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Method for preparing graphene and diamond-like carbon composite film

A graphene and diamond technology, applied in the field of preparation of graphene-diamond-like carbon composite film, to achieve the effect of easy production, simple equipment and process, and high purity

Inactive Publication Date: 2011-06-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on the preparation of graphene-diamond-like carbon composite films by liquid phase electrodeposition method is still blank at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 0.6mg of GS, 60mg of 20wt% PDDA plus high-purity water to dilute to 1wt% (GS and PDDA mass ratio is 1:2), and ultrasonically pulverize in an ultrasonic pulverizer for 30min with a power of 600W. Then separate the excess PDDA in the centrifuge, the first centrifugation speed is 300rpm, retain the upper layer turbid liquid to remove the precipitated substances, then centrifuge the upper layer turbid liquid and add appropriate amount of high-purity water at a speed of 16000rpm, remove the supernatant liquid sediment and add high-purity water for microwave ultrasonication for 10min, power 200W, After repeating the separation and ultrasonication for 3 times, replace the high-purity water with methanol and repeat the work 3 times, add the GS-PDDA finally separated by centrifugation into 500ml of anhydrous methanol, and configure a 0.005mg / ml mixed solution as an organic precursor. Weigh 120ml of GS-PDDA methanol mixture and place it in a three-necked flask, heat it in a ...

Embodiment 2

[0020] Weigh 1.5mg of GS, 50mg of 20wt% PDDA plus high-purity water to dilute to 1wt% (the mass ratio of GS and PDDA is 1:4), and ultrasonically pulverize for 30min in an ultrasonic pulverizer with a power of 600W. Then separate the excess PDDA in the centrifuge, the first centrifugation speed is 500rpm to retain the upper turbid liquid to remove the precipitated substances, then centrifuge the upper turbid liquid and add an appropriate amount of high-purity water at a speed of 15000rpm, remove the supernatant sediment and add high-purity water for microwave ultrasonication for 10min, power 200W, After repeating the separation and ultrasonication for 3 times, replace the high-purity water with methanol and repeat the work for 2 times. Add the GS-PDDA finally separated by centrifugation into 300ml of anhydrous methanol to make a 0.005mg / ml mixture, and prepare 0.005mg / ml Add methanol to dilute the GS-PDDA methanol mixture to 0.0001mg / ml, and ultrasonically disperse in a microwav...

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PUM

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Abstract

The invention discloses a method for preparing a graphene and diamond-like carbon composite film. In the method, graphene modified by methanol and polydiallyl-dimethyl ammonium chloride is used as an electrolyte precursor, reflux condensation is performed under the protection of nitrogen, a single crystal silicon chip is used as the cathode, a platinum sheet is used as the anode, and the graphene and diamond-like carbon composite film is electrodeposited through direct-current high voltage. The composite film is expected to become a novel electrode material and applied in the fields of efficient long-life batteries, capacitors and the like.

Description

technical field [0001] The invention relates to a preparation method of a graphene-diamond-like carbon composite film. Background technique [0002] As an amorphous carbon film, the mechanical, optical, electrical, chemical and tribological properties of diamond-like carbon film (DLC film for short) are similar to those of diamond. Diamond-like carbon film has the characteristics of high hardness, wear resistance, chemical inertness, low dielectric constant, wide optical band gap and good biocompatibility, and can be widely used in the fields of machinery, electronics, chemistry, military and aerospace. However, its low electrical conductivity limits its application as an electrode material. Recently, graphene (GS) is widely recognized as a good substance with unique electrical properties, and has attracted great attention as a good conductor film. However, the easy peeling of graphene films prepared by liquid phase electrodeposition also limits its development. Composite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/08
Inventor 阎兴斌薛群基杨娟
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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