Samsung Electronics Co., Ltd.

Youngsuk Jung

Boksoon Kwon

Sangmo Kim

Sungsoo Han

Yooseong Yang

Byung-hee Sohn

Heechul Jung

Eunha Lee

Seongho Jeon

Eunseog Cho

Hyoungwoo Choi

Seungrim Yang

Youngnam Kwon

Dongsu Ko

Sungnim Jo

A composite separator, a method of preparing the composite separator, and a secondary battery including the composite separator are provided. The composite separator includes a heat-resistant nonwoven fabric, and a porous coating film on at least one surface of the heat-resistant nonwoven fabric and including a multi-phase polymer including a stationary phase segment and a reversible phase segment, wherein an amount of the stationary phase segment is larger than an amount of the reversible phase segment.

Composite separator, method of preparing the same, and secondary battery including the same

An apparatus for measuring a deformation stiffness of an article includes a force measuring means configured to measure a force generated in a thickness direction of the article; a thickness measuring means configured to measure a thickness of the article; and a data processor configured to differentiate force with respect to thickness to calculate the deformation stiffness of the article, wherein each of the force and the thickness are a result of a volume change of the article.

Apparatus and method for measuring deformation stiffness of a secondary battery

Battery housing structures and battery apparatuses including the same are provided. A battery housing structure may include a case including an accommodation region in which a battery unit is accommodated, and an elastic member assembly provided in the case and configured to apply a pressure to the battery unit accommodated in the accommodation region. The elastic member assembly may include at least one first elastic member having an elastic coefficient that increases when a displacement increases and at least one second elastic member having an elastic coefficient that decreases when a displacement increases. The at least one first elastic member and the at least one second elastic member may have different structures or may be arranged in different directions.

Battery housing structure including plurality of elastic members, and battery apparatus including the same

Polyamic acid including structural units of the following Chemical Formulae 1 and 2 is provided: In Chemical Formulae 1 and 2, each substituent is as defined in the detailed description.

Polymer, composition and film

A polyimide precursor composition includes an oligomer or polymer having a substituted or unsubstituted carbonyl group only in a side chain and a diamine compound. A method of manufacturing a polyimide, and a polyimide film, are also disclosed.

Composition for crosslinkable polyimide precusor, method of manufacturing cross-linked polyimide, and polyimide film

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Suwon-si, South Korea

Youngsuk Jung