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Azaspirocyclic cation-loaded polybiphenyl basic membrane and preparation method thereof

A polybiphenyl alkaline and azaspiro-ring technology, which is applied in the field of preparation of alkaline anion exchange membranes for fuel cells, can solve the problems of chemical stability restricting life, and achieve excellent thermal and mechanical properties, low swelling, and high ion conductivity. rate effect

Active Publication Date: 2021-07-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical stability of organic cations and polymer backbones in alkaline membranes has become the main factor restricting their lifetime.

Method used

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  • Azaspirocyclic cation-loaded polybiphenyl basic membrane and preparation method thereof
  • Azaspirocyclic cation-loaded polybiphenyl basic membrane and preparation method thereof
  • Azaspirocyclic cation-loaded polybiphenyl basic membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of 6-azaspiro[5.5]undecyl quaternary ammonium cation-supported polybiphenyl (PBP-ASU) basic membrane:

[0046] Its preparation process is as follows:

[0047]

[0048] (1) Preparation of polybiphenyl (PBP)

[0049] Take 3.0 grams of commercially available biphenyl and 3.2 grams of 4-piperidone, dissolve them in 10 milliliters of dichloromethane, add commercially available 3 milliliters of trifluoroacetic acid and 10 milliliters of trifluoromethanesulfonic acid, stir and react for 4 hours, complete reaction Finally, pour the viscous solution into the lye to precipitate, filter with suction to obtain a white solid, wash the polymer with deionized water several times to neutrality, finally, dry the polymer, collect the precipitate, and obtain a white polymer solid. Productive rate: 87%, degree of polymerization is 810, the nuclear magnetic spectrum of polybiphenyl (PBP) ( 1 HNMR) see figure 1 ;

[0050] (2) Take 3 grams of polybiphenyl (PBP) obtained in ...

Embodiment 2

[0057] Preparation of 6-azaspiro[5.5]undecyl quaternary ammonium cation-supported polyterphenyl (PTP-ASU) basic membrane:

[0058] Its preparation process is as follows:

[0059]

[0060] (1) Preparation of polyterphenyl (PTP)

[0061] Take 3.0 grams of commercially available terphenyls and 2.2 grams of 4-piperidone, dissolve them in 10 milliliters of dichloromethane, add 2 milliliters of commercially available trifluoroacetic acid and 7 milliliters of trifluoromethanesulfonic acid, stir and react for 6 hours, after complete reaction , pour the viscous solution into lye to precipitate, filter with suction to obtain a white solid, wash the polymer with deionized water several times until neutral, finally, dry the polymer, collect the precipitate, and obtain a white polymer solid poly Terphenyl (PTP), polymerization degree is 1400, productive rate: 91%;

[0062] (2) Get 3 grams of polyterphenyl (PTP) obtained in step (1), dissolve it in acetone, and add 0.7 grams of commerc...

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Abstract

The invention discloses an azaspirocyclic cation-loaded polybiphenyl alkaline membrane and a preparation method thereof, belonging to the technical field of fuel cell alkaline anion exchange membrane preparation; the steps are as follows: (1) Preparation of polybiphenylpiperidine ; (2) Preparation of azaspiro cation-loaded polybiphenyl; (3) Preparation of azaspiro cation-loaded polybiphenyl basic membrane by ion exchange. The azaspirocyclic cation-loaded polybiphenyl alkaline membrane of the present invention has super alkali resistance, and after soaking in high-temperature alkali solution for 2,500 hours, its ion conductivity and structure basically do not change. In addition, the azaspiro cation-loaded polybiphenyl basic membrane of the present invention also has high ion conductivity and low swelling. OH at 80°C ‑ The conductivity is as high as 102mS / cm, while the swelling degree is only 23%.

Description

technical field [0001] The invention relates to an alkaline membrane and a preparation method thereof, in particular to an azaspiro cation-loaded polybiphenyl alkaline membrane and a preparation method thereof, and belongs to the technical field of preparation of alkaline anion exchange membranes for fuel cells. Background technique [0002] In recent years, fuel cells (Fuel cells) have received extensive attention due to their high efficiency, cleanliness, and environmental friendliness. Compared with conventional power technologies, fuel cells have outstanding advantages such as high energy conversion efficiency (50% to 70%), diversified fuels, low noise, environmental friendliness, and decentralized and centralized power supply. In particular, proton exchange membrane fuel cells (PEMFCs) have been extensively explored for commercial applications. [0003] However, the key materials of proton exchange membrane fuel cells (PEMFCs): the cost and lifetime of platinum catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/083C08G61/12
CPCC08G61/122H01M8/083H01M2300/0014Y02E60/50
Inventor 朱红陈南君
Owner BEIJING UNIV OF CHEM TECH
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