abstract |
The present invention provides a composite binder comprising a polyvinyl alcohol, polyvinylpyrrolidone, and conductive particles, wherein the conductive particles are uniformly distributed in the polymer resin, and a secondary battery including the same. By using the polymer and the conductive particles, which have very high adhesive strength and improved elongation, as the binder of the electrode mixture, they have excellent electrical conductivity and can maintain stable cycle characteristics between the active materials and the current collector. It is possible to reduce the volume change of the active materials. Based on this, in particular, a large capacity lithium secondary battery using a silicon or tin-based negative electrode active material and the like can be manufactured. |