Preparation and electrochemical characterization of TiO2 nanowires as an electrode material for lithium-ion batteries

• Published in: Electrochimica acta Vol. 53; no. 27; pp. 7863 - 7868
• Main Authors: YUNFEI WANG, MUYING WU, ZHANG, W. F
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier 15.11.2008
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Titanium IV Oxides; Secondary cell; Electrode material; Discharge charge cycle; Characterization; Lithium-ion batteries; Energetic efficiency; Preparation; Electrochemistry; Lithion ion batteries; Nanowires; TiO2 nanowire; Electrical characteristic; Electrochemical impedance spectroscopy; Discharge-charge
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2008.05.068

Anatase TiO2 nanowires containing minor TiO2(B) phase were prepared by a hydrothermal chemical reaction followed by the post-heat treatment at 400 deg C. The phase structure and morphology were analyzed by X-ray diffraction, Raman scattering, transmission electron microscope, and field-emission scanning electron microscopy. The electrochemical properties were investigated by employing constant current discharge-charge test, cyclic voltammetry, and electrochemical impedance techniques. These nanowires exhibited high rate capacity of 280 mAh g-1 even after 40 cycles, and the coulombic efficiency was approximately 98%, indicating excellent cycling stability and reversibility. The electrochemical impedance spectra showed a stable kinetic process of the electrode reaction. These results indicated that the TiO2 nanowires have promising application for high energy density lithium-ion batteries.