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Electrochemical preparation of nanostructured TiO2 as anode materials for Li ion batteries

Published online by Cambridge University Press:  15 March 2011

Huanan Duan ,
Xiangping Chen ,
Joe Gnanaraj  and
Jianyu Liang
Huanan Duan
Affiliation:
Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA 01609, U.S.A.
Xiangping Chen
Affiliation:
Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA 01609, U.S.A. College of Material Science & Technology, South China University of Technology, Guangzhou, Guangdong 510644, China
Joe Gnanaraj
Affiliation:
Yardney Technical Products, Inc., 82 Mechanic Street, Pawcatuck, CT 06379, U.S.A.
Jianyu Liang
Affiliation:
Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA 01609, U.S.A.
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Abstract

TiO2 is an attractive anode material for Li-ion batteries due to its high capacity, high mechanical stability during Li intercalation/deintercalation process, limited side reactions with the electrolyte, low cost, and environmental friendliness. In this study, titanium hydroxide gel films were prepared in acidic aqueous solutions of TiOSO4, H2O2 and KNO3 by potentiostatic cathodic electrosynthesis on various copper substrates, including planar Cu foil, mechanically polished planar Cu foil, and Cu nanorod arrays grown on Cu foil. Crystalline TiO2 films were obtained by heat treating the electrodeposited titanium hydroxide gel films at 500 oC in argon atmosphere. The morphology and microstructure of the TiO2 films were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). SEM results showed that after deposition, each Cu nanorod has been covered by a layer of TiO2 gel, forming a core-shell structure. The effects of Cu nanorod arrays on the morphology and the electrochemical property of the TiO2 deposits were discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1127: Symposium T – Mobile Energy , 2008 , 1127-T01-02
Copyright
Copyright © Materials Research Society 2009

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