Wet chemical synthesis of Cu/TiO2 nanocomposites with integrated nano-current-collectors as high-rate anode materials in lithium-ion batteries

Fei-Fei Cao; Sen Xin; Yu-Guo Guo; Li-Jun Wan

doi:10.1039/C0CP01119C

Wet chemical synthesis of Cu/TiO₂ nanocomposites with integrated nano-current-collectors as high-rate anode materials in lithium-ion batteries†‡

Fei-Fei Cao,^ab Sen Xin,^ab Yu-Guo Guo*^a and Li-Jun Wan*^a

* Corresponding authors

^a CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, P. R. China
E-mail: ygguo@iccas.ac.cn, wanlijun@iccas.ac.cn
Fax: +86-10-62557908
Tel: +86-10-62557908

^b Graduate School of CAS, Beijing 100064, P. R. China

Abstract

Using a soft-template assisted method, well-organized Cu/TiO₂ nanoarchitectured electrode materials with copper nanowires as their own current collectors are synthesized by controlled hydrolysis of tetrabutyl titanate in the presence of Cu-based nanowires, and investigated by SEM, TEM, XRD, Raman spectroscopy and electrochemical tests towards lithium storage. Two types of Cu/TiO₂ nanocomposites with different TiO₂ grain sizes are obtained by using different thermal treatments. The two types of Cu/TiO₂ nanocomposites show much enhanced rate performances compared with bare TiO₂. A high-rate capability (reversible capacity at 7500 mA g⁻¹ still accounts for 58% of its initial capacity at 50 mA g⁻¹) is observed for the Cu/TiO₂ nanocomposite with smaller TiO₂ grain size. The improvements can be attributed to the integrated Cu nanowires as mechanical supports and efficient current collectors. A cell made from the Cu/TiO₂ nanoarchitectured electrodes exhibits promise as an energy storage device with both high energy and high power densities.

This article is part of the themed collection: ICCAS collection

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Article information

DOI: https://doi.org/10.1039/C0CP01119C
Article type: Paper
Submitted: 08 Jul 2010
Accepted: 24 Nov 2010
First published: 04 Jan 2011

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Phys. Chem. Chem. Phys., 2011,13, 2014-2020

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Wet chemical synthesis of Cu/TiO₂ nanocomposites with integrated nano-current-collectors as high-rate anode materials in lithium-ion batteries

F. Cao, S. Xin, Y. Guo and L. Wan, Phys. Chem. Chem. Phys., 2011, 13, 2014 DOI: 10.1039/C0CP01119C

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