Patent ID: 9077029
Filing Date: 2015-07-07
Classification: H01M,Y02E

Abstract:
1. A negative active material for a rechargeable lithium battery, comprising: a flake powder that comprises a plurality of flakes deposited on a negative electrode of a rechargeable lithium battery, each flake including a plurality of silicon atoms and a plurality of oxygen atoms, an oxygen atom amount ranging from about 5 wt % to about 36 wt % based on a total amount of silicon atoms and oxygen atoms, the flakes each having a long plate shape and being aligned substantially in parallel in relation to each other, the flakes each having a thickness ranging from about 30 nm to about 500 nm, the thickness of a flake being two times the shortest radius passing through a geometric center of the flake, the flakes having an average aspect ratio ranging from about 10 to about 100, the aspect ratio being the ratio of the longest flake radius passing through the geometric center of the flake to the shortest flake radius passing through the geometric center of the flake.