Abstract: A composite cathode active material, a cathode and a lithium battery that include the composite cathode active material, and a method of preparing the composite cathode active material. The composite cathode active material includes: a 1st core including a first lithium transition metal oxide; a 2nd core including a second lithium transition metal oxide; and a shell disposed along a surface of at least one of the 1st core and the 2nd core, wherein the shell includes: at least one first metal oxide represented by Formula MaOb (where 0<a?3, 0<b<4, and when a is 1, 2, or 3, b is not an integer); and a carbon-based material, the at least one first metal oxide is disposed in a matrix of the carbon-based material, M is at least one metal selected from Groups 2 to 13, 15, and 16 of the Periodic Table of Elements, and the first lithium transition metal oxide and the second lithium transition metal oxide have a different average particle diameter from each other.

Abstract: A composite anode active material, an anode including the composite anode active material, and a lithium battery including the anode are provided. The composite anode active material includes a core and a shell on and conformed to the surface of the core. The core includes a silicon-containing structure, a silicon-containing compound, or a combination thereof, and the shell includes at least one first metal oxide represented by MaOb (0<a?3, 0<b<4, and when a is 1, 2, or 3, b is not an integer) and a first carbonaceous material, where the first metal oxide is located inside a matrix of first carbonaceous material, and M includes at least one metal selected from among Group 2 to Group 13, Group 15, and Group 16 of the Periodic Table of Elements.

Abstract: A composite cathode active material, a cathode and a lithium battery that include the composite cathode active material, and a method of preparing the composite cathode active material are provided. The composite cathode active material includes: a core including a lithium transition metal oxide; and a shell arranged along a surface of the core, wherein the shell includes at least one first metal oxide represented by MaOb (where 0<a?3, 0<b<4, when a is 1, 2, or 3, b is not an integer); a first carbon-based material; and a second carbon-based material, where the at least one first metal oxide is arranged in a matrix of the first carbon-based material, M is at least one metal selected from among Groups 2 to 13, 15, and 16 of the Periodic Table of Elements, and the second carbon-based material includes fibrous carbon having an aspect ratio of greater than or equal to 10.

Abstract: A composite cathode active material, a cathode and a lithium battery including the composite cathode active material, and a preparation method of the composite cathode active material are provided. The composite cathode active material includes a first core including a first lithium transition metal oxide; a second core including a second lithium transition metal oxide; and a shell along a surface of at least one of the first core or the second core, wherein the shell includes a first metal oxide represented by Formula MaOb and a carbonaceous material, wherein the first metal oxide is within a carbonaceous metal matrix, the first lithium transition metal oxide and the second lithium transition metal oxide have a different particle size from each other, and the second lithium transition metal oxide includes a primary particle having a particle size of about 1 ?m or more.

Abstract: A composite cathode active material, a cathode including the same, a lithium battery, and a method of preparing a composite cathode active material are provided. The composite cathode active material includes: a core including a lithium transition metal oxide; and a shell disposed on and conforming to a surface of the core The shell includes: at least one first metal oxide represented by formula MaOb (0<a?3 and 0<b<4, and if a 1, 2, or 3, b is not an integer); a carbonaceous material; and a doped fluorine (F) element, and the first metal oxide is disposed in a carbonaceous material matrix, and M is at least one metal selected from among Group 2 to Group 13, Group 15, and Group 16 metals in the Periodic Table.

Abstract: Provided are a positive electrode, a lithium battery including the positive electrode, and a method of manufacturing the positive electrode. The positive electrode may include: a composite positive active material and a binder. The composite positive active material may include: a core including a lithium transition metal oxide; and a shell on and conformed to a surface of the core. The shell may include: at least one first metal oxide represented by Formula MaOb; and a carbonaceous material. The at least one first metal oxide may be in a carbonaceous material matrix, and M may be at least one metal selected from Groups 2 to 13 and 15 and 16. The positive active material layer may include a carbonaceous conductive agent, and the carbonaceous conductive agent may be present only in the shell.

Abstract: A composite cathode active material includes: a core including a lithium transition metal oxide; and a shell on and conforming to a surface of the core, wherein the shell includes at least one first metal oxide represented by Formula MaOb (wherein, 0<a?3, 0<b<4, and when a is 1, 2, or 3, b is not an integer), and a carbonaceous material, the first metal oxide is within a carbonaceous material matrix, M is at least one metal selected from groups 2 to 13, group 15, and group 16 of the periodic table of elements, the lithium transition metal oxide contains nickel, and the content of nickel is about 80 mol % or more based on total moles of transition metals in the lithium transition metal oxide.

Abstract: A composite cathode active material includes: a core including a lithium transition metal oxide; and a shell disposed on and conformal to a surface of the core, wherein the shell includes at least one first metal oxide represented by Formula MaOb (0<a?3, 0<b<4, when a is 1, 2, or 3, b is not an integer), and a carbonaceous material, the first metal oxide is disposed within a matrix of the carbonaceous material, and M is at least one metal selected from Groups 2 to 13, Group 15, and Group 16 of the Periodic Table of Elements. A cathode may include the composite cathode active material, and a lithium battery may include the cathode. Further provided is a method of preparing the composite cathode active material.

