Samsung Electronics Co., Ltd.

Samsung Sdi Co., Inc.

Woojin Bae

Sungsoo Han

Heechul Jung

Seongho Jeon

Kanghee Lee

Seunguk Kwon

Koichi Takei

Jeeeun Yang

Sangkook Mah

Dukhyoung Yoon

Guesung Kim

A binder including a metal salt of a graft copolymer, which is a polymerization product of polyvinyl alcohol, an ethylenically unsaturated carboxylic acid, and a polymerizable monomer having a long-chain alkyl group.

Binder, method of preparing the same, electrode for secondary battery including the binder, and secondary battery including the electrode

A binder includes a cross-linked product of at least a first polymer, a second polymer, and a third polymer, wherein the cross-linked product is cross-linked by at least two ester bonds; the first polymer includes polyimide, polyamic acid, a copolymer thereof, or a combination thereof, wherein the first polymer includes a structural unit including an alkali metal and a structural unit including at least one hydroxyl functional group; the second polymer includes poly(acrylic acid), poly(methacrylic acid), a copolymer thereof, or a combination thereof; and the third polymer includes polyvinyl alcohol, polyacrylamide, polymethacrylamide, a copolymer thereof, or a combination thereof.

Binder, electrode and lithium battery including the same, and method of preparing the binder

A negative active material including an active material core; and a polymer layer disposed on a surface of the active material core, wherein the polymer layer includes a third polymer including a cross-linked product of a first polymer and a second polymer, wherein the first polymer is at least one of polyamic acid, polyimide, or a combination thereof, and includes a first functional group; and the second polymer is water-soluble and includes a second functional group, and wherein the first polymer and the second polymer are cross-linked by an ester bond that is formed through at least one reaction starting from the first functional group and the second functional group, and at least one of the first polymer and the second polymer further includes a halogen group.

Negative active material, lithium secondary battery including the same, and method of manufacturing the negative active material

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 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

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Yongin-si, South Korea

Woojin Bae