Electrochemical performance of H2O-CO2 co-electrolysis with a tubular solid-oxide co-electrolysis (SOC) cell

T-H Lim, J-W Lee, S-B Lee, S-J Park, R-H Song
Korea Institute of Energy Research,

Keywords: H2O-CO2, co-electrolysis, tubular SOC cell, electrochemical performance


The H2O-CO2 electrochemical conversion process in solid-oxide co-electrolysis (SOC) cells is potentially an efficient way to reduce CO2 emissions and to store renewable power simultaneously. In this study, a tubular solid-oxide co-electrolysis (SOC) cell based on a general electrode support solid-oxide fuel cell was fabricated and investigated. We fabricated tubular electrode support tubes through an extrusion process, and the essential SOC cell components, i.e., the electrolyte and the electrode, were then coated onto the surface of a ceramic support consecutively using a vacuum slurry and dip-coating method. The cell was operated while varying the operating temperature, cathode gas flow rate, and the supplied amount of H2O. The results demonstrate that the fabricated tubular SOC cell is a promising candidate for many practical applications, such as technology to mitigate climate change and power fluctuations associated with renewable energy.