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Facile Fabrication of Reduced Graphene Oxide/Polypyrrole Composite Hydrogels with Excellent Electrochemical Performance and Compression Capacity
- Ni, Tao, Xu, Liang, Sun, Yupeng, Yao, Wei, Dai, Tingyang, Lu, Yun
- ACS sustainable chemistry 2015 v.3 no.5 pp. 862-870
- ambient temperature, capacitance, crosslinking, electrochemistry, energy, graphene, graphene oxide, hydrogels, oxidation, polymerization, polymers
- 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.