Abstract
We report growth of nickel cobalt sulfide (NCS) ultrathin nanosheets directly on Ni foam substrate by a
facile and novel electrodeposition method. The as-prepared NCS sample is used as an electrode material
for supercapacitor application due to their large electrochemically active surface area and interconnected
nanosheet channels for the facilitation of ion transportation. The NCS nanosheets possess enhanced
electrochemical performance in terms of fast and high reversible faradaic reactions characterized by
prominent oxidation and reduction peaks. NCS nanosheets showed an ultrahigh specific capacitance of
1712 Fg1 at a current density of 1 Ag1 with excellent cyclic stability. The excellent supercapacitor
performance of NCS nanosheets can be attributed to its rich redox reactions as well as high transport rate
for both electrolyte ions and electrons.
