Polymer-silicon composite particles, method of making the same, and anode and lithium secondary battery including the same

摘要

The present invention relates to polymer-silicon composite particles using silicon having high energy density, a method of making the same, an anode and a lithium secondary battery including the same. The silicon having high energy density is used as an anode active material to provide a lithium secondary battery having large capacity. Silicon-polymer composite particles having a metal plated on the surface thereof are provided to solve the problem that silicon has low electrical conductivity and a method of preparing the same is provided to produce an electrode having improved electrical conductivity. Furthermore, silicon-polymer composite particles having a metal coated on the surface thereof through electroless plating are prepared and an electrode is formed using the silicon-polymer composite particles.

主权项

1. Polymer-silicon composite particles comprising silicon particles dispersed in a polymer matrix and a metal coating layer formed on the surface thereof;
wherein the polymer matrix corresponds to one or more materials selected from the group consisting of polypyrrole, polyaniline and polythiophene, wherein the thickness of the metal coating layer is in the range of 10 to 300 nm.