Lg Energy Solution, Ltd.

Lg Chem, Ltd

Il Geun Oh

Yong Ju Lee

Dong Hyuk Kim

Eun Kyung Kim

Rae Hwan Jo

Jung Hyun Choi

Su Min Lee

Je Young Kim

Wang Mo Jung

Sang Hoon Choy

Jung Woo Yoo

Se Mi Park

Sun Young Shin

Tae Gon Kim

Joo Yul Baek

Ye Lin Kim

Young Jae Kim

Min Kwak

Jun Muk Lim

Seung Youn Choi

Chang Ju Lee

Hyeon Min Song

So Ra Lee

Se Hui Sohn

Jee Eun Kim

Seo Young Kwon

Jae Young Lee

A positive electrode includes a current collector and a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer includes a positive electrode active material, carbon nanotube, and a binder, the binder includes polyvinylidene fluoride which has a weight average molecular weight of 720,000 g/mol to 980,000 g/mol, a BET specific surface area of the carbon nanotube is 140 m/g to 195 m/g, and the positive electrode satisfies the following Formula 1:1.3≤≤3.4  [Formula 1]

Positive electrode and secondary battery including the positive electrode

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 and a lithium secondary battery include the negative electrode, wherein the negative electrode includes a metal current collector and a negative electrode active material layer including a negative electrode active material and metal nanowires and formed on the metal current collector. The negative electrode active material includes a silicon-based active material and a carbon-based active material, and the metal nanowires include one or more metals selected from the group consisting of copper, gold, nickel, cobalt, and silver.

Negative electrode and lithium secondary battery including 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

According to an exemplary embodiment of the present disclosure, a negative electrode active material includes metal-silicon-carbon based particles including a MSiC matrix, wherein M in the MSiC matrix is one or more selected from the group consisting of Li, Mg, Na, Ca, and Al, 0.35≤a≤1, and 1≤b≤2. Since at the time of charging and discharging a battery, formation of an irreversible phase may be minimized by the MSiC matrix, initial efficiency of the battery may be improved, and electrical conductivity, physical strength, and chemical stability may be improved, such that capacity and lifecycle characteristics of the battery may be improved.

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 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

The present invention relates to: a negative electrode active material including silicon-based composite particles containing SiO(0<x<2) and a MgSiOphase, wherein the MgSiOphase includes a first MgSiOphase having an enstatite structure and a second MgSiOphase having a clinoenstatite structure at a weight ratio of 1:1 to 1:5; a negative electrode including the same; and a secondary battery including the negative electrode.

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

A composite negative electrode active material, which includes: a silicon-based core particle; an outer carbon coating layer positioned on a surface of the silicon-based core particle; first single-walled carbon nanotubes in contact with the outer carbon coating layer, wherein the first single-walled carbon nanotubes protrude from the outer carbon coating layer; a conductive structure spaced apart from the outer carbon coating layer, wherein the conductive structure includes at least one second single-walled carbon nanotubes; and a crosslinking material bonded to the first single-walled carbon nanotube and at least one of the second single-walled carbon nanotubes. The at least one of the second single-walled carbon nanotubes is crosslinked with the first single-walled carbon nanotube by the crosslinking material, and wherein the conductive structure and the first single-walled carbon nanotube are connected to each other.

Composite negative electrode active material, method of manufacturing the same, and negative electrode including the same

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 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

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Daejeon, South Korea

Il Geun Oh