Graphene/Ru nano-composite material for supercapacitor and preparation method thereof

A technology of nanocomposite materials and supercapacitors, applied in the field of nanocomposite materials and their preparation, can solve the problems of reducing electrochemical capacitance value, reducing effective utilization of surface area, etc., and achieves the effects of improving utilization rate, high specific capacitance and high specific surface area
CN101714463AInactive Publication Date: 2010-05-26ZHEJIANG UNIV
0 Cites 22 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2010-05-26
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention discloses a graphene / Ru nano-composite material for a supercapacitor. The mass fraction of Ru is between 10 and 50 percent, and the mass fraction of graphene is between 90 and 50 percent. A preparation method comprises the steps of: ultrasonically dispersing oxidized graphite nano-plates into liquid polylol, and then adding solution of ruthenium chloride and solution of sodium acetate into the liquid polylol, wherein in the mixture, the content of the oxidized graphite nano-plates is between 0.5 and 1.5g / L, the concentration of the ruthenium chloride is between 0.0008 and 0.006mol / L, and the concentration of the sodium acetate is between 0.003 and 0.013mol / L; and transferring the mixture into a microwave hydrothermal reaction kettle, performing a microwave heating reaction for 5 to 10 minutes, and then obtaining the graphene / Ru nano-composite material through filtration, washing and drying. The preparation method has the advantages of energy conservation, quickness, simple process and the like; and the graphene / Ru nano-composite material which is taken as an electrode material of an electrochemical supercapacitor has high specific capacitance.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a nanocomposite material and a preparation method thereof, in particular to a graphene / Ru nanocomposite material for a supercapacitor and a preparation method thereof. Background technique

[0002] Electrochemical supercapacitors have high specific power and long cycle life, and are widely used in communication, information storage, electric vehicles and other fields. In particular, it can meet the high power requirements of electric vehicles for starting, accelerating and uphill driving, which is of great significance for optimizing the use of electric vehicle energy and prolonging the cycle life of batteries. According to the different electrode materials, electrochemical capacitors can be divided into electrochemical double-layer capacitors (EDLC) and Faraday quasi-capacitors (FPC). The working principle of EDLC is to charge and discharge through the electric double layer at the interface between the electrode and the elect...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More