Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Aekyung Chemical Co., Ltd.

Seunguk Kwon

Soonsung Suh

Dukhyoung Yoon

Hana Yoo

Jeeeun Yang

Sungsoo Han

Heeyoung Chu

Hyoungwoo Choi

Yury Matulevich

Jaehyuk Kim

Woojin Bae

Kyueun Shim

Sangkook Mah

Namseon Kim

Kwangshik Choi

Changui Jeong

Soo Jung Kim

Yohan Park

Jongseo Choi

Nam Seon Kim

Soojung Kim

Chungyoo Lee

Sunghwan Moon

A binder composition for a lithium secondary battery and a lithium secondary battery including the binder, the binder composition including a copolymer that includes a first structure unit including amide, a second structural unit including carboxylic acid or a salt thereof, and a third structural unit including a morpholine ring or a thiomorpholine ring.

Binder composition for lithium secondary battery and lithium secondary battery including the same

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 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 electrode for a lithium secondary battery includes: a negative active material disposed on a current collector; a negative active material layer including a first binder and a conductive agent; and a protective layer disposed on the negative active material layer, wherein the protective layer is in direct contact with the current collector and includes a nonaqueous or aqueous second binder and an inorganic material, wherein, in the protective layer including the aqueous second binder and the inorganic material, the amount of the inorganic material may be about 65 parts by weight or greater, based on 100 parts by weight of the protective layer, and wherein the protective layer including the nonaqueous second binder and the inorganic material, the amount of the inorganic material may be in a range of about 5 parts to about 25 parts by weight, based on 100 parts by weight of the protective layer.

Negative electrode for lithium secondary battery and lithium secondary battery including the same

A binder composition for a lithium secondary battery, an electrode, and a lithium secondary battery, the binder composition including an interpenetrating network structure that includes a cyclic polymer, the cyclic polymer including a repeating unit represented by Formula 1 or a repeating unit represented by Formula 2; and a copolymer, the copolymer including a repeating unit represented by Formula 3 and a repeating unit represented by Formula 4, wherein an amount of the repeating unit represented by Formula 3 is about 40 mol % to about 70 mol %, based on a total amount of the copolymer: 

Binder composition for lithium secondary battery, electrode for lithium secondary battery including the binder composition, and lithium secondary battery including the electrode

A water-soluble partially lithiated polyamic acid having an acid equivalent of less than 300 grams per equivalent and a degree of lithium ion substitution of from about 0.2 equivalents to about 1.0 equivalent with respect to carboxylic acid groups, which is a product of a polyamic acid and lithium hydroxide.

Water-soluble polyamic acid, method of preparing the same, binder composition for lithium battery including the same, and lithium battery manufactured using the binder composition

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

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Yongin-si, South Korea

Seunguk Kwon