Synthesis and Reversible Li-intercalation Behavior of BaFeO4 films

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  • IDO Hidekazu
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • HIRAYAMA Masaaki
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • KANNO Ryoji
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

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Abstract

Barium iron oxide containing hexavalent iron (FeVIO42−) was directly synthesized on iron substrates by anodic oxidation using Ba(OH)2 solution. The lithium (de)intercalation properties were investigated using X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and electrochemical charge/discharge measurements. A 45 nm thick BaFeO4 film exhibited a discharge capacity of 300 mAh g−1, which is close to the theoretical value of 313 mAh g−1 calculated from the three electron reaction between iron VI and III states.

Journal

  • Electrochemistry

    Electrochemistry 80 (3), 139-141, 2012

    The Electrochemical Society of Japan

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