Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Dukhyoung Yoon

Seunguk Kwon

Jaehyuk Kim

Soonsung Suh

Hana Yoo

Heeyoung Chu

Sangkook Mah

Sungsoo Han

Hyeri Eom

Sora Lee

Woojin Bae

Jeeeun Yang

A binder includes a third polymer including a cross-linked product of a first polymer and a second polymer, wherein the first polymer includes a first functional group and is at least one selected from a polyamic acid and a polyimide, wherein the second polymer includes a second functional group and is water-soluble, and wherein the first polymer and the second polymer are cross-linked by an ester bond formed by a reaction of the first functional group and the second functional.

Binder, method of preparing the binder, and anode and lithium battery including the binder

A composite anode active material includes: a core comprising silicon; and a carbonaceous shell, wherein the carbonaceous shell includes a carbonaceous material and lithium titanium oxide.

Composite anode active material, anode including the same, and lithium secondary battery including the anode

A negative active material includes a silicon-based alloy, and the silicon-based alloy includes a Si single phase, a FeSialpha phase, and a FeSibeta phase, wherein an intensity ratio of a second diffraction peak of the FeSibeta phase to a first diffraction peak of the FeSialpha phase may be 0.1 or higher. A negative electrode includes the negative active material and a lithium battery includes the negative electrode. Lifespan characteristics of the lithium battery including the negative active material may improve.

Negative active material and negative electrode and lithium battery including the material

A negative active material for a lithium secondary battery and a lithium secondary battery including the same are provided. The negative active material may be a silicon (Si)-based alloy negative active material. In some embodiments, the Si-based alloy negative active material may include Si, iron (Fe), copper (Cu), and aluminum (Al), and may have a Si single phase and a first alloy phase, the first alloy phase being represented by a formula of AlCu, where x&#x3c;y. In some embodiments, the Si-based alloy negative active material may include Si, Fe, and Cu, and may include a Si single phase, a first alloy phase, and a second alloy phase, the first alloy phase being represented by a formula of CuSi, and the second alloy phase being represented by a formula of CuFe.

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

A negative active material includes a silicon-based alloy, wherein the silicon-based alloy includes silicon (Si); a first metal (M) selected from titanium (Ti), vanadium (V), chromium (Cr), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), gallium (Ga), and germanium (Ge), and at least one additional element (A), which is included in the silicon-based alloy and on a surface of silicon-based alloy, selected from carbon (C), boron (B), sodium (Na), nitrogen (N), phosphorous (P), sulfur (S), and chlorine (Cl), and the silicon-based alloy has an internal porosity of about 35% or less. A lithium battery including the negative active material may have improved lifespan characteristics.

Negative active material and lithium battery including negative active material

A negative electrode slurry composition includes a negative active material, a binder, and a dispersant. The dispersant includes a polyacrylic acid (PAA) having a weight average molecular weight (Mw) greater than 10 and less than 10,000. A negative electrode and a lithium battery include the negative electrode slurry composition.

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Yongin-si, South Korea

Dukhyoung Yoon