| 摘要 |
PURPOSE: To provide negative electrode material for a secondary battery, especially for a lithium secondary battery having high charging/discharging capacity and efficiency. CONSTITUTION: Electrode material for a secondary battery is graphite having a particle size of 1-100μm and a purity of 90% of more, obtained by milling flake natural graphite with a jet mill. When the graphite is charged/discharged at a voltage of 0.02-0.5V, charging/discharging capacity obtained on and after a second cycle is 250mAh/g or more. |
