Preparation method of lithium battery anode material

Abstract

The invention relates to a preparation method of a lithium battery anode material. A SnO2@ / C composite material which contains fibers and adopts a hollow structure can be prepared with the method, SnO2 has enough buffering space in the charging and discharging process due to the fibers adopting the hollow structure, a C outer layer can serve as a network framework of SnO2, efflorescence of the material is reduced, the conductivity of the material is improved, the one-step method for preparation of SnO2@ / SiO2@ / C composite fibers is not as complicated as a traditional method in which fibers are coated after being prepared, and the SnO2@C nanofibers prepared with the method have good cyclic stability.

Description

technical field

[0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a method for preparing negative electrode materials of lithium-ion batteries. Background technique

[0002] With the rapid development of products such as mobile phones, 3C electronics and new energy vehicles, lithium-ion battery (an energy storage and conversion device) technology has also made great progress. However, due to the continuous improvement of people's living standards, the requirements for lithium-ion batteries are also getting higher and higher, and the existing lithium battery technology can no longer meet the demand. For example, the highest energy density of a lithium battery system composed of traditional positive electrode materials (lithium cobaltate, lithium manganese oxide, and lithium iron phosphate) and negative electrode materials (graphite) is only 200Wh / kg, which is not enough for a large energy density. The use time and mile...

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