Preparation and electrochemical performance of alpha-nickel hydroxide nanowire

• Published in: Materials chemistry and physics Vol. 126; no. 3; pp. 580 - 583
• Main Authors: Wang, Yao-xian, Hu, Zhong-ai, Wu, Hong-ying
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.04.2011
• Subjects: Anodic aluminum oxide (AAO); Aqueous electrolytes; Capacitors; Diffraction; Hydroxides; Nanocomposites; Nanomaterials; Nanostructure; Nanowire; Nanowires; Specific capacitance; Voltammetry; X-rays; α-Nickel hydroxide; Nanowire; Specific capacitance; Anodic aluminum oxide (AAO); α-Nickel hydroxide
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2011.01.022

► We first synthesized α-Ni(OH) 2 nanowires without substitution. ► Adopted the conversely migrate technique. ► Ni(OH) 2 nanowires exhibited an excellent electrochemical capacitive behavior. ► α-Ni(OH) 2 nanowire is promising for electrochemical capacitor applications. Alpha-nickel hydroxide nanowire with diameter of 60 nm was successfully synthesized by conversely migrates technique. Structural and morphological characterizations were performed using power X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The capacitive properties were evaluated by cyclic voltammetry (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy technique in 6 M KOH aqueous electrolyte. A maximum specific capacitance of 833 F g −1 was obtained at constant current of 5 mA, indicating that the α-nickel hydroxide nanowire is a promising electrode material for electrochemical capacitors.