| 摘要 |
PURPOSE: To provide a carbon negative electrode material for a nonaqueous electrolyte secondary battery with high capacity and long cycle life by carbonizing an organic substance, crushing in a specified particle size, and baking at a specified temperature for graphitization. CONSTITUTION: An organic substance is calcinated for carbonization, and a carbonized material obtained is crushed so as to have an average particle size of 10μm-2mm, then baked at a temperature of 2000 deg.C or higher for graphitization to manufacture a carbon negative electrode material. The carbonized material is preferable to crush so as to have an average particle size of 15-40μm. The carbon negative electrode material with high true specific gravity, high electrode charging capability, and good cycle characteristics even when the upper limit voltage is made 4.2V can be obtained. |
