| 摘要 |
Disclosed is a mixed carbon material for use in an electrode of a non-aqueous secondary battery showing excellent characteristics having rapid charge-discharge characteristics and high cycle characteristics. More particularly, disclosed is a negative electrode material for non-aqueous electrolyte secondary battery comprising the following carbon material A and carbon material B: (carbon material A) a multilayer-structured carbon material which contains graphite particles and amorphous carbon covering the surfaces of the particles, and in which a 002 plane spacing (d002) measured by X-ray wide angle diffraction is 3.37 ? or less, Lc is 900 ? or more, a tap density is 0.8 g/cm3 or more, and a Raman R value, which is the ratio of a peak intensity at around 1360 cm-1 to a peak intensity at around 1580 cm-1 in an argon ion laser Raman spectrum, is 0.25 to 0.6; and (carbon material B) a carbon material in which a 002 plane spacing (d002) measured by X-ray wide angle diffraction is 3.37 ? or less, Lc is 900 ? or more, a tap density is 0.8 g/cm3 or more, and a Raman R value, which is the ratio of a peak intensity at around 1360 cm-1 to a peak intensity at around 1580 cm-1 in an argon ion laser Raman spectrum, is 0.11 to 0.2. |
