| 摘要 |
PURPOSE:To obtain excellent battery properties of high voltage and high discharging capacity and improve the stability at the time of short circuit by using a carbonacesous material, which is a graphitized carbon consisting of mesophase small spherical bodies produced during carbonation of pitch and doped with lithium, as an anode active mass. CONSTITUTION:After heating pitch, mesophase small spherical bodies are separated by pyridine or quinoline. Then, firing at about 1500-3000 deg.C is carried out to graphitize the mesophase small spherical bodies. The graphitized carbon has high lithium-absorbing function and the voltage at the time of desorption of lithium and overvoltage at the time intercalation and desorption is low and high density is obtained as a combination agent. Then, the graphitized carbon is prepared into a negative electrode composing agent using a binder to prepare a negative electrode and doped with lithium. |
