▎ 摘　　要

A straightforward and efficient approach was demonstrated for the synthesis of an ionic conjugated, reduced graphene oxide/poly (2-ethynylpyridinium) (RGO/P2EP) hybrid via covalent bond chemistry. Graphene oxide (GO) were treated with thionyl chloride to yield acylated GO (GO-COCl), which was subsequently used to activate the polymerization of 2-ethynylpyridine (2-EPy). FTIR and XPS results revealed that 2-EPy was successful polymerized in the presence of GO-COCl and covalently attached onto the surfaces of GO sheets. The XRD and FESEM results indicated that GO sheets were encapsulated in the P2EP matrix. The as-obtained hybrid exhibited an excellent dispersion in water. When evaluated as an electrode material for supercapacitors, the RGO/P2EP hybrid exhibited a high specific capacitance of 225 F g(-1) at the current density of 0.5 A g(-1), remarkable rate capability, and excellent cycling performance with the capacitance retention of similar to 94% after 1000 cycles. The enhanced electrochemical property can be attributed to the synergetic effect and strong interfacial interaction at the interface of RGO/P2EP. (C) 2015 Elsevier B.V. All rights reserved.