In situ hydrothermal preparation of mesoporous Fe3O4 film for high-performance negative electrodes of supercapacitors

Ke Jiang, Baolong Sun, Mengqi Yao, Ni Wang, Wencheng Hu, Sridhar Komarneni

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14 Scopus citations

Abstract

A mesoporous Fe3O4 film was prepared as binder-free electrode material for supercapacitors through a facile process that included the hydrothermal electroplating of an Fe/Zn alloy, in situ electrolytic dealloying to remove the Zn template, and oxidation in a water vapor environment. The Fe3O4 film showed a cubic structure and mesoporosity with a specific surface area of 247 m2 g−1. As a negative electrode material, the mesoporous Fe3O4 film delivered a high gravimetric capacity of 221 C g−1 at 1 A g−1, and the gravimetric capacity was maintained at 154 C g−1 even at a high current density of 50 A g−1. In addition, the mesoporous Fe3O4 electrode exhibited very high cycling stability (only 4.7% capacity loss after 10,000 galvanostatic charge–discharge cycles). Electrochemical impedance spectroscopy revealed that the mesoporous Fe3O4 film had excellent conductivity, implying its promising application as a supercapacitor electrode.

Original languageEnglish (US)
Pages (from-to)189-194
Number of pages6
JournalMicroporous and Mesoporous Materials
Volume265
DOIs
StatePublished - Jul 15 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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