Carbon nano-tube combination electrode material, its production method and electrode

Abstract

The invention relates to a combined electrode material of a carbon nanotube, a preparation method of the combined electrode material of the carbon nanotube and an electrode comprising the combined electrode material of the carbon nanotube. The combined electrode material of the carbon nanotube comprises large quantity of carbon fiber and a carbon nanotube, wherein, the large quantity of carbon fiber is lapped to form a network-like structure; the carbon nanotube intertwines or adheres to the carbon fiber. As the diameter of the carbon fiber is much larger than the diameter of the carbon nanotube, the holes in the combined electrode material of the carbon nanotube is larger than the holes of the electrode material purely formed by the carbon nanotube, so that an electrolyte or a reagent is easy to enter the holes of the combined electrode material of the carbon nanotube and fully contacts with the surface of the carbon nanotube, thus improving the capacity of a battery.

Description

technical field [0001] The invention relates to a carbon nanotube composite electrode material, a preparation method of the carbon nanotube composite electrode material and an electrode comprising the carbon nanotube composite electrode material. Background technique [0002] In recent years, portable electronic products such as notebook computers, mobile phones, and personal digital assistants have developed rapidly. higher and higher, thus placing higher demands on the secondary batteries that power them. [0003] Lithium-ion secondary batteries and lithium-ion polymer secondary batteries are the most representative secondary batteries, and their negative electrodes are usually made of carbon materials such as graphite, but graphite can no longer meet the demand. Carbon nanotubes have a large The specific surface area is therefore used to replace graphite in the negative electrode of lithium-ion batteries. However, since the diameter of pure carbon nanotubes is on the mo...

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Problems solved by technology

[0003] Lithium-ion secondary batteries and lithium-ion polymer secondary batteries are the most representative secondary batteries, and their negative electrodes are usually made of carbon materials such as graphite, but graphite can no longer meet the demand. Carbon nanotubes have a large Specific surface area, so it is used to replace graphite in the negative electrode of lithium-ion batteries

However, since the diameter of pure carbon nanotubes is on the molecular scale, the pores between carbon nanotubes are also small, so it is difficult for electrolyte or reactants to enter the pores and fully contact with the surface of carbon nanotubes, and it is difficult to play a role. Characteristics of large specific surface area of ​​carbon nanotubes

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