Lithium Manganese Oxide Fine Powder, Manufacturing Method and Lithium-ion Secondary Battery Adopting Positive Electrode Using It as Active Material

摘要

The present invention discloses a lithium manganese oxide Li _x Mn ₂ O ₄ (x is 1-1.05) fine powder in which the powder particles have an octahedral form, a manufacturing method thereof, and a lithium ion secondary battery employing a positive electrode having the same as an active material. . Lithium manganese oxide of the present invention comprises the steps of dissolving lithium acetate and manganese acetate in a solvent; Adding gelatin to the solution obtained in the step and removing the solvent to form a gel; Calcining the gel at 300 to 500 ° C. to form lithium manganese oxide powder; Pulverizing the powder and then sintering at 750 to 850 ° C. for 6 to 12 hours; And by cooling the sintered product is made of fine powder in the form of powder particles octahedron, the lithium ion secondary battery employing a positive electrode as the active material has excellent capacity characteristics and high rate charge and discharge characteristics.