Synergetic approach to achieve enhanced lithium ion storage performance in ternary phased SnO2–Fe2O3/rGO composite nanostructures

Jixin Zhu; Ziyang Lu; Moe Ohnmar Oo; Huey Hoon Hng; Jan Ma; Hua Zhang; Qingyu Yan

doi:10.1039/C1JM12447A

Synergetic approach to achieve enhanced lithium ion storage performance in ternary phased SnO₂–Fe₂O₃/rGO composite nanostructures†

Jixin Zhu,^a Ziyang Lu,^a Moe Ohnmar Oo,^a Huey Hoon Hng,^a Jan Ma,^a Hua Zhang^a and Qingyu Yan*^abc

* Corresponding authors

^a School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, Singapore
E-mail: alexyan@ntu.edu.sg

^b Energy Research Institute@NTU, Nanyang Technological University, Singapore, Singapore

^c TUM CREATE Centre for Electromobility, Nanyan Technological University, Singapore, Singapore

Abstract

We report here a study on the Li ion storage performance of binary phased SnO₂/rGO and ternary phased SnO₂–Fe₂O₃/rGO composite nanostructures. The SnO₂/rGO and SnO₂–Fe₂O₃/rGO were prepared by a facile wet-chemical approach. The Li storage performances of these samples were closely related to the weight ratio of SnO₂ : rGO or SnO₂ : Fe₂O₃ : rGO. It was found that ternary SnO₂–Fe₂O₃/rGO composite nanostructures (e.g. with a weight ratio of SnO₂ : Fe₂O₃ : rGO = 11 : 1 : 13) showed significant enhancement of the specific capacities and cyclabilities as compared to that of SnO₂/rGO samples. For example, the SnO₂–Fe₂O₃/rGO electrode depicted a specific capacity of 958 mA h g⁻¹ at a current density of 395 mA g⁻¹ (0.5 C) during the 100^th cycle. Such Li storage performances of the SnO₂–Fe₂O₃/rGO electrodes, especially at high current densities (e.g. 530 mA h g⁻¹ at 5 C rate), were also much better than those reported for either SnO₂-based or Fe₂O₃-based electrodes. Such a synergetic effect in the SnO₂/Fe₂O₃/rGO composite nanostructures is promising for the development of advanced electrode materials for rechargeable Li-ion batteries.

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Article information

DOI: https://doi.org/10.1039/C1JM12447A
Article type: Paper
Submitted: 31 May 2011
Accepted: 20 Jun 2011
First published: 27 Jul 2011

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J. Mater. Chem., 2011,21, 12770-12776

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Synergetic approach to achieve enhanced lithium ion storage performance in ternary phased SnO₂–Fe₂O₃/rGO composite nanostructures

J. Zhu, Z. Lu, M. O. Oo, H. H. Hng, J. Ma, H. Zhang and Q. Yan, J. Mater. Chem., 2011, 21, 12770 DOI: 10.1039/C1JM12447A

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