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Polymer-based double-layer nanofiber composite proton exchange membrane and preparation method thereof

A technology of proton exchange membrane and nanofiber membrane, which is applied in the field of proton membrane fuel cells, can solve the problems of poor proton conductivity and structural stability, and achieve the effects of improving proton transmission efficiency, improving proton conductivity, and good mechanical strength

Inactive Publication Date: 2021-08-17
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a polymer-based double-layer nanofiber composite proton exchange membrane and a preparation method thereof to at least solve the problems of poor proton conductivity and structural stability of the proton exchange membrane existing in the prior art

Method used

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  • Polymer-based double-layer nanofiber composite proton exchange membrane and preparation method thereof
  • Polymer-based double-layer nanofiber composite proton exchange membrane and preparation method thereof
  • Polymer-based double-layer nanofiber composite proton exchange membrane and preparation method thereof

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preparation example Construction

[0031] The preparation method of the above-mentioned polymer-based double-layer nanofiber composite proton exchange membrane provided by the present invention includes: (1) preparing a nanofiber composite membrane, including: using a fiber precursor as a raw material to prepare uncrosslinked nanofiber by electrospinning Fiber membrane; crosslinking the uncrosslinked nanofiber membrane to obtain a crosslinked nanofiber membrane; using a polymer electrolyte as a raw material to form a polymer electrolyte layer on one surface of the crosslinked nanofiber membrane to obtain a nanofiber composite membrane (2) prepare the proton exchange membrane, the proton exchange membrane is made of two nanofiber composite membranes made according to the process of step (1), and its preparation process includes: after the two nanofiber composite membranes are laminated and placed, press The proton exchange membrane is obtained through the combined treatment; wherein, the way of stacking and placi...

Embodiment 1

[0041] (1) Preparation of nanofiber composite membrane

[0042] Preparation of cross-linked nanofiber membrane: add 1.8334g of diaminodiphenyl ether into 30mL of N, N-dimethylformamide, stir evenly, add 2.0121g of pyromellitic anhydride to it and react to obtain polyamic acid solution; then using the polyamic acid solution, a polyamic acid fiber membrane with a fiber diameter of 150nm was obtained by electrospinning; the polyamic acid fiber membrane was placed in a muffle furnace and thermally cross-linked at 300°C. The spinning time was 2 hours, and a polyimide fiber membrane with a fiber diameter of 140nm was obtained; the electrospinning conditions were: voltage 16KV, injection speed 0.05mm / min, receiving distance 15cm, and spinning time 2 hours.

[0043] Preparation of polymer electrolyte solution: 0.637 g of sulfonated polyether ether ketone with a sulfonation degree of 60% was added to 4.267 g of dimethyl sulfoxide solution to prepare a sulfonated polyether ether ketone ...

Embodiment 2

[0047] (1) Preparation of nanofiber composite membrane

[0048] Preparation of cross-linked nanofiber membrane: add 1.8334g of diaminodiphenyl ether into 30mL of N, N-dimethylformamide, stir evenly, add 2.0121g of pyromellitic anhydride to it and react to obtain polyamic acid solution; then using the polyamic acid solution, a polyamic acid fiber membrane with a fiber diameter of 180nm was obtained by electrospinning; the polyamic acid fiber membrane was placed in a muffle furnace and thermally cross-linked at 300°C. The bonding time was 4 hours, and a polyimide fiber membrane with a diameter of 180 nm was prepared; wherein, the electrospinning conditions were: voltage 16KV, injection speed 0.07mm / min, receiving distance 15cm, and spinning time 5 hours.

[0049]Preparation of polymer electrolyte solution: 1.3365g of sulfonated polyether ether ketone with a sulfonation degree of 60% was added to 8.944g of dimethyl sulfoxide solution and 0.2673g of phosphotungstic acid to obtain ...

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Abstract

The invention provides a polymer-based double-layer nanofiber composite proton exchange membrane, and the proton exchange membrane comprises a polymer layer and two fiber layers compounded with the polymer layer, wherein the polymer layer is located between the two fiber layers; and the polymer layer comprises a polymer electrolyte, and the fiber layer comprises nanofibers. The polymer-based double-layer nanofiber composite proton exchange membrane provided by the invention has good proton conductivity, structural stability and other properties.

Description

technical field [0001] The invention belongs to the field of proton membrane fuel cells, in particular to a polymer-based double-layer nanofiber composite proton exchange membrane. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. It has the characteristics of safety, reliability, high energy conversion rate, and environmental friendliness. The proton exchange membrane (PEM) is an important component of the fuel cell and is responsible for conducting protons. Therefore, the proton exchange membrane has excellent proton conductivity and structural stability, which is of great significance to ensure the efficient and stable operation of fuel cells. [0003] Proton exchange membranes with sulfonic acid groups have good electrical conductivity and other properties, and have gradually become a development trend. In proton exchange membranes, sulfonic acid groups conduct protons. As the degree of sulfon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1053H01M8/1069H01M8/1086D01F6/18D01F6/78D04H1/4382D04H1/728
CPCH01M8/1053H01M8/1069H01M8/1093D01F6/78D01F6/18D04H1/728D04H1/4382H01M2008/1095Y02E60/50
Inventor 魏鹏朱本胜李曦李晓静黄栋丛川波孟晓宇张晓灿周琼
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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