Bipolar plate of water electrolysis hydrogen production system as well as preparation method and application thereof

A hydrogen production system and water electrolysis technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor electrical conductivity and low mechanical strength, etc.

Inactive Publication Date: 2021-09-10
宝武清洁能源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the bipolar plate is made of graphite material or metal material, because the conductivity of graphite material is poorer than that of metal material, and its mechanical strength is small

Method used

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  • Bipolar plate of water electrolysis hydrogen production system as well as preparation method and application thereof
  • Bipolar plate of water electrolysis hydrogen production system as well as preparation method and application thereof
  • Bipolar plate of water electrolysis hydrogen production system as well as preparation method and application thereof

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preparation example Construction

[0040] The present invention also provides a method for preparing a bipolar plate of a water electrolysis hydrogen production system, comprising the following steps:

[0041] S1: preparing a porous titanium substrate;

[0042] Further, step S1 specifically includes:

[0043] S101: Ball milling titanium dioxide powder: disperse titanium dioxide powder in a solvent, and then use zirconia in a polyethylene tank for ball milling for 2 to 2.5 hours to decompose titanium dioxide powder and avoid agglomerates affecting the performance of the material to obtain a slurry; The average particle size of titanium dioxide powder is 0.2-0.3μm, and the specific surface area is 9m 2 / g;

[0044] S102: adding a preset ratio of binder and plasticizer to the slurry, and forming it by tape casting;

[0045] Further, after adding a preset proportion of binder to the slurry for grinding, then adding the same proportion of plasticizer for grinding, and then casting the ground mixture on the organi...

Embodiment 1

[0055] The preparation process of the porous substrate is as follows:

[0056] S1. Get 64g titanium dioxide powder and be dispersed in the azeotropic liquid that toluene and ethanol volume ratio are 1:1, then grind 2 hours with zirconia ball in polyethylene tank;

[0057] S2. Add 18 g of polyvinyl butyral to the slurry ground in step S1 and grind for 24 hours, then add 18 g of polyethylene glycol and mix for another 24 hours;

[0058] S3. Cast the mixture ground in step S2 on the polyester film at a speed of 30 cm / min by tape casting method, and control the thickness of one-time molding at 0.4 mm, and repeatedly pour 3 times in the equipment;

[0059] S4. Heating the poured sample at a rate of 2.5°C / min to 500°C for 2 hours to remove organic reagents, and then raising the temperature to 700°C at a rate of 5°C / min and keeping it for 3h to obtain the desired porous titanium substrate. A scanning electron microscope was used to observe the topography of the substrate surface, su...

Embodiment 2

[0069] The preparation process of the porous substrate is as follows:

[0070] S1. Get 76g of titanium dioxide powder and be dispersed in the azeotropic liquid that the volume ratio of toluene and ethanol is 1:1, then grind 2.5 hours with zirconia balls in polyethylene tank;

[0071] S2. Add 12 g of polyvinyl butyral to the ground slurry in step S1 and grind for 24 hours, then add 12 g of polyethylene glycol and mix for another 24 hours;

[0072] S3. Cast the mixture ground in step S2 on the polyester film at a speed of 35 cm / min by tape casting method, and control the thickness of one-time molding at 0.4 mm, and repeatedly pour 3 times in the equipment;

[0073] S4. Heating the poured sample at a rate of 2.5 °C / min for 2 hours to about 500 °C to remove the organic reagent, then raising the temperature to 900 °C at a rate of 6 °C / min and keeping it for 1 hour to obtain the desired porous titanium substrate. The morphology of the substrate surface was observed by scanning elec...

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Abstract

The invention discloses a bipolar plate of a water electrolysis hydrogen production system and a preparation method and application thereof. The bipolar plate comprises a porous titanium substrate and a niobium nitride film deposited on the porous titanium substrate, and the niobium nitride film has a cubic crystal structure and a hexagonal crystal structure. The preparation method of the bipolar plate comprises the following steps of: preparing a porous titanium substrate by a tape casting method, and preparing the bipolar plate of a water electrolysis hydrogen production tank body from a niobium nitride film in a magnetron sputtering manner under the conditions that the temperature of the porous titanium substrate is controlled to be 400-500 DEG C and the film forming time is controlled to be 60-120 minutes. The corrosion resistance of the bipolar plate is improved, the service life of the bipolar plate is prolonged, the electric energy loss of the water electrolysis hydrogen production tank body is further reduced, and the working efficiency of a water electrolysis hydrogen production technology is stabilized.

Description

technical field [0001] The invention belongs to the technical field of water electrolysis hydrogen production, and in particular relates to a bipolar plate of a water electrolysis hydrogen production system, a preparation method thereof and an application in water electrolysis hydrogen production. Background technique [0002] In recent years, hydrogen has gradually become a clean and efficient energy source. Based on the coupling of renewable energy and hydrogen fuel cells, electrolysis of water to hydrogen production technology has gradually become a key link and technology for the efficient production of clean and environmentally friendly green hydrogen resources. [0003] The bipolar plate is one of the key components in the water electrolysis technology, which plays an important role in heat dissipation, gas insulation, flow diversion and support in the water electrolysis cell. Usually the bipolar plate is made of graphite material or metal material, because the conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/052C25B11/063C25B11/075C25B1/04C23C14/06C23C14/35
CPCC25B11/031C25B11/052C25B11/063C25B11/075C23C14/0036C23C14/0641C25B1/04Y02E60/36
Inventor 饶文涛魏炜罗坚蔡方伟李文武谭轶童吴亦伟封羽涛
Owner 宝武清洁能源有限公司
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