High-Performance CO2 and H2O Co-Electrolysis Based on Micro-Structured Hollow Fiber Solid Oxide Electrolysis Cell

Abstract

The world is dedicated to achieving Carbon Neutrality and Circular Economy in the next decades by circulating carbon element. This makes the research related to energy and environment more stringent and urgent. Solid oxide electrolysis cell (SOEC) has been regarded as the key enabling technologies to mitigate the issues and meanwhile can take full use of the intermittent renewable electricity. Herein, we designed a multi-channel hollow fiber SOEC, which presents sub-millimeter channels and separate domains of mechanical strength and catalytic reactions, to split CO2 (and H2O) to CO (and H2), which can be used as the feedstock for Fischer-Tropsch and methanol synthesis. The results show high current density, good performance durability, and low concentration polarization, and thus the new design can achieve compact design together with excellent performance with volumetric productivity of above 125 kmol/m3/hr at 750 degC. Co-electrolysis performance is further explored by incorporating newly designed catalyst for further enhancement. Figure 1