| 摘要 |
PURPOSE: A manufacturing method of a cathode active material powder is provided to synthesize the cathode active material powder with high safety, high capacity, and high voltage and maximize the increase of Li impregnated into a crystalline structure. CONSTITUTION: A manufacturing method of cathode active material powder for lithium secondary batteries comprises the following steps: synthesizing Li2MnO3 by coprecipitation; and mixing the Li2MnO3 with LiMn1/3Co1/3Ni1/3O 2(NMC). A manufacturing method of electrode for lithium secondary batteries comprises the following steps: manufacturing slurry using a composite material in which NMC is mixed with the Li2MnO3 manufactured by coprecipitation; manufacturing anode by coating the current collector with the slurry; and manufacturing an electrode by setting a lithium metal as cathode and equipping with a separator and an electrolyte. [Reference numerals] (1) Titrate; (2) Adjust pH; (3) Dry; (S11) LiOH·H2O solution(pH 12); (S12) Mn(NO3)2·6H2O solution(pH 3); (S13) Mix; (S14) Precipitate Li-Mn(pH 11.5); (S15) Li2MnO3 precursor; (S16) Primarily sinter at 650°C for 12 hours; (S17) Secondarily sinter at 850°C for 24 hours |
