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A kind of proton exchange membrane applied to methanol fuel cell and preparation method thereof

A methanol fuel cell, proton exchange membrane technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of high cost, high methanol, permeation, etc., and achieve the effects of avoiding damage, simple preparation method and less impurities

Active Publication Date: 2021-02-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are not many proton exchange membranes that can be applied to batteries in the market. The most common one is the Nafion membrane produced by DuPont. Its application in methanol fuel cells still has a series of problems such as high methanol permeation and high cost.

Method used

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  • A kind of proton exchange membrane applied to methanol fuel cell and preparation method thereof
  • A kind of proton exchange membrane applied to methanol fuel cell and preparation method thereof
  • A kind of proton exchange membrane applied to methanol fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Select the base film polyethylene-polytetrafluoroethylene (ETFE), cut it into a size of 7cm×7cm, clean it with acetone, and then dry it in a vacuum oven for 24 hours, take it out and weigh it.

[0028] (2) The film was irradiated with a dose of 100 KGy.

[0029] (3) Carry out grafting and crosslinking to the radiation film, the grafting solution is 40ml styrene, 3ml isoprene, 57ml toluene. React at 60°C for 4h.

[0030] (4) Dry the grafted cross-linked film, measure the grafting rate, and the formula for calculating the grafting rate is (W-W 0 ) / W 0 ; where W represents the weight after grafting, W 0 initial weight.

[0031] (5) Sulfonate the membrane by using 2% chlorosulfonic acid solution at room temperature for 4 hours.

[0032] (6) Hydrolysis transformation, put the membrane into a beaker, add 1M sodium hydroxide solution for hydrolysis at 80°C for 12H, and then transform with 0.5M sulfuric acid solution at 80°C for 4h.

[0033] After testing, the graftin...

Embodiment 2

[0037] Adopt the method of embodiment 1, the difference lies in step (2), we adopt the dose of 20KGy to irradiate, other things remain unchanged.

[0038] After testing, the grafting ratio of the proton exchange membrane prepared in Example 2 was 19.97%, the ion conductivity at 30° C. was 0.053 S / cm, and the water content was 18.56%.

Embodiment 3

[0040] Adopt the method of embodiment 1, the difference lies in step (2), we adopt the dose of 300KGy to irradiate, other things remain unchanged.

[0041] After testing, the proton exchange membrane prepared in Example 3 has a grafting rate of 27.74%, an ion conductivity of 0.091 S / cm at 30° C., and a water content of 23.65%.

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Abstract

A proton exchange membrane applied to a methanol fuel cell and a preparation method thereof relate to functional polymer membrane materials. The base membrane is selected for treatment and pre-irradiation; the irradiated membrane is grafted and cross-linked; The production cost is low, and the prices of both the base film and the reagents used in the process are relatively cheap, and the cost can be greatly saved in mass production. The preparation method is simple, the steps are few, and the base membrane is directly grafted by radiation, and the prepared exchange membrane is relatively pure and has less impurities. It has high electrical conductivity, high water content, good thermal stability, and acid and alkali corrosion resistance. When tested in ultrapure water at 30°C, the conductivity can reach 0.098S / cm, and the water content can reach 24.56%; it is better than the conductivity of Nafion117 membrane at 30°C, which is 0.060S / cm.

Description

technical field [0001] The invention relates to a functional polymer membrane material, in particular to a proton exchange membrane applied to a methanol fuel cell and a preparation method thereof. Background technique [0002] With the development of society, the requirements for energy and environmental protection are getting higher and higher. Fuel cells have always maintained a high research enthusiasm due to their high energy utilization rate and zero-emission environmental protection advantages. Among them, methanol fuel cells are easy to add and store fuel, and have relatively high Good prospect. However, there are not many proton exchange membranes that can be applied to batteries in the market. The most common one is the Nafion membrane produced by DuPont. Its application in methanol fuel cells still has a series of problems such as high methanol permeation and high cost. So a series of studies that can replace Nafion membrane or solve its shortcomings began to app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1039H01M8/1072
CPCH01M8/1039H01M8/1072Y02E60/50Y02P70/50
Inventor 赵金保邓子祥方军
Owner XIAMEN UNIV
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