Lee, D. Kim, J. Moon, J. 2024-01-20T09:02:04Z 2024-01-20T09:02:04Z 2021-09-02 2014-09 2187-0764 https://pubs.kist.re.kr/handle/201004/126392 We propose a novel electrode design for co-planar single chamber solid oxide fuel cells. The concentric electrodes as well as the controlled gas flow in perpendicular to the center of the electrode enable continuous laminar flow from the cathode to the anode, which leads optimal residence time of the gas near electrodes and in turn allows high-performance stable operation. The steady state gas flow without turbulence determines not only the local thermodynamic equilibrium, but also the kinetics of the electrochemical reactions. The cell with the concentric electrodes shows the maximum open circuit voltage (OCV) of 0.70 V, and the maximum power density is improved by 154%. In contrast, the conventional cell with linear-shaped electrodes exhibits the maximum OCV of 0.55 V. Impedance spectroscopy reveals that the polarization resistance is reduced by altering the electrode design from the linear-shape to the concentric design. ？ 2014 The Ceramic Society of Japan and the Korean Ceramic Society. English Elsevier B.V. Design Flow of gases Laminar flow Open circuit voltage Solid oxide fuel cells (SOFC) Electrochemical reactions Impedance spectroscopy Local thermodynamic equilibrium Maximum power density Polarization resistances Single chamber solid oxide fuel cells Stable operation Steady-state gas flow Electrodes Co-planar single chamber solid oxide fuel cells with concentric electrodes Article 10.1016/j.jascer.2014.05.009 1 Journal of Asian Ceramic Societies, v.2, no.3, pp.185 - 189 Journal of Asian Ceramic Societies 2 3 185 189 scopus 2-s2.0-85024948573 Letter Design Flow of gases Laminar flow Open circuit voltage Solid oxide fuel cells (SOFC) Electrochemical reactions Impedance spectroscopy Local thermodynamic equilibrium Maximum power density Polarization resistances Single chamber solid oxide fuel cells Stable operation Steady-state gas flow Electrodes Co-planar design Concentric electrode Single chamber solid oxide fuel cell