Highly conductive polymer composites were fabricated with a novel type of graphene-based filler, electrochemically exfoliated graphene sheets (EGs) produced without conventional oxidation/reduction of graphene oxide (GO). The high electrical conductivity of 417 ± 83 S m⁻¹ at a content loading of 5.8 vol% and a low percolation threshold of 0.37 vol% could be attainable. Microscopic and spectroscopic investigations demonstrated the effective dispersion of EG-fillers on the surface of polymer particles and visualized the actual conducting channel between the polymer matrices.