期刊
MATERIALS LETTERS
卷 118, 期 -, 页码 150-153出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2013.12.059
关键词
Iron oxide; Iron oxyhydroxide; Nanosheets; Electrochemical capacitor
Large area self-standing nanosheets of mixed iron (III) oxyhydroxide/oxide (lepidocrocite, gamma-FeOOH and maghemite, gamma-Fe2O3) were grown directly from an iron foil based on a simple chemical oxidation route. The gamma-FeOOH and gamma-Fe2O3 nanosheets on a conductive substrate can be used directly as an electrode, eliminating additional electrode fabrication procedures. The electrode exhibited high areal capacitance (0.3-0.4 F/cm(2)) and good cycling stability in Na2SO3 electrolyte. Additionally, cycling studies in Na2SO4 disclosed that iron (III) oxyhydroxide/oxide are not stable in Na2SO4, undergoing reductive dissolution with repeated cycling in negative potential window. (C) 2013 Elsevier B.V. All rights reserved.
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