POSITIVE ELECTRODE ACTIVE MATERIAL COMPRISING LITHIUM-RICH LITHIUM MANGANESE-BASED OXIDE, AND LITHIUM TUNGSTEN COMPOUND, OR ADDITIONALLY, TUNGSTEN COMPOUND, ON LITHIUM-RICH LITHIUM MANGANESE-BASED OXIDE, AND LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE COMPRISING SAME

• Main Authors: HWANG, Jintae, HAN, Gi Beom, PARK, Sungbin, JUNG, Wang Mo
• Format: Patent
• Language: English; French; Korean
• Published: 04.04.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention provides a positive electrode active material and a production method therefor, the positive electrode active material comprising a lithium-rich lithium manganese-based oxide represented by chemical formula (1): Li1+aNixCoyMnzMvO2-bAb (1). Here, 0<a≤0.2, 0<x<0.4, 0<y<0.4, 0.5<z<0.9, 0<v<0.2, a+x+y+z+v=l and 0<b<0.5; M is one or more element selected from the group consisting of Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb, and Sn; and A is one or more element selected from the group consisting of P, N, F, S and Cl. The lithium manganese-based oxide comprises thereon a (i) lithium tungsten (W) compound, or the (i) lithium tungsten (W) compound and a (ii) tungsten (W) compound, wherein the (i) lithium tungsten (W) compound comprises the (ii) tungsten (W) compound and a lithium complex, and, on the basis of the total weight of the positive electrode active material, 0.1 wt% to 7 w% of the (i) lithium tungsten (W) compound, or the (i) lithium tungsten (W) compound and the (ii) tungsten (W) compound is included. La présente invention concerne un matériau actif d'électrode positive et son procédé de production, le matériau actif d'électrode positive comprenant un oxyde à base de lithium-manganèse riche en lithium représenté par la formule chimique (1) : Li1+aNixCoyMnzMvO2-bAb (1). Dans ladite formule,0<a≤0,2, 0<x<0,4, 0<y<0,4, 0,5<z<0,9, 0<v<0,2, a+x+y+z+v=l et 0<b<0,5; M représente un ou plusieurs éléments choisis dans le groupe constitué par Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb et Sn; et A représente un ou plusieurs éléments choisis dans le groupe constitué par P, N, F, S et Cl. Sur ledit oxyde à base de lithium-manganèse est présent un (i) composé lithium-tungstène (W), ou le (i) composé lithium-tungstène (W) et un (ii) composé tungstène (W), le (i) composé lithium-tungstène (W) comprenant le (ii) composé tungstène (W) et un complexe de lithium, et, par rapport au poids total du matériau actif d'électrode positive, une proportion située dans la plage allant de 0,1 % en poids à 7 % en poids du (i) composé lithium-tungstène (W), ou du (i) composé lithium-tungstène (W) et du (ii) composé tungstène (W) est incluse. 본 발명은 리튬 과잉의 리튬 망간계 산화물을 포함하는 양극 활물질로서, 상기 리튬 과잉의 리튬 망간계 산화물은 하기 화학식 (1)로 표시되고, Li1+aNixCoyMnzMvO2-bAb (1) 여기서, 0<a≤0.2, 0<x<0.4, 0<y<0.4, 0.5<z<0.9, 0<v<0.2, a+x+y+z+v=l, 0<b<0.5; M은 Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb, 및 Sn로 이루어진 군에서 선택되는 하나 또는 그 이상의 원소이며; A는 P, N, F, S 및 Cl로 이루어진 군에서 선택되는 하나 또는 그 이상의 원소이고; 상기 리륨 망간계 산화물 상에는 (i) 리륨 텅스텐 (W) 화합물, 또는 상기 (i) 리튬 텅스텐 (W) 화합물과, (ii) 텅스텐 (W) 화합물이 포함되며, 상기 (i) 리튬 텅스텐 (W) 화합물은 상기 (ii) 텅스텐 (W) 화합물과, 리튬의 복합체를 포함하며, 상기 (i) 리튬 텅스텐 (W) 화합물, 또는 상기 (i) 리튬 텅스텐 (W) 화합물 및 (ii) 텅스텐 (W) 화합물은 양극 활물질 전체 중량을 기준으로 0.1 중량% 내지 7 중량%로 포함되는 양극 활물질 및 이의 제조방법을 제공한다.