Lg Chem, Ltd

Lg Energy Solution, Ltd.

Korea Research Institute of Chemical Technology

Hyung-Suk Cho

Sang-Hoon Choy

Jin-Young Son

Jong-Heon Seol

Hwi-Soo Yang

Je-Young Kim

Taek-Soo Lee

Jung-Min Yang

Eun-Kyoung Kim

Chan-Soo Jun

Yoon-Jung Choi

Yo-Jin Kim

Jung-Keun Yoo

Young-Pil Kim

Sin-Young Jung

Sung-Joon Park

Ga-Hyun Lim

A method that allows prediction of phase stability of an electrode slurry through a simple method of determining a change in viscosity of the electrode slurry. Therefore, only the electrode slurry having high phase stability is selected before electrode slurry is introduced to a process for manufacturing an electrode. Then, the selected electrode slurry is introduced to the process to provide an improved effect of process efficiency.

Method for predicting processability of electrode slurry and selecting electrode binder

A method for evaluating phase stability of an electrode mixture slurry, including the steps of: (S1) introducing the electrode mixture slurry to a rheometer; (S2) applying a first shear rate to the electrode mixture slurry; (S3) applying a second shear rate after applying the first shear rate to the electrode mixture slurry, wherein the second shear rate is higher than the first shear rate; (S4) applying a third shear rate after applying the second shear rate to the electrode mixture slurry, wherein the third shear rate is lower than the second shear rate; and (S5) comparing the shear viscosity at the first shear rate with the shear viscosity at the third shear rate. An apparatus for evaluating phase stability of the electrode mixture slurry is also provided.

Method and apparatus for evaluating phase stability of electrode mixture slurry

Disclosed is a system for manufacturing an electrode for a secondary battery, which includes an active material drying unit configured to dry an active material coated on an electrode current collector, and a tester unit configured to measure a dried state of the active material by performing a scratch test to the dried active material.

System for manufacturing electrode for secondary battery having scratch tester

Disclosed is a positive electrode for a lithium secondary battery which uses a positive electrode active material containing secondary particles with a relatively weak particle strength to improve the adhesion between a positive electrode mixture layer and a current collector, and the positive electrode includes a positive electrode current collector; a primer coating layer including a first polymer binder and a first conductive material, having surface roughness (R) of 85 nm to 300 nm and formed on at least one surface of the positive electrode current collector; and a positive electrode mixture layer formed on an upper surface of the primer coating layer and including a positive electrode active material containing secondary particles with a compressive breaking strength of 1 to 15 MPa, a second polymer binder and a second conductive material.

Positive electrode for lithium secondary battery and method for preparing the same

The present invention relates to alkoxysilane-substituted diene copolymers, organic and inorganic hybrid complex compositions comprising the same and a process for the preparation of the same. The alkoxysilane-substituted diene copolymers are prepared by reacting a diene copolymer substituted by epoxy or hydroxy groups with a silane compound. Thus prepared alkoxysilane-substituted diene copolymer is characterized by the facts that it is in organic solvents and it is capable of being cured at low temperatures. The present invention also relates to a composition prepared by mixing the said copolymer with inorganic fillers and/or coupling agents. The copolymer of the formula (1) has high reactivity with coupling agents since it possesses reactive silane groups and thus provides the diene polymer composition as having improved compatibility with inorganic fillers. In addition, when the copolymer of the formula (1) is added to a sol-gel reactant, a substitution reaction proceeds smoothly even under mild reaction conditions and thus it is possible to introduce the third functional group to copolymer blocks.

Diene copolymer substituted by alkoxy silane, and organic and inorganic hybrid composition comprising the same

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Daejeon, South Korea

Hyung-Suk Cho