Nanocarbon composite structure having ruthenium oxide trapped therein

一种氧化钌、纳米碳的技术，应用在内包氧化钌的纳米碳复合结构体领域，能够解决不能实用、未记载材料容量密度等问题，达到高容量、高电化学活性的效果

Inactive Publication Date: 2007-05-16
NAT UNIV CORP TOKYO UNIV OF AGRI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, along with the charge-discharge cycle, the ruthenium hydroxide hydrate is likely to dissolve into the aqueous electrolyte
In addition, in this report, although the capacity per unit weight of ruthenium is described, the capacity density per unit weight of the material (the powder carrying ruthenium hydroxide hydrate) is not described.
However, since the ruthenium content in the sheet electrode is as little as 3.82% by weight, the value per unit weight of the material is extremely small, and it is presumed that it is far from being practical.

Method used

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  • Nanocarbon composite structure having ruthenium oxide trapped therein
  • Nanocarbon composite structure having ruthenium oxide trapped therein
  • Nanocarbon composite structure having ruthenium oxide trapped therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In a centrifugal treatment device, the above-mentioned hollow nanocarbon (Ketjen Black, manufactured by KETJEN BLACK INTERNATIONAL, trade name: KETJEN BLACK EC600JD, porosity 78 Vol.%, primary particle diameter 40nm, average secondary particle diameter 337.8nm) was highly dispersed , adding a 10 mM ruthenium chloride aqueous solution to it, and continuing to make it highly dispersed, thereby preparing a precursor for adsorbing ruthenium chloride inside and outside the hollow nanocarbon. A 30 mM sodium hydroxide aqueous solution was added thereto to bring the pH to 7, centrifuged at a centrifugal force of 75,000 G for 10 minutes, and a ruthenium oxide-encapsulated nanocarbon composite structure was obtained by performing a surface sol-gel reaction.

[0064] The obtained nano-carbon composite structure containing ruthenium oxide is filtered with an aspirator, a suction filter bottle, and a folded filter, and dried at 100°C for 6 hours to obtain 0.5 hydrated ruthenium oxide...

Embodiment 2

[0067] Except that the centrifugation time of the surface sol-gel reaction in Example 1 was set to 20 minutes, the others were carried out in the same manner as in Example 1 to obtain a nano-carbon composite structure powder (sample B) enclosing ruthenium oxide. The TEM image of sample B is shown in FIG. 4 .

[0068] As can be seen from FIG. 4 , the hollow nanocarbon with a primary particle diameter of about 20 nm forms an aggregate, and its secondary particle diameter is about 200 to 300 nm. Compared with sample A, the ruthenium oxide nanodots (average diameter 1nm) enclosed in the hollow nanocarbon are more cohesive. In addition, the graphene layer forming the primary particle of the hollow nanocarbon is temporarily destroyed and rearranged, so the spherical disintegration.

[0069] [measurement evaluation]

[0070] For the samples obtained in Example 1 (sample A) and Example 2 (sample B), the average particle diameter of the primary particles, the average particle diameter...

Embodiment 3

[0079] Except that the centrifugal treatment in Example 1 was set to 45000G and 10 minutes, it carried out similarly to Example 1, and obtained the nano-carbon composite structure powder (sample C) containing ruthenium oxide. The obtained sample C was evaluated in the same way as sample A and sample B. As a result, the average secondary particle diameter was 380 nm, the average primary particle diameter was 30 nm, and the average particle diameter of ruthenium oxide particles was 10 nm. In addition, the specific electrostatic capacity was 300 F / g.

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Abstract

A novel nanocarbon composite structure having ruthenium oxide trapped therein, wherein using Ketjen black, through a mechanochemical effect utilizing an ultracentrifugal reaction field, both the specific surface area of ruthenium oxide and the space of electrode material have been expanded so as to have nanoparticles of ruthenium oxide highly dispersed in a graphene layer. This nanocarbon composite structure having ruthenium oxide trapped therein exhibits high electrochemical activity, so that it is suitable for use as an electrical energy storing device, such as a large-capacity capacitor.

Description

technical field [0001] The present invention relates to a new nano-carbon composite structure containing ruthenium oxide. More specifically, it relates to an electric storage element suitable for use as a capacitor for electric vehicles, an electric storage element for the electric power industry, a fuel cell or a solar cell, etc. Nano-carbon composite structure containing ruthenium oxide with high electrochemical activity for electric energy storage elements such as capacitors used in emergency power supplies or backup power supplies. Background technique [0002] Ruthenium oxide hydrate has attracted much attention as an electrode material for next-generation supercapacitors and has been widely reported. For example, T.R. Jow et al. reported that a hydrated ruthenium oxide was formed into nanoparticles (100 nm in diameter) by a sol-gel method to obtain a large capacity (600 to 700 F / g) (see Non-Patent Document 1). [0003] In addition, regarding the problem of slow proton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00B82Y99/00C01G55/00H01G9/00H01G11/02H01G11/22H01G11/24H01G11/30H01G11/32H01G11/46H01M8/00
CPCY10S977/755C01P2004/16Y02T10/7022Y02E60/13C01B31/0293H01G11/36Y10S977/811C01P2004/64C01P2006/40C01P2004/04C01G55/00B82Y40/00H01G9/058B82Y30/00H01G11/46C01B32/18Y02T10/70H01G11/22
Inventor 直井胜彦
Owner NAT UNIV CORP TOKYO UNIV OF AGRI & TECH
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