One-step Preparation of Binder-free Nickel Containing Graphene Foam
Electrode for Supercapacitors
Abstract
A nickel hydroxide (Ni(OH) 2)-modified reduced graphene
oxide (rGO) foam electrode for supercapacitor application is presented
in this study. The electrode was made without binder through a one step
process. In order to compare the supercapacitor performance of as
synthesized graphene foam electrode, rGO and rGO:carbon black (CB)
standard electrodes with PVDF-HFP binder were also synthesized . All
electrodes were then characterized structurally (XPS, EDS, RAMAN, XRD,
and FT-IR) and morphologically (SEM). Ni-containing electrodes were
found in the α-Ni(OH)2:rGO structure. NirGO3 has 800 Fg
-1 capacitance, while rGO:CB has 900. Thus NirGO3 has
the best capacitive performance among binder-free electrodes, comparable
to rGO:CB.