Lg Energy Solution, Ltd.

Lg Chem, Ltd

Dongguk University Industry-academic Cooperation Foundation

Rae Hwan Jo

Yong Ju Lee

Eun Kyung Kim

Dong Hyuk Kim

Jung Hyun Choi

Su Min Lee

Se Mi Park

Je Young Kim

Il Geun Oh

Yoon Ah Kang

Hyun Chul Kim

Hong Kyu Park

Ji Hoon Ryu

Jung Woo Yoo

Ki Tae Kim

Ye Ri Kim

Dong Myung Kim

Ju Ho Chung

Su Jin Park

Mi Rim Lee

Seung Youn Choi

Sung Man Lee

Yong Mook Kang

Mi Ru Jo

Jun Sik Ham

The present invention relates to a negative electrode active material including a spherical carbon-based particle, and a carbon layer disposed on the spherical carbon-based particle and including a nano-particle, wherein the nano-particle has a silicon core, an oxide layer disposed on the silicon core and including SiO(0<x≤2), and a coating layer covering at least a portion of the surface of the oxide layer and including LiF.

Negative electrode active material, negative electrode including the same, and secondary battery including the negative electrode

A negative electrode active material including a core containing SiO(0≤x<2) and a lithium-containing compound, and a shell disposed on the core and containing SiO(0≤x<2) and magnesium silicate.

Negative electrode active material, preparation method thereof, negative electrode including the negative electrode active material, and secondary battery including the negative electrode

A negative electrode active material for a lithium secondary battery, the negative electrode active material including, based on 100 parts by weight of the total negative electrode active material, 5 parts by weight to 20 parts by weight of a first carbon-based particle, 55 parts by weight to 90 parts by weight of a second carbon-based particle, and 1 part by weight to 40 parts by weight of a silicon-based particle, wherein the specific surface area of the first carbon-based particle is 1.5 m/g to 4.5 m/g, the specific surface area of the second carbon-based particle is 0.4 m/g to 1.5 m/g, and the specific surface area of the first carbon-based particle is greater than the specific surface area of the second carbon-based particle, and capable of solving the problem of lifespan deterioration which may be caused by the use of a silicon-based particle as a negative electrode active material.

Negative electrode active material for lithium secondary battery and lithium secondary battery comprising the same

A negative electrode active material including silicon-based active material particles each including a core including SiO, wherein 0≤x≤2, and a coating layer present on the core. Also, a negative electrode active material in which the coating layer is any one of a carbon coating layer or a polymer coating layer, and the coating layer includes a fluorinated material including at least one of an alkali metal or an alkaline earth metal.

Negative electrode active material, negative electrode including negative electrode active material, and secondary battery including negative electrode

A negative electrode active material for a lithium secondary battery, which includes a silicon-based particle represented by M-SiO, wherein M is Li, Mg, Ca, Al, or Ti, and 0≤x<2, wherein the M-SiOincludes an amorphous phase at 20 wt % to 70 wt % based upon a total weight of the M-SiO, thereby exhibiting excellent initial efficiency and lifespan characteristics, and a preparation method thereof.

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

A negative electrode active material as well as a method of preparing a negative electrode active material which includes preparing a silicon-based compound including SiO, wherein 0.5<x<1.3; disposing a polymer layer including a polymer compound on the silicon-based compound; disposing a metal catalyst layer on the polymer layer; heat treating the silicon-based compound on which the polymer layer and the metal catalyst layer are disposed; and removing the metal catalyst layer, wherein the polymer compound includes any one selected from the group consisting of glucose, fructose, galactose, maltose, lactose, sucrose, a phenolic resin, a naphthalene resin, a polyvinyl alcohol resin, a urethane resin, polyimide, a furan resin, a cellulose resin, an epoxy resin, a polystyrene resin, a resorcinol-based resin, a phloroglucinol-based resin, a coal-derived pitch, a petroleum-derived pitch, a tar and a mixture of two or more thereof.

Negative electrode active material, negative electrode including the negative electrode active material, secondary battery including the negative electrode, and method of preparing the negative electrode active material

A silicon-carbon complex comprising carbon-based particles and silicon-based particles, wherein the silicon-based particles are dispersed and positioned on surfaces of the carbon-based particles, the carbon-based particles have a specific surface area of 0.4 m/g to 1.5 m/g, and the silicon-based particles are doped with one or more elements selected from the group consisting of Mg, Li, Ca, and Al, and a negative electrode active material for lithium secondary battery comprising the same.

Silicon-carbon complex and lithium secondary battery comprising the same

A negative electrode active material including a core containing SiO(0&#x2264;x&#x3c;2) and a lithium-containing compound, and a shell disposed on the core and containing SiO(0&#x2264;x&#x3c;2) and magnesium silicate.

The present invention relates to a method of preparing a negative electrode active material which includes forming a mixture by mixing LiO and SiO(0&#x3c;x&#x3c;2) particles including SiO, forming a reaction product by performing a heat treatment on the mixture at 400&#xb0; C. to 600&#xb0; C., and removing a portion of lithium silicate in the reaction product by washing the reaction product.

Method of preparing negative electrode active material

A negative electrode active material including a silicon-carbon-based particle, the silicon-carbon-based particle having a SiCmatrix and boron doped in the SiCmatrix, wherein x of the SiCmatrix is 0.3 or more and less than 0.6.

Negative electrode active material, negative electrode including the same, secondary battery including the negative electrode, and preparation method of the negative electrode active material

A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide&#x2014;the surface of which is complexed with the nickel precursor&#x2014;obtained in step (1).

Lithium metal oxide, negative electrode active material for lithium secondary battery comprising the same, and method of preparing the same

A negative electrode active material and a method for preparing a negative electrode active material, comprising preparing a silicon-based compound including SiO, wherein 0.5&#x3c;x&#x3c;1.3, and forming a crystalline carbon coating layer on the silicon-based compound through a chemical vapor deposition method using an organometallic compound as a source, wherein the organometallic compound is at least any one selected from the group consisting of aluminum acetylacetonate, aluminum ethoxide, aluminum phenoxide, aluminum acetate, aluminum tributoxide, and a combination thereof.

A negative electrode active material which includes a secondary particle including first primary particles, wherein the first primary particle includes a core including SiO, wherein 0&#x2264;x&#x3c;2, an intermediate layer which covers at least a portion of a surface of the core and includes silicon nitride, silicon oxynitride, or a mixture thereof, and a carbon coating layer which covers at least a portion of the intermediate layer and includes nitrogen-doped carbon, and a negative electrode and a lithium secondary battery which include the same.

Negative electrode active material, negative electrode comprising the negative electrode active material, and secondary battery comprising the negative electrode

The present invention relates to a silicon-based particle-polymer composite, which includes silicon-based particles; and a polymer coating layer formed on the silicon-based particles, in which the polymer coating layer includes metal-substituted poly(acrylic acid) in which hydrogen atoms in carboxyl groups of the poly(acrylic acid) chain are substituted with one or more selected from the group consisting of K, Na and Li.

Silicon-based particle-polymer composite and negative electrode active material comprising the same

A negative electrode active material including a core having SiO(0&#x2264;x&#x3c;2), an intermediate layer covering at least a portion of a surface of the core and including at least one of silicon nitride or silicon oxynitride, and a carbon coating layer covering at least a portion of the intermediate layer and containing nitrogen.

Negative electrode active material having an intermediate layer and carbon coating layer, negative electrode including the same, and secondary battery including the negative electrode

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Daejeon, South Korea

Rae Hwan Jo