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Polybenzimidazole/polyvinylbenzyl chloride cross-linked high temperature proton exchange membrane with high oxidation resistance, and production method thereof

A technology of polyvinylbenzyl chloride and polybenzimidazole, which is applied in the field of polybenzimidazole/polyvinylbenzyl chloride cross-linked high-temperature proton exchange membrane and its preparation, can solve the problem of battery performance degradation and aggravation of PBI membrane. Degradation and other problems, to achieve the effect of high anti-oxidation performance, excellent dimensional stability, and good proton conductivity.

Inactive Publication Date: 2017-04-05
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These free radicals generated will aggravate the degradation of the PBI film, resulting in a significant drop in battery performance

Method used

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  • Polybenzimidazole/polyvinylbenzyl chloride cross-linked high temperature proton exchange membrane with high oxidation resistance, and production method thereof
  • Polybenzimidazole/polyvinylbenzyl chloride cross-linked high temperature proton exchange membrane with high oxidation resistance, and production method thereof
  • Polybenzimidazole/polyvinylbenzyl chloride cross-linked high temperature proton exchange membrane with high oxidation resistance, and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing a polybenzimidazole / polyvinylbenzyl chloride cross-linked high-temperature proton exchange membrane with high oxidation resistance, comprising the following steps:

[0029] (1) Dissolve 2 g of polybenzimidazole in 20 mL of N-methylpyrrolidone, then add polyvinylbenzyl chloride in an amount of 50% of the mass of polybenzimidazole, stir until dissolved, and cast The solution was poured into a glass mold and dried at 80°C to obtain a polybenzimidazole / polyvinyl benzyl chloride cross-linked film;

[0030] (2) Dissolve 0.5 g of polybenzimidazole in 10 mL of N-methylpyrrolidone, add the free radical quencher cerium oxide into the solution, stir ultrasonically for 1 h, and prepare a slurry with free radical quenching ability ; Its addition amount of free radical quencher is 0.3% of polybenzimidazole quality;

[0031] (3) Spray the obtained slurry evenly on both sides of the polybenzimidazole / polyvinyl benzyl chloride crosslinked film, and the spray thic...

Embodiment 2

[0037] A method for preparing a polybenzimidazole polyvinylbenzyl chloride cross-linked high-temperature proton exchange membrane with high oxidation resistance, comprising the following steps:

[0038] (1) Dissolve 0.82 g polybenzimidazole in 10 mL N,N-dimethylacetamide, then add polyvinylbenzyl chloride, the amount added is 80% of the mass of polybenzimidazole, stir until dissolved Finally, pour the casting liquid into a glass mold and dry at 80°C to obtain a polybenzimidazole / polyvinyl benzyl chloride cross-linked film;

[0039] (2) Dissolve 0.2 g of polybenzimidazole in 8 mL of N,N-dimethylacetamide, add the free radical quencher cerium oxide into the solution, and stir it ultrasonically for 1 h to obtain a free radical quenching Ability slurry; the amount of free radical quencher is 0.9% of the polybenzimidazole mass;

[0040] (3) Spray the obtained slurry evenly on both sides of the polybenzimidazole / polyvinyl benzyl chloride cross-linked film, and the spray thickness i...

Embodiment 3

[0047] A method for preparing a polybenzimidazole polyvinylbenzyl chloride cross-linked high-temperature proton exchange membrane with high oxidation resistance, comprising the following steps:

[0048] (1) Dissolve 0.79 g of polybenzimidazole in 10 mL of N-methylpyrrolidone, then add polyvinylbenzyl chloride, the amount of which is 60% of the mass of polybenzimidazole, stir until dissolved, and pour the casting solution Pour into a glass mold and dry at 80°C to obtain a polybenzimidazole / polyvinyl benzyl chloride cross-linked film;

[0049] (2) Dissolve 0.2 g of polybenzimidazole in 8 mL of N-methylpyrrolidone, add the free radical quencher cerium oxide into the solution, stir ultrasonically for 1 h, and prepare a slurry with free radical quenching ability; Its add-on of base quencher is 0.4% of polybenzimidazole quality;

[0050] (3) Spray the obtained slurry evenly on both sides of the polybenzimidazole / polyvinyl benzyl chloride crosslinked film, and the spray thickness is...

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Abstract

The invention discloses a polybenzimidazole / polyvinylbenzyl chloride cross-linked high temperature proton exchange membrane with high oxidation resistance, and a production method thereof. The cross-linked membrane adopts polybenzimidazole as a polymer skeleton, a cross-linked netted structure is formed in the membrane through a polymerization reaction by using the polyvinylbenzyl chloride as a cross-linking agent, and spraying of two sides of the membrane is carried out to produce anti-oxidation layers with strong free radical quenching ability in order to produce the high temperature proton exchange membrane with high oxidation resistance and high conductivity. The cross-linked high temperature proton exchange membrane has good proton conduction ability and excellent dimension stability without moistening, also has high oxidation resistance, can effectively solve the problem of polymer skeleton life shortening caused by attack of free radicals, and can be applied as a proton exchange membrane to high temperature proton exchange membrane fuel cells, direct alcohol fuel cells, electrochemical sensors or other electrochemical devices.

Description

technical field [0001] The invention belongs to the technical field of fuel cell materials, and in particular relates to a polybenzimidazole / polyvinylbenzyl chloride cross-linked high-temperature proton exchange membrane with high oxidation resistance and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a high-efficiency, clean and environment-friendly power generation device. It is an ideal power source for electric vehicles. application prospects. However, perfluorinated sulfonic acid membrane fuel cells represented by Nafion® are widely used at present, but the proton conductivity of this type of proton exchange membrane is greatly affected by the water content and temperature in the membrane, and the alcohol resistance performance is poor. The working temperature cannot exceed 80°C. Because PEMFC is limited by the operating temperature, it faces problems such as poor CO tolerance and difficult water and heat mana...

Claims

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Application Information

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IPC IPC(8): H01M8/1072H01M8/1041
CPCH01M8/1041H01M8/1072Y02E60/50Y02P70/50
Inventor 于书淳何春霞刘会雪马晓星张燕燕
Owner HUANGHE S & T COLLEGE
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