Study of Mg ion Intercalation in Polycrystalline MoO3 Thin Films

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As-deposited amorphous MoO3 films were found to crystallize into a stable orthorhombic phase on annealing in air at 350°C. The feasibility of using Mg ions as intercalants, in polycrystalline MoO3 thin films has been investigated. These ions were intercalated galvanostatically at a constant current density of 166 μA/cm2. Structural studies carried out on intercalated films, show lattice expansion along b axis by 2.35% for $x = 0.1$ and 3.17% for $x = 0.3$. Partial restoration of $b$-axis is observed on deintecalation. The chemical status of Mo and O ions, before and after intercalation has been investigated using Photoemission Spectroscopy (core level spectra). Core level (CL) of Mo 3d levels indicate the presence of Mo+6 oxidation state only in unintercalated films, with a stoichiometry of MoO3. The intercalated ions are found to reduce Mo ions as revealed by the presence of Mo+5, Mo+4 and Mo+3 states in addition to Mo+6 state. Formation of Mg–O bonds is seen from the CL spectrum of O1s levels. From cyclic voltammetry experiments the estimated diffusion coefficient of Mg ions is found to be of the order of $10^{-19}$ cm2/s and the films are stable even after 300 cycles.

収録刊行物

  • Japanese journal of applied physics. Pt. 1, Regular papers & short notes

    Japanese journal of applied physics. Pt. 1, Regular papers & short notes 43(9A), 6248-6251, 2004-09-15

    公益社団法人 応用物理学会

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各種コード

  • NII論文ID(NAID)
    10013574075
  • NII書誌ID(NCID)
    AA10457675
  • 本文言語コード
    EN
  • 資料種別
    ART
  • 雑誌種別
    大学紀要
  • ISSN
    0021-4922
  • NDL 記事登録ID
    7079826
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A375
  • データ提供元
    CJP書誌  NDL  J-STAGE  JSAP 
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