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Preparation method of grapheme-based electrode materials through defect initiation

A graphene-based, electrode material technology, applied in the manufacture of hybrid/electric double-layer capacitors, etc., can solve the problems of complex process, difficult to accurately grasp the degree of improvement and the mechanism of surface modification, and achieve a simple method and good cycle stability. performance, saving production cycle

Inactive Publication Date: 2015-12-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the existing problem of improving the wettability of vertically grown graphene sheets. Among them, graphene materials with different microstructures are prepared by various synthesis methods, which involve the adjustment of many parameters, and it is difficult to accurately grasp the degree of improvement and surface modification. mechanism, and the method of chemical modification involves the selection, preparation and chemical reaction of chemicals, the process is relatively complicated, and a preparation method for defect-induced graphene-based electrode materials is provided

Method used

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  • Preparation method of grapheme-based electrode materials through defect initiation
  • Preparation method of grapheme-based electrode materials through defect initiation
  • Preparation method of grapheme-based electrode materials through defect initiation

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specific Embodiment approach 1

[0018] Embodiment 1: The preparation method of a defect-induced graphene-based electrode material described in this embodiment is specifically carried out according to the following steps:

[0019] 1. Place the collector material in a plasma-enhanced chemical vapor deposition vacuum device at a temperature of 300°C to 800°C, a pressure of 200Pa to 900Pa, a radio frequency power of 75W to 225W, and an argon gas flow rate of 40sccm to 120sccm and CH 4 Under the condition that the gas flow rate of the gas is 5sccm-50sccm, the deposition time is 5min-60min, and the collector material for depositing graphene is obtained;

[0020] 2. After the deposition is over, close the CH 4 Gas, adjust the temperature until the etching temperature is 400 ℃ ~ 800 ℃, adjust the gas flow rate of argon gas to 5 sccm ~ 100 sccm, adjust the etching pressure to 50 Pa ~ 300 Pa, after turning on the plasma power, adjust the radio frequency power to 100W ~ 200W, at the same time Rotate the sample stage ...

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment differs from Embodiment 1 in that the collector material described in step 1 is metal nickel, copper, aluminum, iron, gold, platinum, nickel foam, carbon fiber cloth or graphite paper. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 2, the temperature is adjusted to an etching temperature of 400° C. to 700° C. Others are the same as in the first or second embodiment.

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Abstract

The present invention provides a preparation method of grapheme-based electrode materials through a defect initiation, and relates to a preparation method of grapheme-based electrode materials. The objective of the invention is to solve the problem that the process of the improvement of the wettability of grapheme sheets vertically grew in the prior art is relatively complicated, because the grapheme materials with different microstructures are prepared through a plurality of synthetic methods and through regulation of a plurality of parameters in such a manner that the degree of the improvement and the mechanism of the surface modification are hard to be accurately grasped, and the chemical modification methods relate to the selection, the preparation and the chemical reactions of chemical medicines. The preparation method of grapheme-based electrode materials through the defect initiation comprises: (1) depositing; (2) etching; and (3) closing a radio-frequency power supply and a heating power supply, defining Ar as a protective gas to be cooled to the room temperature, and completing the preparation method provided by the invention. The present invention is used for the preparation method of the grapheme-based electrode materials through the defect initiation.

Description

technical field [0001] The invention relates to a preparation method of a graphene-based electrode material. Background technique [0002] Graphene is a new type of carbon material with a single-layer two-dimensional honeycomb lattice structure formed by densely packed carbon atoms. , Excellent mechanical properties, is expected to be widely used in nanoelectronic devices, transparent conductive films, composite materials, catalytic materials, field emission materials, solar cell electrodes, photoelectric converters and other fields. Graphene is often studied as an electrode material for electric double layer capacitors. The three-dimensional hybrid structure graphene electrode material can effectively increase the density of graphene sheets per unit area, so that more electric double layers can be formed on the electrode surface to participate in energy storage behavior. However, graphene itself has a hexagonal structure with a stable electronic structure and low surface e...

Claims

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Application Information

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IPC IPC(8): H01G11/86
Inventor 亓钧雷林景煌刘瑜琳张骜天冯吉才
Owner HARBIN INST OF TECH
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