 3,4-dihydroxyphenylalanine Ceric acid cerium complex dispersion;

[0027] (3) the 3,4-dihydroxyphenylalanine cerium complex dispersion in (2) is added in the 23wt% PFSA ionomer solution of 3g, stirs 12h, obtains the ionomer solution of uniform dispersion, then The above solution was dispersed for 0.5 h with an ultrasonic cleaner. These casting solutions were poured onto flat glass and then scraped with a wire rod. After...

Embodiment 1

[0036] A method for preparing a high-durability 3,4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane, comprising the following steps:

[0037] (1) 23g perfluorosulfonic acid resin is added to water, n-propanol, DMSO mass ratio is 4.5:4.5:1 in the 77g mixed solvent, stirs 24h at room temperature, obtains uniform 23wt% PFSA ionomer solution ;

[0038] (2) Mix 0.0130g 3,4-dihydroxyphenylalanine and 0.0286g cerium nitrate hexahydrate in 2ml water-ethanol solution with a volume ratio of 1:1, and stir for 12h to obtain 3,4-dihydroxyphenylalanine Ceric acid cerium complex dispersion;

[0039] (3) the 3,4-dihydroxyphenylalanine cerium complex dispersion in (2) is added in the 23wt% PFSA ionomer solution of 3g, stirs 12h, obtains the ionomer solution of uniform dispersion, then The above solution was dispersed for 0.5 h with an ultrasonic cleaner. These casting solutions were poured onto flat glass and then scraped with a wire rod. Afterwards, drying at...

Embodiment 2

[0041] A method for preparing a high-durability 3,4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane, comprising the following steps:

[0042] (1) 23g perfluorosulfonic acid resin is added to water, n-propanol, DMSO mass ratio is 4.5:4.5:1 in the 77g mixed solvent, stirs 24h at room temperature, obtains uniform 23wt% PFSA ionomer solution ;

[0043] (2) Mix 0.0260g 3,4-dihydroxyphenylalanine and 0.0286g cerium nitrate hexahydrate in 2ml water-ethanol solution with a volume ratio of 1:1, and stir for 12h to obtain 3,4-dihydroxyphenylalanine Ceric acid cerium complex dispersion;

[0044] (3) the 3,4-dihydroxyphenylalanine cerium complex dispersion in (2) is added in the 23wt% PFSA ionomer solution of 3g, stirs 12h, obtains the ionomer solution of uniform dispersion, then The above solution was dispersed for 0.5 h with an ultrasonic cleaner. These casting solutions were poured onto flat glass and then scraped with a wire rod. Afterwards, drying at...

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Abstract

The invention discloses a preparation method of a 3, 4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane with high chemical durability, which comprises the following steps: adding perfluorosulfonic acid resin into a mixed solvent of water, n-propyl alcohol and DMSO, and stirring at room temperature to obtain a uniform PFSA ionomer solution; the preparation method comprises the following steps: mixing and stirring 3, 4-dihydroxyphenylalanine and cerium salt in a water-ethanol solution to obtain a 3, 4-dihydroxyphenylalanine cerium complex dispersion liquid; the preparation method comprises the following steps: adding a 3, 4-dihydroxyphenylalanine cerium complex dispersion liquid into a PFSA ionomer solution, stirring to obtain a uniformly dispersed ionomer solution, dispersing the solution by using an ultrasonic cleaning machine, pouring the solution onto plate glass, blade-coating by using a winding bar, and finally drying, annealing and forming a film to obtain the product. The operation steps are simple, and the chemical durability of the composite proton exchange membrane is improved on the premise that the proton conductivity loss of the proton exchange membrane is not large. The invention aims to solve the problem of durability in the field of proton exchange membranes, and has a better popularization prospect.

Description

technical field [0001] The invention belongs to the technical field of fuel cell proton exchange membranes, and in particular relates to a preparation method of a high-durability 3,4-dihydroxyphenylalanine chelated cerium ion composite proton exchange membrane. Background technique [0002] At present, most of the energy consumed in the world still mainly comes from traditional fossil energy, such as coal, oil, natural gas and so on. However, the use of fossil fuels will inevitably cause serious environmental pollution, and the world's demand for energy is increasing rapidly, and the problem of energy crisis is becoming more and more prominent. Therefore, in order to solve the problems of energy shortage and environmental pollution, it is urgent to develop efficient and clean new energy sources, such as solar energy, wind energy, hydrogen energy (fuel cells), etc. Among them, the proton exchange membrane fuel cell has attracted widespread attention because of its high effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/32H01M8/1046H01M8/1053H01M8/1004H01M8/1081C08J5/22C08L27/18C08K5/00
CPCC03C17/32C03C17/006H01M8/1046H01M8/1053H01M8/1055H01M8/1004H01M8/1081C08J5/2281C08J2327/18C08K5/0091Y02E60/50
Inventor 裴素朋徐康伟张维韩志越张英格马佳璐刘贵鹏徐晓钧
Owner SHANGHAI INST OF TECH
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