NEGATIVE LECTURE ACTIVITIES FOR A LITHIUM-ION SECONDARY, NEGATIVE LECTURE FOR A LITHIUM-ION SECONDARY AND LITHIUM-ION SECONDARY

摘要

A negative electrode active material for a lithium ion secondary battery, the negative electrode active material includes silicon oxide particles, each of which has carbon on at least a portion of its surface, in which: a ratio (PSi/PSiO2) of an intensity of an X-ray diffraction peak at 2θ of from 27° to 29°, which is derived from Si, to an intensity of an X-ray diffraction peak at 2θ of from 20° to 25°, which is derived from SiO2, is within a range of from 1.0 to 2.6, when CuKa radiation having a wavelength of 0.15406 nm is used as a radiation source; and a specific surface area calculated from moisture adsorption at 298 K is 6.5 m2/g or less.