Lg Chem, Ltd

Lg Energy Solution, Ltd.

Ulsan National Institute of Science and Technology

Research Affairs of Snu & Snu R&db Foundation

Korea Advanced Institute of Science and Technology

Ls Mtron Ltd.

Unist-Academy Industry Research Corporation

Toray Battery Separator Film Co., Ltd.

Unist, Inc.

Je Young Kim

Yong Ju Lee

Jung Woo Yoo

In Sung Uhm

Yoon Ah Kang

Hoe Jin Hah

Hee Won Choi

Kyoung Ho Kim

Eun Kyung Kim

Sung-Kyun Chang

Seok Koo Kim

Eun Ju Lee

Sei Woon Oh

Oh Byong Chae

Seul Ki Kim

Wang Mo Jung

Chul Haeng Lee

Yo-Han Kwon

Sang Wook Woo

Rae Hwan Jo

Sang Hoon Choy

Jae Hyun Lee

Yong Tae Lee

Sun Young Shin

Soon Ho Ahn

Su Min Lee

Sang Young Lee

Ki Tae Kim

Jun Hyuk Song

Ki Hwan Kim

Hong-Kyu Park

Sung Kyun Chang

Ye Ri Kim

Sinyoung Park

Ji Eun Lee

Hye-Ran Jung

Mi Rim Lee

Hye Ran Jung

Li Lin Piao

Il Hong Kim

Yo Han Kwon

Ji Yoon Kwon

Pil Kyu Park

Jung Keun Yoo

Ye Lin Kim

Seung Youn Choi

Seung-Tae Hong

Dong Sub Jung

Kwang Ho Jeong

Jae Phil Cho

JungMin Han

Jung In Lee

Soonho Ahn

Tae Gon Kim

Joo Yul Baek

WonSeok Chang

Jun Muk Lim

Byung Chun Park

Ji Heon Ryu

Taek Soo Lee

Jung Hyun Choi

Jin Hyong Lim

Byung Hun Oh

Hyun Chul Kim

Young Jae Kim

Il Geun Oh

Ki Won Sung

Ju Ho Chung

Cheol Hee Park

Han Nah Jeong

Seok-Koo Kim

Hyun Wook Kim

InSung Uhm

Hyung Suk Cho

Kyung Hwa Woo

Hong Kyu Park

Sun Sik Shin

Sang Wook Lee

Sang-Young Lee

Min Hee Lee

Sang Kyun Lee

Won Jong Kwon

Sung Hoon Yu

Geun Chang Chung

Hyun Min Kim

Seung Tae Hong

Hang Ah Park

Young Sun Choi

Sun Kyu Kim

Jae Woong Kim

Se Mi Park

Jun Soo Park

Heon-Cheol Shin

Sang Yun Jung

Dong Kyu Kim

SungJin Kim

Joo Sung Lee

In Chul Kim

Hyung-Man Cho

Min Kwak

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

Provided is a negative electrode active material which includes: a silicon-based core; and an outer coating layer formed on the silicon-based core and including polyimide, wherein the polyimide comprises a fluorine-containing imide unit. The outer coating layer may be included in an amount of more than 0 wt % and 4.5 wt % or less in the negative electrode active material.

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

A negative electrode active material for a lithium secondary battery which includes first negative electrode active material particles including artificial graphite particles and a carbon coating layer formed on the artificial graphite particle; and second negative electrode active material particles including natural graphite particles, wherein the first negative electrode active material particles have a larger average particle diameter (D) than an average particle diameter (D) of the second negative electrode active material particles, and a weight ratio of the first negative electrode active material particles and the second negative electrode active material particles is in a range of 70:30 to 95:5.

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

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

A negative electrode active material for a secondary battery including: natural graphite particles; and a carbon coating layer on a surface and in an inside of the natural graphite particles. The negative electrode active material for a secondary battery has a porosity of 3% to 13%.

Negative electrode active material for secondary battery, method of producing the same, and negative electrode for secondary battery and lithium secondary battery including the same

The present invention provides a negative electrode for a lithium secondary battery, which includes a negative electrode current collector; and a negative electrode active material layer which is formed on the negative electrode current collector and includes a negative electrode active material including a silicon-based material, wherein the negative electrode active material includes lithium intercalated by pre-lithiation, and the extent of pre-lithiation of the negative electrode active material, calculated by a specific equation, is 5 to 50%.

Negative electrode for lithium secondary battery, method of preparing the same, and lithium secondary battery including negative electrode for lithium secondary battery

A negative electrode including a negative electrode active material layer including a negative electrode active material, wherein the negative electrode active material includes a core and a coating layer disposed on the core. The core includes natural graphite and an amorphous carbon layer on the natural graphite, wherein the natural graphite has an average particle diameter, D, of 10 μm to 14 μm.ONH The negative electrode active material includes 1,500 ppm wt % to 2,000 ppm wt % of oxygen, 200 ppm wt % to 300 ppm wt % of nitrogen, and 200 ppm wt % to 300 ppm wt % of hydrogen as measured by an ONH analysis, and the coating layer includes carbon nanofibers.

