Lg Energy Solution, Ltd.

Lg Chem, Ltd

Ji Hee Yoon

Je Young Kim

Sang Hoon Choy

Jung Woo Yoo

Ki Tae Kim

Cheol Woo Kim

Taek Soo Lee

Young Joon Jo

Sung Soo Yoon

Je Gwon Lee

Young Seok Kim

Jun Soo Park

Woo Ha Kim

Joo Yong Park

Hye Jin Sim

Hyeon Jeong Kang

The present invention relates to electrode slurry coating apparatus and method, the present invention ultimately allowing the process efficiency to be increased and rate of errors to be reduced when double-layer structured active material layers are formed by temporally adjusting the height of first and second discharge outlets through which active material is discharged.

Electrode slurry coating apparatus and method for forming double active material layers

The present technology relates to an adhesion strength measurement system for a wet electrode specimen that can evaluate the adhesion strength of an electrode specimen impregnated with an electrolyte solution, and an adhesion strength measurement method for a wet electrode specimen using the same. The adhesion strength measurement system includes: a test substrate; an electrode specimen attached to the test substrate; a fixing jig configured to fix the test substrate so that the electrode specimen attached to the test substrate is immersed in an electrolyte solution; and an adhesion strength measurement unit configured to measure a force at which a mixture layer of the electrode specimen is peeled off by applying a tensile force to the gripped electrode specimen, the adhesion strength measurement unit including a grip part configured to grip one region of the electrode specimen.

Adhesion strength measurement system for wet electrode specimen and adhesion strength measurement method for wet electrode specimen using the same

A composition for coating a negative electrode active material, a negative electrode active material for a secondary battery, a negative electrode containing the same, and a lithium secondary battery containing the negative electrode. The composition for coating a negative electrode active material, includes tannic acid, a negative electrode active material for a secondary battery whose surface is coated with a tannic acid-based coating film, a negative electrode for a secondary battery, which includes the negative electrode active material, and a lithium secondary battery including the negative electrode may reduce volume expansion and prevent damage in charging/discharging of the negative electrode active material. Therefore, the secondary battery including the negative electrode ultimately improves resistance and life span characteristics.

Composition for coating a negative electrode active material, negative electrode active material and negative electrode for lithium secondary battery including the same

A binder composition for a secondary battery which includes a copolymer binder including at least one unit selected from (A) a unit derived from a vinyl-based monomer, (B) a unit derived from a conjugated diene-based monomer or a conjugated diene-based polymer, (C) a unit derived from a (meth)acrylic acid ester-based monomer, and (D) a unit derived from a water-soluble polymer, wherein the copolymer binder has a wet modulus of 0.02 MPa or more, and a negative electrode for a lithium secondary battery and a lithium secondary battery which include the same.

Binder composition for secondary battery, and electrode for secondary battery and lithium secondary battery which include the same

The present invention provides a negative electrode for a secondary battery, the negative electrode including a negative electrode current collector, a first negative electrode active material layer located on the negative electrode current collector, and a second negative electrode active material layer located on the first negative electrode active material layer, such that resistance in the electrode is decreased due to an increase in adhesion between the negative electrode current collector and the active material and cohesion between the active materials, thereby significantly improving capacity and lifespan characteristics of a battery, a method of fabricating the same, and a secondary battery including the same.

Negative electrode for secondary battery, method of fabricating the same and secondary battery including the same

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Daejeon, South Korea

Ji Hee Yoon