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

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...

AI Technical Summary

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-substrate structure is not good, which affects the performance of electronics, energy and other devices;

[0008]3) The non-tight combination of CNT-catalytic metal film-substrate structure will cause large heat dissipation, which will not only directly affect the efficiency and other characteristics of energy devices, but also Will accelerate the aging of the device

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