A facile hydrothermal synthesis of graphene porous NiO nanocomposite and its application in electrochemical capacitors

Facile fabrication of graphene/nickel oxide composite with superior supercapacitance performance by using alcohols-reduced graphene as substrate

“…Meanwhile, the characteristic peaks at 11.4°, 22.8°and 34.2°are in good accordance with the (0 0 1), (0 0 2) and (1 0 1) crystal planes of a-Ni(OH) 2 , respectively [19]. After microwave heat treatment at 300°C, three new peaks are observed at 37.3°, 43.3°and 62.9°, which can be assigned to the (1 1 1), (2 0 0) and (2 2 0) crystal planes of cubic NiO (JCPDS No.47-1049), respectively [20,21]. This indicates that a-Ni(OH) 2 is converted to NiO during the microwave heat treatment.…”

“…2 shows the Raman spectra of G/NiO composite samples. The weak peak at 500 cm À1 can be attributed to the shaking peaks of NiO [20]. The peaks locate at $1340 and 1603 cm À1 are corresponding to the D band and G band of graphene, respectively [24].…”

Co3O4 Nanorods with Self-assembled Nanoparticles in Queue for Supercapacitor

“…It is very clear that the capacitance in different testing potential windows all increased with decrease of currents, and this may be due to the relatively insufficient faradic redox reaction under higher discharge current densities [50,51].…”

Adsorption–photodegradation synergetic removal of methylene blue from aqueous solution by NiO/graphene oxide nanocomposite

“…Jiang et al [11] prepared porous graphene/NiO nanocomposites by hydrothermal method and reported application in electrochemical capacitors. The specific capacitance of graphene/NiO calculated from the discharge curves is about 429.7 F g −1 and it is much larger than that of pure NiO.…”