Lg Energy Solution, Ltd.

Lg Chem, Ltd

University of California

University-industry Cooperation Group of Kyung Hee University

Wang Mo Jung

Chi Ho Jo

Sung Bin Park

Byung Chun Park

Sang Wook Lee

Dong Hun Lee

Ji Hye Kim

Hyuck Hur

Tae Gu Yoo

Ji Hoon Ryu

Jin Tae Hwang

So Ra Baek

Sang Min Park

Bo Ram Lee

Seong Hoon Kang

Sun Sik Shin

Jung Min Han

Gi Beom Han

Sungbin Park

Min Suk Kang

Hye Lim Jeon

Young Uk Park

Ju Kyung Shin

Hyung Man Cho

Dong Hwi Kim

Eun Sol Lho

Younguk Park

Dae Jin Lee

Hong Kyu Park

Sin Young Park

Ho Suk Shin

Seul Ki Kim

Min Kyu You

Jintae Hwang

Minsuk Kang

Joo Hong Jin

Tae Gon Kim

Hyelim Jeon

Eunsol Lho

Je Young Kim

Geungi Min

Jiyoung Park

Hak Yoon Kim

Sung Joong Kang

Wen Xiu Wang

Hyun Jin Oh

Woo Yeon Kong

Jungmin Han

Myung Ki Lee

Young Cheol Choi

Hyun Kuk Noh

Byungchun Park

Jin Hyung Lim

Sora Baek

Seul Ki Chae

Taegon Kim

Hyeong Il Kim

Boram Lee

Chul Haeng Lee

Yong Ju Lee

Seok Koo Kim

Dong Hyun Kim

Ji Young Park

Sang Beom Lee

Min Kwak

Sangwook Lee

Geun Gi Min

Eun Jo

Hyuk In Moon

Minchul Jang

Byoungkuk Son

Sung-Kyun Chang

Houng Sik Yoo

Sang Seung Oh

Ying Shirley Meng

Donghun Lee

Yo Han Kwon

Jung Woo Yoo

In Sung Uhm

Eunkyung Park

Il Geun Oh

InSung Uhm

Ki Won Sung

Woo Sik Kim

Won Seok Chang

Kwang Woo Yoon

Se Hui Sohn

Jinhyung Lim

Byung Joon Chae

Seung Won Park

Minghao Zhang

Daejin Lee

Seongmin Ha

Jin Young Hwang

Hye Seung Chung

In Seong Ju

Hae Jung Jung

Jong Wook Heo

Hyeseung Chung

Hakyoon Kim

A disclosure sacrificial positive electrode material with reduced gas generation and a method of preparing the same are disclosed herein. In some embodiments, a method includes calcining a mixture of lithium oxide (LiO) and cobalt oxide (CoO) in an atmosphere containing an inert gas and oxygen gas and having a relative humidity of 20% or less, wherein the oxygen gas is at a partial pressure of 1% or less, to prepare a lithium cobalt metal oxide represented by Chemical Formula (1):LiCoMOA  [Chemical Formula 1] M is at least one selected from the group consisting of Ti, Al, Zn, Zr, Mn and Ni, A is a halogen, x, y and z are 5≤x≤7, 0≤y≤0.4, and 0≤z≤0.001. A battery having the sacrificial positive electrode material can have reduced gas generation in the electrode assembly at the time of charging the battery, and thus the stability and life of the battery are improved.

Sacrificial positive electrode material with reduced gas generation and method of preparing thereof

A surface of a LiCoO-based positive electrode active material to have a rock salt crystal structure is provided. Specifically, a positive electrode active material for a lithium rechargeable battery is provided, including: a core particle containing lithium cobalt oxide doped with aluminum (Al); and a coating layer positioned on a surface of the core particle and containing a cobalt (Co)-based compound having a rock salt crystal structure. A method of producing the positive electrode active material is also provided using a solid-phase method. The positive electrode active material can be applied to a positive electrode, lithium rechargeable battery, battery module, battery pack, and the like.

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

The present disclosure relates to a method for preparing a positive electrode additive for a lithium secondary battery having a high irreversible capacity and being capable of preventing gelation and reducing gas generation, and a positive electrode additive prepared thereby. The method for preparing the positive electrode additive includes the steps of: mixing a lithium raw material, a nickel raw material and, optionally, a raw material containing an element M, and then heat-treating the mixture, thereby preparing a predetermined lithium nickel oxide, wherein the lithium raw material includes LiO and LiOH, and the LiOH is used in an amount of 5 to 10% by weight with respect to the total weight of the lithium raw material.

Method for preparing positive electrode additive for lithium secondary battery, and positive electrode additive for lithium secondary battery prepared thereby

A method for preparing a positive electrode active material and a positive electrode active material prepared thereby are provided. The method includes a first step of reacting a coating precursor preparation solution including a metal solution containing metal ions included in a coating layer and a chelating agent to prepare a coating precursor, which is a complex in which the metal ions and the chelating agent are combined, and a second step of dry-mixing particles having a specific composition and the coating precursor, followed by firing the mixture to form a coating layer having a specific composition on surfaces of the particles.

