Sk on Co., Ltd.

Lg Chem, Ltd

Lg Energy Solution, Ltd.

Sk Innovation Co., Ltd.

Ju Ho Chung

Eun Kyung Kim

Gwi Ok Park

Sang Wook Woo

Jun Hyuk Song

Seok Keun Yoo

Dong Il Jang

Ye Ri Kim

Dong Sub Jung

Eun Jun Park

Yong Ju Lee

Oh Byong Chae

Sung Bin Park

Joon Sup Kim

Je Young Kim

Hong Kyu Park

Jik Soo Kim

Rae Hwan Jo

Soo Ji Hwang

Hee Won Choi

Jung Hyun Choi

Sang Baek Ryu

Hyun Chul Kim

Dong Gun Lee

Hyo Mi Kim

Da Bin Chung

Seung Youn Choi

Moon Sung Kim

Seung Hyun Yook

Jun Hee Han

Hwan Ho Jang

Min Kyung Seon

Lilin Piao

Gyu Ok Hwang

Chang Ju Lee

Da Hye Park

Suk In Noh

Jae Young Choi

Jun Soo Son

Ji Sang Jeong

Yeri Kim

Joon Hyung Moon

Do Ae Yu

Sang In Bang

Young Mo Yang

Provided are a binder composition for a secondary battery, a negative electrode including the same, and a secondary battery including the same. More particularly, the binder composition for a secondary battery having a three-dimensional structure, which is prepared by mixing a copolymer having specific repeating units and a polymer-type additive containing nitrogen (N) bonded to two or three carbons (C) in the repeating unit, has excellent mechanical properties and may effectively improve a binding force. The negative electrode and the secondary battery including the binder composition for a secondary battery effectively suppress expansion of a negative electrode to manufacture a secondary battery having excellent charge/discharge cycle characteristics and battery performance.

Binder composition for secondary battery, negative electrode for secondary battery including the same, and lithium secondary battery including the same

An anode active material for a lithium secondary battery includes a carbon-based particle including pores therein, a silicon-containing coating layer formed at an inside the pores of the carbon-based particle or on a surface of the carbon-based particle, and a carbon coating layer formed on the silicon-containing coating layer. A full width at half maximum (FWHM) of an O1s peak of a surface measured by an X-ray photoelectron spectroscopy (XPS) is 2.0 or more. A lithium secondary battery including the anode active material having improved initial discharge capacity and capacity efficiency is provided.

Anode active material for lithium secondary battery and lithium secondary battery including the same

Provided is a lithium secondary battery including a silicon-based anode active material for a lithium secondary battery and an anode formed using the same. The silicon-based anode active material for a lithium secondary battery according to exemplary embodiments includes a surface coated with carbon and doped with lithium. A ratio of a peak area at 102.5 eV to a total area of a peak area at 100 eV, the peak area at 102.5 eV, and a peak area at 104 eV, which appear in an Si2p spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 40% or less, thereby allowing an electrode to be stably manufactured without changing physical properties of the slurry during manufacturing the electrode. In addition, the anode active material for a secondary battery may be usefully used to manufacture a lithium secondary battery having high discharge capacity and high energy density characteristics.

Provided is a negative electrode active material for a secondary battery including a core-shell composite including: a core including a silicon oxide (SiO, 0<x≤2) and a metal silicate in at least a part of the silicon oxide; and a shell including a metal-substituted organic compound, wherein the metal of the metal silicate and the substituted metal of the organic compound are independent of each other, wherein each of the metal of the metal silicate and the substituted metal of the organic compound includes an alkali metal or an alkaline earth metal.

Negative electrode active material for secondary battery and method of manufacturing the same

An anode active material for a lithium secondary battery and a lithium secondary battery are provided. The anode active material includes a carbon-based particle including pores formed in at least one of an inside of the particle and a surface of the particle and having a pore size of the carbon-based particle is 20 nm or less, and silicon formed at an inside of the pores of the carbon-based particle or on the surface of the carbon-based particle. Silicon has an amorphous structure or a crystallite size of silicon measured by an XRD analysis is 7 nm or less. Difference between volume expansion ratios of carbon and silicon can be reduced to improve life-span property of the secondary battery.

