Preparation method for flexible inorganic/organic composite proton exchange membrane

A proton exchange membrane, inorganic technology, applied in the field of composite materials, can solve the problems of difficulty in preparing large-area membranes, application limitations, lack of flexibility of proton exchange membranes, etc., to overcome inflexibility, high proton conductivity, and high heat resistance. Effects of Sexuality and Dimensional Stability

Inactive Publication Date: 2012-01-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inorganic / organic composite proton exchange membrane prepared by the tablet method has a certain mechanical strength and can withstand a certain pressure, but the proton exchange membrane still lacks flexibility, and it is difficult to prepare a large-area membrane, which greatly limits its application

Method used

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  • Preparation method for flexible inorganic/organic composite proton exchange membrane
  • Preparation method for flexible inorganic/organic composite proton exchange membrane
  • Preparation method for flexible inorganic/organic composite proton exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: Dissolving sulfonated polyetheretherketone (SPEEK) in dimethylformamide (DMF) to obtain a sulfonated polyetheretherketone (SPEEK) (10wt%) solution.

[0019] Step 2: Add Nafion-containing phosphosilicate glass powder (Nafion / P 2 O 5 -SiO 2 ) mixed with sulfonated polyether ether ketone (SPEEK) solution, the weight ratio of Nafion phosphosilicate glass powder to sulfonated polyether ether ketone (SPEEK) is 5:5. Perform mechanical ball milling to obtain a mixture containing Nafion phosphosilicate glass powder dispersed in sulfonated polyether ether ketone (SPEEK) solution.

[0020] Phosphosilicate glass containing Nafion was prepared by sol-gel method (Nafion / P 2 O 5 -SiO 2 ). First, tetraethyl orthosilicate, deionized water and hydrochloric acid were mixed according to the ratio of 1:4:4×10 -3 The molar ratio was vigorously stirred at room temperature for 30 minutes. Then add Nafion solution to the solution according to the ...

Embodiment 2

[0023] Step 1: Dissolving sulfonated polyetheretherketone (SPEEK) in dimethylformamide (DMF) to obtain a sulfonated polyetheretherketone (SPEEK) (10wt%) solution.

[0024] Step 2: Add Nafion-containing phosphosilicate glass powder (Nafion / P 2 O 5 -SiO 2 ) mixed with sulfonated polyetheretherketone (SPEEK) solution, the weight ratio of Nafion-containing phosphosilicate glass powder to sulfonated polyetheretherketone (SPEEK) is 6:4. Perform mechanical ball milling to obtain a mixture containing Nafion phosphosilicate glass powder dispersed in sulfonated polyether ether ketone (SPEEK) solution.

[0025] Phosphosilicate glass containing Nafion was prepared by sol-gel method (Nafion / P 2 O 5 -SiO 2 ). First, tetraethyl orthosilicate, deionized water and hydrochloric acid were mixed according to the ratio of 1:4:4×10 -3 The molar ratio was vigorously stirred at room temperature for 30 minutes. Then add Nafion solution to the solution according ...

Embodiment 3

[0028] Step 1: Dissolving sulfonated polyetheretherketone (SPEEK) in dimethylformamide (DMF) to obtain a sulfonated polyetheretherketone (SPEEK) (10wt%) solution.

[0029] Step 2: Add Nafion-containing phosphosilicate glass powder (Nafion / P 2 O 5 -SiO 2 ) mixed with sulfonated polyether ether ketone (SPEEK) solution, the weight ratio of Nafion phosphosilicate glass powder to sulfonated polyether ether ketone (SPEEK) is 7:3. Perform mechanical ball milling to obtain a mixture containing Nafion phosphosilicate glass powder dispersed in sulfonated polyether ether ketone (SPEEK) solution.

[0030] Phosphosilicate glass containing Nafion was prepared by sol-gel method (Nafion / P 2 O 5 -SiO 2 ). First, tetraethyl orthosilicate, deionized water and hydrochloric acid were mixed according to the ratio of 1:4:4×10 -3 The molar ratio was vigorously stirred at room temperature for 30 minutes. Then add Nafion solution to the solution according to the ...

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Abstract

The invention discloses a preparation method for a flexible inorganic/organic composite proton exchange membrane. The method comprises the following steps: 1, dissolving a proton conducting polymer in an organic solvent or water so as to obtain a proton conducting polymer solution; 2, mixing an inorganic proton conducting material or an inorganic proton conducting material containing organic components with the proton conducting polymer solution for mechanical ball milling so as to obtain a mixture in which the inorganic proton conducting material or the inorganic proton conducting material containing organic components disperses in the proton conducting polymer solution; 3, pouring the mixture on a substrate, and allowing the solvent to volatilize and the mixture to solidify so as to prepare the flexible inorganic/organic composite proton exchange membrane. The flexible inorganic/organic composite proton exchange membrane prepared in the invention has the characteristics of proton conducting capacity, flexibility, stable dimension, heat resistance and mechanical strength at a certain degree, and can be used in the field of fuel cells and related fields in need of proton exchange membranes like all-vanadium redox flow batteries, industrial electrolysis of chlor-alkali, super capacitors and sensors.

Description

technical field [0001] The invention relates to a material preparation method in the technical field of composite materials, in particular to an inorganic / organic composite proton exchange membrane preparation method. Background technique [0002] Proton exchange membranes are key materials for new energy devices such as fuel cells and all-vanadium redox flow batteries, as well as for the chlor-alkali industry. So far, in these fields, perfluorosulfonic acid organic polymer membranes (such as Nafion ?? Membrane), because the main component is high fluorine polymer, the material and synthesis cost are high, resulting in high price, and the disposal of waste membrane after use is difficult, and the environmental burden is heavy. Compared with organic polymer membranes, inorganic proton exchange membranes have the characteristics of simple preparation process, heat resistance, low cost, and high shape stability, so they are expected to become a substitute for organic polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16H01M8/1044H01M8/1069
CPCY02E60/50
Inventor 李海滨陈小晶蒋峰景
Owner SHANGHAI JIAO TONG UNIV
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