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A metal-based array carbon nanotube electrode material without a transition layer support and its preparation method and application

A carbon nanotube and electrode material technology, applied in the directions of carbon nanotubes, nanocarbons, non-metallic elements, etc., can solve the problems of complex preparation process, affecting the application of metal-based array carbon tubes, poor conductivity of transition layer, etc., and achieves simple preparation. , excellent electrochemical performance, strong adhesion effect

Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Comparing the above literature reports, we found one thing in common, that is, before preparing carbon tubes on metal substrates, a transition layer must be deposited or evaporated on it, and then catalyst deposition and carbon tubes can be grown. This method makes The preparation process becomes complicated, and due to the poor conductivity of the transition layer, it affects the further application of metal matrix array carbon tubes in energy storage devices

Method used

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  • A metal-based array carbon nanotube electrode material without a transition layer support and its preparation method and application
  • A metal-based array carbon nanotube electrode material without a transition layer support and its preparation method and application
  • A metal-based array carbon nanotube electrode material without a transition layer support and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing a metal-based array carbon nanotube electrode material supported by a transition layer, comprising the following steps:

[0032] Step 1: use the through-hole aluminum foil obtained by electrochemical corrosion with an acidic electrolyte as the metal substrate for growing arrayed carbon nanotubes. The metal substrate is ultrasonically cleaned in acetone, alcohol and deionized water in sequence, then dried and set aside;

[0033] Step 2: dissolving ferrocene in xylene solution to form a solution with a ferrocene concentration of 0.06 g / ml, which is used as a catalyst for subsequent use;

[0034] Step 3: Place the metal substrate treated in step 1 in the constant temperature zone of the tube furnace, seal the nozzle of the quartz tube at the same time, and raise the tube furnace under the carrier gas atmosphere with the ratio of argon to hydrogen at 8:2 to 600°C (the growth temperature required for the cracking reaction), and then pass through the ca...

Embodiment 2

[0038]The difference from the parameter conditions in the preparation method of Example 1 is: the concentration of the catalyst is 0.1 g / ml; the cracking reaction growth temperature required for adjusting the tube furnace is 620° C., and the cracking reaction growth time is 3 min. Other conditional parameters are with embodiment 1.

[0039] The metal-based array carbon nanotubes prepared without transition layer support were assembled into supercapacitors as electrode materials, and the assembly sequence was as follows: positive electrode shell + positive electrode material (aluminum-based array carbon tubes) + separator + electrolyte + negative electrode material (aluminum-based array carbon tube) + gasket + negative shell. The assembled device was tested by Princeton Electrochemical Workstation for performance tests such as cyclic voltammetry, impedance, constant current charge and discharge, and cycle stability. The test results are as follows:

[0040] The cyclic voltamme...

Embodiment 3

[0042] The parameters and conditions in the preparation method of Example 1 are different: the concentration of the catalyst is 0.1g / ml; the ratio of argon to hydrogen is 6:4; The time is 5 minutes. Other conditional parameters are with embodiment 1.

[0043] The metal-based array carbon nanotubes prepared without transition layer support were assembled into supercapacitors as electrode materials, and the assembly sequence was as follows: positive electrode shell + positive electrode material (aluminum-based array carbon tubes) + separator + electrolyte + negative electrode material (aluminum-based array carbon tube) + gasket + negative shell. The assembled device was tested by Princeton Electrochemical Workstation for performance tests such as cyclic voltammetry, impedance, constant current charge and discharge, and cycle stability. The test results are as follows:

[0044] The cyclic voltammetry characteristic curve of the arrayed carbon nanotubes prepared in this embodime...

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Abstract

The invention discloses a method for preparing a metal-based array carbon nanotube electrode material supported by a transition layer, which comprises the following steps: 1) placing a metal substrate for growing array carbon nanotubes in a constant temperature zone of a tube furnace, and simultaneously placing a quartz Seal the nozzle of the tube and raise the tube furnace to the set temperature under the carrier gas atmosphere; 2) Pass the carbon source and the catalyst into the reaction tube of the tube furnace at the same time, the catalyst is first cracked and nucleated on the metal substrate, and then The carbon source is cracked on the cracked catalyst particles and the arrayed carbon nanotubes are grown directly, so that a metal-based arrayed carbon nanotube electrode material without transition layer support is prepared. The invention uses the chemical vapor deposition method to directly prepare the vertical array carbon nanotube electrode material on the metal substrate, and does not need to deposit a transition layer on the substrate before depositing the catalyst. This makes the adhesion between the vertical array carbon nanotube material and the substrate stronger, and can greatly reduce the contact resistance between the substrate and the electrode material.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube electrode material preparation, and relates to a metal-based array carbon nanotube electrode material without a transition layer support and a preparation method and application thereof. Background technique [0002] As a new type of energy storage device, supercapacitor has excellent characteristics such as high power density, fast charging rate, long cycle life, wide operating temperature range, excellent low temperature performance and environmental protection, and has broad application prospects in many fields. Electrode materials are one of the key factors determining the electrochemical performance of supercapacitors, so the development of electrode materials with excellent characteristics is the core of supercapacitor research. Carbon nanomaterials, especially arrayed carbon nanotubes, are nanomaterials with a unique hollow tubular structure. Because of their high specific surface a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/162H01G11/24H01G11/36H01G11/30
CPCC01B2202/22C01B2202/32C01B32/162H01G11/24H01G11/30H01G11/36Y02E60/13
Inventor 杜显锋黄珊熊礼龙
Owner XI AN JIAOTONG UNIV
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