| 摘要 |
PROBLEM TO BE SOLVED: To enlarge a discharge capacity and to improve cycle characteristics and heat stability by adding an alkali to a mixed aqueous solution of constituent metal compounds except Li to give a coprecipitate, cleaning and drying the coprecipitate and adding a lithium compound to the coprecipitate. SOLUTION: An alkali is added to a mixed aqueous solution of constituent metal compounds except Li, which is neutralized and coprecipitated to give a coprecipitate. The coprecipitate is cleaned, dried, mixed with a lithium compound selected from LiOH, LI2 O and Li2 CO3 in a dry state, baked in an oxygen- containing gas flow at 700-850 deg.C for 10-24 hours to give a lithium-containing compound metal oxide which has α-NaFeO2 type crystal structure, 0.520 to 0.700 deg. separation Δ2θ [(110)-(018)] between a peak position of (018) face and (110) face in a X-ray diffraction using CuKα line and is shown by the formula; LiNix Coy Alz O2 (0.70<=x<0.85; 0.05<=y<=0.20; 0.10<=z<=0.25; x+y+z=1.0). |
