High-thermal-stability proton exchange membrane and preparation method

A technology of proton exchange membrane and high thermal stability, applied in the direction of climate sustainability, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of proton conduction decline, water instability, etc., and achieve a simple and easy preparation method, Easy to control and promote the effect of industrialization

Active Publication Date: 2020-05-22
江苏博洪富能氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention significantly improves the performance of the composite proton-conducting membrane, but water is still required as the conduction medium. When working at a higher temperature above 150°C, the water is unstable and the proton conduction will still decrease.

Method used

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  • High-thermal-stability proton exchange membrane and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Treat Nafion resin with liquid nitrogen at a temperature lower than -20°C, and grind it with a jet mill to obtain Nafion resin powder with a particle size of 5-10 microns;

[0034] (2) Add sulfonic acid to silica sol with a mass concentration of 12% to adjust the pH value to 4, then add ethanol to dilute to a mass concentration of 5%, and the spray gun pressure of the high-pressure sprayer is 0.5MPa, so that the diluted silica sol can be evenly sprayed on the Nafion resin On the surface of the powder, the spraying amount is controlled to be 8% of the mass of Nafion resin powder, and it is airtight and aged for 2 days;

[0035] (3) The aging material in step (2) is dried by centrifugal spraying, and the hot air at 100°C is sent into the drying chamber in a spiral shape, and the aging material is sent to the centrifugal spray dryer, and the aging material is dispersed into particles after high-speed centrifugal rotation , and dried by hot air flow to obtain Nafion res...

Embodiment 2

[0039] (1) Treat Nafion resin with liquid nitrogen at a temperature lower than -20°C, and grind it with a jet mill to obtain Nafion resin powder with a particle size of 5-10 microns;

[0040] (2) Add sulfinic acid to silica sol with a mass concentration of 12% to adjust the pH value to 5, then add ethanol to dilute to a mass concentration of 5%, and the spray gun pressure of the high-pressure sprayer is 0.5MPa, so that the diluted silica sol can be evenly sprayed on Nafion On the surface of resin powder, control the amount of spraying to be 10% of the mass of Nafion resin powder, and store it in airtight storage for 2 days;

[0041] (3) The aging material in step (2) is dried by centrifugal spraying, and the hot air at 100°C is sent into the drying chamber in a spiral shape, and the aging material is sent to the centrifugal spray dryer, and the aging material is dispersed into particles after high-speed centrifugal rotation. , and dried by hot air flow to obtain Nafion resin p...

Embodiment 3

[0045] (1) Treat Nafion resin with liquid nitrogen at a temperature lower than -20°C, and grind it with a jet mill to obtain Nafion resin powder with a particle size of 5-10 microns;

[0046] (2) Add sulfonic acid to silica sol with a mass concentration of 12% to adjust the pH value to 6, then add ethanol to dilute to a mass concentration of 5%, and the spray gun pressure of the high-pressure sprayer is 0.5MPa, so that the diluted silica sol can be evenly sprayed on the Nafion resin On the surface of the powder, the spraying amount is controlled to be 8% of the mass of Nafion resin powder, and it is airtight and aged for 2 days;

[0047] (3) The aging material in step (2) is dried by centrifugal spraying, and the hot air at 100°C is sent into the drying chamber in a spiral shape, and the aging material is sent to the centrifugal spray dryer, and the aging material is dispersed into particles after high-speed centrifugal rotation. , and dried by hot air flow to obtain Nafion re...

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Abstract

The invention relates to the technical field of proton exchange membranes, and particularly discloses a high-thermal-stability proton exchange membrane and a preparation method thereof. The high-thermal-stability proton exchange membrane is obtained by coating Nafion resin powder with silicon dioxide aerogel and then embedding the Nafion resin powder and aluminum triphosphate into holes of a polyvinylidene fluoride porous membrane together. Due to the fact that the polyvinylidene fluoride porous membrane serves as a carrier, high-temperature thermal deformation is effectively prevented due togood heat resistance of the polyvinylidene fluoride porous membrane; the Nafion resin powder is coated with the silicon dioxide aerogel, the Nafion resin powder absorbs water and swells in a microenvironment, excellent proton conductivity is shown, and in a macroscopic environment, the Nafion resin powder is thermally stable due to coating of the silicon dioxide aerogel; and by using aluminum triphosphate, a corrosion-resistant micro-membrane is formed, and the service life of the proton exchange membrane is effectively prolonged.

Description

technical field [0001] The invention relates to a high thermal stability proton exchange membrane and a preparation method thereof, belonging to the technical field of proton exchange membranes. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a fuel cell that uses polymer membrane as a solid electrolyte, has the advantages of low operating temperature, fast start-up, high specific power, simple structure, and convenient operation. preferred energy source for stations, etc. Inside the fuel cell, the proton exchange membrane provides a channel for the migration and transport of protons, so that the protons pass through the membrane from the anode to the cathode, and form a circuit with the electron transfer of the external circuit to provide current to the outside world. Therefore, the performance of the proton exchange membrane (PEM) has a great impact on The performance of the fuel cell plays a very important role, and its quality directly affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1018H01M8/1069
CPCH01M8/1018H01M8/1069Y02E60/50Y02P70/50
Inventor 曾军堂陈庆何方刘超
Owner 江苏博洪富能氢能源科技有限公司
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