Long side chain SEBS-based alkaline polymer electrolyte membrane, preparation method and applications thereof

An electrolyte membrane and polymer technology, applied in circuits, fuel cells, electrical components, etc., can solve the problems of low conductivity of SEBS-based APEMs, APEMs losing the ability to conduct ions, and reducing the proportion of grafted functional groups. Stability, good mechanical properties, mild process effect

Active Publication Date: 2018-08-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polystyrene structure in SEBS is reduced, and this structure will lead to a significant decrease in the proportion of functional groups that can be grafted on the SEBS main chain, and there are polyalkane chain segments between polystyrenes,

Method used

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  • Long side chain SEBS-based alkaline polymer electrolyte membrane, preparation method and applications thereof
  • Long side chain SEBS-based alkaline polymer electrolyte membrane, preparation method and applications thereof
  • Long side chain SEBS-based alkaline polymer electrolyte membrane, preparation method and applications thereof

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Embodiment 1

[0036] Dissolve 1g SEBS in 10mL chloroform, add 0.8mL Br 2 After stirring evenly, 0.1 g of ferric chloride was added, stirred and reacted at 10° C. for 4 h, and then warmed up to room temperature to continue the magnetic stirring reaction for 5 h. Then the reaction solution was poured into ethanol to precipitate a solid, which was dissolved in tetrahydrofuran and then precipitated with ethanol. This process was repeated three times, and then fully washed with ethanol, and then the solid was vacuum-dried at room temperature for 8 hours for later use.

[0037] Dissolve 0.8 g of the above-prepared SEBS benzene ring para-halide in 20 mL of xylene. Add 0.4 g of magnesium powder at 3°C, stir at this temperature for 10 minutes, then raise the temperature to 40°C for 3 hours. After the solution was cooled to 5°C, 1.2g of cuprous bromide was added, then 0.5mL of dibromobutane was added dropwise and the temperature was raised to 50°C for 4h. After the solution returned to room tempera...

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Abstract

The invention provides a long side chain SEBS-based alkaline polymer electrolyte membrane, a preparation method and applications thereof, wherein the long side chain SEBS-based alkaline polymer electrolyte membrane is prepared by grafting a long side chain polymer material, the grafted long side chain has a positively charged functional group, the positively charged functional group is one or twoselected from quaternary ammonium salt ions, imidazole salt ions, guanidine salt ions and DABCO(1,4-diazabicyclo[2.2.2]octane) ions, and the long side chain is C2-C8 long alkyl chain. According to thepresent invention, SEBS with good mechanical property and good chemical stability is used as the main chain of the long alkyl chain alkaline polymer electrolyte membrane, such that the membrane has good mechanical property, has good chemical stability in the high temperature alkaline environment, and can meet the requirements of the fuel cell working environment; and the large-area membrane can be prepared by simply adjusting the temperature and the pressure through the hot pressing or solvent method, such that the membrane casting process is simple, and the batch production is easily achieved.

Description

technical field [0001] The invention belongs to the field of alkaline polymer electrolyte membrane; the invention also relates to the preparation of an alkaline polymer electrolyte membrane with higher electrical conductivity and better chemical stability. Background technique [0002] A fuel cell is a type of electrochemical reaction device that directly converts chemical energy in fuel (hydrogen, methanol, ethanol, etc.) into electrical energy. Compared with traditional internal combustion engines, fuel cells are not limited by the Carnot cycle, have high energy conversion efficiency, and are environmentally friendly; compared with primary and secondary batteries, fuel cells have high specific capacity, and as long as fuel is continuously supplied, they can continuously and stably output electric energy . Therefore, fuel cells have received extensive attention in recent years. [0003] Alkaline polymer electrolyte membrane fuel cells (APEMFCs) with alkaline polymer membr...

Claims

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Application Information

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IPC IPC(8): H01M8/1041H01M8/1069H01M8/18H01M8/1072C08F8/20C08F297/04C08J5/22
CPCC08F8/20C08J5/2256C08J2353/02H01M8/1041H01M8/1069H01M8/1072H01M8/18C08F297/04Y02E60/50Y02P70/50
Inventor 王素力杨丛荣孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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