Preparation of alkaline anion exchange membrane fuel cell electrode catalysis layer three-dimensional resin

A fuel cell electrode, three-dimensional resin technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of large steric hindrance, reduced polymer molecular chain force, resin adhesion and mechanical strength can not guarantee fuel cells Long-term operation and other problems, to achieve the effect of high ion exchange membrane capacity, good chemical stability and thermal stability

Active Publication Date: 2014-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this preparation method, the quaternary phosphonium reagent used has a large steric hindrance, which leads to a decrease in the force between the polymer molecular chains, and the adhesiveness and mechanical strength of the resin cannot guarantee the long-term operation of the fuel cell.

Method used

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  • Preparation of alkaline anion exchange membrane fuel cell electrode catalysis layer three-dimensional resin
  • Preparation of alkaline anion exchange membrane fuel cell electrode catalysis layer three-dimensional resin
  • Preparation of alkaline anion exchange membrane fuel cell electrode catalysis layer three-dimensional resin

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Dissolve 1 weight unit of polyarylsulfone (PASF) in 10 weight units of 1,1,2,2-tetrachloroethane, add 1 weight unit of anhydrous zinc chloride, and then add 20 weight units of 1, 4-dichloromethoxybutane, stirred and reacted at 40°C for 4 hours, poured the reaction solution into ethanol, filtered, and dried to obtain the chloromethylated polymer product, the chloromethylated polymer was Soak in 33wt% trimethylamine aqueous solution for 12 hours at ℃, take out, soak in 0.1M KOH aqueous solution for 12 hours at 30 ℃, polymer is washed to neutrality with deionized water, obtains alkalized polymer (QAPASF-OH ).

[0023] The ion exchange capacity of the product was 1.75 mmol / g.

[0024] The alkalinized polymer was dissolved in N,N-dimethylformamide (DMF) to make a 2wt% solution to obtain the three-dimensional resin of the QAPASF-OH / DMF electrode catalytic layer.

[0025] H using QAPASF-OH / DMF stereoresin 2 / O 2 fuel cell performance figure 1 As shown, it can be seen that...

Embodiment 2

[0027] Dissolve 1 weight unit of bisphenol A polyethersulfone (PSf) in 11 weight units of 1,1-dichloroethane, add 1.1 weight units of anhydrous aluminum chloride, and then add 21 weight units of 1, 4-dichloromethoxybutane, stirred and reacted at 50°C for 5 hours, poured the reaction solution into ethanol, filtered, and dried to obtain a chloromethylated polymer product, and prepared chlorine at 30°C The methylated product was soaked in triethylamine for 24 hours, taken out, soaked in 0.2M KOH aqueous solution at 35°C for 20 hours, and rinsed with deionized water until neutral to obtain an alkalized polymer (QAPSf-OH ).

[0028] The ion exchange capacity of the product was 1.61 mmol / g.

[0029] The alkalinized polymer was dissolved in N,N-dimethylacetamide (DMAc) to make a 3wt% solution to obtain the three-dimensional resin of the QAPSf-OH / DMAc electrode catalytic layer.

[0030] H using QAPSf-OH / DMAc stereoresin 2 / O 2 fuel cell performance figure 2 As shown, its highest...

Embodiment 3

[0032] Dissolve 1 weight unit of polyether sulfone ketone (PPESK) in 12 weight units of 1,2-dichloroethane, add 1.2 weight units of anhydrous tin chloride, and then add 22 weight units of 1 , 4-dichloromethoxybutane, stirred and reacted at 60°C for 6 hours, poured the reaction solution into ethanol, filtered, dried to obtain chloromethylated polymer product, soaked the above product at 40°C In tripropylamine for 30 hours, take it out, soak it in 0.5M KOH aqueous solution at 40°C for 24 hours, wash the polymer with deionized water until it is neutral, and obtain an alkalized polymer (QAPPESK-OH).

[0033] The ion exchange capacity of the product was 1.55 mmol / g.

[0034] The alkalized polymer is dissolved in a mixed solvent of water and ethanol (40:60 in volume ratio) to make a 4wt% solution to obtain the three-dimensional resin of the QAPPESK-OH type electrode catalyst layer.

[0035] H using QAPPESK-OH stereoresin 2 / O 2 fuel cell performance image 3 As shown, its highes...

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Abstract

The present invention relates to fuel cell materials, specifically to a preparation method of an alkaline anion exchange membrane fuel cell electrode catalysis layer three-dimensional resin. The preparation method comprises steps of polymer chloromethylation, quaternization, alkalization and dissolution, and is characterized in that Lewis acid and a chloromethylation reagent are adopted to carry out a chloromethylation reaction on a poly aryl ether polymer, the chloromethylated polymer is immersed in an amination reagent to carry out a quaternization reaction (for example: the chloromethylated polymer is immersed in an aqueous solution of trimethylamine), the quaternized polymer is subjected to an alkalization reaction, and the alkalized polymer is dissolved in a solvent to obtain the electrode catalysis layer three-dimensional resin. The alkaline three-dimensional resin prepared through the preparation method has high ion exchange capacity (1.55-1.98 mmol/g), and meets the work use temperature (50-60 DEG C) of the alkaline anion exchange membrane fuel cell.

Description

technical field [0001] The invention relates to a fuel cell material, in particular to a preparation method for an electrode catalyst layer stereoscopic resin (Ionomer) applied to an alkaline anion exchange membrane fuel cell. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy without going through a thermal conversion process. It does not go through the heat engine process and is not limited by the Carnot cycle. The energy conversion efficiency is 40%-60%. The range of fuel types that can be selected is large, environmentally friendly, and at the same time realizes low emissions of nitrogen oxides and sulfur oxides. and advantages. Compared with traditional proton exchange membrane fuel cells, alkaline anion exchange membrane fuel cells have many advantages: the oxidation rate of fuel (methanol or hydrogen) in alkaline environment is faster, non-precious metals such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/20C08G75/23C08G65/48C08L81/06C08L71/12C08L71/08H01M4/90
CPCY02E60/50
Inventor 俞红梅王光阜刘艳喜赵云邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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