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Fuel cell anionic membrane capable of blocking methanol permeation

A fuel cell, anion membrane technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of inability to verify the service life, difficult to meet service life requirements, etc., and achieve the effect of long service life

Inactive Publication Date: 2016-08-24
上海漫关越水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Since the direct methanol fuel cell anion membrane is a newly developed research and application, the service life cannot be verified, but this is a practical key technical requirement
Starting from the requirements of alkali resistance and oxidation resistance, the current polyphenylene ether, polystyrene or chitosan film materials contain easily broken group structures such as ester groups, ether groups, amide bonds or styrene structures, which are difficult to Meet service life requirements

Method used

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  • Fuel cell anionic membrane capable of blocking methanol permeation
  • Fuel cell anionic membrane capable of blocking methanol permeation
  • Fuel cell anionic membrane capable of blocking methanol permeation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Cationic polymerization: Add 48g of formula A cross-linking monomer (0.2mol) and 42g of formula B monomer (0.4mol) into a 1000ml PTFE-lined autoclave, replace the air with nitrogen for 2~3 times after sealing, and then add isobutylene 112g (2mol). Then, under magnetic stirring, the material was cooled to -30°C, and finally 5ml of boron trifluoride ether was added, the cationic polymerization reaction caused exotherm, and the cooled material was kept at about -20°C. After 2~3 hours, the exotherm ended. Continue to react for 1 hour, the temperature of the material returns to the freezing temperature of the refrigerant, and the polymerization reaction ends to obtain a viscous liquid of polyisobutylene oligomer;

[0045]Amination reaction: Add 200g of absolute ethanol and 45g of dimethylamine (1mol) into the autoclave through a high-pressure dropping device, heat the autoclave with a jacket, keep the autoclave material at 90~100°C, and raise the pressure to 0.3~ 0.5MPa, st...

Embodiment 2

[0051] Cationic polymerization: Add 48g of formula A cross-linking monomer (0.2mol) and 42g of formula B monomer (0.4mol) into a 1000ml PTFE-lined autoclave, replace the air with nitrogen for 2~3 times after sealing, and then add isobutylene 112g (2mol). Then, under magnetic stirring, the material was cooled to -30°C, and finally 5 g of anhydrous hydrogen fluoride was added, and the cationic polymerization reaction caused severe exotherm, which was difficult to control. The cooling material is kept at about -10°C. After 2 to 3 hours, the heat release ends, and the reaction is continued for 1 hour. The temperature of the material returns to the freezing temperature of the refrigerant, and the polymerization reaction ends, and a viscous liquid of polyisobutylene oligomer is obtained;

[0052] All the other operations are identical with embodiment 1;

[0053] After performance testing, the quaternary ammonium salt ion content is 1.69mmol / g, and the membrane conductivity at room ...

Embodiment 3

[0055] Cationic polymerization: Add 48g of formula A cross-linking monomer (0.2mol) and 42g of formula B monomer (0.4mol) into a 1000ml PTFE-lined autoclave, replace the air with nitrogen for 2~3 times after sealing, and then add isobutylene 112g (2mol). Then, under magnetic stirring, the material was cooled to -30° C., and finally 5 g of anhydrous p-toluenesulfonic acid was added, and the exotherm caused by cationic polymerization was very weak. The cooling material is kept at about -20°C. After 4 to 5 hours, the heat release ends, and the reaction is continued for 1 hour. The temperature of the material returns to the freezing temperature of the refrigerant, and the polymerization reaction is completed, and a viscous liquid of polyisobutylene oligomer is obtained;

[0056] All the other operations are identical with embodiment 1;

[0057] After performance testing, the quaternary ammonium salt ion content is 1.12mmol / g, and the membrane conductivity at room temperature is 2...

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Abstract

Disclosed is a fuel cell anionic membrane capable of blocking methanol permeation. Isobutylene, 1-chloroisopentene and cross-linked monomer 2-trifluoromethyl-6-methyl-5- heptylene acetate are subjected to processes of cationic pre-polymerization, amination, quaternization and dehydrating and cracking to obtain ethylenic bond, and then free radicals are subjected to polymerization and dense cross-linking to form the polyisobutene anionic membrane. The anionic membrane cannot be degraded in strong alkaline due to its saturated tertiary alkyl main chain, and further has the advantages of excellent alkali resistance and methanol blocking capacity. The membrane conductivity at room temperature is not less than 80mS / cm.

Description

technical field [0001] The invention is a high-performance anion membrane, which is used in the new energy field of alkaline fuel cells. Background technique [0002] Direct methanol fuel cells are one of the main development directions of electric vehicles in the future. Compared with direct methanol fuel cells based on proton exchange membranes, fuel cells using alkaline anion membranes have the following great advantages: [0003] (1) Compared with acidic conditions, the oxidation rate of fuel cells is faster, which is conducive to improving the conversion efficiency of fuel cells; [0004] (2) To avoid electrode catalyst poisoning, common cheap metal electrode materials can be used, such as silver, nickel, etc., which greatly reduces the cost of the platinum electrode of the proton membrane. [0005] An ideal direct methanol fuel cell anion membrane needs to meet many performance requirements. The main technical performance requirements are as follows: [0006] ① Alka...

Claims

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Application Information

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IPC IPC(8): C08F210/10C08F218/12C08F214/14C08F8/00C08F8/44C08F8/32C08J5/22C08J3/24H01M8/1027H01M8/1072
CPCC08F8/00C08F210/10C08J3/24C08J5/225C08J2323/22H01M8/1027H01M8/1072C08F218/12C08F214/14C08F8/44C08F8/32Y02E60/50
Inventor 王永军王海军
Owner 上海漫关越水处理有限公司
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