BaFeO薄膜の電気化学合成とLiインターカレーション特性

概要

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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.