| 摘要 |
PROBLEM TO BE SOLVED: To produce a new lithium manganese complex oxide and to provide its production method, furthermore to provide a manganese type lithium secondary cell excellent in high-rate charge and discharge characteristics using the lithium manganese complex oxide as a cathode active material. SOLUTION: The lithium manganese complex oxide which has a spinel type crystal structure is denoted by the formula; Li1+XMn2-Y-ZMZO4+δ(M is one or more elements selected from Ni, Co, Fe, Cr, Cu, B, Al, Ga and In, 0<=X<=1/3, 0<=Y<=1/3, 9<Z<=0.25, -0.14<=δ<=0.5) and its average particle size is 5-20 μm, its BET specific surface area is below 1.0 m2.g-1 and the average crystalline diameter determined by Hall method is above 1,000 angstrom. The production method for the lithium manganese complex oxide and the lithium secondary cell using this lithium manganese complex oxide as a cathode are provided. |
