Electrochemical investigation on nanoflower-like CuO/Ni composite film as anode for lithium ion batteries

• Published in: Electrochimica acta Vol. 54; no. 4; pp. 1160 - 1165
• Main Authors: Xiang, J.Y., Tu, J.P., Yuan, Y.F., Wang, X.L., Huang, X.H., Zeng, Z.Y.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 30.01.2009; Elsevier
• Subjects: Anode; Applied sciences; CuO; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrodeposition; Exact sciences and technology; Lithium ion battery; Ni layer; Ni layer; Lithium ion battery; Electrodeposition; Anode; CuO; X ray; Electrode material; Discharge charge cycle; Surface structure; Photoelectron spectrometry; Electrical characteristic; Modified material; Scanning electron microscopy; Cycling; Transition metal; Secondary cell; Nanostructure; X ray diffraction; Copper Oxides; Transmission electron microscopy; Morphology; Preparation; Lithion ion batteries; Nickel; Specific capacity
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2008.08.066

Nanoflower-like CuO/Ni film was prepared by electrodeposition method in an alkaline nickel electroplating solution, and the nanoflower-like CuO film was obtained by direct oxidation on copper substrate. The nanoflower-like CuO was crystalline with space group of C2/c, and the amorphous Ni particle layer on the surface of film contacted well with the nanoflower-like CuO. The electrochemical properties of CuO/Ni film were investigated by cyclic voltammetry (CV) and galvanostatic charge–discharge tests. Since the metallic Ni can act as conductor and catalyst, the CuO/Ni film exhibits higher initial coulombic efficiency (72.1%) than the pure CuO film (57.0%), and better capacity retention (96.3% of the 2nd cycle) than the pure CuO film (67.8% of the 2nd cycle) at the current density of 0.1 mA cm −2.