NANO PARTICLE-GRAPHENE-CARBON COMPOSITES CONTAINING INTERNALLY DISPERSED GRAPHENE, METHOD FOR PREPARING THE COMPOSITE, AND APPLICATION THEREOF

摘要

The present invention relates to a nano particle-graphene-carbon composite having dispersed graphene therein and to the preparation thereof, wherein the present invention relates to an electrode using the nano particle-graphene-carbon composite having dispersed graphene therein, a secondary battery including the same and an electricity storage apparatus including the same. The nano particle-graphene-carbon composite according to the present invention has uniformly dispersed graphene, which has excellent conductivity and mechanical elasticity and a remarkably large specific surface area inside the composite, thereby absorbing changes in volume according to charging/discharging, and forming an electric conductivity network inside the composite, and thus exhibits the effect of allowing its utilization as a secondary battery electrode material having high capacity and remarkably extended cycle lifespan. In particular, according to the preparation method of the present invention, the effect of allowing easiness of mass-production is produced by a sol-gel method.