NiS/reduced　graphene　oxide　nanocomposites　were　prepared　by　a　hydrothermal　method.　Electron　microscope　observation　revealed　that　the　materials　were　of　thin　sheet-like　structure　and　X-ray　diffraction　indicated　the　NiS　of　high-purity　on　the　graphene　nanosheets.　Nitrogen　adsorption　on　the　samples　at　77　K　revealed　the　porous　properties.　Such　materials　were　pseudo-active,　exhibiting　high　specific　capacitance　of　978　F　g-1　at　1　A　g-1　in　3M　KOH　and　high　capacitance　retention　of　76%　over　1000　cycles　at　5　A　g-1,　promising　for　applications　in　supercapacitors.　©　2016　Bentham　Science　Publishers.