ORGANIC POLYMER-SILICON COMPOSITE PARTICLE, PREPARATION METHOD FOR SAME, AND CATHODE AND LITHIUM SECONDARY BATTERY INCLUDING SAME

摘要

The present invention relates to organic polymer-silicon composite particles using a silicon having high energy density, a preparation method for same, and a cathode and a lithium secondary battery including same, and provides: a lithium secondary battery having a high capacity by using a high energy density silicon as a cathode-active substrate material; and an electrode having an improved electrical conductivity, by providing a preparation method for a silicon-polymer complex particle having a surface plated with a predetermined amount of metal, as a solution to the conventional problem of relatively low electrical conductivity. Also, the present invention enables the preparation of a silicon-polymer composite particles having particle surfaces coated with a predetermined amount of metal using an electroless coating method, and electrodes are formed thereby, which solves the conventional problems of deterioration from the significant change in volume of the silicon active material, and low electrical conductivity when using silicon particles as an electrode active material.