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Facile synthesis of ATO/MnO2 core–shell architectures for electrochemical capacitive energy storage

Authors
  • Zhang, Zhiqiang
  • Ma, Congcong
  • He, Lian
  • Huang, Ming
  • Yu, Liang
  • Zhang, Yuxin1, 2
  • 1 College of Materials Science and Engineering, Chongqing University
  • 2 National Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University
Type
Published Article
Journal
Ceramics International
Publisher
Elsevier
Publication Date
Jan 01, 2014
Accepted Date
Mar 03, 2014
Identifiers
DOI: 10.1016/j.ceramint.2014.03.002
Source
Elsevier
Keywords
License
Unknown

Abstract

The mesoporous ATO/MnO2 core–shell architectures are prepared through a one-pot templated-assembly route. The morphologies and structures of ATO nanoparticles and ATO/MnO2 nanocomposites are examined by focus ion beam scanning electron microscopy (FIB/SEM) and X-ray diffraction spectroscopy (XRD). Furthermore, the electrochemical properties of the ATO/MnO2 nanocomposites electrodes are elucidated by cyclic voltammograms, galvanostatic charge/discharge tests and electrochemical impedance spectroscopy in 1M Na2SO4 electrolyte. The results demonstrate that the ATO/MnO2 nanostructure electrodes exhibit highly reversible features, good specific capacitance (186.8Fg−1), and good capacitance retention (76.8% over 1000 cycles). Indeed, the ATO nanoparticles provide a high conductivity for core–shell architectures. These findings indicate the suitability of the low-cost ATO/MnO2 nanocomposites as a potential electrode material for supercapacitors.

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