Preparation method of graphene-loaded metal oxide electrode material

A technology for loading metals and electrode materials, applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, hybrid capacitor current collectors, etc., can solve the problems of unsuitability for large-scale applications, low production efficiency, and low spray rate

Inactive Publication Date: 2020-07-07
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned electrospray method not only has an extremely low spraying rate, but also requires a long time of annealing to obtain the final electrode material, so the production efficiency is too low to be suitable for large-scale applications

Method used

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  • Preparation method of graphene-loaded metal oxide electrode material
  • Preparation method of graphene-loaded metal oxide electrode material
  • Preparation method of graphene-loaded metal oxide electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] [Example 1] rGO / NiCo 2 o 4 Compound electrode

[0026] Step 1. Configuration of GO aqueous solution

[0027] 200 mL of GO aqueous solution with a concentration of 0.7 mg / mL was prepared with a GO raw material slurry with a concentration of 1 wt %;

[0028] Step 2. Preparation of precursor solution

[0029] Taking the mass ratio of GO to metal salt as 1:5 as an example, weigh 0.23g of Ni(NO 3 ) 2 ·6H 2 O and 0.46g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 16mL of ethanol and 64mL of ethylene glycol, and then 200mL of the above-mentioned GO aqueous solution was added; mixed for 2h under the assistance of ultrasound to obtain a uniform precursor mixed solution;

[0030] Step 3. Sample Preparation

[0031] First, fix the nickel foam on the surface of the heating table and heat it to 400°C; after that, put the prepared precursor mixed solution into the syringe, and set the liquid feeding speed to 0.5mL / min, and the carrier gas pressure to 0.2MPa, adjust the power of...

Embodiment 2

[0039] [Example 2] rGO / NiFe 2 o 4 Compound electrode

[0040] Step 1. Configuration of GO aqueous solution

[0041] 200 mL of GO aqueous solution with a concentration of 0.1 mg / mL was prepared with a concentration of 1 wt % GO raw material slurry;

[0042] Step 2. Preparation of precursor solution

[0043] Taking the mass ratio of GO to metal salt as 1:10 as an example, weigh 0.47g of Ni(NO 3 ) 2 ·6H 2 O and 0.94g of Fe(NO 3 ) 2 9H 2 O was dissolved in 16 mL of ethanol and 64 mL of ethylene glycol, and then 200 mL of the above-mentioned GO aqueous solution was added, and mixed for 2 h under the assistance of ultrasound to obtain a uniform precursor mixed solution;

[0044] Step 3. Sample Preparation

[0045] First, fix the copper foam on the surface of the heating table and heat it to 350°C; after that, put the prepared precursor mixed solution into the syringe, and set the liquid feeding speed to 0.3mL / min, and the carrier gas pressure to 0.15MPa, adjust the power ...

Embodiment 3

[0047] [Example 3] rGO / CoO composite electrode

[0048] Step 1. Configuration of GO aqueous solution

[0049] 200 mL of GO aqueous solution with a concentration of 0.35 mg / mL was prepared with a GO raw material slurry with a concentration of 1 wt %;

[0050] Step 2. Preparation of precursor solution

[0051] Taking the mass ratio of GO and metal salt as 1:15 as an example, weigh 2.1g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 80mL ethanol, and then 200mL of the above-mentioned GO aqueous solution was added, and mixed for 2h under the assistance of ultrasound to obtain a uniform precursor mixed solution;

[0052] Step 3. Sample Preparation

[0053] First, the cleaned copper foil was fixed on the surface of the heating table, and heated to 500 °C; after that, the prepared precursor mixed solution was filled into the syringe, and the liquid feeding speed was set to 0.1 mL / min. The air pressure is set to 0.1MPa, and the power of the ultrasonic atomizing nozzle is adjusted betwe...

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Abstract

The invention discloses a preparation method of a graphene-loaded metal oxide electrode material, and the method comprises the following steps: dissolving a metal salt in a mixed solution of ethanoland ethylene glycol, adding a graphene oxide aqueous solution into the mixed solution, and carrying out ultrasonic treatment to obtain a uniform GO / metal salt suspension; taking cleaned foamed nickel,foamy copper and the like and aluminum foil or copper foil as a substrate and a current collector, and coating the suspension on the metal surface through an ultrasonic spraying method to obtain thegraphene-loaded metal oxide electrode material. The metal oxide formed in situ is uniformly distributed on the surface of the graphene, and the electrode material shows good pseudocapacitance performance. According to the invention, a binder is not used, annealing treatment is not needed, the electrode preparation process is simple, and batch preparation is easy to realize.

Description

technical field [0001] The invention relates to a method for preparing a graphene-loaded metal oxide electrode material, which belongs to the technical field of graphene composite material preparation. Background technique [0002] With the development of modern science and technology, energy and environmental issues have gradually become important issues for the sustainable development of human society. Traditional fossil fuels not only have limited reserves, but also the exhaust gas generated by combustion will seriously pollute the environment and cause the greenhouse effect. Therefore, clean and renewable new energy technologies have become the focus of attention. Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage device between traditional capacitors and secondary batteries. It has fast charging and discharging speed, long cycle life, wide temperature range, high safety, and environmental protection. and other advantages, so it has...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/32H01G11/46H01G11/70H01G11/86
CPCH01G11/26H01G11/32H01G11/46H01G11/70H01G11/86
Inventor 赵斌石中婷詹科严雅
Owner UNIV OF SHANGHAI FOR SCI & TECH
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