Positive electrode active material and method for preparing the same

The present invention relates to a positive electrode active material for a secondary battery which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide includes the nickel (Ni) in an amount of 65 mol % or more and the manganese (Mn) in an amount of 5 mol % or more based on a total amount of transition metals, and wherein the electrode positive active material is composed of a single particle, having a crystallite size of 180 nm or more.

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

A method of preparing a positive electrode active material includes preparing a lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, impregnating the lithium transition metal oxide with 300 ppm to 1,000 ppm of moisture based on 100 parts by weight of the lithium transition metal oxide, and performing a heat treatment on the lithium transition metal oxide impregnated with the moisture, wherein a lithium by-product present on a surface of the lithium transition metal oxide and the moisture react to form a passivation layer on the surface of the lithium transition metal oxide. A positive electrode active material prepared by the above-described preparation method, and a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.

Method of preparing positive electrode active material for lithium secondary battery and positive electrode active material prepared by the same

A positive electrode material and a method of producing thereof is provided. The positive electrode material having a bimodal particle diameter distribution and including large-diameter particles and small-diameter particles, wherein the small-diameter particle is a lithium composite transition metal oxide in the form of a single particle and containing a rock salt phase formed on a surface portion thereof.

Positive electrode material, producing method thereof, positive electrode and lithium secondary battery comprising the same

A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and an electrolyte, wherein the positive electrode includes a positive electrode active material layer having a positive electrode active material containing an overlithiated manganese-based oxide represented by Formula 1 below, and the negative electrode includes a negative electrode active material layer having a silicon-based negative electrode active material,LiNiCoMnMO  [Formula 1]

Lithium secondary battery

A positive electrode active material for a secondary battery which includes a nickel-based lithium composite transition metal oxide including nickel (Ni), wherein the lithium composite transition metal oxide satisfies Equation 1 and Equation 2 below80 nm≤crystallite size≤150 nm  [Equation 1]Δ size(|crystallite size−crystallite size|)≤20  [Equation 2]

Positive electrode active material for secondary battery and lithium secondary battery including the same

A positive electrode active material includes a nickel-based lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, wherein cobalt is included in an amount of greater than 0 ppm to 6,000 ppm or less on a surface of the nickel-based lithium transition metal oxide. A method of preparing the positive electrode active material, a positive electrode for a lithium secondary battery and a lithium secondary battery which includes the positive electrode active material are also provided.

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

A negative electrode includes a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive material. The negative electrode active material includes SiO(0≤x<2) particles and the conductive material includes secondary particles in which a portion of one graphene sheet is connected to a portion of an adjacent graphene sheet and a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are coupled to each other, wherein the oxygen content of the secondary particles is 1 wt % to 10 wt % based on the total weight of the secondary particles, the specific surface area of the secondary particles measured by a nitrogen adsorption BET method is 500 m/g to 1100 m/g, and the carbon nanotube structure is included in the negative electrode active material layer in an amount of an 0.01 wt % to 1.0 wt %.

Negative electrode and secondary battery including negative electrode

A positive electrode active material in the form of a single particle and a lithium secondary battery containing the positive electrode active material thereof are provided. The positive electrode active material has a nickel-based lithium composite metal oxide single particle. The single particle includes a metal doped in the crystal lattice thereof. The single particle includes, in the crystal lattice, a surface part having a rock salt structure, a spinel structure, or a mixed structure thereof from a surface of the single particle to a depth of 0.13% to 5.26% of a radius of the single particle, and a central part having a layered structure from an interface with the surface part thereof to the center part of the single particle.

Positive electrode active material for lithium secondary battery and preparation method thereof

The present disclosure relates to a positive electrode additive, a manufacturing method thereof, and a positive electrode and a lithium rechargeable battery including the same. Specifically, one embodiment of the present disclosure provides a positive electrode additive for a lithium rechargeable battery comprising: a compound represented by the following Chemical Formula 1; a compound represented by the following Chemical Formula 2; and lithium phosphate (LiPO):LiNiMO  [Chemical Formula 1]

Positive electrode additive, manufacturing method thereof, and positive electrode and lithium rechargeable battery including the same

The present invention relates to a silicon-carbon composite negative electrode active material, a negative electrode including the same, and a secondary battery, wherein the silicon-carbon composite negative electrode active material includes a core containing SiO(0≤X<2), a carbon layer covering at least a portion of the surface of the core, a carbon nanotube structure positioned on the carbon layer, and a polyvinylidene fluoride coating at least a portion of the carbon nanotube structure, wherein the carbon nanotube structure has a structure formed by arranging and bonding 2 to 5,000 single-walled carbon nanotube units side by side, and a portion of the carbon nanotube structure is bonded to the carbon layer.

Silicon-carbon composite negative electrode active material, negative electrode including silicon-carbon composite negative electrode active material, and secondary battery including negative electrode

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Daejeon, South Korea

Wang Mo Jung