Facile electrodeposition route for the fabrication of Ni/Ni(OH)2 nanocomposite films with different supporting electrolytes and their electrochemical properties

A facile electrochemical deposition method synthesized Ni/Ni(OH)2 nanocomposites with different interlayer anions (Cl− and SO42−). Materials characterization and electrochemical tests (XRD, SEM, TEM, CV, GCD, EIS, etc.) were carried out to study the effect of interlayer anions on the morphology and electrochemical performance. The results demonstrated that the Cl− intercalated Ni/Ni(OH)2 nanocomposites exhibited higher specific capacitance and better cycle performance than SO42− interlayer anions. The Cl− intercalated Ni/Ni(OH)2 nanocomposites show a high specific capacity of 1295 Fg−1 at the current densities of 1 Ag−1 and excellent cycling stability with capacitance retention of 80.1% after 300 cycles.