| 摘要 |
PROBLEM TO BE SOLVED: To provide high-capacity and good charge/discharge characteristics and a satisfactory cycle life in the charge/discharge at a high current density by using a complex made of silicon storing and discharging lithium ions and a metal, applying conductivity to silicon as a negative electrode active material. SOLUTION: A complex made of silicon and a conductive metal applying conductivity is used as a negative electrode active material of this battery, a metal oxide containing a transition metal for the constituting element is used as a positive electrode active material, and a nonaqueous electrolyte dissolved with a lithium compound in an organic solvent is used as an electrolyte. The silicon powder to be used may be of crystalline or amorphous from, and preferably silicon power with an average grain size of about 1-10 μm is used. Copper is desirably used for the conductive metal. The complex preferably contains the conductive metal of about 3-90 wt.%, preferably containing 5-50 wt.%. the complex is preferably manufactured through electroless plating or vacuum deposition. |
