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Preparation method of graphene supported ruthenium oxide electrode materials

An electrode material, graphene technology, applied in circuits, capacitors, electrical components, etc., can solve the problems of carbon nanotubes with poor electrochemical performance, complicated methods, and high costs

Active Publication Date: 2011-04-06
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ruthenium oxide has a high Faradaic pseudocapacitance and is a high-performance supercapacitor electrode material, but its cost is high and it is not suitable for large-scale application in supercapacitors alone
Chinese patents 200710072229.6 and 200610033782.4 proposed methods for preparing carbon nanotube-supported ruthenium oxide electrode materials, but the method of electrodepositing carbon nanotube-supported ruthenium oxide is relatively complicated, and the electrochemical performance of carbon nanotubes is far inferior to that of graphene

Method used

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  • Preparation method of graphene supported ruthenium oxide electrode materials

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Add 0.1 gram of graphite oxide into 100 milliliters of water, ultrasonically disperse for 2 hours, and form a single layer of uniformly dispersed graphene oxide colloid with a mass concentration of 1 mg / ml, and then add 0.4 mol / L concentration of Sodium hydroxide solution 1ml; Add 0.06 gram of aqueous ruthenium trichloride to 10ml water to form a ruthenium trichloride solution with a mass concentration of 6mg / ml; add all the graphene oxide colloids after adjusting the pH value to the trichlorohydrin In the ruthenium chloride solution, add 2ml of sodium hydroxide solution with a concentration of 0.4mol / L to the ruthenium trichloride mixed solution containing graphene oxide colloid, adjust the pH to 7, and then pour it into a hydrothermal kettle. heat preservation at low temperature for 6 hours, filter, wash with water, dry, and then calcinate at 150° C. for 2 hours to obtain a graphene-supported ruthenium oxide electrode material.

Embodiment 2

[0016] Add 0.1 gram of graphite oxide to 200 ml of water, and ultrasonically disperse for 2 hours to form a uniformly dispersed graphene oxide colloid with a mass concentration of 0.5 mg / ml, and then add a concentration of 0.4 mol / L to all the graphene oxide colloids 1 ml of sodium hydroxide solution; 0.06 gram of aqueous ruthenium trichloride was added to 10 ml of water to form a ruthenium trichloride solution with a mass concentration of 6 mg / ml; all the graphene oxide colloids after adjusting the pH value were added dropwise to three In the ruthenium chloride solution, add 2ml of sodium hydroxide solution with a concentration of 0.4mol / L to the ruthenium trichloride mixed solution containing graphene oxide colloid, adjust the pH to 7 and pour it into a hydrothermal kettle. heat preservation at low temperature for 6 hours, filter, wash with water, dry, and then calcinate at 150° C. for 2 hours to obtain a graphene-supported ruthenium oxide electrode material.

Embodiment 3

[0018] Add 0.1 gram of graphite oxide to 400 ml of water, and ultrasonically disperse for 2 hours to form a uniformly dispersed graphene oxide colloid with a mass concentration of 0.25 mg / ml, and then add a concentration of 0.4 mol / L to all the graphene oxide colloids 1 ml of sodium hydroxide solution; 0.06 gram of aqueous ruthenium trichloride was added to 10 ml of water to form a ruthenium trichloride solution with a mass concentration of 6 mg / ml; all the graphene oxide colloids after adjusting the pH value were added dropwise to three In the ruthenium chloride solution, add 2ml of sodium hydroxide solution with a concentration of 0.4mol / L to the ruthenium trichloride mixed solution containing graphene oxide colloid, adjust the pH to 7 and pour it into a hydrothermal kettle. heat preservation at low temperature for 6 hours, filter, wash with water, dry, and then calcinate at 150° C. for 2 hours to obtain a graphene-supported ruthenium oxide electrode material.

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Abstract

The invention provides a preparation method of graphene supported ruthenium oxide electrode materials, which comprises the following steps of: adding sodium hydroxide into graphite oxide colloid subjected to ultrasonic stripping to regulate the pH value; dripping the regulated graphite oxide colloid into a water-containing ruthenium trichloride solution; then, adding sodium hydroxide into the mixed solution to regulate the pH value to 7; filtering materials after hydro-thermal treatment; drying the materials after water washing; and obtaining the graphene supported ruthenium oxide super capacitor electrode materials after low-temperature calcinations.

Description

technical field [0001] The invention relates to a preparation method of an inorganic composite material, in particular to a preparation method of a graphene-loaded ruthenium oxide supercapacitor electrode material. Background technique [0002] Graphene is a new type of carbon material with a two-dimensional lattice structure in which carbon atoms are tightly packed, with a thickness of about 0.34 nanometers. It is the basic unit of other dimensional carbon materials. According to the number of layers, it can be divided into one-layer or few-layer graphene. Theoretical research on graphene has a history of 60 years, but the two-dimensional graphene that can truly exist independently was obtained by Novoselov et al. from the University of Manchester in the United Kingdom in 2004 by stripping highly oriented pyrolytic graphite with adhesive tape. Since its discovery, graphene has become a research hotspot as an electrode material for supercapacitors due to its excellent condu...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 陈尧马衍伟张熊张大成
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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