| 摘要 |
PURPOSE:To provide a carbonaceous particle suitable for a negative electrode for a lithium ion secondary battery with high electric capacity and high safety and provide a negative electrode for the lithium ion secondary battery with low overvoltage. CONSTITUTION:The surface of a meso-phase pitch green coke particle is covered with an oxygen-containing organic material, then heat treatment is conducted to obtain a carbonaceous particle having a mean particle size of 60mum or less, a layer spacing (d002) of 0.370-0.350nm, a crystallite thickness (Lc) in the direction of (c) axis of 0.8-10nm, and a true specific gravity of 1.7-2.1 suitable for a negative electrode for a lithium ion secondary battery. The carbonaceous particle is used as an active material of the negative electrode for the lithium ion secondary battery. |
