Nanofibrous La0.7Sr0.3FeO3-δ-SDC cobalt-free composite cathode for proton-conducting solid oxide fuel cell

In order to prepare high-efficiency solid oxide fuel cells (SOFCs) at medium temperature, continuous La0.7Sr0.3FeO3-δ (LSF) nanofibers with average diameter of 57 nm and uniform pores are prepared as cathode. At 700 °C, the minimum Rp of cathode is 0.066 Ω cm2, the maximum power density (MPD) of single cell is 1180 mW cm−2, and the corresponding open circuit voltage (OCV) is 1.04 V. By reconstructing the microstructure of cobalt-free cathode, the electrochemical performance of H+-SOFC prepared by La0.7Sr0.3FeO3-δ-Sm0.2Ce0.8O2-δ (LSF-SDC) composite cathode has been greatly improved, which provides an effective method for obtaining porous nanocathodes as well as low-cost, high-performance H+-SOFC.