Samsung Electronics Co., Ltd.

Samsung Sdi Co., Inc.

Korea Advanced Institute of Science and Technology

Sungkyunkwan University

Ajou University Industry-academic Cooperation Foundation

Chonnam National University

Jinhwan Park

Byungjin Choi

Jayhyok Song

Byongyong Yu

Donghan Kim

Andrei Kapylou

Kwangmyung Cho

Ryounghee Kim

Yoonsok Kang

Hwayoung Cho

Taeyong Kim

Wooyong Lee

Sukgi Hong

Jaegu Yoon

Youngmin Lee

Junho Park

Insun Park

Changduk Kang

Kwangjin Park

Jinwoo Kim

Youngsoo Kim

Jinwoo Park

Sungho Park

Jaehyung Lee

Jieun Kim

Jinkyu Kang

Sungsoo Kim

Seunghyun Lee

Dongyoung Kim

Changsoo Lee

Kanghee Lee

Heechul Jung

Sungjin Kim

Sungjin Ahn

Donghee Yeon

Yukyung Jung

Joonsong Park

Dongwook Shin

Dongjin Ham

Dongsik Yang

Jaechan Park

Jinsu Ha

San Moon

Hongsoon Rhee

Hunsu Chu

Minsik Park

Jiyoon Song

Youhwan Son

Jiae Yun

Seunghoon Song

Kihong Kim

Changwoo Han

Junmo Park

Soonchun Chung

Juyoung Lee

Byoungsun Lee

Changhoon Jung

Anirban Bhaduri

Sichen Jin

Myunghoon Kim

Younggyoon Ryu

Tadi Venkata Siva Kumar

Kijun Jeong

Taewook Nam

Dhairya Sandhyana

Pyungcheon Lee

Heejin Hwang

Daechul Yoo

Donghoon Hur

SunJung Byun

Junyoung Mun

Jaekook Kim

Jihyeon Gim

An electronic apparatus includes a memory storing a speech recognition model and first recognition information corresponding to a first user voice obtained through the speech recognition model, the speech recognition model including a first network, a second network, and a third network; and a processor configured to: obtain a first vector by inputting voice data corresponding to a second user voice to the first network, obtain a second vector by inputting the first recognition information to the second network which generates a vector based on first weight information, and obtain second recognition information corresponding to the second user voice by inputting the first vector and the second vector to the third network which generates recognition information based on second weight information, wherein at least a part of the second weight information is the same as the first weight information.

Electronic apparatus for speech recognition, and controlling method thereof

This application relates to a cathode active material for a lithium secondary battery, a method of preparing the cathode active material, a cathode employing the cathode active material, and a lithium secondary battery employing the cathode. The cathode active material may include a secondary particle in which primary particles are aggregated and a first coating layer disposed on the plurality of primary particles to have a thickness of about 2.5 nm or less and including a NiO-like crystalline phase belonging to a Fm3-m space group. The cathode active material may prevent surface deterioration through a washing process using a weakly acidic or neutral organic buffer, thereby improving the initial efficiency characteristic and life characteristics of the lithium secondary battery while maintaining the initial capacity of the lithium secondary battery.

Cathode active material for lithium secondary battery, preparation method thereof, cathode including cathode active material, and lithium secondary battery including cathode

A composite cathode active material, a cathode and a lithium battery each including the composite cathode active material, and a method of manufacturing the composite cathode active material. The composite cathode active material includes a core including a plurality of primary particles, and a shell disposed on the core, wherein a primary particle of the plurality of primary particles includes a lithium nickel transition metal oxide, the shell includes a first composition and a second composition, wherein the first composition contains a first metal and the second composition contains a second metal, wherein the first metal includes a metal of Groups 2, 4, 5, and 7 to 15, the second metal includes a metal of Group 3, and the first composition includes a first phase and the second composition includes a second phase that is distinguishable from the first phase.

Composite cathode active material, cathode and lithium battery each containing composite cathode active material, and method of preparing composite 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 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 positive active material, including: a lithium transition metal composite oxide represented by Formula 1:LiNiM1M2M3O&#x2003;&#x2003;Formula 1

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

Provided is a recombinant microorganism having enhanced cellulose synthase gene stability, a method of producing cellulose by using the recombinant microorganism, and a method of preparing the recombinant microorganism.

Microorganism having enhanced cellulose synthase gene stability and method of producing cellulose by using the same

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 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

Provided are a recombinant microorganism including a genetic modification that increases a pyruvate, phosphate dikinase activity, a method of producing cellulose using the same, and a method of producing a microorganism having enhanced cellulose productivity.

Recombinant microorganism including genetic modification that increases pyruvate, phosphate dikinase activity and use thereof

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Seoul, South Korea

Jinhwan Park