Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Reduced graphene oxide/manganese oxide compound and preparation method thereof

A technology of composites and nanocomposites, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems that have not attracted the attention of scientific researchers

Active Publication Date: 2017-08-29
深圳凯烽达科技有限公司
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, starting from the manganese source added during the synthesis of graphene oxide without adding additional manganese source to synthesize manganese oxide / graphene composites with coexistence of multiple valence states has not attracted the attention of scientific researchers.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reduced graphene oxide/manganese oxide compound and preparation method thereof
  • Reduced graphene oxide/manganese oxide compound and preparation method thereof
  • Reduced graphene oxide/manganese oxide compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A rGO / MnO x The preparation method of nanocomposite, the steps are as follows:

[0071] (1) Mix 1 g of expanded graphite and 20 mL of concentrated sulfuric acid, and stir the mixture at 0 °C for 12 h to obtain a mixed solution A.

[0072] (2) Add 3 g of potassium permanganate to the mixed solution A. After the addition is complete, stir at 0 °C for 2 h, then at 40 °C for 1 h to obtain the mixed solution B.

[0073] (3) Carefully add 120 mL of warm water at 70 °C to the mixture B, and then add 30 mL of 30 wt% hydrogen peroxide to obtain a bright yellow GO sol.

[0074] (4) Add potassium hydroxide aqueous solution dropwise to the GO sol under stirring, adjust the pH of the GO sol to 3, centrifuge, wash and centrifuge the pH-adjusted GO sol, repeat the operation 3 times to obtain solid C, and freeze the solid C Dry (‒(40‒50) °C, < 200Pa) to obtain solid D.

[0075] (5) The solid D was heat-treated at 450 °C for 2 h under a nitrogen atmosphere, and then naturally cooled ...

Embodiment 2

[0077] A rGO / MnO x The preparation method of nanocomposite, the steps are as follows:

[0078] (1) Mix 1 g of expanded graphite and 20 mL of concentrated sulfuric acid, and stir the mixture at 2 °C for 12 h to obtain a mixed solution A.

[0079] (2) Add 3 g of potassium permanganate to the mixed solution A. After the addition is complete, stir at 2 °C for 2 h, then at 40 °C for 1 h to obtain the mixed solution B.

[0080] (3) Carefully add 150 mL of warm water at 60 °C to the mixture B, and then add 20 mL of 30 wt% hydrogen peroxide to obtain a bright yellow GO sol.

[0081] (4) Add sodium hydroxide aqueous solution dropwise to the GO sol under stirring, adjust the pH of the GO sol to 5, centrifuge, wash and centrifuge the pH-adjusted GO sol, repeat the operation twice to obtain solid C, and freeze the solid C Dry (‒(40‒50) °C, < 200Pa) to obtain solid D.

[0082] (5) The solid D was heat-treated at 450 °C for 2 h under a nitrogen atmosphere, and then naturally cooled to ro...

Embodiment 3

[0084] A rGO / MnO x The preparation method of nanocomposite, the steps are as follows:

[0085] (1) Mix 1 g of expanded graphite and 20 mL of concentrated sulfuric acid, and stir the mixture at 0 °C for 12 h to obtain a mixed solution A.

[0086] (2) Add 4 g of potassium permanganate to the mixed solution A. After the addition is complete, stir at 0 °C for 2 h, then at 40 °C for 1 h to obtain the mixed solution B.

[0087] (3) Carefully add 180 mL of warm water at 60 °C to the mixture B, and then add 20 mL of 30 wt% hydrogen peroxide to obtain a bright yellow GO sol.

[0088] (4) Add ethylamine aqueous solution dropwise to the GO sol under stirring, adjust the pH of the GO sol to 7, centrifuge, wash and centrifuge the pH-adjusted GO sol, repeat the operation twice to obtain solid C, and freeze-dry the solid C (‒(40‒50) °C, < 200 Pa), to obtain solid D.

[0089] (5) The solid D was heat-treated at 450 °C for 2 h under a nitrogen atmosphere, and then naturally cooled to room t...

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

PUM

No PUM Login to View More

Abstract

The invention relates to a reduced graphene oxide / manganese oxide compound and a preparation method thereof, and belongs to the technical field of preparation of nano-compound materials and super-capacitor electrode materials. An rGO / MnO<x> nano-compound is composed of an rGO nanosheet and MnO<x> particles embedded on the nanosheet; the size of the MnO<x> particles is 10-90 nm; x in the MnO<x> is 1.33-2; the mass percentage content of the MnO<x> is 20-40%; and the MnO<x> component is a mixture that MnO<2>, Mn<3>O<4> and Mn<2>O<3> coexist. The invention further provides a preparation method of the reduced graphene oxide / manganese oxide compound and the purpose therefore, used for the electrode material of a super-capacitor. An rGO / MnO<x> nano-compound synthesis method is simple and low in cost; scale industrial production is facilitated; and the rGO / MnO<x> nano-compound has relatively high specific discharge capacity and good rate capability, and is suitable for being used as the electrode material of the super-capacitor.

Description

technical field [0001] The invention relates to a reduced graphene oxide / manganese oxide composite and a preparation method thereof, belonging to the technical field of preparation of nanocomposite materials and supercapacitor electrode materials. Background technique [0002] Since its discovery in 2004, graphene has attracted extensive attention from researchers due to its excellent mechanical, electronic, and physical and chemical properties ( science , 2004, 306, 666–669). So far, people have developed a variety of methods to prepare graphene, such as graphite exfoliation method, chemical vapor deposition method, arc discharge method, solvothermal method and graphene oxide reduction method ( Nat. Nanotechnol. , 2008, 3, 563‒668; science , 2009, 324, 1312–1314; Angew. Chem. Int. Ed. , 2014, 53, 2398–2401; Energy Environ. Sci. , 2013, 6, 1185–1191.), among which the graphene oxide reduction method is the most common, because the method is simple, low in cost, and ...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/46H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/46H01G11/86
Inventor 盖利刚栾振红姜海辉班青
Owner 深圳凯烽达科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products