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

摘要

A negative active material for rechargeable lithium batteries and a method of manufacturing the negative active material are provided. The negative active material for rechargeable lithium batteries includes at least one generally spherical assembly having flake-shaped materials that are capable of doping and dedoping lithium, and are arranged in a generally spherical shape defining a central pore. The negative active material imparts improved cycle-life characteristics.

主权项

1. A negative active material for a rechargeable lithium battery, comprising:
at least one generally spherical particle comprising a plurality of flake-shaped materials that are capable of doping and dedoping lithium, wherein the flake-shaped materials are arranged in a generally tangential configuration about a generally spherical central pore, wherein the central pore of the generally spherical particle is inside the generally spherical particle and has an average diameter ranging from 0.1 μm to 5 μm, and the flake-shaped materials comprise a Si-based material, a Sn-based material, an Al-based material, a Ge-based material, an alloy thereof, or a combination thereof.