Application of Nanofibrous LSCF@GDC Composite Oxygen Electrodes in Reversible Solid Oxide Fuel Cells

Abstract:

Reversible solid oxide fuel cell (RSOFC) can theoretically achieve a relatively high energy conversion efficiency. The key to its widespread application is the increased hydrogen production and output current by further enhancing the current density. However, insufficient catalytic activity of the oxygen electrodes has become an obstacle to the application of RSOFC. The research successfully prepared the composite LSCF@GDC nanofibers with reversible oxygen evolution and reduction electrocatalytic activity synthesized by electrospinning technique. Results show that, compared with the oxygen electrodes materials synthesized by the traditional sol-gel method, the oxygen electrodes with three-dimensional nanofiber structure in this work described greatly reduces the battery polarization impedance, increases the discharge power density and electrolytic current density, and shows better reversibility and stability in long-term tests. This research confirms the advantage of electrode morphology engineering control in expanding the catalytic interface and reaction sites.