SINTERED LITHIUM COMPLEX OXIDE

A sintered lithium complex oxide characterized in that the sintered lithium complex oxide is constituted by sintering fine particles of a lithium complex oxide, the peak pore size giving the maximum differential pore volume is 0.80-5.00 µm, the total pore volume is 0.10-2.00 mL/g, the average particle size is not less than the above-specified peak pore size but not more than 20 µm, there is a sub-peak giving a differential pore volume not less than 10% of the maximum differential pore volume on the smaller pore size side with respect to the above-specified peak pore size, the pore size corresponding to the sub-peak is more than 0.50 µm but not more than 2.00 µm, the BET specific surface area of the sintered lithium complex oxide is 1.0-10.0 m 2 /g, and the half width of the maximum peak among X-ray diffraction peaks in an X-raydiffraction measurement is 0.12-0.30 deg.