Electromotive Force and Discharge Properties of Solid State Cell Pb/PbO/PbO<SUB>2</SUB>

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  • Taguchi Masami
    Department of Materials Engineering and Applied Chemistry, Mining College, Akita University
  • Chant Ta-Chen
    Department of Materials Engineering and Applied Chemistry, Mining College, Akita University
  • Baba Tsukasa
    Department of Materials Engineering and Applied Chemistry, Mining College, Akita University

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  • Electromotive Force and Discharge Properties of Solid State Cell Pb/PbO/PbO2
  • Electromotive Force and Discharge Prope

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Abstract

It was found that tetragonal PbO has an ionic conductivity, and the solid state cell using the oxide as an electrolyte has become of interest in recent years. In this study, the PbO2/Pb interfaces, which were obtained by both pressing and electrolyzing, were heated to produce an electrochemical cell at 333 K. The electromotive force and the impedance response of the cell were measured during the heat-treatment. As there is a complete continuity of composition at the interface obtained by electrolyzing, a resistant oxide layer readily grows by heating. The electromotive force of the cell by electrolyzing rises to about 45% of the theoretical value, while that of the cell by pressing is on a μV level. An X-ray analysis confirms that the electromotive force of the cell is caused by the resistant oxide, tetragonal PbO formed in the PbO2/Pb interface. The electromotive force of the cell by electrolysing decreases rapidly during the initial stage of a constant resistance discharge at room temperature, but the degradation is restrained by a rise in working temperature.

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