Carbon nano-tube enhanced composite type metallic oxide electrode material and preparation thereof
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A technology of electrode materials and carbon nanotubes, which is applied in the direction of electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of low anode power generation, reduced adhesion between materials and substrates, wear resistance, and consumption
Inactive Publication Date: 2009-04-15
郭超
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First of all, since this material is prepared by high temperature thermal oxidation process, there are inevitably some cracks in the finished coating
This not only reduces the adhesion and wear resistance of the material to the substrate, but also these cracks will become the center of destructive...
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Embodiment 1
[0028] [Example 1] Preparation method of titanium-based carbon nanotube reinforced iridium and tantalum mixed metal oxide electrode material
[0029] 1. Roughen the titanium sheet (TA1) by soaking it in 10% oxalic acid solution at 95°C for 1 hour, clean it with deionized water, and then scrub it with alcohol or acetone or dry it with a hair dryer.
[0030] 2. Firstly, the carbon nanotubes were shortened by ball milling for 2 hours, then refluxed in concentrated nitric acid and concentrated sulfuric acid for 10 hours for activation and purification, washed with deionized water and dried for later use.
[0031] 3. Coating oxide precursor solution is H 2 IrCl 6 ·xH 2 O (dissolved in hydrochloric acid) solution + TaCl 5 (dissolved in n-butanol) solution, the solution was diluted with concentrated hydrochloric acid to a solution of 0.2mol / L metal ions.
[0032] 4. Calculate and weigh the required carbon nanotubes in an amount of 0.1 g / L, add them into the coating solution, and ...
Embodiment 2
[0035] [Example 2] Preparation method of titanium-based carbon nanotube reinforced iridium and tantalum mixed metal oxide electrode material
[0036] 1. Roughen the pure copper sheet with 300# sandpaper, clean it with deionized water, then scrub it with alcohol or acetone or dry it with a hair dryer.
[0037] 2. Firstly, the carbon nanotubes were shortened by ball milling for 2 hours, then refluxed in concentrated nitric acid and concentrated sulfuric acid for 10 hours for activation and purification, washed with deionized water and dried for later use.
[0038] 3. Coating oxide precursor solution is H 2 IrCl 6 ·xH 2 O (dissolved in hydrochloric acid) solution + C 16 h 36 o 4 Ti (tetrabutyl titanate) solution, dilute the solution with concentrated hydrochloric acid to a solution with a metal ion content of 0.2 mol / L.
[0039] 4. Calculate and weigh the required carbon nanotubes according to the amount of 5g / L, add to the coating solution, and fully disperse in the ultras...
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Abstract
The invention relates to a novel composite electrode material and a preparation method thereof, pertaining to the technical field of electrochemical electrode materials. Aiming at the problems of poor compactness of coating, low generating capacity and complex technology of the existing mixed metal oxides, the invention utilizes the high strength, good conductibitily, and the regulating effect to the traditional mixed metal oxide coating solution viscosity and leveling property of a carbon nano tube to prepare a composite mixed metal oxide electrode material with even and smooth appearance, compact microstructure, good mechanical property, good inoxidability, high generating capacity and reinforced carbon nano tube. The preparation process comprises the following steps: a mixed metal oxide precursor solution containing 0.1g/L to 5g/L of single-walled or multi-walled carbon nano tube that is processed with purification, short cutting and dispersion is coated on a conductive substrate surface which is roughened; the substrate is dried after being roasted at the temperature of 100 to 200 DEG C for 5 to 15min, sintered for 5 to 10min at the temperature of 400 to 600 DEG C; the coating and sintering steps are repeated till the required electrode coating thickness is reached; and finally the substrate is sintered for 50 to 150min at the temperature of 400 to 600 DEG C. As the coating solution velocity of the carbon nano tube is increased, the smoothness of the solution is improved, and the thickness and leveling property of the single-walled electrode coating are improved, the invention shortens the preparation time of electrode coatings with the same thickness, and leads the yield and production stability to be improved.
Description
Technical field: [0001] The invention relates to a novel composite electrode material of mixed metal oxide reinforced by carbon nanotubes and a preparation method thereof, belonging to the technical field of electrochemical electrode materials. Background technique: [0002] Mixed Metal Oxide (MMO for short), which has been developed rapidly in recent years, is a new type of electrode material, also known as Dimensionally Stable Anode (DSA for short). This material was produced in the 1960s with the development of the chlor-alkali industry. The anode materials used in the chlor-alkali industry require strong corrosion resistance, long life and high mechanical properties. And by the electroactive oxide IrO 2 , RuO 2 , RhO 2 , PtO x Equal and enhanced inert oxide Ta 2 o 5 、TiO 2 , MnO 2 Mixed metal oxide anodes with such composition can just meet this requirement, so this anode material quickly replaced the traditional graphite electrode and was quickly promoted, and ...
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