A kind of preparation method of ion membrane electrode for pure water electrolysis

A technology for electrolysis of ions and membrane electrodes, applied in electrodes, electrolysis process, electrolysis components, etc., to reduce direct damage, reduce production costs, and improve electrolysis efficiency

Inactive Publication Date: 2011-11-30
SHANDONG SAIKESAISI HYDROGEN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the wrinkling of the membrane electrode prepared by the above hot pressing method, uneven coating of the catalytic layer, easy contamination of the membrane electrode, low electrolysis efficiency of the membrane electrode, and long service life Short question, the present invention provides a preparation method of ion membrane electrode for pure water electrolysis that uses a transfer template for transfer printing to prepare a catalytic layer that is firmly combined with an ion membrane, has a high utilization rate of the catalyst, and has a long service life of the membrane electrode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of ion membrane electrode for pure water electrolysis, comprising the following steps:

[0031] (1) Cut the finished perfluorosulfonic acid ion membrane and immerse it in boiling 10wt% H 2 o 2 solution, boil for 30-60min, remove the residual organic matter and impurities on the surface of the membrane, and further expand the micropores of the membrane, and then place it in 10wt% boiling NaOH solution, boil for 30-60min, and exchange the hydrogen ion membrane for sodium Type, which facilitates the chemical reaction between the catalyst and the surface of the membrane, increases the adhesion of the catalyst, and immerses it in distilled water after cooling for use;

[0032] (2) Select a flat and smooth polyvinylidene fluoride plate and a polytetrafluoroethylene plate as catalyst coating templates, cut them into appropriate sizes, and have a thickness of 3-5mm. After washing with isopropanol, ethanol or acetone, place them in an oven After drying at ...

Embodiment 2

[0037] (1) Cut the finished perfluorosulfonic acid ion membrane and immerse it in boiling distilled water for 30-60 minutes to make the ion membrane fully swell. After cooling, take it out and put it on a glass plate, and use 1000 mesh sandpaper in distilled water to lightly polish it in the same direction for 30 minutes. time, then rotate 90°, and also polish 30 times to make fine scratches appear on the flat and smooth film surface, increase the surface area, and then immerse in distilled water;

[0038] (2) Immerse the ion membrane treated in step (1) in 1wt% boiling H 2 o 2 In the solution, cook for 30-60 minutes to remove the residual organic matter and impurities on the surface of the membrane, and at the same time further expand the micropores of the membrane, and then place it in 2wt% boiling NaOH solution and cook for 30-60 minutes to exchange the hydrogen ion membrane into the sodium form , to facilitate the chemical reaction between the catalyst and the membrane su...

Embodiment 3

[0044] (1) Cut the perfluorosulfonic acid ion membrane with a finished thickness of 0.17mm and boil it in distilled water for 30-60 minutes to make the ion membrane fully swell. After cooling, take it out and put it on a glass plate, and use 2000 mesh sandpaper in the same direction in distilled water Slightly polished 100 times, then rotated 90°, and polished 100 times to make fine scratches appear on the flat and smooth film surface, increasing the surface area, and then immersed in distilled water;

[0045] (2) Immerse the membrane treated in step (1) in 6 wt% boiling H 2 o 2 solution, boil for 30-60min, remove the residual organic matter and impurities on the surface of the membrane, and further expand the micropores of the membrane, and then place it in 6wt% boiling NaOH solution and boil for 30-60min to exchange the hydrogen ion membrane into the sodium form , to facilitate the chemical reaction between the catalyst and the membrane surface, increase the adhesion of the...

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Abstract

The invention relates to a preparation method of an ion membrane electrode for pure water electrolysis, belonging to the technical field of hydrogen production by water electrolysis. The preparation method comprises the following steps: separately preparing a cathode catalyst solution and an anode catalyst solution from a cathode catalyst, an anode catalyst, a Nafion solution, isopropyl alcohol, glycerol and distilled water; separately applying the cathode catalyst solution and the anode catalyst solution on two transfer-printing templates, and drying the templates at the temperature of 80-130 DEG C in vacuum; and fixing the two dried transfer-printing templates on both sides of an ion membrane, treating at the temperature of 130-190 DEG C and the pressure of 6 MPa for 2-5 minutes, cooling to room temperature while maintaining the pressure at 6 MPa, peeling off the transfer-printing templates, placing the templates in an oven and treating in vacuum at the temperature of 70-110 DEG C for 1 hour. By using the transfer-printing templates in the preparation method, under the premise of ensuring the combination firmness degree of the ion membrane and the catalyst layer, the direct damage to the ion membrane is reduced, thereby the service life of the membrane electrode is prolonged, the energy consumption is lowered, the electrolysis efficiency is improved, the preparation time is shortened and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by electrolysis of water, in particular to a preparation method of an ion membrane electrode for pure water electrolysis. Background technique [0002] With the intensification of the world's fossil energy supply crisis and the increasing requirements for environmental protection in various countries, the development of new clean energy and efficient use of energy have become research hotspots for governments and corporate R&D institutions around the world. Hydrogen energy, as a clean and efficient energy carrier, has high hopes. However, the electrolytic lye hydrogen production technology is relatively mature. It used to be the mainstream technology of large-scale hydrogen production equipment in various countries in the world. Diaphragms pollute the environment, and with the increasing calls for environmental protection around the world, this technology has been phased out in Weste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/08C25B9/10C25B1/10C25B9/23
CPCY02E60/366Y02E60/36
Inventor 丁孝涛王寿荣吴修让李家喜杨希昌
Owner SHANDONG SAIKESAISI HYDROGEN ENERGY
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