Samsung Electronics Co., Ltd.

Samsung Sdi Co., Inc.

Postech Academy-industry Foundation

Donghee Yeon

Byungjin Choi

Jinhwan Park

Jayhyok Song

Sukgi Hong

Byongyong Yu

Sungjin Ahn

Jinsu Ha

Andrei Kapylou

Dongjin Ham

Donghan Kim

Jaegu Yoon

Junghwa Lee

Byoungwoo Kang

Youngsoo Kim

Junho Park

Pilsang Yun

Yoonsok Kang

Kwangjin Park

Suk-gi Hong

Sangil Han

Dongwook Shin

Youhwan Son

Myunghoon Kim

San Moon

Daechul Yoo

A composite cathode active material for an all-solid-state battery including a sulfide solid electrolyte, a preparation method thereof, a cathode layer for an all-solid-state battery, and an all-solid-state battery including the cathode layer, the composite cathode active material including a secondary particle including a plurality of primary particles; and a buffer layer on a surface of the secondary particle, wherein the secondary particle includes a nickel lithium transition metal oxide represented by Formula 1 (LiNiMO), the buffer layer includes a first buffer layer adjacent to a surface of the secondary particle and including an oxide represented by Formula 2 (LiAO); and a second buffer layer including an oxide represented by Formula 3 (LiEO).

Composite cathode active material for all-solid-state battery, preparation method thereof, cathode layer for all-solid-state battery, and all-solid-state battery including the cathode layer

A composite positive active material represented by Formula 1,LiNiCOMnMO  Formula 1wherein, in Formula 1, M is zirconium (Zr), aluminum (Al), rhenium (Re), vanadium (V), chromium (Cr), iron (Fe), gallium (Ga), silicon (Si), boron (B), ruthenium (Ru), titanium (Ti), niobium (Nb), molybdenum (Mo), magnesium (Mg), or platinum (Pt), 1.1≤a≤1.3, b+c+d+e≤1, 0≤b≤0.3, 0≤c≤0.3, 0<d≤0.6, and 0≤e≤0.1, wherein, through atomic interdiffusion of lithium and the metal, the composite positive active material has a uniform distribution of lithium excess regions and a uniform degree of disorder of metal cations, and the metal cations have a disordered, irregular arrangement at an atomic scale. Also a method of preparing the composite positive active material, a positive electrode including the composite positive active material, and a lithium battery including the positive electrode.

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

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 active material represented by Formula 1,LiNiCoMnMO&#x2003;&#x2003;Formula 1

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

An electrode active material includes: a core active material having a layered structure and capable of reversibly incorporating and deincorporating lithium; a dopant including boron and a first metal element, wherein the dopant is in the core active material; and a nanostructure disposed on a surface of the core active material and including a metal borate compound including a second metal element, wherein the second metal element is the same as the first metal element.

Electrode active material, lithium secondary battery containing the electrode active material, and method of preparing the electrode active material

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.

Cathode active material precursor, cathode active material formed therefrom, method of preparing the cathode active material, and cathode and lithium battery each including the 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 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, the positive electrode active material including: a first metal oxide having a layered structure; and a second metal oxide having a spinel structure, wherein second metal oxide is represented by Formula 1, and wherein the first metal oxide and the second metal oxide form a composite:LiMMnO&#x2003;&#x2003;Formula 1wherein, in Formula 1, &#x2212;1&#x3c;a&#x3c;1; and Mis at least one element selected from Groups 4 to 10, 13, and 14 of the Periodic Table, and wherein Mis not Mn. Also a positive electrode including the composite positive electrode active material, and a lithium battery including the positive electrode.

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

A cathode active material including a lithium transition metal oxide of Chemical Formula 1:LiMeMMnO&#x2003;&#x2003;Chemical Formula 1wherein 0&#x2266;x&#x2266;0.2, 0&#x2266;y&#x2266;0.2, 0&#x3c;x+y&#x2266;0.4, and 0&#x2266;&#x3b4;&#x3c;1, and Me and M are each independently one or more metals selected from magnesium (Mg), calcium (Ca), strontium (Sr), titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), tungsten (W), technetium (Tc), rhenium (Re), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), aluminum (Al), gallium (Ga), indium (In), silicon (Si), germanium (Ge), tin (Sn), and a rare earth element.

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Seoul, South Korea

Donghee Yeon