Samsung Sdi Co., Inc.

Inoh Cha

Jinhee Lee

Deok-Hyun Kim

Yongchan You

Youngugk Kim

Yeongap Kim

Hee Seon Choi

Changui Jeong

Jiyeon Kwak

Sangeun Park

Uisong Do

Yuntaek Oh

Chaewoong Cho

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.

The present invention relates to a negative active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery including the same. The negative electrode active material is a negative electrode material for a secondary battery, the negative electrode active material comprising a silicon-carbon composite comprising: a core comprising crystalline carbon and silicon particles; and an amorphous carbon-containing coating layer disposed on a surface of the core, wherein the negative electrode active material comprises: silicon oxide formed on a surface of the silicon particles; and an oxide of crystalline carbon, formed on a surface of the crystalline carbon, the average particle diameter (D50) of the silicon particles having a nanometer size, the proportion of O relative to Si in the silicon oxide is 30%-50%, and the proportion of O relative to C in the oxide of the crystalline carbon is 4%-10%.

Negative electrode active material for lithium secondary battery, preparation method therefor, and lithium secondary battery comprising same

A negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a conductive material including a linear-shaped carbon-based material having an average length of about 40 &#x3bc;m to about 250 &#x3bc;m and a dot-shaped carbon-based material, and a negative active material. A mixing ratio of the conductive material and the negative active material is a weight ratio of about 0.1:99.9 to about 2.0:98.0.

Negative electrode for rechargeable lithium battery, and rechargeable lithium battery including same

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Yongin-si, South Korea

Inoh Cha