| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery with a lowered irreversible capacity generated on a negative electrode surface and a manufacturing method for a carbonaceous negative electrode material for the secondary battery. SOLUTION: The negative electrode for the secondary battery is formed, by using a graphite in which a Gs value (Gs=Hsg/Hsd) for a surface intensified Raman spectroscopy is 10 or smaller, or the graphite in which at least two peaks is held on a differential TG curve, or the graphite in which a saturated tap intensity is 1.0 g/cc or larger, or the graphite in which a packing index is 0.42 or more, or the graphite in which a relative surface area ratio before and after the pressure is a pressure molding process is 2.5 or lower. The graphite is provided either through mixing a carbonaceous material with such a covering material as a pitch or the like, or through rendering a graphitization after a thermal treatment of the carbonaceous material in an oxygen atmosphere. |
