Ruthenium dioxide-based composite nano-material and preparation method thereof

A technology of composite nanomaterials and ruthenium dioxide, which is applied in the field of ruthenium dioxide/metal nanoparticles/carbon composite electrode materials and its preparation for supercapacitors, and can solve problems such as reducing electrochemical adsorption, affecting proton transfer, and dangerous production operations , to achieve the effect of improving energy density and power density, fast charging and discharging, and low cost

Active Publication Date: 2014-10-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material obtained by this method is a single crystal or polycrystalline film material, which has excellent electrical conductivity, but due to the lack of internal defects in the material, the transfer of protons in the material is affected, thereby reducing the possibility of electrochemical adsorption in the bulk phase of the material. sex
Simultaneously this method involves raw material RuO 4 It is flammable and explosive, volatile and not suitable for storage, which will lead to danger and difficulty in production operation

Method used

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  • Ruthenium dioxide-based composite nano-material and preparation method thereof
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  • Ruthenium dioxide-based composite nano-material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Ultrasonically disperse 4.14mg of activated carbon matrix in 20mL of water, then add 2.74mg of chloroauric acid and 4.14mg of ruthenium chloride, adjust the pH of the solution to 3, stir and absorb for 2 hours, react in an oil bath at 90°C for 2 hours, and then centrifuge , washed with ethanol and distilled water three times respectively, placed in a nitrogen-protected muffle furnace, and calcined at 350° C. to obtain the composite electrode material.

[0040] figure 1 The X-ray photoelectron spectrum of the ruthenium dioxide / metal nanoparticle / carbon composite material was obtained for this example, and the Ru3p orbital fitting results can indicate that the obtained material is a ruthenium dioxide material. figure 2 It is the fitting result of Au4f orbital, indicating that there are elemental gold particles in the composite material. image 3 It is the transmission electron microscope picture of the ruthenium dioxide / metal nanoparticle / carbon composite material. It c...

Embodiment 2

[0042] Ultrasonically disperse 0.3105 mg of activated carbon matrix in 20 mL of water, then add 0.4932 mg of chloroauric acid and 0.621 mg of ruthenium chloride to adjust the pH of the solution to 5, stir and absorb for 4 hours, react in an oil bath at 40 ° C for 3 hours, and then centrifuge , washed with ethanol and distilled water three times respectively, placed in a nitrogen-protected muffle furnace, and calcined at 200° C. to obtain the composite electrode material.

Embodiment 3

[0044] Ultrasonically disperse 2.07mg of activated carbon matrix in 20mL of water, then add 2.59mg of chloroplatinic acid and 2.07mg of ruthenium chloride, adjust the pH of the solution to 3, stir and absorb for 6 hours, react in an oil bath at 60°C for 4 hours, and then centrifuge , washed with ethanol and distilled water three times respectively, placed in a nitrogen-protected muffle furnace, and calcined at 250° C. to obtain the composite electrode material.

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Abstract

The invention discloses ruthenium dioxide-based composite nano-material and a preparation method thereof. The preparation method includes that dispersing carbon matrix in water, adding ruthenium source and oxidized metal source, regulating the pH value of the solution, after stirring to adsorb, performing oil bath reaction, centrifuging, washing, and roasting in an inert atmosphere to obtain the composite nano-material. The preparation method is easy to operate, high in yield, low in cost and environmental friendly, and the prepared ruthenium dioxide / metal nano-particle / carbon composite nano-material is featured with small active ingredient size, large specific surface area and uniform dispersion. The ruthenium dioxide is hydrous ruthenium dioxide which belongs to good reversible charging / discharging active substances, and the metal nano-particle is easy to adsorb protons and transmit electrons to improve the electro-chemical performance of the ruthenium dioxide / metal nano-particle / carbon composite nano-material. The ruthenium dioxide / metal nano-particle / carbon composite nano-material can be used as super-capacitor electrode material and has excellent electro-chemical performance.

Description

technical field [0001] The invention belongs to the field of electrochemistry and inorganic materials, in particular to a ruthenium dioxide / metal nanoparticle / carbon composite electrode material for a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors (also known as electrochemical capacitors) have attracted widespread attention due to their high power density, high energy density and long cycle life. Supercapacitors mainly rely on the fast and reversible Faradaic reaction or quasi- Faraday reaction for energy storage. At present, the main research electrode materials are mesoporous carbon materials, hydrated metal oxides, conductive polymers and their composites. Carbon materials store energy based on the electric double layer capacitance generated by charge separation on the carbon electrode / electrolyte interface, while RuO 2 Isooxides rely on the adsorption capacitance generated by the redox reaction on the oxide surface or in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24B82Y30/00B82Y40/00
CPCY02E60/13
Inventor 谭强强王鹏飞徐宇兴
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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