| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a graphite material capable of obtaining a high discharging capacity and a high initial charging and discharging efficiency as a negative electrode material for a lithium ion secondary cell and further capable of obtaining excellent rapid charging and discharging characteristic and cycle characteristic, further to provide a manufacturing method of the graphite material, the negative electrode material for the lithium ion secondary cell containing the graphite material, a negative electrode for the lithium ion secondary cell containing the negative electrode material and the lithium ion secondary cell using the negative electrode. <P>SOLUTION: In the manufacturing method of the graphite material, the graphite material having bump of ≥1 μm height on the surface, a graphite precursor and a metallic compound are mixed in a liquid phase, then the mixture is heated at ≥1,500°C to graphitize. The negative electrode material for the lithium ion secondary cell contains the graphite material. The negative electrode contains the negative electrode material. The lithium ion secondary cell uses the negative electrode. <P>COPYRIGHT: (C)2007,JPO&INPIT |
