Method for directly growing carbon nanotube on foamed nickel substrate so as to prepare battery electrodes

A carbon nanotube, battery electrode technology, applied in the direction of alkaline battery electrodes, etc., can solve the problems affecting device performance and life, large heat dissipation, accelerated device aging, etc., to improve performance and life, excellent electrical conductivity, increase The effect of specific surface area

Active Publication Date: 2015-04-29
WENZHOU UNIVERSITY
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Problems solved by technology

[0006]1) In terms of structure and performance, it is difficult to form a strong organic bond between CNT-catalyzed metal film-substrate, and the CNT film is easy to fall off under the impact of different application conditions , which directly affects the performance and life of the device;
[0007]2) The conductivity of the CNT-catalyzed metal film-substrat

Method used

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  • Method for directly growing carbon nanotube on foamed nickel substrate so as to prepare battery electrodes
  • Method for directly growing carbon nanotube on foamed nickel substrate so as to prepare battery electrodes
  • Method for directly growing carbon nanotube on foamed nickel substrate so as to prepare battery electrodes

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Embodiment

[0041] The method for directly growing carbon nanotubes on a nickel-containing metal substrate and preparing electrodes for nickel-metal hydride batteries in the CVD reaction device includes the following steps:

[0042] (1) Perform chemical and ultrasonic cleaning on the nickel-containing metal substrate. In this embodiment, the nickel-containing metal substrate is nickel foam;

[0043] (2) Set up a CVD reaction device, and perform chemical vapor reaction growth of carbon nanotubes on nickel-containing metal substrates in the CVD reaction device. The CVD reaction device includes a quartz heating furnace and an air inlet channel arranged on one side of the quartz heating furnace , and a vacuum pump arranged at the other end of the quartz heating furnace, the nickel-containing metal substrate is carried by a quartz tray and placed in the middle of the quartz heating furnace, and the quartz heating furnace is pumped to a vacuum state with a pressure <1 Torr by the vacuum pump,...

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Abstract

The invention discloses a method for directly growing a carbon nanotube on a foamed nickel substrate so as to prepare battery electrodes. The method comprises the following steps: (1) performing chemical and ultrasonic cleaning by taking foamed nickel as a catalysis and substrate material for chemical vapor deposition reaction of the carbon nanotube; and (2) setting a CVD reaction device, directly performing the chemical vapor deposition growth of the carbon nanotube on the foamed nickel substrate in the CVD reaction device, the flow ratio between a hydrocarbon gas and a carrier gas is (10-40sccm):(100-400sccm) when the growth temperature is at 600-900DEG C, the growth pressure is at 1-760Torr, and the growth time lasts for 1-30min. The method has the advantages that the significant role in enhancing the performance of a battery device can be achieved, the specific surface area and the electrochemical activity of the CNT-foamed nickel substrate can be obviously improved, and the cycle life of the CNT-foamed nickel substrate nickel-hydrogen battery can be obviously prolonged.

Description

technical field [0001] The invention belongs to the application field of carbon nanotubes, and specifically refers to a method for directly growing carbon nanotubes on a foamed nickel substrate to prepare foamed nickel battery electrodes. Background technique [0002] Nickel foam has excellent catalytic activity, porous structure, and large surface area. In various battery energy devices such as nickel-metal hydride batteries and supercapacitors, nickel foam is an important material for preparing battery electrodes. Improving the catalytic activity, porosity, and conductivity of nickel foam is of great significance for enhancing the performance of battery devices. [0003] Carbon nanotubes (CNTs) have typical layered hollow structure characteristics, high aspect ratio, high mechanical strength, and stable chemical properties, making their applications in the field of battery energy devices widely concerned and studied. Therefore, combining CNTs with nickel foam is an effect...

Claims

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Application Information

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IPC IPC(8): H01M4/28
CPCH01M4/28Y02E60/10
Inventor 董长昆谢非翟莹钱维金
Owner WENZHOU UNIVERSITY
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