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Organic-inorganic composite type high-temperature proton exchange membrane used for fuel cell and preparation method for proton exchange membrane

A proton exchange membrane, fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems affecting the overall performance of high temperature proton exchange membrane fuel cells, low proton conductivity, etc.

Active Publication Date: 2017-05-17
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Organic-inorganic composite type high-temperature proton exchange membrane used for fuel cell and preparation method for proton exchange membrane
  • Organic-inorganic composite type high-temperature proton exchange membrane used for fuel cell and preparation method for proton exchange membrane
  • Organic-inorganic composite type high-temperature proton exchange membrane used for fuel cell and preparation method for proton exchange membrane

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preparation example Construction

[0034] The present invention also provides a method for preparing an organic-inorganic composite high-temperature proton exchange membrane for a fuel cell, comprising the following steps:

[0035] Step 1: Dissolve polybenzimidazole containing hydroxyl groups in an organic solvent, then add a silane coupling agent with isocyanate groups and a catalyst, and react at 60-80°C for 48-72 hours to obtain a polybenzimidazole with siloxane The polybenzimidazole solution of alkyl side group;

[0036] Step 2: Add an ionic liquid functionalized silicon dioxide precursor to the polybenzimidazole solution with siloxane side groups obtained in Step 1, and stir for 6 to 12 hours to obtain a film-forming liquid. The film-forming liquid The weight percentage of polybenzimidazole containing ionic liquid functionalized silicon dioxide precursor and siloxane side group is (3-12%): (88-97%);

[0037] Step 3: The film-forming solution obtained in Step 2 is salivated to form a film, and the obtained...

Embodiment 1

[0049] The preparation method of hydroxyl-containing polybenzimidazole is: under nitrogen protection, polyphosphoric acid is added as a solvent in a four-necked flask, and 0.1mol 3,3',4,4'-tetraaminobiphenyl is added after heating for 2 hours. After mixing evenly, add 0.09mol 1,3-isophthalic acid and phosphorus pentoxide. After mixing again, raise the temperature to 190°C and continue the reaction for 2 hours. After cooling down, add 0.01mol hydroxyisophthalic acid and phosphorus pentoxide Diphosphorus, after mixing evenly, raise the temperature to 190°C again, continue to react for 30 hours, pour a small amount of phosphoric acid and continue to react for 20 hours, pour into water to obtain hydroxyl-containing polybenzimidazole. Wherein a=0.1~0.9.

Embodiment 2

[0051] The preparation method of hydroxyl-containing polybenzimidazole is: under nitrogen protection, polyphosphoric acid is added as a solvent in a four-necked flask, and 0.9mol 3,3',4,4'-tetraaminobiphenyl is added after heating for 1 hour. After mixing evenly, add 0.81mol 1,3-isophthalic acid and phosphorus pentoxide. After mixing evenly again, raise the temperature to 200°C and continue the reaction for 1 hour. After cooling down, add 0.01mol hydroxyisophthalic acid and phosphorus pentoxide Diphosphorus, after mixing evenly, raise the temperature to 200°C again, continue to react for 20 hours, pour a small amount of phosphoric acid and continue to react for 10 hours, pour into water to obtain hydroxyl-containing polybenzimidazole.

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Abstract

The invention provides an organic-inorganic composite type high-temperature proton exchange membrane used for a fuel cell and a preparation method for the proton exchange membrane, and belongs to the field of high polymer chemistry and high-temperature proton exchange membrane fuel cells. The proton exchange membrane is prepared from the following components based on weight percentages: 3-12% of ionic liquid functionalized silicon dioxide precursor and 88-97% of siloxane side base-containing polybenzimidazole; and the structural formulas of the ionic liquid functionalized silicon dioxide precursor and the siloxane side base-containing polybenzimidazole are as shown in the formulas I and II as follows respectively. The invention also provides the preparation method for the organic-inorganic composite type high-temperature proton exchange membrane used for the fuel cell. The proton conductivity of the organic-inorganic composite type high-temperature proton exchange membrane at a temperature of 170 DEG C is 0.050-0.075S / cm; and the thickness of the organic-inorganic composite type high-temperature proton exchange membrane is 30-50[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 an organic-inorganic composite high-temperature proton exchange membrane for fuel cells and a preparation method thereof. Background technique [0002] Proton exchange membrane (PEM) is the "heart" of high temperature proton exchange membrane fuel cell (HT-PEMFC). role. [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 membrane material, which is then formed into a film by a casting method, and the obtained proton exchange membrane has a wide range of service temperatures. Because the proton conductivity of the composite proton exchange membrane is low, the overall performance of the high temperature proton exchange memb...

Claims

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Application Information

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IPC IPC(8): H01M8/1016H01M8/1018H01M8/102H01M8/1041H01M8/1069H01M8/1072
CPCH01M8/1016H01M8/1018H01M8/102H01M8/1041H01M8/1069H01M8/1072Y02E60/50
Inventor 王双刘凤祥王哲倪宏哲李金晟田雪
Owner CHANGCHUN UNIV OF TECH
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