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Proton exchange composite membrane and continuous preparation method thereof

A proton exchange and composite membrane technology, applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problems of difficult lamination and large-scale production, and achieve the effect of ensuring the hydrogen and proton transport capacity.

Pending Publication Date: 2022-03-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a proton exchange composite membrane and its preparation method, on the one hand to solve the problems of difficult bonding and large-scale production in the existing preparation of proton exchange composite membranes; Mechanically Strong Proton Exchange Composite Membranes

Method used

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  • Proton exchange composite membrane and continuous preparation method thereof
  • Proton exchange composite membrane and continuous preparation method thereof
  • Proton exchange composite membrane and continuous preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] 1. Dissolve the long side chain perfluorosulfonic acid resin with an EW value of 950g / mol in a mixed solvent with a volume ratio of 1:1 between deionized water and isopropanol to form a 5% perfluorosulfonic acid resin solution , and then add 0.1% nano-SiO of long side chain perfluorosulfonic acid resin quality 2 , to form casting solution 1;

[0035] 2. Dissolve the short side chain perfluorosulfonic acid resin with an EW value of 650g / mol in a mixed solvent with a volume ratio of deionized water and isopropanol of 1:1 to form a casting solution 2 with a concentration of 10%;

[0036] 3. Using the existing technology, the microporous membrane with a thickness of 3 μm is bonded with the support base film to form a composite support, which is placed on the coating unwinding roller;

[0037] 4. Put the casting solution 1 in step 1 into the feeding system 1, and use the first process parameters of coating speed 1m / min and coating wet thickness 1000μm to coat the casting so...

Embodiment 2

[0042] 1. Dissolve the long side chain perfluorosulfonic acid resin with an EW value of 1150g / mol in a mixed solvent with a volume ratio of 1:1 between deionized water and isopropanol to form a perfluorosulfonic acid resin solution with a concentration of 15%. , then add 0.5% nano Ag of long side chain perfluorosulfonic acid resin quality 2 O, forming casting solution one;

[0043] 2. Dissolving the short side chain perfluorosulfonic acid resin with an EW value of 850g / mol in a mixed solvent with a volume ratio of deionized water and isopropanol of 1:1 to form a casting solution 2 with a concentration of 25%;

[0044] 3. Using the existing technology, the microporous membrane with a thickness of 3 μm is bonded with the support base film to form a composite support, which is placed on the coating unwinding roller;

[0045] 4. Put the casting solution 1 in step 1 into the feeding system 1, and use the first process parameters of coating speed 10m / min and coating wet thickness 1...

Embodiment 3

[0050] 1. Dissolve the long side chain perfluorosulfonic acid resin with an EW value of 1000g / mol in a mixed solvent with a volume ratio of 1:1 between deionized water and isopropanol to form a perfluorosulfonic acid resin solution with a concentration of 10%. , and then add 0.2% nano-CaO of the quality of the long side chain perfluorosulfonic acid resin to form a casting solution 1;

[0051] 2. Dissolve the short side chain perfluorosulfonic acid resin with an EW value of 750 g / mol in a mixed solvent of deionized water and isopropanol with a volume ratio of 1:1 to form a casting solution 2 with a concentration of 15%;

[0052] 3. Using the existing technology, the microporous membrane with a thickness of 5 μm is bonded with the support base film to form a composite support, which is placed on the coating unwinding roller;

[0053] 4. Put the casting solution 1 in step 1 into the feeding system 1, and use the first process parameters of coating speed 5m / min and coating wet thi...

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Abstract

The invention discloses a proton exchange composite membrane and a preparation method, the composite membrane comprises an anode layer, a middle layer and a cathode layer, the anode layer comprises long side chain perfluorinated sulfonic acid resin, a water-retaining agent and a microporous membrane, the cathode layer is short side chain perfluorinated sulfonic acid resin, the middle layer is a long side chain perfluorinated sulfonic acid resin layer, and the microporous membrane is a porous membrane. The preparation method comprises the steps that the microporous membrane and the supporting base membrane are attached and then coated, the long-side-chain perfluorinated sulfonic acid resin and the water-retaining agent are mixed to prepare the anode layer, and the phenomenon that the reaction efficiency is affected due to the fact that the anode side is excessively dry is avoided; the cathode layer is prepared from the short-side-chain perfluorinated sulfonic acid resin, so that the flexibility of a side chain is improved, the microphase separation degree of the membrane can be improved, and the conductivity of the membrane is improved; a layer of long-side-chain perfluorinated sulfonic acid resin solution is sprayed above the cathode layer, so that the prepared composite membrane is better in uniformity; the composite membrane prepared from the perfluorinated sulfonic acid resin with long and short side chains can realize high conductivity under low IEC, and the proton exchange composite membrane has good chemical stability, dimensional stability and high conductivity.

Description

technical field [0001] The invention relates to a proton exchange composite membrane and a continuous preparation method thereof, belonging to the field of fuel cell membrane materials. Background technique [0002] The energy shortage problem in the world is becoming more and more serious. The traditional fossil fuels are non-renewable, and the environmental pollution caused by the use process is serious. However, most of the energy conversion is realized by thermomechanical process, and the conversion efficiency is low. Over the past 30 years, fossil fuels have declined and demand for clean energy has increased. Seeking environmentally friendly renewable energy is a severe task facing mankind in the 21st century. Therefore, in view of the many problems caused by the above-mentioned traditional energy sources, the research on improving energy conversion efficiency and seeking clean new energy sources has become more and more extensive. Fuel cells are a new type of energ...

Claims

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Application Information

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IPC IPC(8): H01M8/1027H01M8/1032H01M8/1041H01M8/1046H01M8/1067H01M8/1081H01M8/1086
CPCH01M8/1027H01M8/1032H01M8/1041H01M8/1046H01M8/1067H01M8/1081H01M8/1093H01M8/1086Y02E60/50
Inventor 郝金凯张洪杰邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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