Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Abstract

Silver metal nanoparticles were decorated by electron beam evaporation on graphene foam (GF) grown by chemical vapor deposition. X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy, and atomic force microscopy were used to investigate the structure and morphology of the graphene foam/silver nanoparticles (GF/Ag). Both samples were tested as electrodes for supercapacitors. The GF/Ag exhibited a significantly higher capacitive performance, including a specific capacitance value of ( 110 Fg 1 ) and excellent cyclability in a three-electrode electrochemical cell. These results demonstrate that graphene foam could be an excellent platform for metal particles to investigate improved electrochemical performance.