| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium secondary battery using a positive electrode material synthesized by a lithium compound and Co<SB>3</SB>O<SB>4</SB>, wherein discharging rate characteristics are not impaired, gas production under a high temperature environment is suppressed, and no malfunction is caused in a current blocking mechanism. <P>SOLUTION: Co<SB>3</SB>O<SB>4</SB>whereof the half-value width of its 311 face in X-ray diffraction by CuKα rays is 0.366 deg. or less is used, and its particle size distribution is preferably in the range of D(30%)=2.5-6.0 μm, D(50%)=4.0-7.5 μm, and D(90%)=13.0-16.0 μm. <P>COPYRIGHT: (C)2004,JPO |
