Synthesis of Aminopyrene-tetraone-Modified Reduced Graphene Oxide as an Electrode Material for High-Performance Supercapacitors

Abstract

In this study, we successfully anchored 2aminopyrene-3,4,9,10-tetraone (PYT-NH 2 ), a small organic molecule, onto graphene oxide (GO) and then further chemically reduced it to obtain PYT-NH 2 /reduced graphene oxide (rGO). We observed that, as an electrode material for high-performance supercapacitor application, PYT-NH 2 /rGO exhibited higher capability and smaller charge transfer resistance in comparison with PYT-NH 2 /GO, rGO, and PYT-NH 2 . The specific capacitances were measured as 326.6 and 229.2 F g −1 for PYT-NH 2 /rGO and PYT-NH 2 /GO, respectively, at a current density of 0.5 A g −1 in 1 M sulfuric acid (H 2 SO 4 ) electrolyte. In addition, we obtained the capacitance of 77.2 F g −1 for PYT-NH 2 /rGO//activated carbon (AC) at 0.5 A g −1 with an energy density of 15.4 W h kg −1 . Moreover, for the fabricated hybrid capacitor, the capacitance retention of 25 000 cycles was nearly 100% at 5 A g −1 , thus manifesting excellent electrochemical stability and signaling promising potential in energy storage applications.

Covalent functionalization of carbon materials with redox-active organic molecules for energy storage

“…Selected examples are summarized in Table 1. Reduced graphene oxide (RGO) was functionalized with phenylenediamine (RGO-PD), 102 2-aminoanthraquinone (RGO-AAQ), 103 and 2-aminopyrene-3,4,9,10-tetraone (RGO-PYT) 104 through the nucleophilic ring-opening reaction of the epoxide group and applied for SCs. The resulting composite materials showed capacitance retention values of 92%, 100%, and 100%, respectively.…”

Diaminopyrene modified reduced graphene oxide as a novel electrode material for excellent performance supercapacitors

“…The absorption peaks located at around 837.44 cm À1 , 1188.42 cm À1 , 1574.59 cm À1 , and 1718.26 cm À1 could be attributed to the N-H wagging vibration, C-N stretching vibration, N-H bending vibration (it mainly comes from amide bond and the diaminopyrene which are not bonded with graphene functional group), and C-O stretching vibrations which is due to the p-p conjugation of the non-shared electron pair on the N atom in the amide I band with the carbonyl group, respectively. 30,33,34 What's more, combined with the comparison of the spectra of DAP, rGO, and DAPrGOs ( Fig. S3 †), we infer that the broad peak located at around 3356.01 cm À1 and a weak peak located in 3225.84 cm À1 were mainly attributed to the -NH stretching vibration (some -NH bonds of them should come from the formed amide bond) and -NH 2 stretching vibration, as well as a small amount of the stretching vibration of -OH functional groups which not reduced in rGO.…”

Novel Preparation of Reduced Graphene Oxide–Silver Complex using an Electrical Spark Discharge Method

“…The size of the AgNP was approximately 15 nm, and the lattice width was 0.23 nm, with a crystal structure of (111). Moreover, the thickness of rGO was 0.21 nm, with a crystal structure of (100) [41].…”