Negative active material for rechargeable lithium battery, method for preparing same, and rechargeable lithium battery including same

摘要

Disclosed are a negative active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The negative active material includes a composite particle including a silicon particle and a carbon coating layer coated on the surface of the silicon particle and a porous space formed by the entangled carbon nanofibers, the composite particle contacting the external surface of the carbon nanofibers in the porous space of the carbon nanofiber structure, and the carbon nanofibers have a larger diameter than that of the composite particle and a diameter ranging from about 100 nm to about 2000 nm.

主权项

1. A negative active material for a rechargeable lithium battery, comprising:
a composite particle comprising a silicon particle and a carbon coating layer coated on the surface of the silicon particle; and a carbon nanofiber structure comprising a porous space formed by entangled carbon nanofibers, wherein the composite particle contacts the external surface of the carbon nanofibers in the porous space of the carbon nanofiber structure, andthe carbon nanofiber has a diameter ranging from about 100 nm to about 2000 nm and a larger diameter than that of the composite particle.