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Polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane and preparation method thereof

A technology of polybenzimidazole and polyionic liquid, applied in fuel cells, electrochemical generators, electrical components, etc., can solve the problems of low proton conductivity and affecting the overall performance of high temperature proton exchange membrane fuel cells, etc.

Inactive Publication Date: 2017-10-13
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low proton conductivity of the composite proton exchange membrane, it affects the overall performance of the high temperature proton exchange membrane fuel cell

Method used

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  • Polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane and preparation method thereof
  • Polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane and preparation method thereof
  • Polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Under the protection of nitrogen, add polyphosphoric acid as a solvent in a four-necked flask, add 0.015 mol 3,3',4,4'-tetraaminobiphenyl after heating for 1 hour, mix well and add 0.015 mol 5-tert-butyl Phthalic acid and 0.02 mol of phosphorus pentoxide were mixed uniformly again, and the temperature was raised to 190° C., and the reaction was continued for 30 hours, and poured into water to obtain polybenzimidazole.

Embodiment 2

[0058] Under the protection of nitrogen, add polyphosphoric acid as a solvent in a four-necked flask, add 0.015 mol 3,3',4,4'-tetraaminobiphenyl after heating for 1 hour, mix well and add 0.015 mol of isophthalic acid and 0.02 mol of phosphorus pentoxide, after mixing evenly again, raise the temperature to 195°C, continue the reaction for 25 hours, pour into water to obtain polybenzimidazole.

Embodiment 3

[0060] Under the protection of nitrogen, add polyphosphoric acid as a solvent in a four-necked flask, add 0.015 mol 3,3',4,4'-tetraaminobiphenyl after heating for 1 hour, mix well and add 0.015 mol 5-tert-butyl Phthalic acid and 0.02 mol of phosphorus pentoxide, after being uniformly mixed again, the temperature was raised to 200° C., and the reaction was continued for 20 hours, and poured into water to obtain polybenzimidazole.

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Abstract

The invention provides a polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane and a preparation method thereof, belonging to the field of polymer chemistry and high temperature proton exchange membrane fuel cell. The polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane comprises the following ingredients on weight percent: polybenzoimidazole, 55-85%; poly (ionic liquid) containing anions, 10-40%; cross-linking agent, 5%. The poly (ionic liquid) containing anions is [PBI-BuI][BF4], [PBI-BuI][TFMS] or [PBI-BuI][Tf2N]. The invention also provides a preparation method of the polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane. The proton conductivity of the polybenzoimidazole-poly (ionic liquid) cross-linked composite high temperature proton exchange membrane provided by the invention at 170 degrees centigrade is 0.0749 S / cm to 0.149 S / cm, the thickness of the membrane is 30 to 40 [mu]m.

Description

technical field [0001] The invention belongs to the fields of polymer chemistry and high-temperature proton exchange membrane fuel cells, and in particular relates to a polybenzimidazole-polyionic liquid cross-linked composite high-temperature proton exchange membrane and a preparation method thereof. Background technique [0002] Proton exchange membrane (PEM) is the core component of high temperature proton exchange membrane fuel cell (HT-PEMFC), and its performance is directly related to the working performance and application development of fuel cells. Different from the diaphragm in general chemical power sources, it can not only isolate fuel and oxidant and prevent them from reacting directly, but also acts as an electrolyte. [0003] The Chinese patent with publication number 1848504 discloses a composite proton exchange membrane for high-temperature fuel cells and its preparation method. The polyaryloxyphosphazene is doped to prepare a composite proton exchange memb...

Claims

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Application Information

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IPC IPC(8): H01M8/103H01M8/1044H01M8/1069H01M8/1072H01M8/1086
CPCH01M8/103H01M8/1044H01M8/1069H01M8/1074H01M8/1086H01M8/109Y02E60/50
Inventor 王双陈浩王哲刘凤祥田雪李金晟王旭
Owner CHANGCHUN UNIV OF TECH
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