Synthesis, spectroscopic analysis and electrochemical performance of modified b-nickel hydroxide electrode with CuO

Title:	Synthesis, spectroscopic analysis and electrochemical performance of modified b-nickel hydroxide electrode with CuO
Authors:	Shruthi, B. Madhu, B.J. Raju, V. Bheema Vynatheya, S. Devi, B.Veena Jayashree, G.V. Ravikumar, C.R.
Keywords:	Nickel hydroxide;Spectroscopic analysis;Thermal analysis;Electrochemical properties;Impedance spectroscopy
Issue Date:	2017
Publisher:	H. : ĐHQGHN
Abstract:	In the present work, a modifiedb-nickel hydroxide (b-Ni(OH)2) electrode material with CuO has been prepared using a co-precipitation method. The structure and property of the modifiedb-Ni(OH)2 with CuO were characterized by X-ray diffraction (XRD), Fourier Transform infra-red (FT-IR), Raman and thermal gravimetric-differential thermal analysis (TG-DTA) techniques. The results of the FT-IR spec-troscopy and TG-DTA indicate that the modifiedb Ni(OH)2electrode materials contain intercalated water molecules and anions. A pastedetype electrode was prepared using nickel hydroxide powder as the main active material on a nickel sheet as a current collector. Cyclic voltammetry (CV) and Electrochemical impedance spectroscopy (EIS) studies were undertaken to assess the electrochemical behavior of pureb-Ni(OH)2and modifiedb-Ni(OH)2electrode with CuO in a 6 M KOH electrolyte. The addition of CuO intob-nickel hydroxide was found to enhance the reversibility of the electrode reaction and also increase the separation of the oxidation current peak of the active material from the oxygen evolution current. The modified nickel hydroxide with CuO was also found to exhibit a higher proton diffusion coefficient and a lower charge transfer resistance. These findings suggest that the modifiedb-Ni(OH)2with CuO possesses an enhanced electrochemical response and thus can be recognized as a promising candidate for battery electrode applications
Description:	p. 93-98
URI:	http://repository.vnu.edu.vn/handle/VNU_123/58280
ISSN:	2468-2284
Appears in Collections:	Advanced Materials and Devices