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High-conductivity graphene and graphene conducting film, and preparation method thereof

A graphene, high conductivity technology, applied in the field of materials, can solve the problems of limited electrode surface modification methods, complicated production process, expensive silver, etc., to achieve easy recycling and harmless treatment, high production efficiency, conductivity and film formation good sex effect

Inactive Publication Date: 2014-01-22
包头市金六环矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme can construct a substrate electrode with good chemical stability and electrochemical performance, but there are disadvantages such as relatively complicated production process, expensive silver consumption, and limited electrode surface modification methods.

Method used

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  • High-conductivity graphene and graphene conducting film, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 10mL of 98% (mass percentage) sulfuric acid into a 100mL round bottom bottle, heat the oil bath to 120°C, and slowly add 0.2g of potassium peroxodisulfate and 2g of phosphorus pentoxide until completely dissolved under stirring conditions, then lower the temperature Lower to 100°C, slowly add 1 gram of graphite powder, react for 10 hours, dilute the reaction mixture 50 times with water, wash on a mixed cellulose filter membrane with a pore size of 0.22 μm until the filtrate is neutral, and then place it in 200 mL of 38% (mass percentage) Stir in hydrochloric acid for more than 12 hours to remove excess mixed oxidant, dilute the reaction mixture 50 times with water, wash with water on a mixed cellulose filter membrane with a pore size of 0.22 μm until the filtrate is neutral, and dry the solid product at 60°C for 5 hours to obtain the prepared product. Graphite oxide powder.

Embodiment 2

[0034] Add 200mL of 98% (mass percentage) sulfuric acid into a 500mL round bottom bottle, heat the oil bath to 60°C, and slowly add 5g of potassium dichromate and 10g of phosphorus pentoxide until they are completely dissolved under stirring conditions, and then lower the temperature Cool down to 40°C, slowly add 10 grams of graphite powder, react for 10 hours, dilute the reaction mixture 50 times with water and wash it on a mixed cellulose filter membrane with a pore size of 0.22 μm until the filtrate is neutral, then place it in 200 mL of 38% (mass percentage) Stir in hydrochloric acid for more than 12 hours to remove excess mixed oxidant, dilute the reaction mixture 50 times with water, wash with water on a mixed cellulose filter membrane with a pore size of 0.22 μm until the filtrate is neutral, and dry the solid product at 60°C for 5 hours to obtain the prepared product. Graphite oxide powder.

Embodiment 3

[0036] Add 100mL of 98% (mass percentage) sulfuric acid into a 200mL round bottom bottle, heat the oil bath to 180°C, and slowly add 10g of cerium oxide and 1g of phosphorus pentoxide until completely dissolved under stirring conditions, then lower the temperature to To 160°C, add 5 grams of graphite powder slowly, react for 1 hour, dilute the reaction mixture 50 times with water and wash it on a mixed cellulose filter membrane with a pore size of 0.22 μm until the filtrate is neutral, then place it in 200 mL of 38% (mass percentage) hydrochloric acid Stir in medium for more than 12 hours to remove excess mixed oxidant, dilute the reaction mixture 50 times with water, wash with water on a mixed cellulose filter membrane with a pore size of 0.22 μm until the filtrate is neutral, and dry the solid product at 60°C for 5 hours to obtain preoxidation graphite powder.

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Abstract

The invention discloses a high-conductivity graphene and a graphene conducting film, and a preparation method thereof, belonging to the field of materials. The method comprises the following steps: carrying out blending and mechanical grinding on preoxidized graphite powder prepared by a concentrated acid oxidization process and disazo dyes to prepare the high-conductivity graphene; and dispersing the high-conductivity graphene in a solvent, forming a graphene film on a substrate surface by a film-forming process, and forming the graphene conducting film from the graphene film by a surface treatment process. The preparation method has the advantages of simpleness, mild preparation conditions, controllable technological parameters, high yield and low production cost. The high-conductivity graphene has the advantages of high solvent dispersivity, high stripping efficiency, favorable film-forming property and favorable conductivity; and the graphene conducting film has the advantages of low resistance, wide substrate applicability, favorable mechanical properties and high biocompatibility, and has wide application prospects in the fields of lithium ion batteries, solar cells, super capacitors, electromagnetic shielding, antistatic, biosensing, low-cost light-permeable electrodes and the like.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a highly conductive graphene, a graphene conductive film and a preparation method thereof. Background technique [0002] Since it was successfully separated for the first time in 2004, graphene has fully demonstrated its great advantages in theoretical research and practical applications in a short period of time, and quickly set off a research boom in the fields of condensed matter physics and material science. The preparation and film-forming technology of highly conductive, solvent-dispersible graphene is an important prerequisite for the large-scale application of graphene, and the research on this aspect is very active. At present, the preparation methods of graphene mainly include the following six methods: (1) dry mechanical exfoliation method; (2) carbon nanotube splitting method; (3) epitaxial growth method; (4) chemical vapor deposition method; (5) Organic solvent ultrasonic str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01B5/00H01B13/00C01B32/19
Inventor 胡成国胡胜水杨宁馨孙哲
Owner 包头市金六环矿业有限责任公司
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