Solvothermal in-situ preparation of poly(1,5-diaminoanthraquinone) grafted graphene with superior electrochemical performance

Abstract

Poly(1,5-diaminoanthraquinone) (PDAA) has attracted intense interests as electrode materials for supercapacitors. The interaction between PDAA and conductive frameworks plays an important role on the electrochemical performance of the flexible devices. Here, facile and efficient strategy was developed to covalently graft PDAA onto graphene oxide (GO) via solvothermal in-situ chemical oxidation polymerization, in which GO was oxidized and cut into pieces to produce more functional groups for PDAA grafting. Owing to the strong interaction, the PDAA-rGO/rEGO based flexible symmetric solid-state supercapacitors (SSSCs) possessed a capacitance of 203.1 mF cm−2, power density of 241.5 mW cm−2 and energy density of 18.0 mWh cm−2 at 0.50 mA cm−2, with superior capacitance retention of 92.5% and 93.3% after 10000 CV cycles and 300 cycles of 180°-bending.