Our group has a unique ability to span the entire spectrum of novel nanocomposite development starting from synthesizing custom carbon and metal nanomaterials, to mixing with polymer to create novel nanocomposites, and then post-processing to make parts, which can be tested for a variety of properties. Polymer nanocomposites have unique multifunctional properties resulting from the size and shape of the fillers and display superior electrical, thermal and mechanical properties to conventional polymer composites due to the nanoscale size of the filler. Multiwall carbon nanotubes (MWCNT) with and without doping, graphene-like materials like Graphene nanoribbons (GNR), MnO2 and ZnO nano wires, Copper and Silver nanowires (CuNW and AgNW) were synthesized and thenmelt-mixed with polymers via solution mixing and in miniature mixers. The electrical, electromagnetic interference (EMI) shielding and mechanical properties of the resulting nano composites were tested. The electrical, mechanical and rheological properties of these new materials were studied and evaluated for industrial applications such as personal electronics enclosures, shielding for aerospace, batteries and anti-static packaging. The morphology of the polymer blend nanocomposites was characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) and revealed unique network structures. Hybrid filler and polymer blend systems indicate that there is an optimum morphology and nanofiller ratio for best electrical properties. Hybrid nanocomposites displayed extremely low electrical percolation thresholds lower than 0.0005 volume fraction. The outstanding performance of these materials in X-band opens up opportunities for security and military applications. By controlling the dispersion of the hybrid filler system, we found that there is an excellent opportunity to use these materials for charge storage applications by properly dispersing a conductive and a semi-conductive filler.