Facile synthesis of CNTs/Co(OH)(2) hybrid nanostructures for high-performance electrochemical supercapacitor

Abstract

The sprayed carbon nanotubes (CNTs) and cobalt hydroxide (Co(OH)(2)) were successfully prepared by a simple low-temperature hydrothermal method as supercapacitor electrode. With the hydrothermal time of 120 min, highest specific capacitance of 1154.01 F/g at a scan rate of 20 m Vs(-1) in 3 M KOH was observed. The CNTs/Co (OH)(2) hybrid structures demonstrates an enhanced specific capacitance and the best cycling stability with capacitance retention of 82% after 1000 cycles. Thus, this study exhibited that the CNTs/Co(OH)(2) has great potential application as electrode materials for electrochemical supercapacitors.