Negative electrode for lithium secondary battery and lithium secondary battery

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 m2/g, and an aspect ratio of at most 5, and an organic binder on a current collector,
• wherein a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of the layer of a mixture is at most 500.

A graphite powder that is used in a negative electrode for a lithium secondary battery, which has a layer of a mixture containing graphite powder and an organic binder, the layer of a mixture having a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of 500 or less, wherein the graphite powder is a secondary 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 500 Å or more, a specific surface area of 8 m2/g or less and an aspect ratio of 5 or less, and where a plurality of flat primary powders is aggregated or bonded so as to be non-parallel in orientation planes, wherein each of the flat primary powders has a size in a range of 1 to 100 μm and an aspect ratio of 100 or less.

A graphite powder that is used in a negative electrode for a lithium secondary battery, which has a layer of a mixture containing graphite powder and an organic binder, the layer of the mixture having a density in the range of 1.5 to 1.95 g/cm3, a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of 500 or less, wherein the graphite powder is a secondary 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 500 Å or more, a specific surface area of 8 m2/g or less and an aspect ratio of 5 or less, and where a plurality of flat primary powders is aggregated or bonded so as to be non-parallel in orientation planes, wherein each of the flat primary powders has a size in a range of 1 to 100 μm and an aspect ratio of 100 or less.