Facile Fabrication of Reduced Graphene Oxide/Polypyrrole Composite Hydrogels with Excellent Electrochemical Performance and Compression Capacity

We report a facile method to fabricate reduced graphene oxide/polypyrrole hydrogels (rGO/PPy) simply by combining the self-assembly process at room temperature with oxidation polymerization at elevated temperature. The as-prepared composite hydrogels possess a cross-linked 3D hierarchical porous structure and show a compression-tolerant property and a high specific capacitance of 473 F g–1 at 1 A g–1. In particular, 82% of the capacitance value has been maintained after charge–discharge for 5000 cycles, suggesting the great potential applications of the rGO/PPy hydrogels in high-quality energy storage devices. This study provides a novel reference way for the self-assembly of other conducting polymer and graphene sheets for different applications.