Electrical Conductivity of PbO and Discharge Property of Thin Film PbO2/PbO/Pb Solid Cell

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  • TAGUCHI Masami
    Department of Materials Science and Engineering, Faculty of Engineering and Resource Science, Akita University
  • KANDA Kazunori
    Department of Materials Science and Engineering, Faculty of Engineering and Resource Science, Akita University

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タイトル別名
  • Electrical Conductivity of PbO and Discharge Property of Thin Film PbO<sub>2</sub>/PbO/Pb Solid Cell

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<p>In order to develop all solid state electrochemical cells, thin film PbO2/PbO/Pb solid cells were produced. All the constituents were systematically deposited on a glass substrate by reactive sputtering and vacuum evaporation. The discharge properties of the solid cells were improved by the addition of a uni-valent impurity such as sodium or potassium to the PbO electrolyte; the electromotive force of the solid cell using PbO-3.13 mass % Na2CO3 as the electrolyte reached 69% of the theoretical value during discharge. On the other hand, the presence of a tri-valent impurity such as antimony or bismuth in the electrolyte decreased the electromotive force. The electrolytes with the uni-valent impurities had a lower electronic conductivity compared with the impurity-free PbO, while the electrolytes with the tri-valent impurities had a higher one. These results were interpreted by a point defect model of oxygen ion vacancies which are the dominant defects in the PbO electrolyte; the uni-valent impurities increase the concentration of the vacancies to improve the ionic conductivity of the electrolyte. Also, the discharge reactions at both interfaces of PbO2/PbO and PbO/Pb were determined by X-ray photoelectron spectroscopy.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 67 (12), 1249-1253, 1999-12-05

    公益社団法人　電気化学会

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