The LixMn2O4
powder for
cathode active material of a
lithium secondary battery of the present invention is prepared by a method of comprising the steps of mixing an acetate
aqueous solution using Li acetate and Mn acetate as
metal precursors, and a chelating agent
aqueous solution using PVB, GA, PAA or GC as a chelating agent; heating the
mixed solution at 70 DIFFERENCE 90 DEG C. to form a
sol; further heating the
sol at 70 DIFFERENCE 90 DEG C. to form a gel precursor; calcining the produced gel precursor at 200 DIFFERENCE 900 DEG C. for 5 DIFFERENCE 30 hours under
atmosphere. The
cathode active material, LixMn2O4
powder for a
lithium secondary battery in accordance with the present invention has a uniform
particle size distribution, a high
crystallinity and a pure
spinel-phase, and a particle size, a specific surface area, a lattice of a cubic structure and the like can be controlled upon the preparing conditions. The present invention also provides a method of preparing LiNi1-xCoxO2
powder, which comprises the steps of providing a gel precursor using PAA as a chelating agent and
hydroxide,
nitrate or acetate of Li, Co and Ni as
metal precursors; heating the gel precursor at 200 DIFFERENCE 900 DEG C. for 5 DIFFERENCE 30 hours to form a powder. The LixMn2O4 and LiNi1-xCoxO2 powder of the present invention can be used for a
cathode active material of a
lithium secondary battery such as a
lithium ion battery or
lithium polymer battery.