Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

• DOI: 10.1002/cey2.262
• Publication Date: 2022-07-21T06:59:58Z
• Authors: Anqi Wu; Chaolei Li; Beibei Han; Wu Liu; Yang Zhang; Svenja Hanson; Wanbing Guan; Subhash C. Singhal
• Keywords: Electrolytic cell

Abstract CO 2 electrolysis with solid oxide electrolytic cells (SOECs) using intermittently available renewable energy has potential applications for carbon neutrality and storage. In this study, a pulsed current strategy is used to replicate intermittent availability, the stability conversion rate of cyclic operation by large‐scale flat‐tube SOEC are studied. One hundred cycles under ranging from −100 −300 mA/cm total operating time about 800 h were carried out. The results show that after 100 cycles, cell voltage attenuates 0.041%/cycle in high stage , indicating lifetime can reach up 500 cycles. reached 52%, which close theoretical value 54.3% at calculated efficiency approached 98.2%, assuming heat recycling. This study illustrates significant advantages efficient electrochemical conversion, emission mitigation, seasonal