| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery, which has high capacity and low irreversible capacity and can perform high-speed charging/discharging and has a long charging discharging cycle service life. SOLUTION: This lithium secondary battery is composed of a negative electrode 22, composed mainly of a negative electrode active material to store/ release a lithium ion at charging/discharging time, a positive electrode 21 and a lithium ion conductive nonaqueous electrolyte or a polymer electrolyte, and the negative electrode active material is composed of particles which contain a phase of an inter-metallic compound containing 3B, 4B, 5B group elements of a periodic table and contains one or more phases of a phase, except for the inter-metallic compound composed of elements which are contained in the inter-metallic compound. |
