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

摘要

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 β-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.