Valence Change Ability and Geometrical Occupation of Substitution Cations Determine the Pseudocapacitance of Spinel Ferrite XFe2O4(X = Mn, Co, Ni, Fe)

Chao Wei, Zhenxing Feng, Murat Baisariyev, Linghui Yu, Li Zeng, Tianpin Wu, Haiyan Zhao, Yaqin Huang, Michael J. Bedzyk, Thirumany Sritharan, Zhichuan J. Xu*

*Corresponding author for this work

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

A study was conducted to report an investigation on the pseudocapacitive performance of spinel ferrites using an in situ X-ray absorption technique. As the pseudocapacitive behavior was associated with redox reactions of metal ions in the near-surface regions of oxides, ferrite nanoparticles with diameters less than 10 nm were chosen to ensure the dominant contribution of the surface to X-ray absorption signals. In situ X-ray near edge structure (XANES) analysis was first conducted to screen the substitutions of Mn, Co, Ni, and Fe. The ability of the substitution cations to change their valence state within the spinel ferrite frame was found critical for offering pseudocapacitance.

Original languageEnglish (US)
Pages (from-to)4129-4133
Number of pages5
JournalChemistry of Materials
Volume28
Issue number12
DOIs
StatePublished - Jan 1 2016

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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