Growth of TiO2 nanorod arrays on reduced graphene oxide with enhanced lithium-ion storage

Lifang He; Ruguang Ma; Ning Du; Jianguo Ren; Tailun Wong; Yangyang Li; Shuit Tong Lee

doi:10.1039/C2JM33571A

Growth of TiO₂nanorod arrays on reduced graphene oxide with enhanced lithium-ion storage†

Lifang He,^a Ruguang Ma,^a Ning Du,^b Jianguo Ren,^a Tailun Wong,^a Yangyang Li^a and Shuit Tong Lee*^ac

* Corresponding authors

^a Center of Super-Diamond Advanced Films (COSDAF) and Department of Physics & Materials Science, City University of Hong Kong, Hong Kong SAR, China
E-mail: apannale@cityu.edu.hk

^b State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

^c Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Suzhou 215123, China
E-mail: apannale@suda.edu.cn

Abstract

We demonstrate the synthesis of a sandwich-like nanocomposite by planting rutile TiO₂ nanorods onto reduced graphene oxide (RGO) via a modified seed-assisted hydrothermal growth method. The synthetic process consists of functionalization of graphene oxide (GO), followed by hydrolytic deposition of TiO₂ nanoparticles on GO and reduction, and finally hydrothermal growth of rutile TiO₂ nanorods on RGO. The resultant nanocomposite, i.e. rutile TiO₂ nanorod arrays on RGO (TONRAs–RGO), exhibits largely enhanced reversible charge–discharge capacity and rate capability compared to bare TiO₂ nanorods (TONRs) due to its unique structure and superior conductivity. The rate performance of the nanocomposite is also better than that of anatase TiO₂ nanoparticles. This study will inspire better design of RGO-based nanocomposites for high energy density lithium-ion battery applications.

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Article information

DOI: https://doi.org/10.1039/C2JM33571A
Article type: Paper
Submitted: 04 Jun 2012
Accepted: 20 Jul 2012
First published: 25 Jul 2012

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J. Mater. Chem., 2012,22, 19061-19066

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Growth of TiO₂ nanorod arrays on reduced graphene oxide with enhanced lithium-ion storage

L. He, R. Ma, N. Du, J. Ren, T. Wong, Y. Li and S. T. Lee, J. Mater. Chem., 2012, 22, 19061 DOI: 10.1039/C2JM33571A

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