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Niobium carbide and tantalum carbide electrode preparation method

A technology of tantalum carbide and niobium carbide, applied in chemical instruments and methods, carbon compounds, lead-acid battery electrodes, etc., can solve the problems of strong corrosion resistance that have not been reported, and achieve stable quality, less operation steps and simple process Effect

Inactive Publication Date: 2014-01-01
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the research of niobium carbide and tantalum carbide as electrodes with strong corrosion resistance and high conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put the metal tantalum sheet (the size is 4cm×4cm×0.2mm, the mass is about 5.3g) and 20g epoxy resin into the reaction chamber, adopt argon as the protective gas, and control the pressure of the reaction chamber to be 50kPa (the protective gas is in the reaction The linear flow velocity in the chamber is about 8cm / min, the gas flows out from the reaction chamber, and is discharged into the atmosphere after passing through the liquid-sealed bottle). , let the reaction chamber cool down to room temperature naturally, turn off the shielding gas, and obtain a tantalum electrode whose outer surface is covered with a dense tantalum carbide protective layer.

Embodiment 2

[0024] Metal tantalum sheet (size is 4cm×4cm×0.2mm, mass is about 5.3g) and 20g mixture of phenolic resin and polyvinyl butyral resin (the mass ratio of phenolic resin and polyvinyl butyral resin is 10 : 1) Put it into the reaction chamber, adopt the mixed gas of nitrogen and hydrogen (wherein the hydrogen content is about 50~5000ppm, is a common standard gas) as the protective gas, and control the pressure of the reaction chamber to be about 500kPa (the protective gas is in the reaction chamber The linear flow rate is about 8cm / min, the gas flows out from the reaction chamber, and is decompressed into the atmosphere after passing through the liquid-sealed bottle). , let the reaction chamber cool down to room temperature naturally, turn off the shielding gas, and obtain a tantalum electrode whose outer surface is covered with a dense tantalum carbide protective layer.

Embodiment 3

[0026] Put a metal tantalum sheet (4cm×4cm×0.2mm in size, about 5.3g in mass) into the reaction chamber, use argon as the protective gas to inflate the reaction chamber into an argon atmosphere, and press in about 4 liters (at room temperature) of carbon monoxide In the reaction chamber, the pressure of the reaction chamber is controlled to be about 500 kPa with argon gas, and the reaction chamber is sealed. The heating rate was controlled at 5°C / min, and the temperature was programmed to rise to 600°C. After holding at 600°C for 30 minutes, the reaction chamber was naturally cooled to room temperature to obtain a tantalum electrode covered with a dense tantalum carbide protective layer.

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Abstract

The invention belongs to the field of electrochemistry engineering and industry, and particularly to a niobium carbide and tantalum carbide electrode preparation method, wherein a plate, a sheet, foil or a wire of metal niobium or tantalum is adopted, and is subjected to a reaction with carbon, carbon monoxide, an epoxy resin and the like in the protection of gas with a temperature of 600-1200 DEG C so as to obtain a compact niobium carbide and tantalum carbide layer on the outer surface of niobium and tantalum, wherein the internal is the metals such as niobium and tantalum, and the obtained material has the advantages of flexibility, strength and the like of the metal, has the electric conduction niobium carbide and tantalum carbide layer adopted as the strong corrosion resistance layer, and can be used as a dimensionally stable anode used in sulfuric acid, hydrochloric acid, chlor-alkali electrolysis and other electrolytes. The preparation method has advantages of less operation steps, simple process and stable quality, and is especially suitable for preparation of redox flow batteries, secondary batteries, and electrolysis industry electrodes.

Description

technical field [0001] The invention belongs to the field of electrochemical engineering and industry, in particular to a method for preparing niobium carbide and tantalum carbide electrodes. Background technique [0002] Lead-acid battery is a secondary battery with strong acid system. Due to its rich lead resources, low price, mature battery technology, wide application range and good reversibility, it is still widely used in various fields of sea, land and air. In lead-acid batteries, the grid that conducts current and supports active materials has a great impact on the cycle life of the battery. Lead-acid battery grids have undergone many technological improvements since the introduction of lead-acid batteries. [0003] For the grid alloy material, especially the positive grid, firstly, the resistance of the grid itself is required to be small, so as to enhance the conductivity of the plate and make the internal current of the electrode evenly distributed; secondly, the...

Claims

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Application Information

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IPC IPC(8): C01B31/30H01M4/16C01B32/914
CPCY02E60/126Y02E60/10
Inventor 程杰高辰刘东阳文越华徐艳赵鹏程曹高萍杨裕生谢自立
Owner NO 63971 TROOPS PLA
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