Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

University of Texas System

Byongyong Yu

Jinhwan Park

Jayhyok Song

Byungjin Choi

Andrei Kapylou

Sungjin Ahn

Donghan Kim

Donghee Yeon

Sukgi Hong

Ryounghee Kim

Youngsoo Kim

Junho Park

Arumugam Manthiram

Kwangjin Park

Jaegu Yoon

Dongjin Ham

Dongwook Shin

Youhwan Son

Jinsu Ha

Younggyoon Ryu

San Moon

Youngjin Kim

A composite cathode active material includes: a core including a plurality of primary particles; and a shell on the core, wherein the primary particles include a first lithium transition metal oxide comprising nickel, the shell includes a first layer and a second layer on the first layer, the first layer includes a first composition containing a first metal, the second layer includes a second composition containing phosphorus, and the first metal includes at least one or more metal, other than nickel, belonging to any of Groups 2 to 5 and Groups 7 to 15 of the Periodic Table of the Elements. Also a cathode, and a lithium battery each including the composite cathode active material, and a method of preparing the composite cathode active material.

Composite cathode active material, cathode and lithium battery each containing composite cathode active material, and preparation method of cathode active material

A composite positive electrode active material includes: a first metal oxide that has a layered structure and is represented by Formula 1; and a second metal oxide that has a spinel structure and is represented by Formula 2, wherein the composite positive electrode active material includes a composite of the first metal oxide and the second metal oxide:LiMO&#x2003;&#x2003;Formula 1LiMeO&#x2003;&#x2003;Formula 2

Composite positive electrode active material, positive electrode including the same, and lithium battery including the positive electrode

A method of preparing a composite positive electrode active material for a lithium secondary battery includes surface-treating a nickel-based active material using carbon dioxide to form a lithium carbonate layer on the surface of the nickel-based active material, mixing the nickel-based active material having the lithium carbonate layer on the surface thereof with a metal precursor including at least one metal selected from cobalt (Co), aluminum (Al), magnesium (Mg), and gallium (Ga) to prepare a mixture, and heat-treating the mixture. A composite positive electrode active material for a lithium secondary battery may be obtained according to the method; and used in a positive electrode for a lithium secondary battery.

Composite positive electrode active material for lithium secondary battery, method of preparing the same, positive electrode for lithium secondary battery including the same, and lithium secondary battery including the positive electrode

A composite cathode active material includes a secondary particle; and a coating on a surface of the secondary particle, wherein the secondary particle comprises a plurality of primary particles, and the plurality of primary particles include a lithium nickel transition metal oxide having a layered crystal structure; and a grain boundary between primary particles of the plurality of primary particles, the grain boundary including a lithium metal oxide having a crystal structure different from the lithium nickel transition metal oxide having a layered crystal structure, wherein the coating on the surface of the secondary particle includes a metal oxide including cobalt, and a Group 2 element, a Group 12 element, a Group 13 element, or a combination thereof.

Composite cathode active material, cathode and lithium battery each including the same, and method of preparing composite cathode active material

A composite cathode active material including: a secondary particle including a plurality of primary particles including a lithium transition metal oxide having a layered crystal structure; and a coating layer disposed on a surface of the secondary particle and between the primary particles of the plurality of primary particles, wherein the coating layer includes a lithium cobalt composite oxide having a spinel crystal structure, and wherein the lithium cobalt composite oxide includes cobalt (Co) and a Group 2 element, a Group 12 element, a Group 13 element, or a combination thereof.

Composite cathode active material, method of preparing the same, and cathode and lithium battery including the composite cathode active material

A includes a cathode active material including a lithium transition metal oxide, wherein the lithium transition metal oxide includes nickel and a non-nickel transition metal, and an amount of the nickel in the lithium transition metal oxide is about 50 mole percent or greater with respect to a total number of moles of transition metals in the lithium transition metal oxide, a conducting agent including a linear carbonaceous conducting agent, and a binder, wherein the binder includes a first fluorinated binder not including a polar functional group, a second fluorinated binder including a polar functional group, a first non-fluorinated binder including a cyano group, and a second non-fluorinated binder including a cyanoalkyl group.

Cathode and lithium battery including cathode

A composite cathode active material includes a first cathode active material including a core including a first lithium transition metal oxide represented by Formula 1 and having a first layered crystalline phase that belongs to a R-3m space group; and a coating layer disposed on the core and including a second lithium transition metal oxide having a plurality of layered crystalline phases, wherein each layered crystalline phase of the plurality of layered crystalline phases has a different composition:LiMO&#x2003;&#x2003;Formula 1

Composite cathode active material, cathode and lithium battery containing the same, and method of preparing the composite cathode active material

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.

Positive active material including a shell including a metalcation, manufacturing method thereof, and positive electrode and lithium battery including the positive active material

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.

Positive active material, manufacturing method thereof, and positive electrode and lithium battery including the material

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:LiMO&#x2003;&#x2003;Formula 1

Composite cathode active material, cathode and lithium battery including the composite cathode active material, and method of preparing the composite cathode active material

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,LiNiMOM&#x2003;&#x2003;Formula 1wherein, in Formula 1, Mis at least one element selected from Group 4 to Group 14 of the Periodic Table of the Elements; Mis at least one element selected from F, S, Cl, and Br; 0.7&#x2264;x&#x3c;1; and 0&#x2264;e&#x3c;1. Also, a positive electrode including the composite positive active material, and a lithium battery including the positive electrode.

Composite positive active material, method of preparing the same, positive electrode including the composite positive active material, and lithium battery including the positive electrode

A positive active material includes an overlithiated lithium transition metal oxide including: a metal cation and a LiMOphase, 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 LiMOphase is less than or equal to about 20 mole percent, based on 1 mole of the overlithiated lithium transition metal oxide.

Positive active material, positive electrode, and lithium battery containing the positive active material

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.

Composite positive active material, positive electrode and lithium battery containing the composite positive active material

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.

Composite positive electrode active material, method of manufacturing the same, positive electrode including the composite positive electrode active material, and lithium secondary battery including the positive electrode

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Yongin-si, South Korea

Byongyong Yu