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High-durability fuel cell composite proton exchange membrane, and preparation method and application thereof

A proton exchange membrane and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of high cost and poor durability of hydrogen fuel cells, and achieve process safety, low hydrogen permeation current density, and stable performance.

Active Publication Date: 2021-04-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor durability and high cost in hydrogen fuel cells are mainly related to the proton exchange membrane (PEM)

Method used

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  • High-durability fuel cell composite proton exchange membrane, and preparation method and application thereof
  • High-durability fuel cell composite proton exchange membrane, and preparation method and application thereof
  • High-durability fuel cell composite proton exchange membrane, and preparation method and application thereof

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preparation example Construction

[0033]The present invention provides a highly durable hydrogen fuel cell proton microfine, and the preparation method thereof comprises the steps of:

[0034]Step (1): Demine the cerium oxide, Tris, and hydrochloride is dissolved in deionized water, and the magnetic force is stirred until a transparent uniform solution is formed, while stirring while slowly adding an appropriate amount of NaOH solution to a pH of the mixed solution having a pH of 8.5. The alkaline mixed solution was stirred at normal temperature for 2 h, and then the mixed solution was subjected to filtration, dried to obtain a dopamine coated cerium oxide;

[0035]Step (2): Polymer resin solution obtained by obtaining a polyamine-coated metal oxide free radical quarantin free radical quarantin and a solvent having a N, N-dimethyl amide or dimethyl sulfoxide in step (1), in a certain proportion Mixing, stirred to form a uniform dispersion;

[0036]Step (3): Pour the uniform dispersion into a pre-horizontal glass mold, 40 to ...

Embodiment 1

[0043]The fuel cell proton exchange membrane preparation method in this embodiment includes the following steps:

[0044](1) Use electronic balance of 80mg commercial CEO280 mg of dopamine, 63 mg of Tris is dissolved in 40 ml deionized water, and stirred on a magnetic stirrer to completely dissolve; 0.5 to a solution pH of the solution until the solution is 8.5, and stirred on a magnetic stirrer 2H; The mixed solution was subjected to filtration, and the mixture was allowed to obtain a polyvino coated cerium oxide particles at 60 ° C; the polydamine in this example was about 0.76 nm.

[0045](2) Electronic sacral title 3 g 10 wt% Nafion / DMSO solution was coated with 3 mg of polybatamine, and mixed with ultrasound cleaning is mixed and uniform, resulting in a translucent suspension.

[0046](3) Place the film forming glass mold on the precision slide, and transfer the overall to the vacuum drying tank, and adjust the glass mold to the level with a universal equalizer, followed by pouring th...

Embodiment 2

[0058]The metal oxide free radical quenner in this embodiment is cerium oxide.

[0059]The present embodiment is substantially identical to the first embodiment, and the difference is in that step (1), and controls the amount of the cerium oxide and the polymer resin to obtain a compound of the cerium oxide content of 0.8 wt% of the composite proton exchange membrane.

[0060]Step (1), commercial CEO2Popular hydrochloride, Tris is dissolved in deionized water, stirred on a magnetic stirrer to completely dissolve; 0.5H of 1 mol / L NaOH solution until the solution pH is 9, stirred on a magnetic stirrer; then press the mixed solution The filtration was carried out, and the dried 60 ° C was dried all night.

[0061]Among them, in the mixed solution, the concentration of dopamine hydrochloride is 3 mg / ml, and the concentration of the metal oxide free radical quencher is 3 mg / ml. The polydamine in this example is about 0.7 nm.

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Abstract

The invention discloses a high-durability fuel cell composite proton exchange membrane, and a preparation method and an application thereof. The high-durability fuel cell composite proton exchange membrane comprises a membrane matrix and a metal oxide free radical quenching agent dispersed in the membrane matrix, and the surface of the free radical quenching agent is provided with an organic matter coating layer. Compared with a common Dupont Nafion membrane, the durability of the composite membrane coated with the polydopamine is greatly improved. The preparation process is simple, safe and low in cost, and can be used for industrial production of the composite proton exchange membrane.

Description

Technical field [0001] The invention relates to the field of fuel cells, and in particular to a proton exchange membrane and its preparation method and application. Background technique [0002] Hydrogen fuel cells are hailed as the next generation clean energy carrier for portable and automotive applications due to their high energy density, high efficiency, low pollutant emissions, quiet operation, and short start-up and shutdown times. However, hydrogen fuel cells suffer from poor durability and high cost, mainly related to the proton exchange membrane (PEM). The proton exchange membrane, which plays a key role in hydrogen fuel cells, separates hydrogen and oxygen while allowing protons to pass through. DuPont's Nafion is considered a standard PEM because of its high proton conductivity, low hydrogen penetration and good chemical and mechanical stability. Contents of the invention [0003] Purpose of the invention: One of the purposes of the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1041H01M8/1072H01M8/1086
CPCY02P70/50
Inventor 刘建国刘佳李佳芮志岩
Owner NANJING UNIV
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