This document discusses graphene-based composites and their potential applications. It outlines that graphene can be combined with polymers, metals, ceramics, and other materials to form composites. Graphene composites exhibit useful properties like electrical conductivity, high thermal conductivity, and enhanced mechanical properties. The document provides examples of functional graphene composites for applications such as lithium-ion batteries, supercapacitors, solar cells, and fuel cells. Graphene-reinforced polymer composites could be used in industries like aerospace and automotive due to their light weight and high strength.