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Composite electrode material containing reactive plasma spraying nanometer TiN middle layer and preparation method thereof

A composite electrode and intermediate layer technology, applied in the field of electrochemistry, can solve the problems of difficulty in preparing a thick intermediate layer film, unsuitable for large-area electrodes, complicated processes, etc., and achieve the effects of long service life, improved oxygen evolution potential, and good stability.

Inactive Publication Date: 2013-10-09
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The TiN interlayer film prepared by physical deposition method is a good electrode interlayer material, but this preparation method has high cost and complicated process, is not suitable for large-area electrodes, and it is difficult to prepare a thicker interlayer film

Method used

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  • Composite electrode material containing reactive plasma spraying nanometer TiN middle layer and preparation method thereof
  • Composite electrode material containing reactive plasma spraying nanometer TiN middle layer and preparation method thereof
  • Composite electrode material containing reactive plasma spraying nanometer TiN middle layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 - Ti / TiN / Sb-SnO 2 Compound electrode

[0033] (1) Take a 3mm thick Ti plate with a grade of TA1 as the substrate, and perform sandblasting (corundum) treatment with a dry sandblasting machine to remove surface oil and roughen the surface, with a roughness of Rz25-100μm.

[0034] (2) The substrate after sandblasting is placed on the plasma spraying operation table, using 80KWGP-80 plasma spraying equipment, BT-1 spray gun, and nickel-aluminum alloy powder is added to the powder feeder (see Table 1 for composition, particle size 30-60μm powder), open the spraying control cabinet, and spray a 40μm thick nickel-clad aluminum alloy bonded bottom layer. The spraying process parameters are power 20KW, ion Ar gas 65L / min, ion N 2 Gas 50L / min, spraying distance 120mm, powder feeding N 2 Gas 10L / min.

[0035] The composition of the sprayed nickel aluminum and gold powder in Table 1

[0036]

[0037] (3) The powder in the powder feeder is replaced by micron metal...

Embodiment 2

[0046] Example 2 - Fe(Q235) / TiN / PbO 2 Compound electrode

[0047] (1) Take 3mm thick Q235 steel (carbon content 0.05-0.038wt.%) as the substrate, clean the oil on the surface of the substrate, and perform sandblasting.

[0048] (2) The substrate after sandblasting is placed on the plasma spraying operation table, nickel-aluminum alloy powder (95%Ni+5%aluminum, particle size 30-60μm) is added to the powder feeder, the spraying control cabinet is opened, and 70μm thick nickel is sprayed. The base layer is bonded with aluminum alloy. Spraying process parameters: power 25KW, ion Ar gas 70L / min, ion N 2 Gas 60L / min, spraying distance 120mm, powder feeding N 2 Gas 8L / min.

[0049] (3) The powder in the powder feeder is replaced with micron metal Ti powder, and the TiN intermediate layer is prepared by spraying grade Ti. The spraying process parameters are spraying power 28KW, ion Ar gas 70L / min, ion N 2 Gas 90L / min, spraying distance 110mm, powder feeding N 2 Gas 10L / min, the ...

Embodiment 3

[0054] (1) Same as embodiment 2

[0055] (2) The substrate after sandblasting is placed on the plasma spraying operation table, and iron-aluminum alloy powder (containing Fe50wt.%, the rest is Al, particle size 30-60μm) is added to the powder feeder, and the spraying control cabinet is opened to spray 50μm thick Iron-aluminum alloy powder bonds the bottom layer. Spraying process parameters: power 28KW, ion Ar gas 75L / min, ion N 2 Gas 70L / min, spraying distance 110mm, powder feeding N 2 Gas 8L / min.

[0056] (3)~(5) Same as embodiment 2

[0057] The oxygen evolution potential of the obtained composite electrode is 0.4V higher than that of the electrode without the TiN interlayer, and the strengthened life of the electrode is 120 hours.

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Abstract

The invention discloses a composite electrode material containing a reactive plasma spraying nanometer TiN middle layer. The material comprises a base body, a bonding bottom layer arranged on the base body, the reactive plasma spraying nanometer TiN middle layer arranged on the bonding bottom layer and an oxide catalytic layer arranged on the middle layer. The base body is an iron-based or Ti-based base body, the bonding bottom layer is a nickel aluminum self-fluxing alloy layer containing Ni 95wt. % or an iron aluminum self-fluxing alloy layer containing Fe 50 wt. %, the thickness of the bonding bottom layer is 30-70 micrometers, the thickness of the reactive plasma spraying nanometer TiN middle layer is 300-500 micrometers, and the thickness of the oxide catalytic layer is 10-30 micrometers. Compared with a conventional Ti-based and iron-based electrode, a composite electrode is remarkably improved by 20%-25% in oxygen evolution potential, the fortified life of a Ti / TiN / Sb-SnO2 composite electrode is 3 times as long as that of the conventional electrode without the middle layer, and the fortified life of a Fe / TiN / PbO2 composite electrode is 360 times as long as that of the Ti / TiN / Sb-SnO2 composite electrode.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to a titanium-based and iron-based metal oxide composite electrode material with a reactive plasma sprayed nano-TiN intermediate layer and a manufacturing method thereof. The electrode is suitable for electrochemical industry, electrometallurgy industry, pollution Wastewater treatment, new energy and other fields. Background technique [0002] Titanium-based metal oxide electrodes have good electrocatalytic activity, high electrolysis efficiency and high working stability. Therefore, since their appearance in the 1960s, titanium-based metal oxide electrodes have been widely used in the field of electrochemistry. The stability and service life of titanium-based metal oxide electrodes are not only related to the composition and structure of the metal oxide electrocatalytic coating, but also depend to a large extent on the surface state of the electrode substrate, the contact be...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B13/00C23C4/12C23C4/10C23C4/06C23C4/08C23C4/134
Inventor 董艳春张建新杨勇陈学广阎殿然刘哲褚振华
Owner HEBEI UNIV OF TECH
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