Lg Energy Solution, Ltd.

Kyung-Eun Sun

Seok-Koo Kim

Sun-Kyu Kim

Joon Kwon

Ji-Won Min

Ju-Ri Kim

Disclosed is a negative electrode including: a current collector; a negative electrode active material layer disposed on at least one surface of the current collector, including a silicon-based active material and a conductive material, and containing no binder polymer; and a coating layer disposed on the surface of the negative electrode active material layer and in at least a part of the inside of the pores of the negative electrode active material layer, and containing a coating layer polymer forming a chemical bond with silicon (Si) of the silicon-based active material, wherein the content of the coating layer polymer is 0.3-2 parts by weight based on 100 parts by weight of the negative electrode active material layer, and the coating layer polymer is a mixture of polyacrylic acid with polyvinyl alcohol.

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Daejeon, South Korea

Kyung-Eun Sun