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Method for preparing composite electrode material of carbon nano-tube-graphene supercapacitor

A supercapacitor and composite electrode technology, which is applied in the field of composite electrode material preparation, can solve the problem of high temperature of graphene preparation, and achieve the effects of reducing the probability of charge annihilation, improving decomposition efficiency and high quality.

Active Publication Date: 2014-05-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the graphene prepared by the existing CVD method has a relatively high preparation temperature, and the graphene on the order of centimeters cannot be used as an electrode material in a supercapacitor, and provides a carbon nanotube-graphene composite electrode for a supercapacitor Material preparation method

Method used

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  • Method for preparing composite electrode material of carbon nano-tube-graphene supercapacitor
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  • Method for preparing composite electrode material of carbon nano-tube-graphene supercapacitor

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of a kind of carbon nanotube-graphene supercapacitor composite electrode material described in this embodiment is specifically carried out according to the following steps:

[0021] 1. Put the substrate material in the plasma-enhanced chemical vapor deposition vacuum device, evacuate to a pressure below 5Pa, feed argon gas with a gas flow rate of 10sccm-50sccm, and adjust the vacuuming speed to put the plasma-enhanced chemical vapor deposition vacuum device The medium pressure is controlled at 100Pa~300Pa, and the temperature is raised to the working temperature of 700℃~900℃ within 30min under the pressure of 100Pa~300Pa and argon atmosphere;

[0022] 2. Feed carbon source gas, adjust the gas flow ratio of carbon source gas and argon to (5-35):80, and adjust the vacuuming speed to control the pressure in the plasma-enhanced chemical vapor deposition vacuum device to 2000Pa-3000Pa, Then deposit under the conditions of radio...

specific Embodiment approach 2

[0032] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the base material described in step 1 is a silicon chip substrate material with a catalyst thin film on its surface, wherein the silicon wafer with a catalyst thin film on its surface The catalyst film in the substrate material is an iron film with a thickness of 5nm to 50nm, a cobalt film with a thickness of 5nm to 50nm or a nickel film with a thickness of 5nm to 50nm. Others are the same as in the first embodiment.

[0033] The base material described in this specific embodiment can be directly used as a collector of a supercapacitor.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the base material described in step 1 is a silicon wafer substrate material with a catalyst thin film on its surface, wherein the surface is covered with a catalyst The catalyst film in the silicon chip substrate material of the film is an iron film with a thickness of 20nm, a cobalt film with a thickness of 20nm or a nickel film with a thickness of 20nm. Others are the same as in the first or second embodiment.

[0035] The base material described in this specific embodiment can be directly used as a collector of a supercapacitor.

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Abstract

The invention relates to a method for preparing composite electrode materials, in particular to a method for preparing a composite electrode material of a carbon nano-tube-graphene supercapacitor. The method solves the problem that preparing temperature of graphene prepared through an existing CVD method is high, and the graphene of centimeter level cannot serve as the electrode material to be applied to the supercapacitor. The method comprises the steps of arranging a substrate material in a plasma enhanced chemical vapor deposition vacuum device, feeding argon, raising the temperature to 700 DEG C-900 DEG C, then feeding carbon source gas to adjust pressure intensity for deposition, after deposition is finished, stopping feeding the carbon source gas, the substrate material is cooled to below 100 DEG C, and the composite electrode material of the carbon nano-tube-graphene supercapacitor is obtained. The method is used for preparing the composite electrode material of the carbon nano-tube-graphene supercapacitor.

Description

technical field [0001] The invention relates to a preparation method of a composite electrode material. Background technique [0002] Due to the incomparable advantages of the currently widely used lithium batteries, supercapacitors can better meet people's higher-level needs for energy storage devices in today's information age. Supercapacitors have high power density, fast charge and discharge rates, and cycle The service life is more than 10,000 times, and the working temperature range is wide. Therefore, supercapacitors are currently widely used in industries such as automobiles and consumer electronics. On the road of vigorous development of supercapacitors, how to improve the energy density of supercapacitors, the development of high-performance electrode materials is one of the key technologies. At present, carbon materials are one of the ideal electrode materials for supercapacitors due to their good electrical and mechanical properties, corrosion resistance, chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36
CPCY02E60/13
Inventor 亓钧雷张夫费维栋冯吉才
Owner HARBIN INST OF TECH
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