Reversible Solid Oxide Fuel Cell for Power Accumulation and Generation

D. A. Osinkin D. A. Osinkin , N. M. Bogdanovich N. M. Bogdanovich , S. M. Beresnev S. M. Beresnev , E. Yu. Pikalova E. Yu. Pikalova , D. I. Bronin D. I. Bronin , Yu. P. Zaikov Yu. P. Zaikov
Российский электрохимический журнал
Abstract / Full Text

The anodic and cathodic polarization dependences for the oxygen electrode based on lanthanum-strontium manganite and the fuel Ni-cermet electrode are studied in the temperature range of 700–900°С in gas media that correspond to working conditions of a reversible fuel cell. The temporal behavior of these electrodes is studied in the course of periodic polarity changes of current with the density of 0.5 A/cm2. The electrode overvoltage is shown to be about 0.1 V in modes of power generation and water electrolysis at 900°С and the current density of 0.5 A/cm2. A single electrolyte supported tubular solid-oxide fuel cell was fabricated and tested in the fuel-cell and hydrogen-generation modes. It is found that at 900°С and overvoltage of 0.7 V, the cell generates the specific electric power of 0.4 W/cm2 when the 50% H2 + 50% H2O gas mixture is used as the fuel and air is used as the oxidizer. At the water electrolysis with the current density of 0.5 A/cm2, which under normal conditions corresponds to generation of about 0.2 and 0.1 L/h of hydrogen and oxygen, respectively, the consumed power is about 0.55 W/cm2. The efficiency of the conversion cycle electric power–hydrogen–electric power is 70–75%.

Author information
  • Institute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620137, Russia

    D. A. Osinkin, N. M. Bogdanovich, S. M. Beresnev, E. Yu. Pikalova, D. I. Bronin & Yu. P. Zaikov

  • Ural Federal University, Yekaterinburg, 620002, Russia

    D. A. Osinkin, E. Yu. Pikalova, D. I. Bronin & Yu. P. Zaikov

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