| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery using a lithium-transition metal compound oxide as a positive-electrode active material, and having small internal resistance and good charging/discharging cycle characteristics. SOLUTION: Two or more kinds of elements (including at least Ti) selected from among Li, Fe, Mn, Ni, Mg, Zn, B, Al, Co, Cr, Si, Ti, Sn, P, V, Sb, Nb, Ta, Mo, and W are substituted for part of a transition element, Co or Ni, contained in lithium cobaltate (LiCoO2) or lithium nickelic oxide (LiNiO2) used as a positive-electrode active material. M is a substitution element, M≠Co or Ni, and Z stands for a substitution quantity. |
