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1. (WO2017171409) ANODE FOR SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, AND SECONDARY BATTERY COMPRISING SAME

Pub. No.:    WO/2017/171409    International Application No.:    PCT/KR2017/003444
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Thu Mar 30 01:59:59 CEST 2017
IPC: H01M 4/13
H01M 4/62
H01M 4/139
H01M 10/0525
Applicants: LG CHEM, LTD.
주식회사 엘지화학
Inventors: PARK, Jun Soo
박준수
YOON, Ji Hee
윤지희
KIM, Je Young
김제영
YOO, Jung Woo
유정우
Title: ANODE FOR SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, AND SECONDARY BATTERY COMPRISING SAME
Abstract:
The present invention provides: an anode for a secondary battery; a manufacturing method therefor; and a secondary battery comprising the same, the anode comprising: an anode collector; a first anode active material layer located on the anode collector; and a second anode active material layer located on the first anode active material layer, wherein the ratio of the thickness of the first anode active material layer to the total thickness of the first and second anode active material layers is less than 0.5, the first anode active material layer comprises a styrene-butadiene rubber in which the total amount of a repeating unit having a styrene-derived structure and a repeating unit having a butadiene-derived structure is 50 wt% or more, and the second anode active material layer comprises a (meth)acrylate-based polymer, which comprises a repeating unit having a styrene-derived structure and a repeating unit having a (meth)acrylate-derived structure, such that the amount of the repeating unit having a (meth)acrylate-derived structure is 60-90 wt%, and thus the resistance within an electrode is decreased because of an increase in the adhesive force between an electrode collector and active materials and in the adhesive force between the active materials, thereby enabling the capacity and lifespan characteristics of a battery to be greatly improved.