Graphene loaded with hollow carbon spheres composite material preparation method

A technology of composite materials and hollow carbon spheres, which is applied in the direction of graphene, nano-carbon, electrical components, etc., can solve the problems of time-consuming reaction routes, limited practical applications, and strict adoption, and achieves low cost, simple and easy method, good reproducibility

Inactive Publication Date: 2017-06-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although some progress has been made in the synthesis of graphene-hollow carbon electrode materials, expensive experimental instruments are often used in the process of preparing these materials, or harsh, complicated, and time-consuming reaction routes are used. , these problems greatly limit its practical application

Method used

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  • Graphene loaded with hollow carbon spheres composite material preparation method
  • Graphene loaded with hollow carbon spheres composite material preparation method
  • Graphene loaded with hollow carbon spheres composite material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Graphite oxide pre-oxidation

[0039] First, 120 mL of concentrated H 2 SO 4 Added to a 250mL round bottom flask under ice bath conditions, then 2.5g K 2 S 2 o 8 with 2.5g P 2 o 5 Slowly add concentrated H with stirring 2 SO 4 , then add 3g flake graphite (300 mesh) into the round bottom flask, K 2 S 2 o 8 with P 2 o 5 After completely dissolving, transfer the round-bottomed flask to an 80°C oil bath for 5 hours of reaction with continuous stirring. After the reaction, slowly inject the mixed solution into 1000mL distilled water to dilute and filter with suction. ℃ drying oven for 12h, set aside.

[0040] (2) Preparation of graphite oxide

[0041] Add 3g pre-oxidized graphite powder into 100mL concentrated sulfuric acid to dissolve, then add 7.5g KMnO 4 Slowly add to flask. The mixture was reacted in an ice bath for 2 h, transferred to 35° C. for 12 h, and then 100 mL of distilled water was added dropwise to the mixture in an ice bath. After the addit...

Embodiment 2

[0051] (1) Graphite oxide pre-oxidation

[0052] First, 100 mL of concentrated H 2 SO 4 Added to a 250mL round bottom flask under ice bath conditions, then 3g K 2 S 2 o 8 with 3g P 2 o 5 Slowly add concentrated H with stirring 2 SO 4 , then add 3g flake graphite (300 mesh) into the round bottom flask, K 2 S 2 o 8 with P 2 o 5 After completely dissolving, transfer the round-bottomed flask to an 80°C oil bath for 5 hours of reaction with continuous stirring. After the reaction, slowly inject the mixed solution into 1000mL distilled water to dilute and filter with suction. ℃ drying oven for 12h, set aside.

[0053] (2) Preparation of graphite oxide

[0054] Add 2g of pre-oxidized graphite powder into 80mL of concentrated sulfuric acid to dissolve, then add 5g of KMnO 4 Slowly add to flask. The mixture was reacted in ice bath for 2 h, transferred to 35° C. for 2 h, and then 100 mL of distilled water was added dropwise to the mixture in ice bath. After the addition...

Embodiment 3

[0064] (1) Graphite oxide pre-oxidation

[0065] First, 100 mL of concentrated H 2 SO 4 Added to a 250mL round bottom flask under ice bath conditions, then 2g K 2 S 2 o 8 with 2g P 2 o 5 Slowly add concentrated H with stirring 2 SO 4 , then add 2g flake graphite (300 mesh) into the round bottom flask, K 2 S 2 o 8 with P 2 o 5 After completely dissolving, transfer the round-bottomed flask to an 80°C oil bath for 5 hours of reaction with continuous stirring. After the reaction, slowly inject the mixed solution into 1000mL distilled water to dilute and filter with suction. ℃ drying oven for 12h, set aside.

[0066] (2) Preparation of graphite oxide

[0067]Add 3g pre-oxidized graphite powder into 100mL concentrated sulfuric acid to dissolve, then add 7.0g KMnO 4 Slowly add to flask. The mixture was reacted in ice bath for 4 h, transferred to 35° C. for 4 h, and then 100 mL of distilled water was added dropwise to the mixture in ice bath. After the addition of dis...

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Abstract

The invention provides a graphene loaded with hollow carbon spheres composite material preparation method, and belongs to the technical field of graphene composite material preparation method. The method comprises the steps of S1, pre-oxidizing graphite oxide; S2, preparing graphite oxide; S3, preparing a resorcin/formaldehyde@Sio2 precursor; S4, preparing graphene-resorcin/formaldehyde@Sio2 composite material; S5, preparing graphene-hollow carbon sphere; S6, preparing working electrodes. The carbon spheres produced by using the method present an excellent spherical structure, and are evenly distributed on the surface of the graphene. According to the hollow carbon spheres produced by using the method, the pH value and ethanol consumption can be used for effectively controlling the bore diameters of the hollow carbon spheres, have a big specific area and a good repeatability, and therefore the method is beneficial to the assembly of super conductors with a high performance.

Description

technical field [0001] The invention relates to a preparation method of a graphene-loaded hollow carbon sphere composite material, and belongs to the technical field of preparation methods of graphene composite materials. Background technique [0002] Since the 21st century, in order to solve the increasingly severe energy and environmental problems, it is a huge challenge to develop sustainable clean energy and advanced energy storage technologies. As a new type of electrical energy storage device, supercapacitors (also known as electrochemical capacitors) can provide several orders of magnitude higher energy density than traditional parallel plate capacitors, and at the same time have greater power density and better performance than batteries. of circularity. Therefore, it has been highly concerned and extensively studied by scientists in recent years. It is generally believed that electrode materials play a very important role in the performance of supercapacitors. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M10/0525C01B32/182
CPCH01M4/366H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 李欣刘静华
Owner HARBIN INST OF TECH
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