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Method for controlling SPE water electrolysis efficiency
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A technology for electrolysis of water and efficiency, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problems of high cost, cumbersome process and complex technology.
Inactive Publication Date: 2015-06-17
NANJING UNIV OF TECH
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Problems solved by technology
[0010] The technical problem to be solved by the present invention is that, aiming at the defects of complex technology, cumbersome process and high cost in the existing research field, from another perspective, a set of membrane stretching operation method is designed based on the parallel pipewater channel model, and the design of SPE electrolyzed water Additional device - stretching device
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Embodiment 1
[0028] (1) The titanium mesh is selected as the diffusion layer, and the catalyst-free membrane is selected for the membrane electrode, and the electrolysis device and the stretching device are assembled in turn according to the requirements, and the two are combined for use, (such as attached figure 1 ), in the figure: 1, the rotating shaft, 2, the supporting frame of the stretching device, 3, the membrane electrode, 4, the SPE water electrolysis device (remove the membrane electrode part), 5, the water injection hole, 6, the escape hole, 7, the connecting wire, 8. Measuring ruler, 9. Round hole.
[0029] (2) Fill the above assembled device with water to test the electrolytic water in the natural state of the membrane, and use the potentiodynamic scanning method to test the scanning potential. Current density-potential diagram.
[0030] (3) Disassemble the electrolysis device, separate the membrane electrode from the titanium mesh that is in contact with both sides, and then...
Embodiment 2
[0034] (1) Titanium mesh is selected as the diffusion layer, and the membrane electrode is selectively applied with a Pt catalytic dosage of 2mg / cm 2 coating, assemble the electrolyzed water device and the stretching device in turn according to the requirements, and combine the two for use, (as attached figure 2 ), in the figure: 1, the rotating shaft, 2, the supporting frame of the stretching device, 3, the membrane electrode, 4, the SPE water electrolysis device (remove the membrane electrode part), 5, the water injection hole, 6, the escape hole, 7, the connecting wire, 8. Measuring ruler, 9. Round hole.
[0035] (2) Fill the above assembled device with water to test the electrolyzed water in the natural state of the coating, and use the potentiodynamic scanning method to test. The scanning potential is selected from 1.5v to 3.6v to obtain the natural state, that is, when the elongation rate is zero. Current density-potential diagram.
[0036] (3) Disassemble the electro...
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Abstract
The invention relates to a method for controlling electrolytic efficiency of a solidelectrolyte (SPE) water-electrolysishydrogen production plant. A solidelectrolyte membrane stretching device is added on the basis of the original SPE water electrolysis device to implement the controllable water electrolysis efficiency. The traditional SPE water electrolysis device comprises a frame, pole plates, a seal ring, a membrane-electrode (MEA) component and the like. The membrane stretching device mainly comprises a bracket, a rotating shaft set and a stretching quantity measuring part. The method can change the electrolytic efficiency according to needs: after one SPE electrolysis process is completed, the SPE electrolysis bath is taken down, the membrane electrode is quantitatively stretched, and the electrolysis bath is fastened again to perform the water electrolysis at a certain stretching rate. The method is simple to operate, and is convenient and feasible.
Description
1. Technical field [0001] The invention belongs to the field of hydrogenenergy development, and in particular relates to a method for producing hydrogen by SPE electrolysis of water with artificially controllable efficiency. 2. Technical Background [0002] The development of society and economy has made people more and more dependent on energy, and the traditional energy storage capacity is shrinking day by day, and the consumption of a large amount of traditional energy has brought huge environmental problems at the same time. From the perspective of energy development strategy, it is urgent to find a new clean energy to replace traditional energy such as coal and oil. At present, hydrogen is regarded as the most ideal energy source in the future because of its high efficiency, cleanliness, and pollution-free characteristics. There are many sources of hydrogen, among which hydrogen production by electrolysis of water has a wide range of applications. SPE electrolysis of ...
Claims
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