SOEC cell tester

The test rig allows both the integration of a single cell with an active area of 25 cm² and small cell stacks consisting of up to five such cells. In addition to pure steam electrolysis, the test bench is also suitable for investigating co-electrolysis, in which a mixture of water and carbon dioxide is reduced to synthesis gas, a mixture of hydrogen and carbon monoxide. A special feature of the cell tester is the option to exchange the cells to be tested quickly and non-destructively and still ensure a high gas tightness of the cell housing. With the associated impedance-capable potentiostat (with booster) and an online gas analysis system, detailed information on the various loss mechanisms and by-products during electrochemical conversion can be generated, which can be used for the further development of cells.

Technical data

Cell tester

  • Cell sizes: 40 mm to 70 mm diameter (round cells) or 40 mm x 40 mm to 120 mm x 120 mm (rectangular cells)
  • Shortstacks (up to 5 single cells) can be used
  • Educt gases: N2, air, CO,CO2, H2, H2O
  • Temperature range: 600 °C to 900 °C
  • Online analysis for H2,CO2, CO and CH4


  • Current range: 300 pA to 2 A (with booster: up to 15 A)
  • Frequency range: 10 µHz to 300 kHz (with booster: 10 µHz to 100 kHz)