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Journal of Materials Science

, Volume 51, Issue 3, pp 1572–1580 | Cite as

Fe3O4-based core/shell nanocomposites for high-performance electrochemical supercapacitors

  • Qianhui Wu
  • Ming Chen
  • Kaiyu Chen
  • Shishuang Wang
  • Chengjiao Wang
  • Guowang Diao
Original Paper

Abstract

In this work, magnetite (Fe3O4)-based core/shell composites, including Fe3O4@carbon (C), Fe3O4@polyaniline (PANI), and Fe3O4@C@PANI, are synthesized via a facile hydrothermal process. The as-prepared core/shell composites are characterized by transmission electron microscopy, X-ray diffraction powder, and Fourier transform infrared spectroscopy. The electrochemical performances of Fe3O4, Fe3O4@C, Fe3O4@PANI, and Fe3O4@C@PANI are investigated using cyclic voltammetry, galvanostatic charge–discharge measurement, and electrochemical impedance spectroscopy. The results show that the as-prepared nanomaterials are all typical pseudocapacitance capacitors. Carbon shell can significantly increase the electronic conductivity of electrode materials, reduce capacity loss, and improve the reversibility of Fe3O4. PANI coating layer can expressively enhance the specific capacitance. Synergistic effect of double shells improves the electrochemical property of Fe3O4. Fe3O4@C@PANI composites display the high capacitance of 322.5 F g−1 at 2.5 A g−1, and 87.8 % of which can still be maintained after 3000 charge–discharge cycles. The excellent electrochemical properties of Fe3O4@C@PANI evidence their potential application as supercapacitors in energy storage field.

Keywords

Fe3O4 PANI Specific Capacitance Ultrasonic Irradiation High Specific Capacitance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant No. 21273195), a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the Natural Science Foundation of Education Committee of Jiangsu Province (12KJB150023). The work was also sponsored by Qing Lan Project of Higher Learning Institutions in Jiangsu Province, the support of high-end talent plan of Yangzhou university, and Jiangsu Key Laboratory of Environmental Material and Environmental Engineering (K11032, K13062). The authors also acknowledge the Testing Center of Yangzhou University for TEM, XRD, and EDX experiments.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.College of Chemistry and Chemical EngineeringYangzhou UniversityYangzhouPeople’s Republic of China

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