L&f Co., Ltd.

Bong Jun Jeong

Sang Hoon Jeon

Su An Choi

Ji Sun An

Jun Ho Shin

Ji Woon Yang

Ho Jun Jeong

Su Youn Kwon

Chang Min Choi

Jeong A Gu

Mi Hye Yun

Yu Jin Sohn

A positive active material for a rechargeable lithium battery, a method for manufacturing the same, and a rechargeable lithium battery including the same are provided. A positive active material for a rechargeable lithium battery includes a compound that is capable of reversibly intercalating or deintercalating lithium, wherein the compound is formed of a core portion and a coating layer, the core portion is doped with M, and the coating layer includes Al and B, wherein M is Zr, Ti, Mg, Ca, Al, B, V, Zn, Mo, Ni, Co, Mn, or a combination thereof.

Positive active material for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same

In an embodiment of the present invention, a positive active material for a lithium secondary battery is represented by Formula 1, and includes a core including a compound having a core portion and a surface portion, and the compound has a lower L3/L2 intensity ratio of Ni in the surface portion than an L3/L2 intensity ratio of Ni in the core portion.Li[LiAD]EO&#x2003;&#x2003;[Formula 1] (In the above formula (1), A is NiCoMn, D is at least one element selected from the group consisting of Na, K, Mg, Ca, Sr, Ni, Co, Ti, Al, B, Si, Sn, Mn, Cr, Fe, V, Zr, Nb, and Mo, E is at least one element selected from the group consisting of P, F, and S, &#x2212;0.05&#x2264;z&#x2264;0.1, 0&#x2264;a&#x2264;0.05, 0&#x2264;b&#x2264;0.05, 0.3&#x2264;&#x3b1;&#x2264;0.9, 0.05&#x2264;&#x3b2;&#x2264;0.4, and 0.05&#x2264;&#x3b3;&#x2264;0.4.) (The L3/L2 intensity ratio of Ni is the oxidation number of Ni measured by electronic energy loss spectroscopy (EELS).).

Positive electrode active material for lithium secondary battery, method for preparing same and lithium secondary battery comprising same

There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing LiPOand further containing a lithium metal oxide, a metal oxide, and/or a combination thereof, the lithium metal oxide or the metal oxide containing Zr.

Cathode active material for lithium secondary battery, method of preparing the same, and lithium secondary battery containing the same

There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a core made of a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing LiPOand LiF, and further containing a lithium metal compound, a metal oxide, a metal fluoride compound, and/or a combination thereof, and the core is doped with fluorine.

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Daegu, South Korea

Bong Jun Jeong