OLIVINE TYPE CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING THE SAME, AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME

• Main Authors: SHIN, JAE SEUNG, KONG, YOUNG SUN, CHOI, SHIN JUNG
• Format: Patent
• Language: English; Korean
• Published: 12.07.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to an olivine-type positive electrode active material for a lithium secondary battery, a method for preparing the same, and a lithium secondary battery comprising the same, which are capable of improving conductivity and capacity characteristics of lithium manganese phosphate (LMP). The olivine-type positive electrode active material for a lithium secondary battery is represented by chemical formula: Li_wMn_(1 - (x + y + z))M_xM′_yM″_zPO_4, wherein 0.95 < w <= 1.05, 0 < x <= 0.1, 0 < y <= 0.1, 0 < z <= 0.1, wherein 0 < x + y + z <= 0.2, and M, M′ and M″ are elements independently selected from the group consisting of Ni, Co, Fe, Mg, V, Zn, Cu, Al, and Ga. 본 발명은 하기의 식으로 표현될 수 있는 올리빈형 양극 활물질, 그것의 제조방법 및 그것을 포함하는 리튬이차전지에 관한 것이다: [화학식 1] LiMnMM'M"PO상기 식에서, 0.95 < w ≤ 1.05 0 < x ≤ 0.1 0 < y ≤ 0.1 0 < z ≤ 0.1 단, 0 < x + y + z ≤ 0.2 이며, M, M' 및 M"은 독립적으로 Ni, Co, Fe, Mg, V, Zn, Cu, Al 및 Ga으로 이루어진 그룹에서 선택되는 원소이다.