Patent ID: 9196899
Filing Date: 2015-11-24
Classification: C01B,C01P,H01B,H01G,H01M,Y02E

Abstract:
1. An anode active material for use in a lithium secondary battery which comprises a mixture of two or more species of graphite, in which the mixture is, according to X-ray powder diffraction, not smaller than 0.3354 nm and not greater than 0.337 nm in d not smaller than 80 nm in Lc(004), not smaller than 100 nm in La(110), and not smaller than 0.5 degree in a half width of the peak of a plane (101) at a diffraction angle (2θ) of 44 degrees to 45 degrees, wherein one of the graphite species constituting the mixture of two or more species of graphite is graphite I in which the graphite I is, according to X-ray powder diffraction, not smaller than 0.3354 nm and not greater than 0.337 nm in d smaller than 100 nm in Lc(004), not smaller than 100 nm in La(110), and not smaller than 0.65 degree in a half width of the peak of a plane (101) at a diffraction angle (2θ) of 44 degrees to 45 degrees, and wherein one of the graphite species is graphite II in which the graphite II is, according to X-ray powder diffraction, not smaller than 0.3354 nm and not greater than 0.337 nm in d not smaller than 100 nm in Lc(004), not smaller than 100 nm in La(110), and not greater than 0.65 degree in a half width of the peak of a plane (101) at a diffraction angle (2θ) of 44 degrees to 45 degrees.