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Treating method of metallic titanium material

A treatment method and technology of metal titanium, applied in electrolytic inorganic material coating, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of no catalytic activity or low catalytic activity, low conductivity of semiconductor materials, small surface area, etc., to achieve Maintain long-term stable operation, high catalytic activity, and reduce contact resistance

Active Publication Date: 2013-06-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the above patents, the hydrobromic acid electrolysis cell uses carbon material instead of titanium material as the flow field or diffusion layer, and the solid polymer electrolyte water electrolyzer and integrated renewable fuel cell use titanium material as the flow field or diffusion layer without further treatment , small surface area, no catalytic activity or low catalytic activity; the oxidation time in the preparation of titanium dioxide nanotube arrays is longer than 30min, which takes a long time, and titanium dioxide is a semiconductor material with low conductivity. Applying titanium dioxide nanotube arrays to hydrobromic acid electrolysis The battery system will increase the contact resistance of the electrolytic cell and increase the electrolytic voltage

Method used

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  • Treating method of metallic titanium material
  • Treating method of metallic titanium material
  • Treating method of metallic titanium material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The titanium mesh was ultrasonically cleaned with acetone, ethanol, and deionized water for 15 min to remove surface oil, and the polishing solution (HF:HNO 3 :H 2 O volume ratio 1: 4: 5) to clean and remove surface oxide, dry with cold wind as anode, graphite sheet as cathode, put into electrolyte (0.5wt%NH 4 F and 10wt% water ethylene glycol solution) in 40V constant voltage anodization for 1min; take it out and rinse it repeatedly with deionized water, after drying, apply the chloroiridic acid solution on the anodized titanium mesh, and then put it into the tube type Anodized IrO with corrosion resistance and high catalytic activity was obtained by calcination at 450°C for 2 hours 2 Coated titanium mesh, IrO 2 The load is 0.4mg / cm 2 .

[0041] Preparation of membrane electrode for hydrobromic acid electrolytic cell: Nafion 115 membrane is used to prepare membrane electrode, and the anode catalyst iridium black load is 2.7mg / cm 2 , the cathode catalyst Pt / C load ...

Embodiment 2

[0046] The titanium mesh was ultrasonically cleaned with acetone, ethanol, and deionized water for 15 min to remove surface oil, and the polishing solution (HF:HNO 3 :H 2 O volume ratio 1: 4: 5) to clean and remove surface oxide, dry with cold wind as anode, graphite sheet as cathode, put into electrolyte (0.5wt%NH 4 F and 10wt% water ethylene glycol solution) in 50V constant voltage anodization for 30s; after taking it out, rinse it repeatedly with deionized water, and after drying, apply the chloroiridic acid solution on the anodized titanium mesh, and then put it into the tube Anodized IrO with corrosion resistance and high catalytic activity was obtained by calcination at 450 °C for 2 h in a conventional furnace 2 Coated titanium mesh, IrO 2 The load is 0.5mg / cm 2 .

[0047] Preparation of membrane electrode for hydrobromic acid electrolytic cell: Nafion 115 membrane is used to prepare membrane electrode, and the anode catalyst iridium black load is 2.7mg / cm 2 , the c...

Embodiment 3

[0055] Treatment of titanium mesh, anodic oxidation process, loaded IrO 2 Process, preparation of membrane electrode, assembly and test of electrolytic cell are the same as in Example 1, after 40V anodic oxidation for 30s, load IrO 2 , the loading capacity is 0.4, 0.5mg / cm 2 . The electrolytic polarization curve at 70°C is as follows Figure 5 As can be seen from the figure, IrO 2 The electrolytic voltage of the electrolytic cell is significantly reduced after the loading capacity of the electrolytic cell is increased, and the greater the current density, the more obvious the advantage. It shows that the contact resistance between the diffusion layer, the catalytic layer and the bipolar plate decreases after the load is increased.

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Abstract

The invention provides a treating method of a metallic titanium material. The metallic titanium material is sintered porous titanium, a titanium felt, a titanium mesh or foaming titanium. The treating method of the metallic titanium material comprises the following steps of: purifying the surface of the titanium material; taking the titanium material after purification as an anode to carry out anodizing; and electro-depositing a layer of catalyst or coating a catalyst precursor on the surface of the titanium material after oxidation, and carrying out high-temperature roasting to obtain the titanium material with high catalytic activity. The prepared titanium material with the catalytic activity can be used as a diffusion layer and also an electrode, has the advantages that the preparation method is simple, the catalytic activity is high, the decomposition voltage is greatly lowered, the energy utilization ratio is increased, and the like, is applied to a hydrobromic acid electrolytic cell and can also be used as the diffusion layer or the electrode in a hydrobromic fuel cell and a hydrobromic reproducible energy storage cell.

Description

technical field [0001] The invention relates to the field of chemical power source energy storage, in particular to a processing method for titanium materials and its application in hydrobromic acid electrolytic cells. The invention is not limited to the application in hydrobromic acid electrolytic cells, but also can be used as a diffusion layer or electrode in hydrogen bromine fuel cells and hydrogen bromine renewable energy storage cells. Background technique [0002] With the development of the economy and the improvement of people's living standards, the whole society has more and more demand for electric energy, and the degree of dependence is also getting higher and higher. The limitation of fossil energy resources and the environmental pollution caused by their excessive use have prompted people to pay more and more attention to the development and utilization of clean and renewable energy. Hydrogen is regarded as the most ideal energy carrier due to its advantages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D3/48C25D3/50C25D3/56C25D9/04H01M4/86
CPCY02E60/50
Inventor 邵志刚张林松俞红梅王浚英衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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