Electrode material for lithium battery and preparing method thereof
An electrode material, lithium battery technology, applied in battery electrodes, lithium storage batteries, nanotechnology for materials and surface science, etc., can solve the problems of reducing battery cycle life, electrolyte consumption and decomposition, battery burning, etc. morphological properties, inhibiting the formation of lithium dendrites, and improving safety
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[0034] An embodiment of the present invention also provides a preparation method of an electrode material for a lithium battery, the method comprising:
[0035] immersing a porous structure including a plurality of carbon nanotube fibers in a solution dispersed with porous carbon particles, so that the porous carbon particles are uniformly attached to the carbon nanotube fibers to obtain a material intermediate;
[0036] Lithium metal is deposited on the material intermediate, so that the lithium metal is filled in the porous structure and the porous carbon particles.
[0037] In one embodiment, also include:
[0038] The carbon nanotube fiber is coated with an active state material, and the active state material is located between the carbon nanotube fiber and metal lithium to improve interfacial reaction.
[0039] In one embodiment, the porous structure comprising carbon nanotube fibers is produced by a floating catalytic cracking method.
[0040] In one embodiment, it spe...
Embodiment 1
[0047] 1) Relying on the van der Waals force between carbon nanotubes, the tubular hollow carbon nanotube aggregates grown from a high-temperature furnace (refer to "Science", 2004, 304 issue, p276), under the buoyancy of the air, It is continuously wound on a cylindrical horizontal drum. While the drum is rotating, it can reciprocate along the axial direction. The moving distance is the length of the drum. After accumulating and collecting for a certain period of time, a self-supporting carbon nanotube fiber porous material is formed. The thickness is about 0.5mm.
[0048] 2) Coating Al on the carbon nanotube fiber in the form of an ultra-thin film by means of PVD, the thickness of the ultra-thin Al film is 5 nm.
[0049] 3) The obtained carbon nanotube fiber porous material is immersed in a material with an average pore diameter of 35nm and a specific surface area of 384m 2 / g of the carbon fiber microsphere dispersion, take it out after 24h and dry it to obtain the mater...
Embodiment 2
[0053] 1) With reference to the method of Example 1, relying on the van der Waals force between the carbon nanotubes, the cylindrical hollow carbon nanotube aggregates grown from the high-temperature furnace are continuously wound on the cylindrical horizontal surface under the buoyancy of the air. On the type roller, the roller can reciprocate along the axial direction while the roller is rotating. The moving distance is the length of the roller. shaft, forming a self-supporting carbon nanotube fiber porous material with a thickness of about 0.3mm.
[0054] 2) Al by means of PVD 2 o 3 Coated on carbon nanotube fibers in the form of an ultra-thin film, the ultra-thin Al 2 o 3 The thickness of the film was 5 nm.
[0055] 3) The obtained carbon nanotube fiber porous material is immersed in a material with an average pore diameter of 35nm and a specific surface area of 384m 2 / g of the carbon fiber microsphere dispersion, take it out after 24h and dry it to obtain the mate...
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Abstract
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