| abstract |
The present invention relates to a binder composition for a secondary battery comprising conjugated diene latex particles (A) having an average particle diameter of 50 nm to 200 nm existing as separate phases and Acrylic-based copolymer latex particles (B) having an average particle diameter of 300 nm to 700 nm, wherein the acrylic-based copolymer latex particles (B) are contained in an amount of 1 wt % to 30 wt % in terms of solid content. When the binder composition according to the present invention is applied to an electrode mixture and a lithium secondary battery, it is possible to maintain excellent adhesive strength between electrode materials and between electrode materials and current collectors, which are subjected to The volume changes, and a secondary battery having excellent initial capacity and efficiency can be provided. In addition, the possibility of thickness increase and gas generation at high temperature is reduced, thus reducing the expansion phenomenon, whereby a battery having enhanced stability can be provided. |