| 摘要 |
PURPOSE: A positive electrode active material for a lithium secondary battery is provided to minimize the side reaction of a positive electrode active material and electrolyte and to suppress the elution of manganese and degradation at charging and discharging. CONSTITUTION: A positive electrode active material for a lithium secondary battery includes a lithium metal composite oxide core represented by chemical formula 1, Li_wNi_xCo_yMn_(1-x-y-z)M_zO_2; and a coating layer containing fluorine compounds on the lithium metal composite oxide core. In chemical formula 1, 1.2<=w<=1.5, 0<x<1, 0y<1, 0.5<=1-x-y-z, and M is one or more metals selected from Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti, and Zr. [Reference numerals] (AA) Lithium-rich metal complex oxide; (BB) Metal salt; (CC) Fluorine compound; (DD) Coating step; (EE) Thermal treatment step; (FF) Providing positive electrode active materials surface-modified with a fluorine compound; |
| 申请人 |
KOREA ELECTRONICS TECHNOLOGY INSTITUTE |
发明人 |
SONG, JUN HO;KIM, YOUNG JUN;KIM, JEOM SOO;CHO, WOO SUK;KIM, JAE HUN;KIM, JIN HWA |
