Abstract:
A green chemistry approach (hydrothermal microwave irradiation) has been used to deposit manganese
oxide on nickel foam-graphene. The 3D graphene was synthesized using nickel foam template by chemical
vapor deposition (CVD) technique. Raman spectroscopy, X-ray diffraction (XRD), scanning electron
and transmission electron microscopies (SEM and TEM) have been used to characterize structure and
surface morphology of the composite, respectively. The Raman spectroscopy measurements on the samples
reveal that 3D graphene consists of mostly few layers with low defect density. The composite was
tested in a three electrode configuration for electrochemical capacitor, and exhibited a specific capacitance
of 305 F g−1 at a current density of 1Ag−1 and showed excellent cycling stability. The obtained
results demonstrate that microwave irradiation technique could be a promising approach to synthesis
graphene based functional materials for electrochemical applications.
