High performance solid oxide electrolysis cell with impregnated electrodes |
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| Institution: | 1. School of Power and Mechanical Engineering, Wuhan University, Wuhan, Hubei 430072, China;2. Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208 USA;3. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China;1. Fuel Cell Research Center, Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea;2. Fuel Cell Project, Research Institute of Industrial Science and Technology (RIST), Pohang 790-330, Republic of Korea |
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| Abstract: | Here we report a solid oxide electrolysis cell (SOEC) employing impregnated electrodes. The cell structure consisted of a porous 430 L metal support, a Ni-Ce0.8Sm0.2O2 − δ (SDC) impregnated 430 L-zirconia stabilized zirconia (YSZ) hydrogen electrode, a scandia stabilized zirconia (SSZ) electrolyte and a Nd2O3-Nd2NiO4 + δ (Nd2O3-NNO) impregnated SSZ oxygen electrode. The cell is prepared by tape casting, co-firing and impregnation techniques. At an applied voltage of 1.3 V and 50% steam content, current density of 2.05 A cm− 2 is obtained at 800 °C. The effect of the variation of H2O/H2 ratio (3/97 to 70/30) on electrolysis performance at 750 °C is evaluated and the long-term stability in electrolysis mode is also investigated. |
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