Preparation method of titanium-coated aluminum-based beta-PbO2-graphene composite electrode

A graphene composite, titanium-clad aluminum technology, used in electrodes, electrolytic coatings, electrolytic processes, etc., to achieve strong stability and electrical conductivity, improve corrosion resistance and electrocatalytic activity, and improve mechanical strength.

Active Publication Date: 2019-02-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for better control over how well carbon atoms connect together through chemical bonds called covalently or non-reactive interactions like hydrogenation. By doing this, it can create small particles that have high electric conduction but low water dissolution (which makes them easier to work with). Additionally, by adding specific substances onto these tiny crystals during their formation, they become stronger at certain conditions such as temperature changes without losing effectiveness. These technical improvements make the coatings resistant to damage from environmental factors like saltwater environments while still being able to function properly under various types of stressors.

Problems solved by technology

The technical problem addressed in this patented text relates to improving the performance or lifespan of electrode material for use during zinc production by reducing its impact on environmental concerns while maintaining their effectiveness at producing good quality products with reduced power requirements compared to traditional methods like sintered powder technology (SPT).

Method used

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  • Preparation method of titanium-coated aluminum-based beta-PbO2-graphene composite electrode
  • Preparation method of titanium-coated aluminum-based beta-PbO2-graphene composite electrode
  • Preparation method of titanium-coated aluminum-based beta-PbO2-graphene composite electrode

Examples

Experimental program
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Embodiment 1

[0032] Example 1: A titanium-clad aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, concrete steps are as follows:

[0033] (1) Add graphene to H 2 SO 4 -HNO 3 -H 2 o 2 - In the mixed acid solution of high potassium sulfate, the temperature is 50 ° C under mechanical stirring for 60 minutes; then ultrasonic stripping is carried out for 120 minutes to obtain nano-graphene; wherein H 2 SO 4 -HNO 3 -H 2 o 2 - H in high potassium sulfate mixed acid solution 2 SO 4 At a concentration of 9 mol / L, HNO 3 Concentration is 3 mol / L, H 2 o 2 The mass fraction is 10%, the concentration of high potassium sulfate is 1mol / L; the thickness of graphene is 10~12nm, the conductivity is 850~950S / m, graphene and H 2 SO 4 -HNO 3 -H 2 o 2 -The solid-to-liquid ratio g:mL of high potassium sulfate mixed acid solution is 1:5;

[0034] (2) Clean the nano-graphene in step (1), then add it to sodium borohydride solution for reduction for 15 minutes to obtain...

Embodiment 2

[0040] Example 2: A titanium-clad aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, concrete steps are as follows:

[0041] (1) Add graphene to H 2 SO 4 -HNO 3 -H 2 o 2 - In the mixed acid solution of high potassium sulfate, mechanical stirring was carried out at a temperature of 60°C for 80 minutes; then ultrasonic stripping was carried out for 60 minutes to obtain graphene nanometers; wherein H 2 SO 4 -HNO 3 -H 2 o 2 - H in high potassium sulfate mixed acid solution 2 SO 4 The concentration is 10mol / L, HNO 3 Concentration is 4mol / L, H 2 o 2 The concentration is 15%, the concentration of high potassium sulfate is 2mol / L; the thickness of graphene is 11~13nm, the conductivity is 950~1050 S / m, graphene and H 2 SO 4 -HNO 3 -H 2 o 2 -the solid-to-liquid ratio g:mL of high potassium sulfate mixed acid solution is 1:3;

[0042] (2) Clean the nano-graphene in step (1), then add it to sodium borohydride solution for reduction for 20 mi...

Embodiment 3

[0047] Example 3: A titanium-coated aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, concrete steps are as follows:

[0048] (1) Add graphene to H 2 SO 4 -HNO 3 -H 2 o 2 - In the mixed acid solution of high potassium sulfate, the temperature is 80 ° C under mechanical stirring for 120 min; then ultrasonic stripping is carried out for 80 min to obtain nano-graphene; wherein H 2 SO 4 -HNO 3 -H 2 o 2 - H in high potassium sulfate mixed acid solution 2 SO 4 The concentration is 13mol / L, HNO 3 Concentration is 5 mol / L, H 2 o 2 The mass percentage is 30%, the concentration of high potassium sulfate is 3 mol / L; the thickness of graphene is 10~14 nm, the conductivity is 850~950 S / m, graphene and H 2 SO 4 -HNO 3 -H 2 o 2 -the solid-to-liquid ratio g:mL of high potassium sulfate mixed acid solution is 1:5;

[0049] (2) Clean the nano-graphene in step (1), then add it to sodium borohydride solution for reduction for 20 minutes to obtain r...

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Abstract

The invention discloses a preparation method of a titanium-coated aluminum-based beta-PbO2-graphene composite electrode and belongs to the technical field of composite electrodes. According to the preparation method, graphene is subjected to covalent bond functionalization treatment, and then a covalent bond functionalized nano-graphene/lead nitrate-sodium fluoride-nitric acid plating solution isprepared, a pretreated cylindrical titanium-coated aluminum serves as an anode and rotates around the axis of the pretreated cylindrical titanium-coated aluminum, a stainless steel ring serves as a cathode, and graphene beta-PbO2 is electroplated under the condition of anode polarization to obtain the cylindrical titanium-coated aluminum-based beta-PbO2-graphene composite electrode. A graphene beta-PbO2 electrode coating prepared according to the preparation method is dense in crystal, is in gray-black, has the thickness of 100-200 mum, and is high in electrocatalysis activity and corrosion resistance.

Description

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Claims

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Application Information

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Owner KUNMING UNIV OF SCI & TECH
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