Fe3O4-based core/shell nanocomposites for high-performance electrochemical supercapacitors
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- 作者：Qianhui Wu ; Ming Chen ; Kaiyu Chen ; Shishuang Wang…
- 刊名：Journal of Materials Science
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：51
- 期：3
- 页码：1572-1580
- 全文大小：2,262 KB
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Ming Chen (1)
Kaiyu Chen (1)
Shishuang Wang (1)
Chengjiao Wang (1)
Guowang Diao (1)
1. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, People’s Republic of China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Characterization and Evaluation Materials
Polymer Sciences
Continuum Mechanics and Mechanics of Materials
Crystallography
Mechanics - 出版者：Springer Netherlands
- ISSN：1573-4803
文摘
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.