Lg Chem, Ltd

Lg Energy Solution, Ltd.

University of California

Chi Ho Jo

Wang Mo Jung

Hyuck Hur

Sung Bin Park

Ji Hoon Ryu

Bo Ram Lee

Min Kyu You

Gi Beom Han

Sungbin Park

Sun Sik Shin

Min Suk Kang

Jin Tae Hwang

Young Uk Park

Hong Kyu Park

Sang Seung Oh

Ying Shirley Meng

Younguk Park

Jiyoung Park

Seul Ki Kim

Hyun Kuk Noh

Sung Joong Kang

Byung Chun Park

Sin Young Park

Tae Gu Yoo

Ji Young Park

Young Cheol Choi

Hyuk In Moon

Dong Hun Lee

Ji Hye Kim

Su Min Lee

So Ra Baek

Jintae Hwang

Seong Hoon Kang

Gwang Yeon Kim

Sung Chul Lim

Jungmin Han

Minghao Zhang

Hye Seung Chung

Hye Hyeon Kim

Hae Jung Jung

Jong Wook Heo

Hyeseung Chung

Abhik Banerjee

Inseong Ju

Tae Gu You

Provided are a positive electrode including a positive electrode additive, a method of manufacturing the positive electrode, and a lithium secondary battery including the positive electrode. A coating temperature of a slurry is adjusted when the positive electrode is manufactured, and thus the deformation of the positive electrode additive due to temperature is minimized, and accordingly, structural deformation of the positive electrode additive included in the positive electrode is prevented.

Positive electrode including positive electrode additive, method of manufacturing positive electrode, and lithium secondary battery including positive electrode

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

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 provided a positive electrode active material for a lithium secondary battery including lithium cobalt oxide particles. The lithium cobalt oxide particles include lithium deficient lithium cobalt oxide having Li/Co molar ratio of less than 1, belongs to an Fd-3m space group, and having a cubic crystal structure, in surface of the particle and in a region corresponding to a distance from 0% to less than 100% from the surface of the particle relative to a distance (r) from the surface to the center of the particle. In the positive electrode active material for a lithium secondary battery according to the present invention, the intercalation and deintercalation of lithium at the surface of a particle may be easy, and the output property and rate characteristic may be improved when applied to a battery. Accordingly, good life property and the minimization of gas generation amount may be attained even with large sized positive electrode active material.

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

A positive electrode active material particle includes a core that contains lithium cobalt oxide represented by the following Chemical Formula LiCoMOAand a shell that is coated on the surface of the core and contains composite metal oxide of a metal with an oxidation number of +2 and a metal with an oxidation number of +3. In particular, M is at least one selected from the group consisting of Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb and Ni. A is oxygen-substitutional halogen and 1.00≤a≤1.05, 0≤x≤0.05, and 0≤y≤0.001.

Positive electrode active material particle including core containing lithium cobalt oxide and shell containing composite metal oxide and preparation method thereof

A method for preparing a lithium cobalt-based positive electrode active material and a positive electrode active material prepared by the method are provided. The method includes dry-mixing and then heat treating a lithium cobalt oxide particle represented by Formula 1 and one or more lithium metal oxide particle selected from the group consisting of lithium aluminum oxide, lithium zirconium oxide, and lithium titanium oxide.

Lithium cobalt-based positive electrode active material, preparation method thereof, positive electrode including same, and secondary battery including positive electrode

The present invention provides a positive active material for a rechargeable lithium battery, the active material including a dopant and having a crystalline structure in which metal oxide layers (MO layers) including metals and oxygen and reversible lithium layers are repeatedly stacked, wherein in a lattice configured by oxygen atoms of the MO layers adjacent to each other, the dopant time of charge, thereby forming a lithium trap and/or lithium dumbbell structure.

Positive electrode active material for lithium secondary battery, comprising lithium cobalt oxide for high voltage, and method for preparing same

A positive electrode active material for a secondary battery is provided. The positive electrode active material being a lithium cobalt-based oxide includes a doping element M. A lithium cobalt-based oxide particle containing the doping element M in an amount of 3,000 ppm or more, wherein in a bulk portion corresponding to 90% of a core side among the radius from a core of the particle to a surface thereof, the doping element M in the lithium cobalt-based oxide particle is contained at a constant concentration, and in a surface portion from the surface of the particle to 100 nm in a core direction, the doping element M is contained at a concentration equal to or higher than that in the bulk portion and has a concentration in which the concentration thereof is gradient gradually decreased in the core direction from the surface of the particle.

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

The present invention provides a positive electrode active material precursor for a secondary battery which includes primary particles of CoOor CoOOH, wherein the primary particle contains a doping element in an amount of 3,000 ppm or more, and has an average particle diameter (D) of 15 &#x3bc;m or more, and a positive electrode active material for a secondary battery which includes particles of a lithium cobalt-based oxide, wherein the primary particle contains a doping element in an amount of 2,500 ppm or more, and has an average particle diameter (D) of 15 &#x3bc;m or more.

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

A positive electrode active material contains a lithium-rich lithium manganese-based oxide, wherein the lithium manganese-based oxide has a composition of the following chemical formula (1), and wherein a lithium ion conductive glass-ceramic solid electrolyte layer containing at least one selected from the group consisting of thio-LISICON(thio-lithium super ionic conductor), LISICON(lithium super ionic conductor), LiS&#x2014;SiS&#x2014;LiSiO, and LiS&#x2014;SiS&#x2014;PS&#x2014;Lil is formed on the surface of the lithium manganese-based oxide particle:LiMMnOQ&#x2003;&#x2003;(1)

High voltage positive electrode active material including lithium manganese-based oxide and method for producing the same

A method of treating the surface of a positive electrode active material that is capable of inhibiting a reaction at the interface between a sulfide-based solid electrolyte and the positive electrode active material. A positive electrode active material particle for sulfide-based all-solid-state batteries, the surface of which is reformed, using the method and a sulfide-based all-solid-state battery, the charge/discharge characteristics of which are improved, including the same are also disclosed. The positive electrode active material particle for sulfide-based all-solid-state batteries manufactured using a dry-type method exhibits larger capacity than a positive electrode active material particle for sulfide-based all-solid-state batteries manufactured through a conventional wet-type process. In addition, the manufacturing process is simplified, and the amount of byproducts is reduced.

Positive electrode active material particle for sulfide-based all-solid-state batteries

Disclosed herein are a sulfide-based all-solid-state battery and a method of manufacturing the same, wherein the sulfide-based all-solid-state battery includes a positive electrode active material coated with a lithium niobate precursor, which is manufactured by a polyol process having low production cost, such that it improves safety and increases capacity of the sulfide-based all-solid-state battery.

Sulfide-based all-solid-state battery including positive electrode active material coated with lithium niobate precursor and method of manufacturing the same

Disclosed herein are a method of manufacturing a sulfide-based all-solid-state battery, and a sulfide-based all-solid-state battery manufactured thereby, wherein the battery includes a surface heat-treated positive electrode active material, which is simply performed by heating a positive electrode active material at 400&#xb0; C. to 600&#xb0; C. in an inert gas state, as a low-cost method of uniformly treating the surface of a positive electrode active material such that the positive electrode active material does not react with a sulfide-based solid electrolyte.

Sulfide-based all-solid-state battery including surface heat-treated positive electrode active material and method of manufacturing the same

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Daejeon, South Korea

Chi Ho Jo