Anode active material for lithium secondary battery, method of forming the same and lithium secondary battery including the same

According to embodiments of the present invention, there is provided an anode active material for a lithium secondary battery including a silicon oxide which includes a carbon coating layer on a surface thereof and is doped with magnesium. A ratio of peak area at 1303 eV to a sum of a peak area at 1304.5 eV and a peak area at 1303 eV, which appear in a Mg1s spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 60% or less.

Anode active material for lithium secondary battery, anode active material slurry and lithium secondary battery including the same

An anode active material for a lithium secondary battery and a lithium secondary battery are provided. The anode active material includes a carbon-based particle including pores formed in at least one of an inside of the particle and a surface of the particle and having a pore size of the carbon-based particle is 20 nm or less, and silicon formed at an inside of the pores of the carbon-based particle or on the surface of the carbon-based particle. A peak intensity ratio in a Raman spectrum of silicon defined as I(515)/I(480) is 1.2 or less. Difference between volume expansion ratios of carbon and silicon can be reduced to improve life-span property of the secondary battery.

A lithium secondary battery, wherein there is a pre-lithiated negative electrode such that a total irreversible capacity of a positive electrode is greater than a total irreversible capacity of the negative electrode while satisfying 150&#x3c; (negative electrode discharge capacity/lithium secondary battery discharge capacity)&#xd7;100&#x3c;300, and a relative potential of the negative electrode with respect to lithium metal in an operating voltage range of the lithium secondary battery is in a range of &#x2212;0.1 V to 0.7 V. Such a lithium secondary battery is capable of maintaining a capacity retention of 60% or more even after 500 cycles or more while achieving an energy density per volume of 800 Wh/L or more.

Long-life and ultra-high energy density lithium secondary battery

A negative electrode for a lithium secondary battery, in which a LiF layer comprising amorphous LiF in an amount of 30 mol % or more is formed on a negative electrode active material layer comprising a carbon-based active material, a lithium secondary battery comprising the same, and a preparation method thereof.

Negative electrode for lithium secondary battery, lithium secondary battery comprising the same, and preparation method thereof

A negative electrode active material including artificial graphite secondary particles comprising artificial graphite primary particles having an average particle diameter (D50) of 10 nm to 9 &#x3bc;m, said artificial graphite secondary particles being formed by granulating said artificial graphite primary particles, wherein a value (V) obtained by dividing a minimum particle diameter (D) of the secondary particles by the average particle diameter (D) of the initial particles is 0.50 to 0.8, and a value (V) obtained by dividing the minimum particle diameter (D) of the secondary particles by an average particle diameter (D) of the secondary particles is 0.23 to 0.4.

Negative electrode active material, and negative electrode and lithium secondary battery comprising same

A negative electrode active material which may dramatically improve stability of a battery while not degrading battery performance such as cycle characteristics, and a negative electrode and a lithium secondary battery which include the same, wherein the negative electrode active material includes negative electrode active material particles which include artificial graphite in the form of a secondary particle and a carbon layer formed on the surface of the artificial graphite, and a coating layer which is formed on the negative electrode active material particle and includes a compound represented by Formula 1.

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

Provided are a negative electrode active material for a lithium secondary battery and a method of preparing the same, wherein since the negative electrode active material includes porous polycrystalline silicon and the porous polycrystalline silicon includes pores disposed at grain boundaries, the negative electrode active material may exhibit a buffering action by internally absorbing changes in volume of the active material during charge and discharge. As a result, lifetime characteristics of a negative electrode and a battery may be improved.

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

The present invention relates to a method of manufacturing a negative electrode and a negative electrode manufactured using the method. According to the present invention, negative electrode samples are fabricated to have different electrode densities, and then, in a negative electrode expansion curve of each negative electrode sample according to the 1charging, when a change in slopes of tangents to the negative electrode expansion curve at an initial state of charge (SOC) of less than 50%, at which the expansion curve increases, satisfies a particular value, a secondary battery manufactured including a negative electrode having the electrode density may exhibit excellent lifespan characteristics and excellent initial efficiency for the corresponding active material.

Method of manufacturing negative electrode and negative electrode

The present disclosure provides a positive electrode material comprising: a positive electrode active material mixture comprising a positive electrode active material prepared with an active material precursor and a lithium compound, a conductive agent and a binder; and an active material precursor as an additive, in which the active material precursor as the additive is a same substance as the active material precursor as a material of the positive electrode active material.

Positive electrode material of secondary battery and preparation method thereof

Growing community of inventors

Daejeon, South Korea

Ju Ho Chung