Sonochemical synthesis of nanostructured nickel hydroxide as an electrode material for improved electrochemical energy storage application

A facile and fast approach for the synthesis of a nanostructured nickel hydroxide (Ni(OH)(2)) via sonochemical technique is reported in the present study. The X-ray diffraction results confirmed that the synthesized Ni(OH)(2) was oriented in beta-phase of hexagonal brucite structure. The nanostructured Ni(OH)(2) electrode exhibited the maximum specific capacitance of 1256 F/g at a current density of 200 mA/g in 1 M KOH(aq). Ni(OH)(2) electrodes exhibited the pseudocapacitive behavior due to the presence of redox reaction. It also exhibited long-term cyclic stability of 85% after 2000 cycles, suggesting that the nanostructured Ni(OH)(2) electrode will play a promising role for high performance supercapacitor application.