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Ternary doping modified SPEEK proton exchange membrane and preparation method

A technology of proton exchange membrane and exchange membrane, which is applied in the direction of chemical instruments and methods, membrane technology, electrical components, etc., can solve the problems of limiting the application of perfluorosulfonic acid membrane and the decline of proton conductivity, so as to improve the comprehensive performance and improve the proton The effect of conductivity

Inactive Publication Date: 2010-12-08
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the most widely used perfluorosulfonic acid membrane is represented by DuPont's Nafion membrane. However, when the operating temperature exceeds 80 ° C, the proton conductivity drops significantly, which limits the further application of perfluorosulfonic acid membranes in fuel cells. application

Method used

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  • Ternary doping modified SPEEK proton exchange membrane and preparation method
  • Ternary doping modified SPEEK proton exchange membrane and preparation method

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Embodiment 1

[0026] Embodiment one: the composition formula and preparation process of the present embodiment are as follows:

[0027] 1. Formulation

[0028] A. Composite membrane matrix material: SPEEK material with a sulfonation degree of 40%-80%, and a mass percentage of 80%-98.5%.

[0029] B. Ternary doped solid or liquid: ionic liquid, nano-yttrium oxide and H 3 PW 12 o 40 , the mass percentage is 1.5%-20%.

[0030] 2. Synthesis of SPEEK material with a sulfonation degree of 40%-80%: Add 10g of PEEK powder and 200ml of concentrated sulfuric acid into a 250mL three-neck flask, and mechanically stir the reaction at 60°C for 6h. After the reaction solution is cooled to room temperature, put Pour the reaction solution into 4.5L of ice-water mixture to precipitate the product, wash it with a large amount of deionized water for 5-10 times, and test the product to be neutral with pH test paper. Dry at 100°C for 24 hours and in vacuum at 100°C for 4 hours.

[0031] 3. Pretreatment of t...

Embodiment 2

[0035] Embodiment two: the composition formula and the preparation process of the present embodiment are as follows:

[0036] 1. Formulation

[0037] A. Composite membrane matrix material: SPEEK material with a sulfonation degree of 40%-80%, and a mass percentage of 80%-98.5%.

[0038] B. Ternary doped solid or liquid: ionic liquid, nano-yttrium oxide and H 3 PW 12 o 40 , the mass percentage is 1.5%-20%.

[0039] 2. Synthesis of SPEEK material with a sulfonation degree of 40%-80%: Add 10g of PEEK powder and 200ml of concentrated sulfuric acid into a 250mL three-neck flask, and mechanically stir the reaction at 60°C for 6h. After the reaction solution is cooled to room temperature, put Pour the reaction solution into 4.5L of ice-water mixture to precipitate the product, wash it with a large amount of deionized water for 5-10 times, and test the product to be neutral with pH test paper. Dry at 100°C for 24 hours and in vacuum at 100°C for 4 hours.

[0040] 3. Pretreatment ...

Embodiment 3

[0044] Embodiment three: the composition formula and the preparation process of the present embodiment are as follows:

[0045] 1. Formulation

[0046] A. Composite membrane matrix material: SPEEK material with a sulfonation degree of 40%-80%, and a mass percentage of 80%-98.5%.

[0047] B. Ternary doped solid or liquid: ionic liquid, nano-yttrium oxide and H 3 PW 12 o 40 , the mass percentage is 1.5%-20%.

[0048] 2. Synthesis of SPEEK material with a sulfonation degree of 40%-80%: Add 10g of PEEK powder and 200ml of concentrated sulfuric acid into a 250mL three-neck flask, and mechanically stir the reaction at 60°C for 6h. After the reaction solution is cooled to room temperature, put Pour the reaction solution into 4.5L of ice-water mixture to precipitate the product, wash it with a large amount of deionized water for 5-10 times, and test the product to be neutral with pH test paper. Dry at 100°C for 24 hours and in vacuum at 100°C for 4 hours.

[0049] 3. Pretreatmen...

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Abstract

The invention relates to a ternary doping modified SPEKK proton exchange membrane and a preparation method thereof. The exchange membrane comprises the following components by mass percent: 80-98.5% of SPEEK with 40%-80% of sulfonation degree and 1.5-20% of ternary adulterant. The preparation method comprises the following steps: 1, adopting the SPEEK with medium sulfonation degree as a matrix material so as to overcome the over high water absorption and poor stability of the composite membrane of the SPEEK with over high sulfonation degree, and ensure that the composite membrane has a certain water absorption; 2, adopting a three ternary doping mode of ion liquid, rare-earth oxide yttrium oxide and phosphotungstic acid so as to enable the SPEEK substrate to act with the dopant materials so as to improve the combination property of the composite membrane; and 3, by the process of high temperature high-intensity magnetic field, enabling the dopant materials to be orientated under the action of a magnetic field to form a proton conduction passage to improve the proton conduction rate of the composite membrane.

Description

technical field [0001] The invention relates to a sulfonated polyether ether ketone SPEEK proton exchange membrane and a preparation method thereof, in particular to a ternary doped modified sulfonated polyether ether ketone SPEEK proton exchange membrane and a preparation method thereof. Background technique [0002] The proton exchange membrane is the core component of the fuel cell. It mainly plays the role of dividing fuel and conducting protons. Its performance directly determines the development of fuel cells. [0003] At present, the most widely used perfluorosulfonic acid membrane is represented by DuPont's Nafion membrane. However, when the operating temperature exceeds 80 ° C, the proton conductivity drops significantly, which limits the further application of perfluorosulfonic acid membranes in fuel cells. application. Therefore, it is necessary to further prepare a proton exchange membrane with high proton conductivity. [0004] Sulfonated polyetheretherketone ...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M2/16B01D71/52C08J5/22C08L71/08C08K3/22C08K3/32H01M8/0243
CPCY02E60/50
Inventor 郭强董云凤李丹叶小燕邵先立李夏李萌
Owner SHANGHAI UNIV
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