Lg Chem, Ltd

Korea Electric Power Corporation

Cheol Hoon Choi

Dong Jo Ryu

Min Ah Kang

Seon Hee Han

Hye Soo Han

Je-Myung Oh

Mi-Hee Jung

Shin-Pyo Lee

Kyung An Kwon

Mi Hee Jung

Je Myung Oh

The present invention relates to a binder composition for a secondary battery, an electrode slurry composition including the same, and an electrode and a secondary battery manufactured by using the same, the binder composition including: a latex particle (A) which is a polymer of a monomer mixture including (a1) a conjugated diene monomer, (a2) an ethylenically unsaturated carboxylic acid monomer, and (a3) an aromatic vinyl monomer; and an emulsifier (B), wherein the (a2) ethylenically unsaturated carboxylic acid monomer is included in an amount of 3 parts by weight or more based on 100 parts by weight of the monomer mixture and the emulsifier (B) is included in an amount of less than 3000 ppm based on 100 parts by weight of the latex particles.

Binder composition for secondary battery, and electrode slurry composition, electrode and secondary battery including same

Disclosed is a binder composition for secondary batteries including composite latex comprising conjugated diene latex particles (A) and copolymer latex particles (B), each present in an independent phase, wherein the composite latex has a pH of 7 or less.

Binder composition for secondary batteries, and electrode and lithium secondary battery including the same

A cyanoethyl group-containing polymer and a preparation method thereof are provided. The cyanoethyl group-containing polymer is characterized by having very low contents of functional groups other than cyanoethyl groups.

Cyanoethyl group-containing polymer and preparation method thereof

The present invention relates to a binder composition for a secondary battery, including: a copolymer having a functional group; and an alkali metal ion bound to the functional group of the copolymer or with which a constituent element of the functional group is substituted. The binder composition exhibits enhanced adhesive strength and also exhibits low resistance due to the alkali metal ion included in the copolymer, and thus may exhibit more stable electrochemical performance.

Binder composition for secondary battery, and electrode for secondary battery and lithium secondary battery comprising the same

The present invention relates to an apparatus and method for measuring the convective heat transfer coefficients of nanofluids, which can realize a small-sized structure and can accurately control the movement velocity of a hot wire sensor within a fluid. The apparatus for measuring the convective heat transfer coefficients of nanofluids according to the present invention includes a sensor unit, a transfer unit and a liquid container. The transfer unit is formed on the sensor unit and is configured to allow the sensor unit to longitudinally reciprocate in a direction parallel to a ground surface with the sensor unit spaced apart from the ground surface. The liquid container is arranged below and spaced apart from the sensor unit, and is configured to allow a nanofluid or a base fluid, a convective heat transfer coefficient of which needs to be measured, to be put therein.

Apparatus and method for measuring convective heat transfer coefficients of nanofluids

Provided are a mixed nano-lubricating oil and a method for preparing the same. The method for preparing a mixed nano-lubricating oil includes the steps of: (a) preparing a mixed solution by adding and mixing a nanopowder and a dispersant to a solvent and pulverizing the nanopowder to a primary particle level; (b) modifying the surface of the nanopowder; (c) substituting the solvent of the mixed solution to a lubricating oil; and (d) mixing at least two nano-lubricating oils prepared using physically and chemically different nanopowders. According to the present invention, it is possible to improve the wear resistance and the load resistance at the same time by mixing at least two kinds of lubricating oils having excellent wear resistance or load resistance.

Preparation method of lubricating oil and lubricating oil produced thereby

Disclosed is a heat transfer evaluation apparatus of a nano-fluid including: a long pipe formed as a circular pipe; a rubber tube connected to one end of the long pipe to surround the outer surface of the long pipe; a short pipe communicated through the rubber tube; and a hot wire sensor formed of a metal hot wire at one end of the short pipe.

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Daejeon, South Korea

Cheol Hoon Choi