Preparation method for carbon nanotube and/or graphene reinforced lead based composite anode

A carbon nanotube and composite anode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of limited service life, high cost, insufficient mechanical properties, etc., and achieve the effect of small environmental impact, uniform dispersion and environmental friendliness

Active Publication Date: 2014-11-05
KUNMING HENDERA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with the traditional lead and its alloy anodes, the performance of the above-mentioned anodes has been improved, but there are still problems of high cost, limited service life, and insufficient mechanical properties, which limit its widespread use

Method used

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  • Preparation method for carbon nanotube and/or graphene reinforced lead based composite anode
  • Preparation method for carbon nanotube and/or graphene reinforced lead based composite anode
  • Preparation method for carbon nanotube and/or graphene reinforced lead based composite anode

Examples

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Effect test

Embodiment 1

[0021] The carbon nanotube reinforced lead-based composite anode preparation method, its specific steps are as follows:

[0022] (1) Electrolyte preparation: First, mix soluble lead salt, supporting electrolyte, carbon nanotubes, dispersant and water to form an electrolyte solution. The concentration of soluble lead salt in the electrolyte is 0.01mol / L, and the soluble lead salt is Lead acetate, the concentration of supporting electrolyte is 3mol / L, the supporting electrolyte is acetic acid (1.5mol / L) and sodium acetate (1.5mol / L), the concentration of carbon nanotubes is 4g / L, and the carbon nanotubes are multi-walled carbon nanotubes , the dispersant concentration is 5g / L, the dispersant is polyvinylpyrrolidone, and the remainder is water;

[0023] (2) Composite electrodeposition process: take metallic lead as the anode and titanium as the cathode, control the electrolyte temperature at 30°C, and the cathode current density at 300mA / cm 2 Under these conditions, electrodepos...

Embodiment 2

[0027] The carbon nanotube reinforced lead-based composite anode preparation method, its specific steps are as follows:

[0028] (1) Electrolyte preparation: First, mix soluble lead salt, supporting electrolyte, carbon nanotubes, dispersant and water to form an electrolyte solution. The concentration of soluble lead salt in the electrolyte is 0.01mol / L, and the soluble lead salt is Lead fluorosilicate, the supporting electrolyte concentration is 1.5mol / L, the supporting electrolyte is sodium fluorosilicate, the carbon nanotube concentration is 0.5g / L, the carbon nanotubes are single-walled carbon nanotubes, and the dispersant concentration is 1g / L , the dispersant is sodium dodecylbenzenesulfonate, and the remainder is water;

[0029] (2) Composite electrodeposition process: metal lead is used as the anode, titanium is used as the cathode, the temperature of the electrolyte is controlled at 50°C, and the cathode current density is 400mA / cm 2 Under the above conditions, electrod...

Embodiment 3

[0032] The graphene reinforced lead-based composite anode preparation method, its specific steps are as follows:

[0033] (1) Prepare the electrolyte: first mix the soluble lead salt, supporting electrolyte, carbon nanotubes, dispersant and water to form an electrolyte, in which the concentration of the soluble lead salt in the electrolyte is 0.1mol / L, and the soluble lead salt is Lead nitrate, the concentration of the supporting electrolyte is 1.5mol / L, the supporting electrolyte is a mixture of boric acid and sodium borate with a mass ratio of 1:1, the concentration of graphene is 0.5g / L, the concentration of the dispersant is 8g / L, and the dispersant is mass 1:1 mixture of sodium dodecylbenzenesulfonate and gelatin, the rest is water;

[0034] (2) Composite electrodeposition process: take metallic lead as the anode and titanium as the cathode, control the electrolyte temperature at 80°C, and the cathode current density at 500mA / cm 2 Under the above conditions, electrodepos...

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Abstract

Belonging to the technical field of new material preparation, the invention relates to a preparation method for a carbon nanotube and / or graphene reinforced lead based composite anode. The method includes: first, preparation of an electrolyte solution: mixing a soluble lead salt, supporting electrolyte, carbon nanotube and / or graphene, a dispersing agent and water evenly to obtain the electrolyte solution; a composite electrodeposition process: taking metal lead as the anode and adopting titanium as the cathode, controlling the electrolyte solution at a temperature of 20-80DEG C and the cathode current density at 200-500mA / cm<2>, and performing electrodeposition in the electrolyte solution so as to obtain carbon nanotube and / or graphene lead based composite powder; and preparation of the composite anode: subjecting the obtained carbon nanotube and / or graphene lead based composite powder to cold press molding at 20-50MPa, and performing sintering for 4h in a reducing atmosphere at 250DEG C, thus obtaining the composite anode. As the carbon nanotube and / or graphene have / has excellent mechanical and electrical properties, the prepared composite anode has improved mechanical properties and enhanced conductive ability.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube and / or graphene-reinforced lead-based composite anode, which belongs to the technical field of new material preparation. Background technique [0002] Industrial electrowinning generally uses lead alloys as anodes, because of its low price, easy processing and molding, and relatively stable electrochemical performance in sulfuric acid solution, such as zinc electrowinning generally uses Pb–Ag (0.5wt.%~1.0wt.%) Anode, copper electrowinning uses Pb-Sb, Pb-Ca-Sn anode. However, there are many defects in the production of lead alloy anodes, mainly including: high oxygen evolution potential, high density, low strength, easy deformation and short circuit. For many years, the metallurgical industry has been committed to the research and development of new energy-saving anode materials with high strength, corrosion resistance, good conductivity, low oxygen evolution potential, low price and lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/02C25C5/02
Inventor 杨长江蒋国祥蔡晓兰翟大成
Owner KUNMING HENDERA SCI & TECH
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