Patent ID: 7906240
Filing Date: 2011-03-15
Classification: C01B,H01M,Y02E

Abstract:
1. A negative electrode for a lithium secondary battery comprising: a layer of a mixture containing graphite powder that has an average particle diameter in a range of 1 to 100 μm, a crystallite size Lc (002) in a C-axis direction of a crystal of at least 500 Å, a specific surface area of at most 8 m wherein a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of the layer of the mixture is at most 500, and wherein the graphite powder is a secondary power where a plurality of flat primary powders is aggregated or bonded so as to be non-parallel in orientation planes and individual flat primary powders have a size in a range of 1 to 100 μm and an aspect ratio of 100 or less.