Method for preparing composite of grapheme with different oxidation degrees and manganese dioxide

A technology of manganese dioxide and oxidation degree, which is applied in capacitors, circuits, electrolytic capacitors, etc., can solve the problems that the application of graphene and nano-manganese dioxide composite electrodes has not been found, and achieve obvious supercapacitive performance, low energy consumption, and simple operation Effect
CN102709057AInactive Publication Date: 2012-10-03TIANJIN UNIV
2 Cites 22 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2012-10-03
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for preparing composite of grapheme with different oxidation degrees and manganese dioxide. The method comprises the processes of: respectively carrying out low-temperature, intermediate-temperature and high-temperature subsection reactions on original graphite, and concentrated sulfuric acid with a mass concentration of 98% and potassium permanganate so as to obtain graphite oxide; dispersing the graphite oxide in de-ionized water, and reducing the prepared graphite oxide with hydrazine hydrate so as to obtain the grapheme oxide with different oxidation degrees by controlling reduction time; and mixing the grapheme oxide with MnCl2*4H2O in an isopropyl alcohol solution, and adding a water solution of the potassium permanganate to prepare the composite of the grapheme with the different oxidation degrees and the manganese dioxide through oxidation reduction. The method provided by the invention has the advantages as follows: materials used in the method are rich in storage amount and low in cost, so that the method is good in commercialization; an dispersing agent, a stabilizer and the like do not need to be added, and a pure chemical technology is used, so that simple operation, no pollution and low energy consumption can be realized; and the prepared composite material of the grapheme and the manganese dioxide has high purity and good stability.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a preparation method of graphene and manganese dioxide composites with different oxidation degrees, which belongs to the composite technology of carbon materials and metal oxides. Background technique

[0002] Graphene is a single-layer or multi-layer extremely thin graphite material discovered in recent years. It has been prepared by mechanical exfoliation since 2004 by Andre K. Heim and Konstantin Novoselov of the University of Manchester, UK. After producing a single-layer graphite sheet with a thickness of about 1nm and winning the Nobel Prize in Physics in 2010, it caused a research boom all over the world. Graphene is the construction of zero-dimensional fullerene, one-dimensional carbon nanotubes, three-dimensional bulk graphite and other sp 2 The basic structural unit of hybrid carbon. Graphene has many unique properties, such as excellent electrical properties, mechanical properties and thermal properties, and its sp...

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