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This paper reports a simple yet efficient method for the synthesis of hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays based on a stepwise hydrothermal approach. The as-fabricated hybrid arrays show impressive performance as a high-capacity anode for lithium-ion batteries. The key design in this study is a core-branch hybrid architecture, which not only provides large surface active sites for lithium ion insertion/extraction, but also enables fast charge transport owing to the reduced diffusion paths for both electrons and lithium ions. The peculiar combination of attributes of TiO2 (good structural stability) and Fe2O3 (large specific capacity) provides the hybrid array electrodes with several desirable electrochemical features: large reversible capacity (~800 mA·h·g–1 for specific mass capacity and ~750 μA·h·cm–2 for specific areal capacity), good cycling stability, and high rate capability. The impressive electrochemical performance, together with the facile synthesis procedure, may provide an efficient platform to integrate the TiO2 nanowire@Fe2O3 nanothorn core-branch arrays as a three-dimensional thin film electrode for lithium-ion microbatteries.


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Hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays as superior electrodes for lithium-ion microbatteries

Show Author's information Hui Xia1,2( )Wen Xiong1,2Chiew Keat Lim3Qiaofeng Yao4Yadong Wang3( )Jianping Xie4( )
School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China
Herbert Gleiter Institute of Nanoscience Nanjing University of Science and Technology Xiaolingwei 200, Nanjing 210094 China
School of Engineering Nanyang Polytechnic180 Ang Mo Kio Ave 8 Singapore 569830
Department of Chemical & Biomolecular EngineeringFaculty of Engineering National University of Singapore Singapore 117585

Abstract

This paper reports a simple yet efficient method for the synthesis of hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays based on a stepwise hydrothermal approach. The as-fabricated hybrid arrays show impressive performance as a high-capacity anode for lithium-ion batteries. The key design in this study is a core-branch hybrid architecture, which not only provides large surface active sites for lithium ion insertion/extraction, but also enables fast charge transport owing to the reduced diffusion paths for both electrons and lithium ions. The peculiar combination of attributes of TiO2 (good structural stability) and Fe2O3 (large specific capacity) provides the hybrid array electrodes with several desirable electrochemical features: large reversible capacity (~800 mA·h·g–1 for specific mass capacity and ~750 μA·h·cm–2 for specific areal capacity), good cycling stability, and high rate capability. The impressive electrochemical performance, together with the facile synthesis procedure, may provide an efficient platform to integrate the TiO2 nanowire@Fe2O3 nanothorn core-branch arrays as a three-dimensional thin film electrode for lithium-ion microbatteries.

Keywords: hierarchical, hybrid, nanowire arrays, TiO2-B, Fe2O3 , microbatteries

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Publication history
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Acknowledgements

Publication history

Received: 24 March 2014
Revised: 24 June 2014
Accepted: 07 July 2014
Published: 04 September 2014
Issue date: December 2014

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51102134), the Natural Science Foundation of Jiangsu Province (No. BK20131349), the China Postdoctoral Science Foundation (No. 2013M530258), and the Jiangsu Planned Projects for Postdoctoral Research Funds (No. 1202001B).

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