Abstract: A cathode active material includes a secondary particle including an aggregate of a plurality of primary particles, wherein the secondary particle includes a nickel-containing lithium transition metal oxide having a layered crystal structure, wherein the plurality of primary particles includes a first primary particle having a size greater than about 400 nanometers, a second primary particle having a size less than about 150 nanometers, and a third primary particle having a size of about 150 nanometers to about 400 nanometers, wherein the third primary particle has a area of greater than or equal to about 80% of a total area of the plurality of primary particles, and wherein the secondary particle has a porosity of less than or equal to about 10% of a total area of the cathode active material.

Abstract: In an aspect, a positive active material for a rechargeable lithium battery including overlithiated layered oxide (OLO), a method of preparing the same, and a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same is disclosed.

Abstract: A positive active material includes an over-lithiated lithium transition metal oxide having a core-shell structure, wherein a shell layer of the core-shell structure includes a metal cation.

Abstract: A positive active material including: a core including an overlithiated lithium transition metal oxide, and a coating layer which is disposed on at least a portion of a surface of the core, the coating layer including a polymer having an oxidation potential of about 4.4 volts to about 4.7 volts versus lithium metal. Also a manufacturing method thereof, and a positive electrode and a lithium battery including the positive active material.

Abstract: A composite cathode active material includes: a first metal oxide including a plurality of layered crystalline phases comprising a first layered crystalline phase and a second layered crystalline phase, wherein the first and second layered crystalline phases have a different compositions than each other, and a second metal oxide different from the first metal oxide and including a composite crystalline phase, that is different from the first metal oxide, wherein the second metal oxide is represented by Formula 1, wherein at least a portion of the second metal oxide is disposed on a first layered crystalline phase of the plurality of layered crystalline phases of the first metal oxide, and wherein the first layer crystalline phase is in a space group of R-3m: LixMyOz??Formula 1 wherein, in Formula 1, 0?x?3, 1?y?3, and 2?z?8, and M is at least one selected from a Group 4 element to a Group 13 element.

Abstract: A composite positive active material includes: a composite including a first metal oxide represented by Formula 1 and having a layered structure, and a second metal oxide having at least one crystal structure selected from a layer structure, a perovskite structure, a rock salt structure, and a spinel structure, wherein a content of the second metal oxide is greater than 0 and equal to or less than 0.2 moles, per mole of the composite, LiNixM11-xO2-eM2e??Formula 1 wherein, in Formula 1, M1 is at least one element selected from Group 4 to Group 14 of the Periodic Table of the Elements; Ma is at least one element selected from F, S, Cl, and Br; 0.7?x<1; and 0?e<1. Also, a positive electrode including the composite positive active material, and a lithium battery including the positive electrode.

Abstract: A positive active material includes an overlithiated lithium transition metal oxide including: a metal cation and a Li2MO3 phase, wherein M is at least one metal selected from a Period 4 transition metal having an average oxidation number of +4 and a Period 5 transition metal having an average oxidation number of +4, and wherein an amount of the Li2MO3 phase is less than or equal to about 20 mole percent, based on 1 mole of the overlithiated lithium transition metal oxide.

Abstract: A cathode active material includes a secondary particle including an aggregate of a plurality of primary particles, wherein the secondary particle includes a nickel-containing lithium transition metal oxide having a layered crystal structure, wherein the plurality of primary particles includes a first primary particle having a size greater than about 400 nanometers, a second primary particle having a size less than about 150 nanometers, and a third primary particle having a size of about 150 nanometers to about 400 nanometers, wherein the third primary particle has a area of greater than or equal to about 80% of a total area of the plurality of primary particles, and wherein the secondary particle has a porosity of less than or equal to about 10% of a total area of the cathode active material.

Abstract: A composite positive active material includes a composite, the composite including: a first metal oxide having a layered crystal structure; and a second metal oxide having a rocksalt crystal structure, wherein the composite includes at least one doping element selected from Group 1 and Group 2 of the Periodic Table wherein the doping element is not Li.

Abstract: A composite positive electrode active material including: an overlithiated layered oxide (OLO) including vanadium (V) and magnesium (Mg), wherein the vanadium and magnesium have a molar ratio of about 1:2. Also a method of manufacturing the composite positive electrode active material, a positive electrode including the composite positive electrode, and a lithium battery including the positive electrode.

Abstract: A positive active material, a method of preparing the same, and a lithium battery including the positive active material, the positive active material including a core, the core including an overlithiated lithium transition metal oxide; and a coating layer on the core, the coating layer including Li3VO4.

Abstract: Provided are a method of manufacturing a composite positive active material, a composite positive active material manufactured by the method, and a positive electrode and a lithium battery including the composite positive active material. The method may include acid-treating an overlithiated lithium transition metal oxide; and applying fluorine onto the acid-treated overlithiated lithium transition metal oxide using a fluorine compound.