Negative electrode and secondary battery including the negative electrode

A method of recovering a used battery and apparatus for recovering the capacity of a secondary battery comprising: (1) preparing a secondary battery with deteriorated lifespan characteristics; (2) heating the secondary battery with deteriorated lifespan characteristics while pressing the secondary battery with deteriorated lifespan characteristics to compress a positive electrode, negative electrode, or separator included in the secondary battery; and (3) charging/discharging the secondary battery with deteriorated lifespan characteristics, the secondary battery having been pressed and heated, and the secondary battery with deteriorated lifespan characteristics may be charged and discharged while being pressed and heated, thereby exhibiting an effect of recovering the capacity of the secondary battery with deteriorated lifespan characteristics.

Method of recovering capacity of a used battery and a secondary battery capacity recovery apparatus

A negative electrode active material that includes an active material core that allows for the intercalation and deintercalation of lithium ions. The negative electrode active material also includes a plurality of conductive materials positioned on a surface of the active material core, a plurality of organic linkers each including a hydrophobic group and a polar functional group bonded to the hydrophobic group, and an elastic unit. The elastic unit includes an elastic moiety having two or more binding sites, and a functional group bonded to a binding site of the elastic moiety. The functional group reacts with the polar functional group of the organic linker, and one or more of the plurality of organic linkers are connected to the conductive materials through the hydrophobic groups of the organic linkers.

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

A negative electrode for a lithium secondary battery, a method of producing the negative electrode, a method of producing a pre-lithiated negative electrode by pre-lithiation of the negative electrode, and a lithium secondary battery including the negative electrode. The negative electrode can increase the capacity of a battery and improve the electrochemical performance by securing the initial reversibility of a negative electrode by pre-lithiation, and allow lithium ions to be diffused into a negative electrode active material layer during pre-lithiation without being lost.

Negative electrode including first negative electrode active material layer and second negative electrode active material layer having polymer coating layer on a surface of the second negative electrode active material and lithium, method of producing the same and lithium secondary battery including the same

A negative electrode for a secondary battery including: a negative electrode current collector; and a negative electrode active material layer present on the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material, wherein the negative electrode active material for a secondary battery includes natural graphite, and has a sphericity of 0.58 to 1, a tap density of 1.08 g/cc to 1.32 g/cc, and D−Dof 16 μm to 19 μm, wherein D−Dis a difference between a maximum particle diameter Dand a minimum particle diameter Din a particle size distribution.

Method of producing negative electrode active material for secondary battery, negative electrode for secondary battery, and lithium secondary battery including the same

A lithium secondary battery including: a negative electrode; a positive electrode; a separator disposed between the negative electrode and the positive electrode; and an electrolyte, wherein the negative electrode includes SiOx (where 0<x<2) and a carbon-based negative electrode active material, the positive electrode includes a positive electrode active material including a lithium-rich manganese-based oxide in which a manganese content in the total metal except lithium is greater than 50 mol %, and a ratio (Li/Me) of the number of moles of lithium to a total number of moles of metals except lithium is greater than 1, and the depth of using SiOx defined by the disclosed Equation (1) in a state of SOC 0% is 1 to 15, preferably 3 to 15.

A negative electrode and a secondary battery including the negative electrode. The negative electrode including a current collector and a negative electrode active material layer, wherein the negative electrode active material layer includes negative electrode active material particles, the negative electrode active material particles include natural graphite particles and a carbon coating layer disposed on the natural graphite particles. The negative electrode active material particles have a Dof 6 μm to 9.2 μm and a half-width of 5.0 μm to 5.5 μm based on a particle size distribution, and the specific surface area of the negative electrode active material particles is from 0.6 m/g to 2.2 m/g.

The present invention relates to a three-dimensional structure electrode, a method for manufacturing same, and an electrochemical element including the electrode. The present invention is characterized by comprising: (a) an upper conductive layer and a lower conductive layer which have a structure constituting an assembly within which a conductive material and a porous nonwoven fabric including a plurality of polymeric fibers are three-dimensionally connected in an irregular and continuous manner, thereby forming a mutually connected porous structure; and (b) an active material layer forming the same assembly structure as the conductive layers and forming a three-dimensionally filled structure in which electrode active material particles are uniformly filled inside the mutually connected porous structure formed in the assembly structure, wherein the active material layer is formed between the upper conductive layer and the lower conductive layer.

Three-dimensional structure electrode and electrochemical element including same

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Daejeon, South Korea

Je Young Kim