Samsung Sdi Co., Inc.

Deok-Hyun Kim

Jae-Myung Kim

Kyu-Nam Joo

Young-Su Kim

So-Ra Lee

Beom-Kwon Kim

Gu-Hyun Chung

Jong-Hee Lee

Tae-Sik Kim

Yong-Mi Yu

Jinhee Lee

Inoh Cha

Yeon-Gap Kim

Soon-Sung Suh

Su-Kyung Lee

Ui-Song Do

Sang-Hyuck Ahn

Chang-Su Shin

Hyun-Ki Park

Narae Kim

Xianhui Meng

Young-Jin Choi

Jaewon Kim

Seok-Gyun Woo

Jong-Seo Choi

Jong-Ki Lee

Yong-Chan You

Sumihito Ishida

Hee-Young Chu

Young-Ugk Kim

Jaehou Nah

Sang-Eun Park

Pil Jin Yoo

Jong-ho Lee

Suk-Ki Kim

Youngugk Kim

Yu-Jeong Cho

Sunil Park

Hee Seon Choi

Yurim Cha

Min-Suk Lee

Ilyoung Choi

Hyun-Uk Jo

Doori Oh

Eunji Kang

Yookyung Kim

Hee-Joong Kim

Matulevich Yuri

Sang-Pil Kim

Sean Do

Hyejin Kim

Banseok Lee

A negative active material includes a core having a silicon-carbon composite and a polymer coating layer formed on the core, wherein the negative active material has about 1.02 to about 1.6 of a ratio of height of N1s peak occurring at about 400±about 0.5 eV relative to a height of N1s peak occurring at about 405±about 0.5 eV of a bonding energy, and about 1.02 to about 3.0 of a ratio of a height of C1s peak occurring at about 286.5±about 0.5 eV relative to a height of C1s peak occurring at about 290±about 0.5 eV when an X-ray photoelectron spectroscopy (XPS) is measured.

Negative active material and rechargeable lithium battery including same

A negative active material for a rechargeable lithium battery and a rechargeable lithium battery that includes the negative active material. The negative active material includes a first active material, which includes tertiary particles of natural graphite in which secondary particles are agglomerated. Primary particles are agglomerated and spheroidized in the secondary particles. Artificial graphite is positioned on a surface of the primary particles and a surface of the secondary particles. An amorphous carbon coating layer surrounds the tertiary particles of natural graphite. Further, the negative active material includes a second active material, which includes a carbon-based material having an aspect ratio of about 2 to about 100.

A negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cmto 30 mg/cm, a loading level of the first active material layer is 4 mg/cmto 25 mg/cm, a loading level of the second active material layer is 4 mg/cmto 25 mg/cm, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.

Negative electrode for lithium secondary battery and lithium secondary battery comprising same

The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same. The negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cmto 30 mg/cm, a loading level of the first active material layer is 4 mg/cmto 25 mg/cm, a loading level of the second active material layer is 4 mg/cmto 25 mg/cm, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.

Provided are an electrode for a rechargeable lithium battery including a current collector and an active material layer positioned on the current collector, the active material layer includes an electrode active material; binder; a composite material including an acrylonitrile-based resin and a carbon-based material positioned on the surface of the acrylonitrile-based resin; and a pore, and a rechargeable lithium battery including the same.

Electrode for rechargeable lithium battery and rechargeable lithium battery including the same

In an aspect, a negative active material for a rechargeable lithium battery including surface modified silicon oxide particles is disclosed.

Negative active material for rechargeable lithium battery, method preparing the same and rechargeable lithium battery including the same

Disclosed are a negative electrode for a rechargeable lithium battery that includes a plurality of non-sheet-shaped graphite particles, at least one silicon-based particle in a void formed by assembling the non-sheet-shaped graphite particles, and a sheet-shaped graphite powder between the non-sheet-shaped graphite particles, the void, or both thereof, wherein a size of the silicon particle is smaller than a length of the longest axis of the sheet-shaped graphite powder.

Negative electrode for rechargeable lithium battery, method of manufacturing same, and rechargeable lithium battery including same

Disclosed are a negative active material for a rechargeable lithium battery including a silicon-based material including SiOparticles, where 0&#x3c;x&#x3c;2, and a Si&#x2014;Fe&#x2014;containing alloy positioned on the surface of the SiO(0&#x3c;x&#x3c;2) particles, a method of preparing the same, and a negative electrode and a rechargeable lithium battery including the same.

Negative active material for rechargeable lithium battery, method of preparing same, and negative electrode and rechargeable lithium battery including same

An anode active material. The anode active material includes a core including SiO(0.5&#x2266;x&#x2266;1.7), and a coating layer formed on the core at least partially. The coating layer includes metal unreactive toward lithium.

Anode active material, anode and lithium battery containing the same, and preparation method thereof

A rechargeable lithium battery that includes a negative electrode including a silicon-based negative active material; a positive electrode including a positive active material being capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte, wherein the silicon-based negative active material includes a SiO(0&#x3c;x&#x3c;2) core including Si grains and a continuous or discontinuous coating layer including Ag, the coating layer being disposed on the core.

Rechargeable lithium battery including negative active material

Disclosed is a negative electrode for a rechargeable lithium battery that includes a current collector and a negative active material layer on the current collector, the negative active material layer having an active mass density in a range of about 1.6 g/cc to about 2.1 g/cc and including graphite and a pore-forming agent.

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

A secondary particle and a lithium battery including the same are provided wherein the secondary particle includes a plurality of primary particles and each primary particle contains n polycyclic nano-sheets disposed upon one another. The polycyclic nano-sheets include hexagonal rings of six carbon atoms linked to each other, wherein a first carbon and a second carbon have a distance therebetween of L. Lis a distance between a third carbon and a fourth carbon, and the arrangement of the polycyclic nano-sheets is such that L&#x2267;L. The secondary particle is used as a negative active material in the lithium battery, and the secondary particle contains pores, thereby allowing for effective intercalating and deintercalating of the lithium ions into the secondary particle to impart improved capacity and cycle lifespan.

Secondary particle and lithium battery including secondary particle

In an aspect, a negative electrode active material, a method of preparing the same, and a lithium secondary battery having the negative electrode including the negative electrode active material is provided. The negative electrode active material may include amorphous silicon oxide, crystalline silicon, carbon, metal silicide, spherical particles and whiskers.

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

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Yongin-si, South Korea

Deok-Hyun Kim